Jobs at DefTech companies

Cyber Harbor is a fast-growing Ukraine-based company founded by engineers and researchers who helped defend critical cyber infrastructure during the war. Our work is shaped by real-world experience, and we build AI-powered systems designed for complex, high-stakes environments.

We are currently looking for a Cybersecurity Engineer who will help us design, implement, and maintain the security foundations of our data processing platforms and the infrastructure around them. This role combines practical security engineering with hands-on research and testing. You will help define internal security standards, protect critical infrastructure, and proactively identify weaknesses in our systems before they can be exploited.

We build complex AI systems that operate on large datasets in sensitive environments. Because of that, security is not just a compliance requirement for us - it is a core engineering discipline.

What You Will Do

• Design and implement cybersecurity policies and internal security standards.
• Help maintain visibility and control over company devices, servers, and infrastructure assets.
• Build and improve systems that help prevent data leaks and unauthorized access.
• Perform internal security assessments of our products, infrastructure, and services.
• Conduct regular internal penetration testing and security audits.
• Use tools such as Nmap, Nuclei, Metasploit, and other scanning frameworks to identify vulnerabilities.
• Investigate potential attack surfaces across APIs, web applications, internal services, and infrastructure.
• Work closely with engineering teams to identify and address security issues early in the development process.
• Help implement monitoring, logging, and detection mechanisms for suspicious activity.
• Document findings, propose mitigation strategies, and support teams in implementing fixes.

What You Need to Join Us

• Strong practical understanding of cybersecurity principles and modern attack vectors.
• Hands-on experience with security testing tools such as Nmap, Nuclei, Metasploit, or similar frameworks.
• Strong understanding of network security, web application security, and infrastructure security.
• Experience conducting penetration tests or security research.
• Familiarity with Linux systems and common server environments.
• Ability to analyze systems and identify weaknesses in architecture or implementation.
• Curiosity, persistence, and a strong desire to understand how systems fail.
• Ability to configure and maintain system-level firewalls (for example, iptables, nftables, or ufw) and enforce network-level access policies.
• Experience configuring and operating Web Application Firewalls (WAFs) such as Cloudflare WAF, ModSecurity, or similar solutions to protect APIs and web services.
• Strong practical understanding of how the Internet works, including DNS, TLS, HTTP, and common attack vectors affecting networked systems.
• Solid knowledge of networking fundamentals, including TCP/IP, routing, NAT, VLANs, and the OSI model.
• Ability to analyze traffic flows, understand how packets move through networks, and diagnose connectivity or security issues across different layers of the network stack.

Relevant certifications such as OSCP, CEH, Security+, or similar are welcome, but real-world experience and demonstrated skills matter more.

Who We Are Looking For

Not looking for someone whose experience is centered primarily on managing large security teams or producing compliance documentation.

Instead, we are looking for highly motivated engineers and curious security-minded builders who enjoy exploring systems, testing assumptions, finding weaknesses in creative ways, and building stronger defenses as a result. Unusual backgrounds, unconventional experience, and self-driven experimentation can be a better fit for this role than a traditional career path.

Why Join Us

• Work on real-world systems operating in high-stakes environments.
• Help secure AI platforms and data infrastructure used in complex operational scenarios.
• Military deferment is available for full-time employees.
• Flexible work format in a results-driven environment.

–––––––––––––––––––––––––––––––Рідною–––––––––––––––––––––––––––––––

Cyber Harbor - українська компанія, заснована інженерами та дослідниками, які брали участь у захисті критичної кіберінфраструктури під час війни. Ми спираємося на реальний практичний досвід і створюємо AI-powered системи для складних середовищ, де помилка може мати високу ціну.

Зараз ми шукаємо Cybersecurity Engineer, який допоможе нам будувати, впроваджувати та підтримувати базові елементи безпеки наших платформ для обробки даних і пов’язаної з ними інфраструктури. Ця роль поєднує практичну security engineering роботу з hands-on дослідженням і тестуванням. Ви допомагатимете формувати внутрішні стандарти безпеки, захищати критичну інфраструктуру та проактивно виявляти слабкі місця в наших системах до того, як ними зможуть скористатися.

Ми створюємо складні AI systems, що працюють із великими обсягами даних у чутливих середовищах. Саме тому для нас безпека - це не просто вимога комплаєнсу, а повноцінна інженерна дисципліна.

Що ви будете робити

• Проєктувати та впроваджувати політики кібербезпеки й внутрішні стандарти безпеки.
• Допомагати підтримувати контроль і прозорість щодо корпоративних пристроїв, серверів та інфраструктурних активів.
• Будувати та вдосконалювати рішення, що знижують ризик витоку даних і несанкціонованого доступу.
• Проводити внутрішні security assessments наших продуктів, інфраструктури та сервісів.
• Регулярно проводити внутрішні penetration tests і security audits.
• Використовувати такі інструменти, як Nmap, Nuclei, Metasploit та інші scanning frameworks, для виявлення вразливостей.
• Аналізувати потенційні attack surfaces на рівні APIs, web applications, внутрішніх сервісів та інфраструктури.
• Тісно взаємодіяти з engineering teams, щоб виявляти й закривати security issues ще на ранніх етапах розробки.
• Допомагати впроваджувати механізми моніторингу, логування та виявлення підозрілої активності.
• Документувати результати, пропонувати mitigation strategies і допомагати командам впроваджувати необхідні виправлення.

Що нам важливо

• Сильне практичне розуміння принципів кібербезпеки та сучасних attack vectors.
• Hands-on досвід роботи з інструментами security testing, такими як Nmap, Nuclei, Metasploit або подібними frameworks.
• Сильне розуміння network security, web application security та infrastructure security.
• Досвід проведення penetration tests або security research.
• Знайомство з Linux-системами та типовими серверними середовищами.
• Вміння аналізувати системи та виявляти слабкі місця в архітектурі або реалізації.
• Допитливість, наполегливість і сильна внутрішня мотивація розуміти, як саме системи дають збій.
• Вміння налаштовувати та підтримувати system-level firewalls (наприклад, iptables, nftables або ufw) і забезпечувати мережеві політики доступу.
• Досвід налаштування та експлуатації Web Application Firewalls (WAFs), таких як Cloudflare WAF, ModSecurity або подібних рішень, для захисту APIs і web services.
• Сильне практичне розуміння того, як у реальності працює Інтернет, зокрема DNS, TLS, HTTP та типові attack vectors, що впливають на мережеві системи.
• Ґрунтовні знання мережевих основ, зокрема TCP/IP, routing, NAT, VLANs і моделі OSI.
• Вміння аналізувати traffic flows, розуміти, як пакети проходять через мережу, та діагностувати проблеми зі з’єднанням або безпекою на різних рівнях network stack.

Профільні сертифікації, такі як OSCP, CEH, Security+ або подібні, будуть плюсом, але для нас важливішими є реальний практичний досвід і підтверджені навички.

Кого ми шукаємо

Не шукаємо людину, чий досвід зосереджений переважно на управлінні великими security teams або підготовці compliance documentation.

Натомість ми шукаємо сильних, мотивованих інженерів і допитливих security-minded фахівців, яким цікаво досліджувати системи, перевіряти припущення, нестандартно шукати слабкі місця й на цій основі будувати сильніший захист. Незвичний бекграунд, нетиповий досвід і self-driven експерименти можуть підійти для цієї ролі краще, ніж класичний кар’єрний шлях.

Чому варто приєднатися

• Працювати з реальними системами, що функціонують у середовищах із високою ціною помилки.
• Допомагати захищати AI platforms та data infrastructure, які використовуються в складних операційних сценаріях.
• Бронювання доступне для full-time працівників.
• Гнучкий формат роботи в середовищі з фокусом на результат.

We are looking for a specialist who will be responsible for the development and maintenance of a complex AI-powered search system built on top of a large interactive knowledge base. The system includes tool calling and agentic behavior that interact with internal tools and multiple types of storage: vector databases for semantic search, document-oriented databases for full-text search, as well as relational and graph databases for lookup by specific identifiers. The search interface is built as an LLM-powered chat that supports natural language queries and returns well-grounded conclusions, recommendations, and links to primary sources.

The candidate will be responsible for designing and implementing the full LLM-powered search pipeline, including orchestration, reasoning, reranking, tool calling, handling tool outputs, validating results, and generating final user-facing responses.

We expect the candidate to:

• Have hands-on commercial experience working with vLLM in self-hosted environments, including model optimization on H100/H200 GPUs, with a solid understanding of GPU architecture principles and cache behavior under production workloads.
• Have a deep understanding of the RAG concept and a proven track record of successfully deploying similar solutions in production.
• Have worked with Haystack, LlamaIndex, LangChain, or similar frameworks, and understand the core differences between them.
• Have experience using MCP and working with LLMs that call external tools and services.
• Have strong Python skills, including architectural principles, design patterns, multithreading, asynchronous programming, modern testing practices, and experience operating systems under load (monitoring, memory optimization, telemetry).
• Have experience working with document-oriented, relational, and vector databases, including an understanding of index types and the appropriate use cases for each.

It would be a plus if you have:

• Experience building or maintaining knowledge bases, AI-powered reporting systems, or chatbots with large context windows.
• Experience training or fine-tuning LLMs or compact models for domain-specific tasks.
• Practical DevOps experience: CI/CD, Kubernetes, Helm, ArgoCD.
• Experience developing OCR- and Vision-Language-based systems for processing unstructured data.
• Experience in data engineering: understanding of ETL/ELT processes, working with orchestrators (Airflow, Temporal, Prefect), and distributed computing systems (Ray, Spark).
• Experience working with Elasticsearch, MongoDB, PostgreSQL, Qdrant/Milvus, Neo4j, and other database systems.
• Understanding of cybersecurity processes and modern approaches to data protection.

We offer a fully remote work format on our own product, which uses state-of-the-art technologies and is focused on the public sector. The company has the status of being critically important to the Armed Forces of Ukraine. If needed, we provide military deferment and the necessary office equipment.

––––––––––––––––––––––––––––Українською––––––––––––––––––––––––––––

Шукаємо фахівця, який буде відповідати за розробку та супровід комплексної AI-powered пошукової системи на основі великої інтерактивної бази знань. У системі реалізовано tool calling та agentic behaviour, що працюють із внутрішніми інструментами та різними типами сховищ: векторними базами для семантичного пошуку, документоорієнтованими для повнотекстового пошуку, а також реляційними та графовими базами для пошуку за конкретними ідентифікаторами. Інтерфейс пошуку побудовано у форматі LLM-powered чату, який підтримує запити natural language і повертає аргументовані висновки, рекомендації та посилання на першоджерела. 

У зону відповідальності кандидата входитиме проєктування та впровадження повного пайплайну LLM-powered пошуку, включно з orchestration, reasoning, reranking, tool calling, обробкою відповідей інструментів, валідацією результатів та формуванням фінальних відповідей для користувача. 

Ми очікуємо, що кандидат: 

• Має практичний комерційний досвід роботи з vLLM у self-hosted середовищах, включно з оптимізацією моделей на GPU H100/200, розумінням принципів GPU-архітектур та поведінки кешу під продакшн-навантаженням. 
• Глибоко розуміє концепцію RAG та має досвід успішного впровадження подібних рішень у продакшені. 
• Працював з Haystack / LlamaIndex / LangChain або аналогічними фреймворками та орієнтується в принципових відмінностях між ними. 
• Має досвід використання MCP та роботи з LLM, які викликають зовнішні інструменти й сервіси. 
• Володіє Python на високому рівні: архітектурні принципи, шаблони проєктування, багатопоточність, асинхронність, сучасні практики тестування, а також досвід експлуатації систем під навантаженням (моніторинг, оптимізація пам'яті, телеметрія). 

• Має досвід роботи з документоорієнтованими, реляційними та векторними базами даних, включно з розумінням типів індексів і відповідних сценаріїв застосування. 

   

Буде плюсом: 

• Досвід створення або підтримки баз знань, систем генерації звітів на базі AI, розробка чатботів із великим контекстним вікном.
• Досвід навчання або fine-tuning LLM чи компактних моделей для специфічних задач. 
• Практичний досвід у DevOps: CI/CD, Kubernetes, Helm, ArgoCD. 
• Досвід розробки систем на основі OCR та Vision-Language моделей для обробки неструктурованих даних. 
• Досвід у data engineering: розуміння ETL/ELT-процесів, робота з оркестраторами (Airflow, Temporal, Prefect) та системами розподіленого обчислення (Ray.io, Spark). 
• Досвід роботи з Elasticsearch, MongoDB, PostgreSQL, Qdrant/Milvus, Neo4j та іншими СУБД. 
• Розуміння процесів кібербезпеки та сучасних підходів до захисту даних. 
   

Пропонуємо повністю віддалений формат роботи над власним продуктом, який використовує найсучасніші технології та орієнтований на державний сектор. Компанія має статус критично важливої для Збройних сил України. За потреби надаємо бронювання та необхідну офісну техніку.

Our company is developing its own interactive knowledge base. Users can upload any volume of diverse data, after which the system automatically transforms it into structured, searchable content. To achieve this, we use a comprehensive ML pipeline involving OCR, vision-language models, document parsers, and multiple types of data storage. Search is implemented through an LLM-based chat interface that allows users to submit queries in natural language, retrieve relevant documents, and receive summarized findings and recommendations based on the uploaded materials.

We are currently looking for an ML/AI Engineer with deep experience working with unstructured content - primarily photographs and scanned document copies - who will strengthen our team and lead the development of pipelines and solutions for processing this type of data.

We expect the candidate to:

• Have broad experience working with unstructured data and have used both classical OCR systems (Tesseract, PaddleOCR, EasyOCR) and modern models (PaddleOCR-VL, DeepSeek-OCR, dots.ocr, Qwen3-VL). Understand the strengths and weaknesses of different architectures and the scenarios in which each is most effective.
• Have hands-on experience training and fine-tuning OCR and Vision-Language models.
• Understand algorithmic approaches to image enhancement, preprocessing, and filtering in order to improve downstream recognition quality.
• Have worked with Docling (including advanced backend tuning for parsing complex PDFs and tables), markitdown, Apache Tika, PyMuPDF, and other tools for document conversion and structuring. Be comfortable with processing layered and non-trivial PDF files.
• Have experience working with self-hosted models, including deploying and optimizing models in vLLM environments on H100-class GPUs and above, and understand the principles of GPU architecture and KV cache.
• Have strong Python programming skills, including architectural patterns, multithreading, asynchronous programming, modern testing practices, and experience operating services under high load (monitoring, telemetry, memory utilization).
• Have experience working with document-oriented, relational, and vector databases, and understand index types and the relevant use cases for each type of storage.

It would be a plus if you have:

• Experience working with Speech-to-Text or Video-to-Text pipelines.
• Experience in content analysis, including classification, summarization, and NER.
• Experience in data engineering: understanding of ETL/ELT processes, experience with orchestrators (Airflow, Temporal, Prefect), and distributed computing systems (Ray, Spark).
• Experience in DevOps: CI/CD, Kubernetes, Helm, ArgoCD.
• Experience working with Elasticsearch, MongoDB, PostgreSQL, Qdrant/Milvus, Neo4j, and other storage systems.
• Understanding of modern cybersecurity approaches.
• Hands-on experience with production-grade RAG-based systems.

We offer a fully remote work format on our own product, which uses state-of-the-art technologies and is focused on the public sector. The company has the status of being critically important to the Armed Forces of Ukraine. If needed, we provide military deferment and the necessary office equipment.

–––––––––––––––––––––––––––––Українською–––––––––––––––––––––––––––––

Наша компанія розробляє власну інтерактивну базу знань. Користувачі можуть завантажувати будь-який обсяг різноманітних даних, після чого система автоматично перетворює їх на структурований, придатний для пошуку контент. Для цього застосовується комплексний ML-пайплайн із залученням OCR, VL моделей, документних парсерів та різних типів сховищ даних. Пошук реалізовано через чат на базі LLM, який дозволяє формувати запити звичайною мовою, отримувати релевантні документи, а також узагальнені висновки та рекомендації на основі завантажених матеріалів. 

Зараз ми шукаємо ML/AI інженера з глибоким досвідом роботи з неструктурованим контентом (насамперед фотографіями та скан-копіями документів), який підсилить нашу команду та очолить напрям розробки пайплайнів і рішень для обробки таких даних. 

Ми очікуємо, що кандидат: 
• Має широкий досвід роботи з неструктурованими даними та застосовував як класичні OCR-системи (Tesseract, PaddleOCR, EasyOCR), так і сучасні моделі (PaddleOCR-VL, DeepSeek-OCR, dots.ocr, Qwen3-VL). Розуміє сильні та слабкі сторони різних архітектур і сценарії їх застосування. 
• Має практичний досвід навчання та fine-tuning OCR і Vision-Language моделей. 
• Розуміє алгоритмічні методи покращення зображень, їх попередню фільтрацію та обробку для підвищення якості подальшого розпізнавання. 
• Працював з Docling (включно з тонким налаштуванням бекендів для парсингу складних PDF і таблиць), markitdown, Apache Tika, PyMuPDF та іншими інструментами для конвертації й структуризації документів. Орієнтується у процесингу багатошарових і нетривіальних PDF-файлів. 
• Має досвід роботи з self-hosted моделями, зокрема запуску та оптимізації моделей у середовищах vLLM на GPU рівня H100 і вище, розуміє принципи GPU-архітектури та KV cache. 
• Має сильні навички програмування на Python: архітектурні патерни, багатопоточність, асинхронність, сучасні практики тестування, досвід експлуатації сервісів під високим навантаженням (моніторинг, телеметрія, утилізація пам'яті). 
• Має досвід роботи з документоорієнтованими, реляційними та векторними базами даних, розуміє типи індексів і відповідні юзкейси для кожного типу сховищ. 

Буде плюсом: 
• Досвід роботи з Speech-to-text або Video-to-text пайплайнами.
• Досвід аналізу контенту: класифікація, сумаризація, NER. 
• Досвід у data engineering: розуміння ETL/ELT-процесів, робота з оркестраторами (Airflow, Temporal, Prefect) та системами розподіленого обчислення (Ray.io, Spark). 
• Досвід у DevOps: CI/CD, Kubernetes, Helm, ArgoCD. 
• Досвід роботи з Elasticsearch, MongoDB, PostgreSQL, Qdrant/Milvus, Neo4j та іншими сховищами. 
• Розуміння сучасних підходів до кібербезпеки. 
• Практичний досвід із системами на основі RAG у продакшені. 

Пропонуємо повністю віддалений формат роботи над власним продуктом, який використовує найсучасніші технології та орієнтований на державний сектор. Компанія має статус критично важливої для Збройних сил України. За потреби надаємо бронювання та необхідну офісну техніку.

Cyber Harbor is a fast-growing Ukraine-based company founded by engineers and researchers who helped defend critical cyber infrastructure during the war. Our work is shaped by real-world experience, and we build AI-powered systems designed to handle complex, high-stakes environments.

We are currently expanding and looking for a strong Data Engineer to help us design and build scalable pipelines for processing large volumes of both structured and unstructured data. These pipelines power comprehensive, interactive knowledge bases used in real-world operations. 

In this role, you will work closely with the core data processing workflows and collaborate daily with software engineers, AI/ML engineers, DevOps specialists, and the QA team. Because much of the work happens across different parts of the system, strong communication and the ability to collaborate effectively with other teams are essential.

What You Will Do

- Design and build ETL/ELT pipelines for large volumes of unstructured data using orchestrators such as Temporal, Prefect, Celery, or Airflow, along with distributed processing engines like Ray and Spark.
- Automate AI-related tasks including text extraction, summarization, OCR, named entity recognition, and embedding generation using various self-hosted models, including some developed in-house.
- Design data schemas and manage storage across multiple systems, including relational databases (PostgreSQL), NoSQL databases (Elasticsearch, Mongodb), vector search engines (Qdrant, Milvus), and graph databases (Neo4j).
- Set up and maintain messaging queues for distributed data processing using tools such as Kafka, RabbitMQ.
- Develop custom Python tools and logic to ensure high throughput, reliability, and fault tolerance in data pipelines.
- Containerize services with Docker and orchestrate deployments using Kubernetes, including on-premise environments.
- Build and maintain CI/CD pipelines to support reliable development and deployment workflows.
- Monitor infrastructure and pipeline health using Prometheus and Grafana, and manage centralized logging with the ELK Stack.

What You Need to Join Us

- Strong hands-on experience with SELF-HOSTED data engineering tools.
- Solid Python skills and the ability to build reliable, production-grade data workflows.
- Experience automating workflows that involve different AI models, including self-hosted ones.
- Good understanding of how modern search and RAG systems are designed and operate.
- Familiarity with messaging systems such as Apache Kafka, RabbitMQ.
- Strong understanding of relational databases (PostgreSQL) as well as other data systems such as Elasticsearch, Qdrant/Milvus, and Neo4j.
- Practical experience with Docker, Kubernetes, and CI/CD tools (GitHub Actions or GitLab CI).
- Familiarity with monitoring and observability tools such as Prometheus, Grafana, and the ELK Stack.
- Experience working with on-premise infrastructure environments.

Why Join Us

- Make a Real Impact: Our systems have already been validated in real-world, nation-state level operations.
- Right Place, Right Time: Work at the intersection of AI, large-scale data processing, and cybersecurity.
- Military Deferment: Available for full-time employees.
- Flexible Schedule: Remote-friendly environment focused on results rather than rigid hours.

–––––––––––––––––––––––––––––––Рідною–––––––––––––––––––––––––––––––

Cyber Harbor - українська компанія, заснована інженерами та дослідниками, які брали участь у захисті критичної кіберінфраструктури під час війни. Ми спираємося на реальний практичний досвід і створюємо AI-powered системи для складних середовищ, де помилка може мати високу ціну.

Зараз ми розширюємо команду та шукаємо сильного Data Engineer, який допоможе нам проєктувати й розвивати масштабовані пайплайни для обробки великих обсягів структурованих і неструктурованих даних. Саме ці пайплайни є основою комплексних інтерактивних баз знань, що використовуються в реальних операційних процесах.

У цій ролі ви працюватимете з ключовими процесами обробки даних та щодня взаємодіятимете з software engineers, AI/ML engineers, DevOps specialists і QA командою. Значна частина задач лежить на стику кількох компонентів системи, тому для нас важливі сильні комунікаційні навички та вміння ефективно працювати з різними командами.

Що ви будете робити

• Проєктувати та розробляти ETL/ELT-пайплайни для обробки великих обсягів неструктурованих даних із використанням інструментів оркестрації, таких як Temporal, Prefect, Celery або Airflow, а також систем розподіленої обробки, зокрема Ray і Spark.
• Автоматизувати AI-related задачі, зокрема text extraction, summarization, OCR, named entity recognition та генерацію embeddings, використовуючи різні self-hosted моделі, у тому числі частково розроблені in-house.
• Проєктувати схеми даних і будувати логіку зберігання в кількох системах одночасно: реляційних базах даних (PostgreSQL), NoSQL-рішеннях (Elasticsearch, MongoDB), векторних пошукових системах (Qdrant, Milvus) і графових базах даних (Neo4j).
• Налаштовувати та підтримувати черги повідомлень для розподіленої обробки даних за допомогою таких інструментів, як Kafka та RabbitMQ.
• Розробляти кастомні Python-інструменти й внутрішню логіку, що забезпечують високу пропускну здатність, надійність і відмовостійкість data pipelines.
• Контейнеризувати сервіси за допомогою Docker та керувати розгортанням через Kubernetes, зокрема в on-premise середовищах.
• Будувати й підтримувати CI/CD pipelines для стабільних і передбачуваних процесів розробки та деплою.
• Відстежувати стан інфраструктури та пайплайнів за допомогою Prometheus і Grafana, а також підтримувати централізоване логування через ELK Stack.
   

Що нам важливо

• Сильний практичний досвід роботи з self-hosted інструментами для data engineering.
• Впевнене володіння Python і вміння будувати надійні data workflows production-рівня.
• Досвід автоматизації процесів, що включають роботу з різними AI-моделями, зокрема self-hosted.
• Розуміння принципів побудови та роботи сучасних search і RAG systems.
• Практичний досвід роботи з системами обміну повідомленнями, зокрема Apache Kafka та RabbitMQ.
• Сильне розуміння реляційних баз даних (PostgreSQL), а також інших систем зберігання й пошуку даних, зокрема Elasticsearch, Qdrant/Milvus і Neo4j.
• Практичний досвід роботи з Docker, Kubernetes і CI/CD-інструментами (GitHub Actions або GitLab CI).
• Знайомство з інструментами моніторингу та observability, такими як Prometheus, Grafana й ELK Stack.
• Досвід роботи з on-premise інфраструктурою.

Чому варто приєднатися

• Реальний вплив - наші системи вже використовуються в реальних операційних умовах.
• Сильний технічний контекст - ви працюватимете на перетині AI, обробки великих даних і кібербезпеки.
• Бронювання - доступне для full-time працівників.
• Гнучкий формат роботи - remote-friendly середовище з фокусом на результат, а не на формальний графік.

Responsibilities:

• Own and support core ML infrastructure (MLflow, CVAT, GPU/CPU cloud instances, internal data tools).
• Assist Data Engineers with deploying and maintaining data pipelines.
• Act as the primary contact for ML and Data teams on infra-related requests.
• Improve reliability and efficiency by adding automation, monitoring, and tooling enhancements.
   

Must have:

• Knowledge of Python, Terraform, Docker, Linux.
• Hands-on experience with cloud environments (Azure prefered).
• Understanding of the end-to-end ML lifecycle (data → training → evaluation → deployment → monitoring).

Nice to have:

• Familiarity with Kubernetes.
• Experience with FFmpeg or GStreamer for video processing and streaming.
• Experience with model serving frameworks and inference formats (ONNX, TensorRT, OpenVINO, NVIDIA Triton).
• Experience deploying computer vision models, especially to edge/embedded devices (NVIDIA Jetson, Intel platforms, Raspberry Pi).

• Надаємо бронювання від мобілізації

Основні обов’язки
 

• L1 підтримка користувачів Jira, JSM, Confluence та SharePoint.
• Обробка та вирішення типових запитів та інцидентів користувачів.
• Базове адміністрування: користувачі, групи, доступи та permissions.
• Допомога з Jira projects, boards, filters, dashboards та JSM requests.
• Підтримка SharePoint sites, lists, libraries та доступів.
• Первинна діагностика проблем та збір необхідної інформації.
• Ескалація складних проблем до L2/L3 команд.
• Ведення та актуалізація інструкцій і бази знань.
   

Основні вимоги
 

• Базове розуміння Jira / Jira Service Management / Confluence.
• Базові знання SharePoint Online / Microsoft 365.
• Розуміння принципів роботи користувачів, груп, ролей та permissions.
• Розуміння основ ITSM / Service Desk та роботи з заявками.
• Хороші навички troubleshooting та пошуку причин проблем.
• Вміння чітко комунікувати з користувачами та пояснювати технічні речі простою мовою.
• Англійська на рівні, достатньому для роботи з технічною документацією.
   

Буде перевагою
 

• Досвід роботи в L1/L2 Service Desk.
• Досвід із Microsoft Entra ID.
• Базове знання JQL.
• Досвід роботи з Power Automate / Power Platform.
• Досвід адміністрування Atlassian Cloud або Microsoft 365.

We are looking for an Application Security Engineer to help build security into the software development lifecycle across our products and platforms.

In this role, you will work closely with Engineering, DevOps, Architecture, and Security teams to integrate security controls into development processes, identify risks early, and help teams build secure solutions without unnecessary bureaucracy.
 

Responsibilities

• Define and validate security requirements for applications, APIs, integrations, and new services.
• Participate in architecture and design reviews to identify security risks at early stages.
• Build and improve Secure Software Development Lifecycle (SSDLC) practices.
• Integrate security controls into CI/CD pipelines, including SAST, DAST, SCA, Secret Scanning, Container and IaC Scanning.
• Perform security assessments of web applications, APIs, backend services, and AI-driven solutions.
• Support development teams with remediation activities, secure coding practices, and security best practices.
• Develop security standards, baselines, templates, and engineering guidelines.
   

Requirements

• 2+ years of experience in Application Security, DevSecOps, Security Engineering, or a similar role.
• Strong understanding of SSDLC and secure development practices.
• Hands-on experience with SAST, DAST, SCA, threat modeling, and security reviews.
• Good knowledge of OWASP Top 10, OWASP ASVS, API Security, Authentication, Authorization, and Secure Design principles.
• Experience integrating security controls into CI/CD pipelines.
• Familiarity with container security and Kubernetes environments.
• Experience with Infrastructure as Code security (Terraform is a plus).
• Scripting skills in Python and/or PowerShell.
• Understanding of software supply chain security and dependency management.
• Strong communication skills and ability to work effectively with engineering teams.
   

Nice to Have

• Experience with Bug Bounty programs or CTFs.
• Experience securing AI/ML systems and services.
• Experience with Azure, AKS, GitHub Enterprise, Checkmarx, Trivy, or similar tooling.

Bavovna Defence is a company operating in the miltech sector, specializing in the development of electronic devices for the frontlines. Our products include munition drop controllers, remote detonation systems, target tracking systems, communication systems, and more.

For the past 3.5 years, we have been fully dedicating ourselves and our work to bringing Ukraine’s victory closer and strengthening its defense capabilities.

We are not planning to stop—only to expand! That’s why we are currently looking for a skilled Hardware Engineer, whose responsibilities will include:

• Developing technological maps for the production of electronic devices.
• Designing electronic devices, as well as physical and mathematical models of systems.
• Creating physical models for simulating control systems for electronic devices and aerial vehicles in MATLAB/Simulink.

• Researching and adapting new production technologies (related to development).

   

Requirements:

• Strong knowledge of physics and mathematics.
• Experience working with safety systems.
• Understanding of analog and digital circuit design.
• Knowledge of electromagnetic compatibility (certification experience is a plus).
• Understanding of PCB manufacturing/assembly and knowledge of IPC standards.
• Experience with Git.
• Proficiency in Altium Designer / OrCad / Eagle.
• Ability to read blueprints and work with STEP models.
• Experience with SPICE simulators: LTSpice, PSpice, Multisim, Microcap, Proteus.

• English proficiency (spoken skills are preferred).

   

Bonus points for:

• Experience with BGA packages / multilayer (8+) PCBs.
• Experience with STM32 controllers / FPGA.
• Experience in RF circuit/antenna/SDR system design.
• Experience with instrumentation amplifiers.
• Experience in designing switching power supplies.
• Experience in Safety-Critical / Mission-Critical system development.

What we offer:

• Competitive salary (at or above market level, depending on technical interview results).
• Remote work format.
• Flexible schedule (we prioritize task completion within deadlines rather than fixed working hours).
• A truly friendly team of professionals and like-minded individuals who will support, assist, and eagerly share their expertise with new team members.

We look forward to having you on board! 🚀

We are looking for Talent Sourcer for an IT product company that is rapidly growing and delivering a unique, cutting-edge solution in the defense tech industry. 

Talent Sourcer will support the expansion of the company during this period of rapid growth. You will be responsible for attracting and identifying potential candidates, finding effective ways to connect with them, and continuously improving sourcing strategies and processes. 

Key Responsibilities: 

• Develop and implement effective sourcing strategies for roles across various levels. 

• Utilize a wide range of sourcing techniques, including Boolean/X-ray search on different platforms such as LinkedIn Recruiter, GitHub, social media and alternative sources. 

• Craft personalized and multi-channel outreach campaigns to increase candidate response rates and engagement. 

• Analyze sourcing data and recruitment funnel metrics, including interview conversion rates, response rates, and others. 

• Conduct market mapping and competitor research to identify talent pools and hiring trends. 

• Collaborate closely with hiring managers to ensure alignment and effectiveness in recruiting efforts. 

Skills and experience: 

• Minimum of 2 years of hands-on experience as a Sourcer. 

• Demonstrated expertise in sourcing across both technical and non-technical roles. 

• Knowledge of different sourcing tools and techniques, including Boolean search, and sourcing across various platforms (e.g., LinkedIn, GitHub, etc.). 

• Strong understanding of diverse job roles and the ability to quickly understand and adapt to new job requirements. 

• Results-oriented mindset with a proactive approach, creative problem-solving, and a high degree of flexibility. 

• Proficiency in English at an intermediate level or higher. 

• Experience sourcing candidates in the EU and USA markets will be a plus. 

What company offers: 

• A dynamic and innovative work environment that supports professional growth. 

• The opportunity to make an impact on the company’s processes and outcomes. 

• Work with Ashby ATS and the latest sourcing tools. 

• Competitive salary, official employment, employee military deferral (if applicable), and stable working conditions. 

• Flexible working arrangements (office / hybrid, flexible working hours). 

• A chance to contribute to the development of a cutting-edge and fast-moving product. 

If you're passionate about identifying top talent and enjoy using innovative sourcing strategies to find the perfect fit, we'd love to hear from you!

We are looking for a Project Manager to lead UAV projects from concept to deployment, working with complex hardware and software systems.

In this role, you will work closely with engineering and product teams, as well as external partners, making sure projects move forward smoothly and solutions are delivered in line with technical requirements and real-world constraints.

Responsibilities

• Plan and manage projects end-to-end, defining scope, timelines, and key deliverables, while keeping track of dependencies between hardware and software
• Coordinate engineering, product, and partner teams, ensuring alignment and steady progress
• Identify risks early and address issues before they impact delivery
• Work with partners, clients, and institutional stakeholders, providing updates and resolving issues as they arise
• Manage budgets and resources, ensuring efficient use and alignment with project goals
• Support the transition from prototype to deployment together with hardware and manufacturing partners
• Oversee testing, validate system performance, and ensure solutions meet quality and operational requirements
• Review results, identify improvements, and work with engineering teams to implement them
• Maintain clear and structured project documentation
• Support rollout and scaling of solutions in operational environments

Requirements

• 3+ years of experience as a Project Manager
• Experience working with hardware systems or complex technical products(preferably UAV / UAS or miltech projects)
• Understanding of how products move from development to deployment
• Experience working with cross-functional teams in engineering environments
• Ability to work with complex systems, dependencies, and uncertainty
• Experience in risk management and problem-solving
• Strong communication skills and ability to align different stakeholders
• Experience working with partners, clients, or institutional stakeholders
• Understanding of testing and quality assurance processes
• Experience working with hardware partners and product delivery
• Proficiency with project management tools
• Upper-Intermediate (B2+) level of English or higher

Will be a plus

• Experience in defense or miltech projects
• Understanding of regulatory or certification requirements

We Offer

• Official employment under Ukrainian labor law
• Military reservation
• Medical insurance
• Individual English lessons
• Stock Options

We are looking for a Head of Electronics Department - a leader responsible for the organization and outcome of the company's electronic product development process: from the requirements of the technical specifications to a finished, stable product suitable for serial production and operation in combat conditions.
 

This role is about managing the engineering team, processes and quality of solutions, with a deep understanding of the specifics of electronic development at MilTech.
 

The Head of Electronics Department is responsible for the coordinated work and development of the team, which includes: circuit engineers, PCB development and tracing specialists, embedded developers.
 

Main tasks:
 

- Organization of the electronics development process in accordance with the requirements of the technical specifications: from the formation of architecture and technical solutions to the validation of the finished product.
- Management of the life cycle of the electronic part of the product: prototype → testing → refinement → serial product.
- Work planning, prioritization of tasks, control of deadlines and quality of execution.
- Ensuring effective interaction between circuit engineers, PCB engineers and embedded developers.
- Coordination with related departments: R&D, production, testing, service, combat readiness.
- Monitoring compliance of developments with production, operation and maintainability requirements.
- Analysis of technical risks and decision-making on their minimization.
- Implementation and improvement of development standards, documentation and internal processes.
- Team development: mentoring, competency assessment, development plan formation, improvement of technical culture.
- Formation of an environment of responsibility for the result, not only for the performance of tasks.

Our expectations: 
 

- Higher technical education (electronics, radio engineering, embedded systems or related areas).
- Experience in electronic development (hardware / embedded) and understanding of the full product development cycle.
- Experience in managing an engineering team or willingness to take on a leadership role.
- Understanding of processes: circuit design, PCB development and tracing, embedded development, electronics integration and testing.
- Ability to work with technical specifications, transform requirements into realistic technical solutions and plans.
- System thinking, responsibility, ability to make decisions under uncertainty.
- Strong communication skills and ability to work with different stakeholders.
- Experience in MilTech / Defense or related areas will be an advantage.

We offer: 
 

- Official employment from the first working day in accordance with the labor legislation of Ukraine: you can work calmly and be calm about vacation, sick leave and social contributions. Your present and future are protected.
- Competitive remuneration: a transparent system of reviews and tracking market dynamics allows us to maintain a fair level of remuneration.
- Career growth and professional development system: you can develop both horizontally and vertically in the structure. The company is interested in long-term cooperation and professional development of employees.
- Work in a dynamic team with advanced technologies: the company works in a cutting-edge field and our results tomorrow are ensured by our dynamics today.
- Medical insurance: our people are our value, so we invest in their physical and mental health. 100% compensation.
- English language improvement courses: regardless of your current level of English, you can improve or maintain your current level. 100% compensation.
- Relocation package for a safe and comfortable move to Kyiv: you will have a budget, a good realtor and support for moving from the HR team.
- Booking: the registration procedure works from the first working day.
- Office work format: a comfortable office with shelter and walking distance from the metro.

We are looking for a Senior Solution Engineer to join our team and support the successful integration and deployment of autonomous systems.
 

In this role, you will serve as the primary technical interface for partners, helping them integrate and deploy software and hardware solutions into their platforms. You will work closely with partners to understand their technical requirements, configure and adapt existing solutions, contribute to software development, and ensure successful implementation.
 

You will collaborate with cross-functional engineering teams to solve complex technical challenges, support product improvements, and help deliver reliable, high-quality solutions. This role is ideal for an engineer who enjoys combining hands-on technical work with customer collaboration and system-level problem solving.
 

Responsibilities:

• Serve as the primary technical point of contact for partners throughout integration and deployment projects
• Integrate partner systems with software and hardware solutions both remotely and on-site
• Configure, customize, and adapt existing solutions to meet partner requirements
• Contribute to the development of software solutions, from standalone applications and plugins to the main software codebase
• Manage software releases, including build preparation, release creation, testing, and resolving release-related issues
• Validate software releases before they are delivered to operational teams
• Collaborate with product and engineering teams to deliver new features and improvements
• Translate partner requirements into clear technical specifications aligned with product capabilities
• Troubleshoot software, hardware, and system integration issues, escalating complex challenges when required
• Support system validation, field testing, and deployment activities
• Contribute to technical documentation and continuous improvement of engineering processes
   

Requirements:

• Experience working directly with partners or customers in a technical engineering environment
• Strong proficiency in Python, C++, and Linux (Ubuntu)
• Experience integrating hardware components into embedded systems
• Basic hands-on hardware experience and understanding of fundamental electronics principles
• Solid understanding of embedded communication protocols (CAN, I2C, SPI, etc.)
• Experience with electrical and/or mechanical system design
• Ability to design wiring diagrams and apply best practices to minimize electrical interference
• Understanding of control theory and flight control
• Hands-on experience with multicopter and fixed-wing UAVs
• Strong analytical, troubleshooting, and problem-solving skills
• Excellent communication skills and the ability to collaborate effectively with cross-functional teams
• Willingness to travel for on-site integration, testing, and deployment activities
   

We Offer:

• Official employment under Ukrainian labor law
• Military booking
• Medical insurance
• Individual English lessons
• Stock Options
• Opportunity to work on cutting-edge UAV systems and grow professionally

Complete interview process:

• Intro call with recruiter → HR interview → Technical interview → Final interview with the team's leadership → Pre-offer → Security check

We are looking for a Middle Solution Engineer to join our team and support the successful integration and deployment of autonomous systems.
 

In this role, you will serve as the primary technical interface for partners, helping them integrate and deploy software and hardware solutions into their platforms. You will work closely with partners to understand their technical requirements, configure and adapt existing solutions, contribute to software development, and ensure successful implementation.
 

You will collaborate with cross-functional engineering teams to solve complex technical challenges, support product improvements, and help deliver reliable, high-quality solutions. This role is ideal for an engineer who enjoys combining hands-on technical work with customer collaboration and system-level problem solving.
 

Responsibilities:

• Serve as the primary technical point of contact for partners throughout integration and deployment projects
• Integrate partner systems with software and hardware solutions both remotely and on-site
• Configure, customize, and adapt existing solutions to meet partner requirements
• Contribute to the development of software solutions, from standalone applications and plugins to the main software codebase
• Manage software releases, including build preparation, release creation, testing, and resolving release-related issues
• Validate software releases before they are delivered to operational teams
• Collaborate with product and engineering teams to deliver new features and improvements
• Translate partner requirements into clear technical specifications aligned with product capabilities
• Troubleshoot software, hardware, and system integration issues, escalating complex challenges when required
• Support system validation, field testing, and deployment activities
• Contribute to technical documentation and continuous improvement of engineering processes
   

Requirements:

• Hands-on experience with C++ and Python and comfortable working in Linux (Ubuntu)
• Experience with embedded systems, robotics, UAVs, or other autonomous systems
• Experience working with real hardware and integrating software with hardware components
• Understanding of common embedded communication protocols such as CAN, I2C, SPI, UART
• Experience with system integration, testing, debugging, and troubleshooting
• Basic understanding of electronics and system-level interactions
• Strong analytical and problem-solving skills
• Ability to work independently, take responsibility for tasks, and drive them to completion
• Good communication skills and ability to collaborate effectively with engineers and other teams
• Willingness to travel for on-site integration, testing, and deployment activities
   

We Offer:

• Official employment under Ukrainian labor law
• Military booking
• Medical insurance
• Individual English lessons
• Stock Options
• Opportunity to work on cutting-edge UAV systems and grow professionally

Interview process:

• Intro call with recruiter → HR interview → Technical interview → Final interview with the team's leadership → Pre-offer → Security check

We are looking for a GNC Engineer to join our team and contribute to the development of guidance, navigation, and control software for autonomous robotic systems.

In this role, you will work on the core flight software responsible for vehicle guidance, navigation, and control, with a primary focus on unmanned aerial systems. You will collaborate closely with cross-functional engineering teams to develop new capabilities, integrate software with new hardware platforms, improve system performance, and investigate real-world operational issues.

This is an opportunity to work on mission-critical autonomous systems, solving complex engineering challenges at the intersection of robotics, embedded software, and flight control.

Responsibilities:

• Design, develop, and maintain Guidance, Navigation & Control (GNC) software for autonomous systems
• Develop new features and improve existing functionality within the PX4 Autopilot ecosystem
• Design and implement reliable, high-quality onboard software in C++
• Collaborate with cross-functional engineering teams to integrate software with new platforms
• Analyze UAV flight logs to identify anomalies, evaluate vehicle behavior, troubleshoot system issues, and determine root causes
• Tune UAV Guidance, Navigation & Control (GNC) parameters to achieve the desired flight characteristics
• Develop automated tests to ensure software reliability and performance
• Support system integration, validation, and field testing activities when required 
• Contribute to software architecture, code reviews, and continuous improvement of development practices

 Requirements:

• Strong understanding of flight dynamics, control systems, and aerodynamics
• Solid experience with C/C++, preferably in Linux-based embedded environments
• Experience with PX4 Autopilot or a comparable autopilot platform
• Experience developing robotic applications using ROS/ROS2
• Understanding of state estimation techniques, including Kalman filtering
• Experience analyzing flight data and troubleshooting autonomous systems
• Strong problem-solving and analytical skills
• Excellent communication skills and the ability to collaborate effectively within distributed engineering teams
• Strong English communication skills (Upper-Intermediate/B2 or higher)

Will be a plus:

• Experience with Python
• Hands-on drone experience, including piloting
• Experience with hardware integration and field testing

We Offer:

• Official employment under Ukrainian labor law
• Military booking
• Medical insurance
• Individual English lessons
• Stock Options
• Opportunity to work on cutting-edge UAV systems and grow professionally

Complete interview process:

• Intro call with recruiter → HR interview → Technical interview → Final interview with the team's leadership → Pre-offer → Security check

The Fourth Law is a leading Ukrainian manufacturer of autonomy technologies for drones. Our solutions are codified according to NATO standards and are currently utilized by over 50 units of the Security and Defense Forces of Ukraine, as well as 20+ drone manufacturers.

Our products are named after prominent Ukrainian figures of the "Executed Renaissance" and the "Sixtiers" movement—Vasyl Stus, Olena Teliha, Mykola Zerov, and Anatoliy Lupynos.

In 2026, the company was recognized by DOU as the most promising project in the defense tech sector.

Purpose of the Role: Turn observations from global social content into clear creative briefs for the execution team, grounded in performance data.

Key Responsibilities:

• Develop creative concepts for social media
• Track what works in social globally — and specifically within defense tech / dual-use (peer companies, allied and adversary content) — and turn those observations into ideas for the brand
• Write creative briefs for designers, copywriters, photographers, and videographers, and review delivered work against them
• Own the brand's Threads presence — you write and publish directly
• Feed performance data back into future briefs — which formats and angles actually drive reach/engagement, not just what trends externally

• You work as a pair with the SMM Manager, who owns publishing and the content calendar for the primary channels.

   

Experience and skills we are looking for:

• 2+ years in creative strategy, content production, copywriting, or social media — brand side or agency
• A portfolio of concepts, not a feed of published posts: we need to see how you think, not only what shipped
• Strong writing in Ukrainian and English — you publish under the brand's name without an editor
• Strong command of Figma and Canva 
• Working knowledge of CapCut or Premiere/Rush — not for editing itself, but to write realistic, technically sound briefs for videographers
• Comfortable writing and publishing directly (not just briefing others) 

• Proficiency with modern LLM tools in the creative process

   

It’s a plus if you have:

• Experience working in defence-tech or with military units 

   

Why Choose Us?

• Work that has a real impact. We build products that directly strengthen Ukraine's defense capabilities.
• Opportunity to work alongside top-tier engineers in MilTech and autonomous systems.
• Official employment under the Diia.City legal framework. 
• The possibility of reservation (deferment) for conscripts in accordance with the requirements of current legislation. 
• Annual paid leave — 24 calendar days. 
• Additional paid leave for veterans — 14 calendar days. 
• Paid sick leave in accordance with the law. 
• Voluntary health insurance after completing the probation period.

• Possibility of reimbursement for training costs according to internal company policies.

   

We are not just looking for employees, but for like-minded individuals who share our values and are ready to build the future of Ukrainian MilTech.