Jobs at DefTech companies

Middle System Administrator

We are looking for a System Administrator to join our team to manage, support, and develop our IT infrastructure, handle identity & access management, and oversee device management (Windows/macOS). 

Key Responsibilities

• Employee Onboarding/Offboarding: Creating and deactivating user accounts, configuring access permissions, and preparing workstations and office equipment.
• Technical Support: Providing L1/L2 technical assistance to users on macOS and Windows.
• Server Administration: Administering Windows Server OS.
• SaaS Administration: Managing Microsoft 365 and Google Workspace environments.
• Device Management (MDM): Configuring policies, profiles, and applications, as well as enrolling PCs/macOS devices via Microsoft Intune.
• IT Asset Management: Maintaining the corporate hardware inventory (tracking assets, statuses, issuance, and returns).
• Access Control: Managing users, groups, and access rights in accordance with company policies.
• Security Management: Configuring and maintaining MFA, security policies, and authentication scenarios.
• Network Administration: Basic setup and maintenance of MikroTik network equipment.
• Local Area Networks (LAN): Diagnosing, configuring, troubleshooting, and expanding local networks.
• Documentation: Maintaining IT documentation (hardware inventory, access matrix, network architecture, and user guides).

Requirements

• 2+ years of experience as a System Administrator or IT Support Specialist.
• Hands-on experience administering Microsoft 365 and Google Workspace.
• Hands-on experience with Microsoft Intune (MDM/MAM).
• Deep understanding and practical experience supporting both macOS and Windows.
• Solid understanding of core networking technologies (DNS, DHCP, VPN, VLAN) and basic experience with MikroTik.
• Knowledge of Information Security fundamentals (MFA, password policies, access control matrix).
• English: Intermediate (reading technical documentation).
• Strong self-prioritization skills and a responsible approach to deadlines.

Nice to Have

• Experience with scripting (PowerShell, Bash).
• Experience supporting remote employees.
• Microsoft or Google Workspace Administrator certifications.
• Experience working with CRM and ERP systems (e.g., Odoo).

 What we offer:

• Work on innovative UAV and drone technologies
• Participation in R&D projects developing new aerial systems
• Official employment
• A team environment where initiative and technical curiosity are encourage

We are looking for a Senior RF Engineer to take ownership of the radio communication subsystem across the full development cycle — from RF architecture and PCB design to embedded firmware, system integration, laboratory characterization, and field validation.

The role requires strong hands-on experience with RF hardware, antennas, embedded systems, digital communications, and communication links operating in complex and interference-heavy environments.

Scope of Expertise

RF Front End and Antennas

• RF circuit and PCB design, controlled impedance, and impedance matching.
• Receiver and transmitter chains: LNA, power amplifiers, filtering, and noise figure optimization.
• Frequency synthesis, phase noise, shielding, and power supply design for RF subsystems.
• Antenna integration on compact mobile platforms, including placement, radiation patterns, VSWR, and isolation between co-located radio systems.

Electromagnetic Compatibility

• Mitigation of interference generated by compute modules, motor controllers, switching regulators, and power electronics.
• Protection of GNSS receivers from onboard electromagnetic interference.
• EMI/EMC analysis and practical mitigation at board and system level.

Signals, Protocols, and Networking

• Modulation schemes, forward error correction, and trade-offs between range, data rate, and robustness.
• Frequency hopping and spread-spectrum techniques.
• Synchronization between radio nodes.
• Mesh networking: multiple access, airtime scheduling, relaying, routing, and network degradation/recovery after node loss.
• Understanding of LoRa / LPWAN technologies, including their capabilities and practical limitations.
• MAVLink protocol structure, telemetry streams, and integration with flight controllers.

Embedded Firmware

• STM32 development in C using HAL/LL.
• MCU peripherals, DMA, interrupts, and timers.
• Low-level communication with radio transceivers via SPI, UART, and I2C.
• Embedded firmware debugging using oscilloscopes, logic analyzers, and other laboratory tools.

Operation in Contested RF Environments

• Anti-jamming techniques and frequency agility.
• Detection of interference or jamming and adaptive channel response.
• Approaches to reducing the probability of detection and interception.
• Communication-link robustness against spoofing and intentional interference.

RF Measurement and Validation

• Link-budget calculation and analysis.
• Spectrum analyzer and vector network analyzer operation.
• Development of laboratory and field test methodologies.
• Quantitative characterization of communication-link performance under interference.
• Support for regulatory testing and certification.

Responsibilities:

• Audit the existing RF subsystem, including schematics, PCB layout, RF front end, and antenna architecture.
• Identify technical risks and prepare a clear improvement and revision plan.
• Design and release the next revision of the RF PCB, from schematic capture through laboratory characterization.
• Develop firmware for STM32-based radio modules, including transceiver drivers, protocol-layer functionality, and node synchronization.
• Build and maintain a link-budget model for the target system, including degraded and worst-case scenarios.
• Develop antenna solutions and ensure compatibility between multiple co-located radio systems.
• Contribute to mesh-network architecture, including channel parameters, node-loss behavior, network recovery, and fallback routing.
• Integrate the telemetry link with the flight controller via MAVLink.
• Define and execute laboratory and field validation campaigns.
• Quantitatively evaluate communication-link performance under interference and jamming.
• Produce technical documentation suitable for external technical review.
• Support preparation for regulatory certification.
• Perform technical evaluation of RF-related suppliers and components.

Out of Scope:

This role does not cover:

• autonomous navigation and flight-control software;
• computer vision;
• airframe mechanical design;
• ground control station software.

Required Qualifications:

• 7+ years of professional experience in RF and wireless communication systems, with hardware that has been successfully brought to production or real-world deployment.
• Proven experience across the full development cycle:
  schematic → PCB layout → firmware → bring-up → field validation.
• Strong STM32 programming skills in C.
• Hands-on experience with antenna integration on compact or mobile platforms.
• Strong practical experience with RF measurement equipment.
• Solid understanding of digital communications sufficient to make engineering decisions regarding channel parameters and system architecture.
• Ability to produce clear technical documentation in English.
• Comfortable working in a small engineering team with tight deadlines and an evolving technical scope.

Nice to Have

• Practical experience with mesh networks beyond simple point-to-point communication.
• Experience with electronic warfare environments, anti-jamming techniques, or operation in congested RF spectrum.
• Experience with unmanned systems, avionics, or platforms with strict size, weight, power, and energy constraints.
• Production experience with LoRa and MAVLink.
• Experience taking a radio product through regulatory certification.

Middle Developer

Role Description

We are looking for a Middle Software Developer to join our R&D team and contribute to the development of innovative products and technologies. In this role, you will participate in the full software development lifecycle, from researching and validating new ideas to implementing, testing, and supporting production-ready solutions.

The ideal candidate is capable of independently delivering medium-complexity features, taking ownership of their work, and proactively proposing improvements to products and development processes. You will collaborate closely with Product Owners, engineers, and other stakeholders to transform business and technical requirements into reliable software solutions.

This position requires a strong engineering mindset, a passion for learning new technologies, and the ability to rapidly build prototypes and proof-of-concepts using modern development tools, including AI-assisted technologies. You will be expected to contribute not only through coding but also through technical discussions, code reviews, and continuous improvement initiatives.

Main Responsibilities

• Full-time participation in product development
• Research and evaluate new technologies, frameworks, and implementation approaches
• Develop prototypes and proof-of-concepts for new ideas and use cases
• Design and implement new features using modern technologies and best practices
• Maintain and support developed features throughout their lifecycle
• Write clean, maintainable, and efficient code
• Participate in code reviews and provide constructive feedback
• Investigate and fix defects and production issues
• Collaborate with Product Owners, QA Engineers, Designers, and other stakeholders
• Contribute to technical discussions and architecture decisions

• Create and maintain technical documentation where necessary

   

Required Skills

Programming Languages

• Strong proficiency in C#

• Good proficiency in TypeScript

   

Software Development

• Understanding of object-oriented design principles (SOLID)
• Experience with modern software development practices
• Knowledge of design patterns and when to apply them
• Experience with REST APIs and client-server architectures
• Ability to troubleshoot and debug complex issues

• Understanding of software testing principles

   

DevOps & CI/CD

• Understanding of CI/CD pipelines and automated deployments
• Experience using Git and common branching strategies

• Familiarity with build and release processes

   

AI & Rapid Prototyping

• Experience using AI-assisted development tools (ChatGPT, GitHub Copilot, Claude, etc.)

• Ability to rapidly create prototypes and validate concepts

   

Soft Skills

• Strong problem-solving skills
• Proactive mindset and willingness to propose improvements
• Good communication skills
• Ability to work independently with limited supervision

• Ability to estimate and plan own work

   

Nice-to-Have Skills

Programming & Technologies

• Python development experience
• Experience with Angular or React
• Experience with cloud platforms (AWS)
• Understanding of microservices architecture

DevOps

• Experience creating and maintaining CI/CD pipelines
• Infrastructure as Code experience

Embedded & Hardware

• Experience with microcontroller or microcomputer development
• Experience with Raspberry Pi, Jetson, STM32, ESP32, or similar platforms
• Basic electronics and hardware integration knowledge

Additional Advantages

• Experience with Agile/Scrum methodologies
• Experience mentoring junior developers
• Technical writing/documentation skills

What We Offer:

• Official employment with full compliance with Ukrainian labor law and all associated benefits
• Military service reservation (deferment)
• Flexible working hours within a standard Monday–Friday schedule (10:00 AM–6:00 PM)
• A modern and comfortable office in Vinnytsia
• A supportive team and a stable, long-term opportunity.

Ми шукаємо інженера-конструктора для розробки БПЛА літакового типу, який зможе працювати над літальним апаратом комплексно — від початкової компоновки та аеродинамічної схеми до деталізації конструкції, виготовлення прототипу та аналізу результатів льотних випробувань.
Нам потрібен не просто CAD-конструктор, а інженер, який розуміє, чому літак має саме таку геометрію, центровку, площу крила та оперення, розміри керуючих поверхонь і характеристики приводів.

Основні задачі

• Проєктування загальної компоновки БПЛА літакового типу.
• Розробка конструкції планера: фюзеляжу, крила, оперення, силових елементів, кріплень та механізмів.
• Розміщення всередині платформи:
  • силової установки;
  • акумуляторів;
  • авіоніки;
  • засобів зв'язку;
  • корисного навантаження;
  • сервоприводів та механізмів керування.
• Розрахунок центру мас та допустимого діапазону центровки літака для різних конфігурацій корисного навантаження.
• Оцінка поздовжньої та поперечної стійкості літака, static margin.
• Розрахунок та підбір:
  • площі та геометрії крила;
  • профілю крила;
  • горизонтального та вертикального оперення;
  • площі та необхідних кутів відхилення керуючих поверхонь.
• Розрахунок необхідних характеристик сервоприводів:
  • необхідного моменту;
  • швидкості переміщення;
  • необхідної кутової швидкості;
  • навантаження на сервопривід залежно від швидкості польоту та геометрії керуючої поверхні.
• Підбір матеріалів та конструктивних рішень з урахуванням маси, міцності та технологічності виробництва.
• Створення 3D-моделей деталей, вузлів та повних assemblies у CAD.
• Підготовка креслень та конструкторської документації.
• Участь у виготовленні та складанні прототипів.
• Аналіз результатів наземних та льотних випробувань.
• Ітеративне вдосконалення конструкції за результатами тестів.

Необхідний досвід

• Практичний досвід механічного проєктування складних виробів.
• Впевнене володіння однією з CAD-систем:
  • SolidWorks;
  • Fusion 360;
  • CATIA;
  • Siemens NX;
  • Inventor або аналогами.
• Розуміння принципів проєктування деталей, вузлів та складальних конструкцій.
• Вміння виконувати базові інженерні розрахунки конструкції.
• Розуміння властивостей та особливостей застосування:
  • алюмінієвих сплавів;
  • сталей;
  • пластиків;
  • композитних матеріалів;
  • карбону та склопластику.
• Розуміння технологій виробництва: CNC, 3D-друк, композитне виробництво, листові та механічно оброблені деталі.

Дуже бажано

• Знання аеродинаміки та механіки польоту, зокрема:
• Досвід проведення CFD-симуляцій та аеродинамічного аналізу, наприклад у:
• Буде значною перевагою вміння за допомогою CFD:

Також буде плюсом

• Досвід безпосередньої розробки БПЛА або літаків.
• Авіамоделювання та практичний досвід побудови fixed-wing платформ.
• Досвід розрахунків FEA / structural analysis.
• Розуміння силових установок: electric motor + propeller / ICE.
• Розрахунок тягоозброєності, енергоспоживання, дальності та часу польоту.
• Досвід підбору двигунів, ESC, пропелерів та акумуляторів.
• Розуміння ArduPilot / PX4 та принципів роботи автопілота.
• Досвід аналізу flight logs.
• Практична участь у льотних випробуваннях.

Ми пропонуємо:

• роботу в сучасній defense-tech компанії;
• офіційне працевлаштування;
• конкурентну та своєчасну заробітну плату;
• роботу з інноваційними технологіями та реальними продуктами;
• дружню команду та відкриту комунікацію.

About the Job

We are looking for an IT Systems & Support Administrator based in our UA Office, reporting directly to the Engineering Manager in Germany.
 

In this role, you will balance two key functions: providing hands-on local support for the UA office while acting as a core member of the central IT team — managing company-wide identity, endpoint security, ticketing workflows, and global asset inventory.
 

Key Responsibilities:

1. Central Systems, Operations & Endpoint Management (Global Scope)

• Identity & Access Management: Administer Okta (users, groups, MFA enforcement) and Google Workspace.
• Endpoint Management (MDM): Enroll, configure, secure, and patch endpoints across all regions using Workspace ONE.
• IT Service Desk & Documentation: Triage, track, and resolve end-user incidents and service requests using Jira. Maintain up-to-date technical documentation, internal guides, and knowledge base articles.
• Global Asset Management: Maintain and track the entire company’s IT asset inventory and hardware lifecycle across all sites.
• Security Compliance: Deploy software, manage system updates, and enforce IT security policies globally.

2. Local IT & Site Infrastructure (UA Office)

• Act as the primary on-site contact for UA employees for hardware, OS, and application troubleshooting.
• Execute physical onboarding/offboarding, hardware setup, and distribution at the UA site.
• Maintain local site infrastructure (Wi-Fi, switches, firewalls, and physical security systems) in close coordination with and supported by the HQ Infrastructure Team.
   

Qualifications:

• Experience: 3+ years in System Administration, Identity Management, or Multi-site IT Support.
• Hands-on experience with Jira (Jira Service Management / ticketing systems) and technical documentation.
• Administration of Google Workspace and Okta (SSO, MFA).
• Experience with Workspace ONE (or enterprise MDM tools) for software deployment and patch management.
• Core network troubleshooting skills (TCP/IP, Wi-Fi, Firewalls).
• Work Style: Strong ownership mindset. Ability to work independently under remote management while collaborating seamlessly with HQ.
• Languages: Fluent English (written & spoken) is mandatory. Local language fluency required for UA site support.
   

We offer:

• Impactful Work: A high-impact role shaping next-generation technologies used by leading world armies and first responders.
• Professional Growth: Opportunities for development and training
• Direct Feedback: Close collaboration with end-users and the chance to see the immediate impact of your work in the field.
• Agile Environment: A fast-paced work culture with minimal bureaucracy and flexible working hours.
• Medical insurance

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.

Key Responsibilities:

• Own product positioning and messaging, translating complex technology into clear product value
• Lead Go-To-Market planning and execution for product launches and major updates
• Work with engineering, product, and operators to translate capabilities and operational needs into product strategy and messaging
• Create core product assets: product pages, presentations, technical materials, and sales collateral
• Analyze the market to inform product strategy and differentiation
• Ensure consistent product messaging across marketing materials, websites, and other channels in collaboration with design and marketing teams

Experience and skills we are looking for:

• 2+ years of experience in Product Marketing, preferably in deep-tech, robotics, AI, hardware, or other complex technology products
• Experience supporting product launches and bringing new technical products to market
• Strong analytical skills with experience in market research, competitive analysis, and product/business metrics
• Ability to translate complex technical systems into clear product positioning, value propositions, and product materials
• Experience developing Go-To-Market strategies in collaboration with product, engineering, and design teams
• English proficiency at B1+ level or higher

• Proficiency with modern LLM tools

   

Nice to have:

• Experience working in defence-tech or with military units
• Drone piloting skills

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. 
• 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.