Jobs Backend

Blackthorn Vision is seeking a Middle Strong/Senior Backend Developer (Node.js) for an outstaff project with a global leader in energy technology. Founded in 1926 and headquartered in Houston, Texas, the company has 100,000 employees serving customers in more than 120 countries and develops software solutions for automation across the energy and industrial sectors.

You will work as part of an international team, collaborating with Blackthorn Vision specialists, client-side engineers, and management. We are looking for a self-driven team player with strong problem-solving skills, a commitment to quality, and a passion for delivering robust and maintainable software solutions. Upper-Intermediate English or higher is required for effective day-to-day communication. The position follows a regular full-time working schedule aligned with the Ukrainian time zone.

In this role, you will build and support backend services that process operational and time-series data and deliver reliable APIs and event-driven solutions. You will work with technologies such as Kafka, Azure IoT Hub, RabbitMQ, Redis, Kubernetes, and Microsoft Azure to develop high-performance, resilient, and scalable applications.

Required Qualifications:

• 4+ years of professional software development experience.
• Strong hands-on experience with Node.js and TypeScript.
• Basic experience with Java and Spring Boot.
• Experience with Microservices Architecture, Event-Driven Architecture, and REST APIs.
• Strong understanding of system architecture and business requirements.
• Hands-on experience with Kafka and RabbitMQ.
• Experience with PostgreSQL, Cassandra, Redis, or similar relational/NoSQL databases.
• Experience with Docker, Kubernetes, Microsoft Azure, and Azure IoT Hub.
• Experience with CI/CD, DevOps practices, and modern observability tools.
• Experience using AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, Cursor, or similar.

• Excellent problem-solving, communication, and collaboration skills.

   

Nice to have:

• Experience working with operational and time-series data.

• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field.

   

We Offer:

• Exciting and challenging work in a friendly and professional environment.
• Excellent career opportunities and competitive salary.
• Flexible work schedule.
• Professional development program with internal seminars on technical topics.
• Courses, certifications, and access to the corporate library.
• Free English classes.
• 18 working days of paid vacation, 5 full-paid sick leave days, paid public holidays.
• Medical insurance.
• Maternity leave.
• IT club membership.
• Employee referral program.
• Recognition program with gifts and awards.
• Pet-friendly and eco-friendly.
• Direct and easy communication with management.

Job Description

• 5 or more years relevant work experience with BS, or 3 or more years or relevant work experience with MS Degree in Computer Science, Electrical Engineering or related field
• Experience across full software development life-cycle including design, requirements, implementation, andtest
• Java, JavaScript/TypeScript and script programming languages
• Strong development skills with databases and SQLs
• Practical experience working within an Agile/Scrum based environment
• Familiar with AWS services for example S3, ECS, EKS, MSK, VPC, RDS, etc
• Knowledge of Kafka

Job Responsibilities

• Designs, develops, debugs, modifies, tests software programs using Java, Scripting and other current programming languages, methodologies and technologies.
• Perform hands-on Java Development, adoption of modern software engineering & delivery practices using Java, Spring Boot REST/Microservices, AWS.
• Documents software development and/or test development by writing documents, reports, memos, change requests. Methods used are determined by approved procedures and standards
• Tracks software development effort by creating and maintaining records in the approved tracking
  management tool.
• Solves engineering problems by analyzing the situation and recommending corrective or alternative actions.
• Analyzes, evaluates, verifies requirements, software and systems by using software engineering practices.
• Investigates, researches, selects software designs, operating systems and/or practices.
• Continuously improves process and work methodologies by interfacing with peers/cross-functional groups and analyzing activities to improve workflow and work processes.
• Directs support personnel and project activities.
• In all actions, demonstrates a primary commitment to patient safety and product quality by maintaining compliance to the Quality Policy and all other documented quality processes and procedures.
• Represents organization as a prime contact on contracts or projects. Uses discretion, diplomacy, and tact to
  resolve difficult situations. May escalate serious issues to manager.
• Participates in the development of less experienced staff by setting an example, providing guidance, and
  offering counsel.

Department/Project Description

Our customer is an American manufacturer and globally recognized leader in Healthcare and Medical Devices. In close cooperation with the international team you will have the ability to participate in product feature definition, development, testing, and post-release support for innovative medical products.

Ready to build systems operating at internet scale and fight sophisticated digital fraud in real time? We are looking for a Senior Golang Backend Engineer to join a cross-functional team developing cutting-edge AdTech and cybersecurity solutions.

In this role, you will work with high-load distributed systems processing over 1.5 trillion prediction requests daily while collaborating with data scientists, malware analysts, and product experts. You will contribute to building scalable fraud prevention technologies used by major internet companies worldwide.

We at Sigma Software offer the opportunity to work on impactful global products, solve complex engineering challenges, and grow alongside experienced professionals in a collaborative and innovation-driven environment. Work format and location are flexible depending on your preferences and project needs.

Customer

Our Customer is a global cybersecurity company delivering advanced protection solutions for individuals, organizations, and digital ecosystems. The company specializes in large-scale threat detection, digital risk mitigation, and real-time protection technologies designed to combat sophisticated online threats across multiple industries.

Project

The project focuses on building a real-time risk assessment platform for the digital advertising ecosystem. The solution helps identify invalid, fraudulent, or low-quality traffic before advertising budgets are spent, enabling automated decision-making in real time.

The team develops advanced fraud detection technologies integrated with major AdTech platforms, agencies, and brands. Engineers work closely with researchers and analysts to uncover abuse patterns, reduce sophisticated invalid traffic (IVT), and improve transparency across programmatic advertising systems.

Job Description

• Design, develop, and maintain high-performance backend services in Golang
• Build and optimize distributed systems processing trillions of prediction requests daily
• Collaborate with data scientists, malware analysts, researchers, and product managers
• Improve system scalability, reliability, latency, and cost efficiency
• Develop, test, review, deploy, and maintain software across multiple environments
• Ensure software quality through clean architecture and engineering best practices
• Contribute to backlog prioritization and technical planning
• Deploy and support services in Kubernetes environments
• Investigate fraudulent activities and develop new fraud prevention approaches
• Drive engineering excellence within a collaborative product-oriented team

Qualifications

• 5+ years of commercial software development experience
• Strong commercial experience with Golang and backend engineering
• Strong Computer Science fundamentals including algorithms, data structures, concurrency, and system design
• Proven experience with high-load distributed systems
• Experience with performance tuning, latency optimization, and memory management
• Hands-on experience with Kubernetes, Terraform, and Helm Charts
• Good understanding of DevOps practices and cloud-native deployments
• Experience with SQL databases and large-scale data processing
• Experience working with AI tools, LLMs, or agent-based systems
• Product-oriented mindset and ability to align technical solutions with business goals
• Experience across the full software development lifecycle
• Ability to design stable, maintainable, and scalable architectures
• Availability to work with flexible hours and maintain 3–4 hours overlap with EST time zone
• Upper-Intermediate English level or higher

Will Be a Plus

• Experience with Apache Airflow
• Experience with Python
• Experience with Snowflake
• Experience in the AdTech domain
• Experience with C++

Personal Profile

• Strong analytical and problem-solving mindset
• Ownership mentality and proactive approach
• Ability to work effectively in a cross-functional environment
• Passion for scalable and high-quality systems
• Ability to balance technical excellence with business priorities
• Comfortable working in a fast-paced product environment

Готові працювати із системами інтернет-масштабу та допомагати протидіяти складному цифровому шахрайству в режимі реального часу? Ми шукаємо Senior Golang Backend Engineer до кросфункціональної команди, яка створює сучасні рішення на перетині AdTech і кібербезпеки.

У цій ролі ви працюватимете з high-load distributed systems, які щодня обробляють понад 1,5 трильйона prediction requests, а також тісно взаємодіятимете з data scientists, malware analysts, researchers та product experts. Ви долучитеся до розробки масштабованих технологій для запобігання шахрайству, якими користуються провідні інтернет-компанії по всьому світу.

У Sigma Software ви матимете можливість працювати над глобальними продуктами, вирішувати складні інженерні задачі та розвиватися поруч із досвідченими фахівцями. Ми цінуємо співпрацю, технічну експертизу та прагнення постійно вдосконалюватися. Формат роботи та локація можуть бути гнучкими залежно від ваших побажань і потреб проєкту.

Customer

Наш Customer — глобальна компанія у сфері кібербезпеки, яка розробляє технології для захисту людей, бізнесу та цифрових екосистем. Компанія спеціалізується на масштабному виявленні загроз, зниженні цифрових ризиків і захисті в реальному часі, допомагаючи протидіяти складним онлайн-загрозам у різних індустріях.
 

Project

Проєкт присвячений розвитку risk assessment platform, яка працює в режимі реального часу та є частиною digital advertising ecosystem. Платформа допомагає виявляти невалідний, шахрайський і низькоякісний трафік ще до того, як рекламні бюджети будуть витрачені. Рішення автоматично оцінює ризики та приймає рішення в режимі реального часу.

Команда створює сучасні технології для виявлення fraud, які інтегруються з провідними AdTech-платформами, агентствами та брендами. Engineers тісно співпрацюють із researchers та analysts, щоб знаходити нові patterns of abuse, зменшувати обсяг sophisticated invalid traffic (IVT) та підвищувати прозорість programmatic advertising systems.

Job Description

• Розробляти та підтримувати високопродуктивні backend services на Golang
• Проєктувати й оптимізувати distributed systems, здатні обробляти трильйони prediction requests щодня
• Тісно співпрацювати з data scientists, malware analysts, researchers та product managers
• Працювати над scalability, reliability, latency та cost efficiency систем
• Розробляти, тестувати, проводити code reviews, деплоїти та підтримувати software у різних environments
• Забезпечувати високу якість коду завдяки clean architecture та engineering best practices
• Брати участь у backlog prioritization і technical planning
• Деплоїти та підтримувати сервіси в Kubernetes environments
• Аналізувати fraud activity та розробляти нові підходи до fraud prevention
• Сприяти розвитку engineering excellence у collaborative, product-oriented команді
   

Qualifications

• 5+ років комерційного досвіду у software development
• Сильний практичний досвід роботи з Golang та backend engineering
• Ґрунтовні знання Computer Science fundamentals, зокрема algorithms, data structures, concurrency та system design
• Підтверджений досвід роботи з high-load distributed systems
• Практичний досвід у performance tuning, latency optimization та memory management
• Досвід роботи з Kubernetes, Terraform та Helm Charts
• Розуміння DevOps practices та cloud-native deployments
• Досвід роботи з SQL databases та large-scale data processing
• Досвід використання AI tools, LLMs або agent-based systems
• Product-oriented mindset та здатність пов’язувати технічні рішення з бізнес-цілями
• Досвід роботи на всіх етапах software development lifecycle
• Здатність проєктувати стабільні, масштабовані та maintainable architectures
• Готовність працювати за гнучким графіком із 3–4 годинами перетину з EST
• Англійська на рівні Upper-Intermediate або вище

Will Be a Plus

• Досвід роботи з Apache Airflow
• Досвід роботи з Python
• Досвід роботи зі Snowflake
• Досвід у AdTech

• Досвід роботи з C++

   

Personal Profile

• Сильне аналітичне мислення та розвинені problem-solving skills
• Високий рівень ownership і проактивність у роботі
• Здатність ефективно взаємодіяти в кросфункціональних командах
• Інтерес до створення масштабованих, надійних і якісних систем
• Уміння знаходити баланс між технічною досконалістю та бізнес-пріоритетами
• Комфортна робота у fast-paced product environment

You are a Computer Science expert with a strong understanding of advanced data structures, hashing mechanism, complexity of search, sorting, and you have a high-level knowledge of many sorting algorithms.

Being part of our growing RandD team involved in groundbreaking mobility focused research in the Mobile and IoT sectors, you will be provided with amazing opportunities to work on exciting projects that offer innovative mobile device solutions to our enterprise clients across the world.

What You’ll Do

- Take on research and development projects, break down into fundamental elements, explore potential technical paths and propose team approach for architecture and software development elements;

- Understand existing and future product technical challenges and identify solution paths for development; coaching the team along the technical path for optimal solution design;

- Develop innovative solutions to tackle big industry problems in the Mobile and IoT sectors;

- Actively contribute in brainstorming and idea generation activities, as well as participate in enhancing/maintaining existing solutions;

- Maintain high standards of quality for code, technical documentation, and deliverables;

- Define and implement best coding practices; proactively keep a tab on emerging technologies;

- Provide technical guidance on the research and development of new products and services;

- Work closely with the manager to ensure the product is evolving according to need;

- Write well designed, scalable, reliable, testable and reusable code by using best software development practices, clean code and solid principles;

- Contribute towards the entire development lifecycle of analysis, design, implementation and test;

- Detect, report, investigate, and fix product defects;

- Automation, including writing unit and integration tests;

- Collaborate on projects with an all-star team comprised of varying skillsets through code reviews and design discussions;

- Constantly update your knowledge and stay up-to-date with advanced technologies to be able to provide the best solutions for new projects, and

- Have fun, with all of the above!

Experience You’ll Bring

- 8+ years of hands-on experience in software development and solution design preferably with product companies;

- Proven track record of successfully making a positive impact as a tech visionary;

- Previous RandD experience would be a definite asset;

- You have incredible coding skills. Your programming abilities are way above average and you can engage in meaningful conversations about modern technology;

- You obsess over server scalability and robustness and your work reflects that;

- You are a Computer Science expert with a strong understanding of advanced data structures, hashing mechanism, complexity of search, sorting, and you have a high-level knowledge of many sorting algorithms;

- You are constantly investigating new technologies and introducing them into existing products;

- You possess a deep knowledge of Microsoft technology stack- .NET, .NET Core, ASP.NET Web API, SQL Server;

- You have a demonstrable versatility in various front-end and back-end technologies, ideally AngularJS 6 and above, RxJS and knowledge of Flus and Redux. Additionally, JavaScript, HTML5, CSS3, NodeJS, REST APIs, JSON, WCF, Web API, Unity, LINQ;

- You have excellent understanding of unit test principles, multi-layer architecture, SOA principles and best development practices, as well as previous experience using OOD, Design Patterns, Data Modelling and Storage with well-known relational database (preferably SQL);

- Understanding/or strong interest in agile methods such as Scrum/XP, Behavior Driven Development, and Continuous Delivery;

- You are eager to constantly learn and update your skills, and you like to share knowledge with others;

- You are a self-starter with a high degree of initiative, a can-do attitude and a positive mindset;

- Degree from an accredited college/university or equivalent work experience.

What’s in it for you?

The People - From our humble origins in our founder’s basement, to our industry leading position today, SOTI has worked hard to foster a company culture that we can all believe in. A culture that emphasizes personal growth, continuous innovation and fun.

The Growth - Our environment fosters new ideas, fresh perspectives, and the ability to take them over the goal line. SOTI is a fast-paced environment with a global reach that encourages you to make your mark and be part of something big!

The Technology - You’ll get the chance to work with leading edge technologies and take on complex and interesting projects, as part of highly collaborative and agile teams. You will work alongside SOTI’s partners which include leading tech giants that will keep you on the cusp of emerging technologies.

Blackthorn Vision is seeking a Middle Strong/Senior Backend Developer (Java) for an outstaff project with a global leader in energy technology. Founded in 1926 and headquartered in Houston, Texas, the company has 100,000 employees serving customers in more than 120 countries and develops software solutions for automation across the energy and industrial sectors.

You will work as part of an international team, collaborating with Blackthorn Vision specialists, client-side engineers, and management. We are looking for a self-driven team player with strong problem-solving skills, a commitment to quality, and a passion for delivering robust and maintainable software solutions. Upper-Intermediate English or higher is required for effective day-to-day communication. The position follows a regular full-time working schedule aligned with the Ukrainian time zone.

In this role, you will build and support backend services that process operational and time-series data and deliver reliable APIs and event-driven solutions. You will work with technologies such as Kafka, Azure IoT Hub, RabbitMQ, Redis, Kubernetes, and Microsoft Azure to develop high-performance, resilient, and scalable applications.

Required Qualifications:

• 4+ years of professional software development experience.
• Strong hands-on experience with Java, Spring Framework, and Spring Boot.
• Basic experience with Node.js and TypeScript.
• Experience with Microservices Architecture, Event-Driven Architecture, and REST APIs.
• Strong understanding of system architecture and business requirements.
• Hands-on experience with Kafka and RabbitMQ.
• Experience with PostgreSQL, Cassandra, Redis, or similar relational/NoSQL databases.
• Experience with Docker, Kubernetes, Microsoft Azure, and Azure IoT Hub.
• Experience with CI/CD, DevOps practices, and modern observability tools.
• Experience using AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, Cursor, or similar.
• Excellent problem-solving, communication, and collaboration skills.

Nice to have:

• Experience working with operational and time-series data.
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field.

Please note: We are open to considering candidates based abroad; however, cooperation is available only under Ukrainian contracting arrangements.

• You will join a Regulatory Reporting Platform within a large US investment bank. The platform is responsible for collecting, processing, and transforming large volumes of data from multiple internal systems to produce regulatory reports for 240 jurisdictions worldwide. In total, the platform supports around 10,000 reports across a wide range of regulatory, compliance, financial, and risk reporting areas.
  This is a large-scale, business-critical data platform operating in a highly regulated environment, where data accuracy, quality, traceability, and timely delivery are essential. The team works on building and enhancing data pipelines, implementing reporting logic, ensuring data validation and reconciliation, and supporting the generation of complex regulatory outputs.
  The project is delivered by a global distributed team with colleagues located in Ukraine, Poland, and the US, offering close collaboration with engineers, analysts, and business stakeholders across multiple regions.

   

• Responsibilities:

  - Design, develop, and maintain solutions for a large-scale Regulatory Reporting Platform
  - Build and enhance data processing pipelines using Java and Apache Spark
  - Implement scalable logic for data ingestion, transformation, aggregation, and enrichment from multiple internal data sources
  - Develop and optimize batch processing jobs to support the generation of regulatory reports across multiple jurisdictions
  - Ensure high standards of data quality, validation, reconciliation, and consistency throughout the reporting lifecycle
  - Translate business and regulatory requirements into robust technical solutions
  - Collaborate with business analysts, QA engineers, and cross-functional teams to deliver reporting functionality
  - Investigate and resolve data and application issues in development, test, and production environments
  - Improve application performance, scalability, and reliability for high-volume data processing workloads
  - Contribute to the design and implementation of reusable components and engineering best practices
  - Participate in code reviews, testing, and release activities to ensure high-quality deliverables
  - Work closely with distributed teams across Ukraine, Poland, and the US in an agile delivery model
  - Support continuous improvement of the platform, including monitoring, troubleshooting, and operational stability

   

• Mandatory Skills Description:

  - 6+ years of commercial experience with Java
  - Experience in designing and developing scalable, high-performance backend applications
  - Good knowledge of SQL and working with large datasets from multiple data sources
  - Strong problem-solving skills and ability to work effectively in a global distributed team

   

• Nice-to-Have Skills Description:

  - Experience in financial services, investment banking, or regulatory reporting projects
  - Familiarity with data quality, reconciliation, and control frameworks
  - Experience working with large-scale enterprise data platforms
  - Knowledge of cloud environments and modern data platform architectures
  - Understanding of CI/CD practices and automated deployment pipelines
  - Experience working in Agile / Scrum teams within a distributed global setup

   

• Languages:
  • English: B2 Upper Intermediate

FTE: Full-time (40 h per week)
Timeline: 3-6 months (tbd)
Start: ASAP
English: B2
Recruitment process: a tech check with our client, then an interview with the main client

The company
A well-established B2D (business-to-developer) SaaS platform operating at significant scale. Their product is infrastructure-level - real-time connectivity used by developers worldwide.

The team
~6–7 people: tech lead, PM, delivery manager, 3 web engineers + contractors. Small, tight-knit, opinionated. Standups Monday and Friday.

The role
One senior hire. This is a product-minded engineering role, not ticket execution. They’re shifting away from reactive delivery toward engineers who understand customers and drive outcomes.

Tech stack
React + TypeScript (frontend), Ruby on Rails (backend), some Node/TS services, Postgres.

What they’re looking for

• Developer empathy - you build tools for developers, you get the frustrations firsthand
• Product thinking - question requirements, propose what should be built
• Ownership - concept to shipped with minimal hand-holding
• Proactive communicator
• Comfortable with AI coding assistants (they use them actively)
• Design + UX intuition

Vreal Soft is a Ukrainian IT company developing mobile applications and websites. We have been working successfully for more than 7 years on the market of the States and Israel. The head office is located in Cherkasy, but we are constantly developing and expanding the horizons of cooperation to other cities, currently we have opened a branch in Dnipro.

The best interns are able to finish before the ending date of internship and start to work as “Junior MS Dynamics Developer”. Program is oriented for both professional experienced candidates and those who just have started their careers.

Requirements:

-Experience with .NET framework/.NET Core

-Knowledge of C# development, including areas: multithreading, interfaces, dependency injection.

Would be great to know:

-Experience with ASP.NET Core and ASP.NET Core MVC

-Knowledge of Azure basic services.

-Understanding REST API architecture.

-Experience with MS SQL

-Experience with the Entity Framework core.

-Ability to communicate well with process stakeholders and team members related to business requirements

-English Intermediate+ (written and spoken)

-Microsoft SharePoint, Microsoft Dynamics 365 services (Power Apps, Power Automate, Power BI, etc) will be a plus

What do we expect from you?

-Self-organization and independence at work

-Attention to detail

-Continuous learning

We offer:

-Competitive salary level;

-Financial growth

-Well-established internal communication in the company;

-Space for creativity and new perspectives;

-Continuous learning and the opportunity to develop their skills and competencies;

-Paid vacation and sick leave;

-Corporate English courses;

-Flexible work schedule;

-Interesting and driving tasks;

-And of course, a cool team and fun corporate parties.

If you feel that your skills meet these requirements, please send us your resume and cover letter for consideration. We look forward to your applications and are ready to welcome you to our team.

Company Description
 

Join Sigma Software as a Principal Software Engineer and help shape secure, large-scale digital platforms for Public Sector initiatives. This is a strategic senior-level role for an experienced engineering leader who can combine hands-on development, architecture expertise, technical leadership, and customer-facing communication.
 

You will work with enterprise-grade Java-based solutions, participate in presales and discovery activities, define technical strategies, and guide teams through project launch and early delivery stages.
 

We at Sigma Software create impactful solutions for global Customers and support our engineers with professional growth opportunities, mature engineering culture, and the ability to influence projects from the earliest stages.
 

CUSTOMER

Our Customers operate within Public Sector environment where security, reliability, scalability, and regulatory compliance are critical. The projects focus on building and modernizing enterprise digital services that support mission-critical operations, complex integrations, and long-term maintainability for large-scale organizations.
 

PROJECT

You will join early-stage initiatives where technical leadership plays a key role in transforming business ideas into scalable implementation strategies. The position involves participation in presales activities, tenders, discovery workshops, architecture design, estimation, and project launch support.

The projects include enterprise Java ecosystems, cloud-native infrastructure, distributed systems, secure integrations, and modernization of legacy platforms. You will work closely with Customers, Sales, Delivery, and engineering teams to establish architecture standards and ensure successful project initiation.

Responsibilities:

• Participate in presales activities, discovery sessions, technical workshops, tenders, and RFI/RFP analysis.
• Translate business requirements into scalable technical solutions and implementation strategies.
• Design enterprise-level architectures for Java-based distributed systems and microservices platforms.
• Prepare technical proposals, estimations, architecture diagrams, delivery assumptions, and implementation roadmaps.
• Define technology stack, infrastructure approach, integrations, security principles, and team composition.
• Present and defend technical solutions during Customer discussions and stakeholder meetings.
• Support Sales and Delivery teams during presales and project initiation phases.
• Lead technical project start-up activities and transform high-level concepts into actionable implementation plans.
• Establish architecture standards, engineering guidelines, and development best practices.
• Guide engineering teams during the first delivery stages and support onboarding and technical interviews.
• Conduct architecture and code reviews to ensure scalability, maintainability, and security compliance.
• Resolve complex technical challenges and mentor Senior and Lead Engineers.
• Drive technical decision-making while balancing business goals, delivery timelines, and quality expectations.

Requirements:

• 5+ years of software engineering experience with strong technical leadership responsibilities.
• Strong hands-on expertise in Java ecosystem development.
• Deep knowledge of Spring and Spring Boot.
• Strong understanding of microservices and distributed systems architecture.
• Experience designing and implementing REST APIs and event-driven systems.
• Practical experience with Kafka or similar messaging technologies.
• Experience with relational and NoSQL databases.
• Strong cloud platform experience with AWS, Azure, or GCP.
• Experience with Docker, Kubernetes, CI/CD pipelines, and infrastructure automation.
• Understanding of application security, monitoring, logging, and observability practices.
• Experience working with incomplete or ambiguous requirements and converting them into technical solutions.
• Experience participating in presales, discovery phases, solution proposals, or tender processes.
• Strong estimation and solution design skills.
• Excellent Customer-facing communication and presentation skills.
• Ability to independently drive technical initiatives and take ownership.
• Upper - Intermediate English level.

Приєднуйтесь до Sigma Software на позицію Principal Software Engineer та допомагайте створювати безпечні цифрові платформи великого масштабу для ініціатив у сфері Public Sector. Це стратегічна позиція senior-рівня для досвідченого інженерного лідера, який може поєднувати розробку, архітектурну експертизу, технічне лідерство та комунікацію з клієнтами.
 

Ви працюватимете з enterprise-рішеннями на базі Java, братимете участь у presales та discovery-активностях, визначатимете технічні стратегії та супроводжуватимете команди під час запуску проєктів і на ранніх етапах реалізації.

У Sigma Software ми створюємо значущі рішення для глобальних Клієнтів та підтримуємо наших інженерів можливостями професійного розвитку, зрілою інженерною культурою та можливістю впливати на проєкти з найперших етапів.
 

КЛІЄНТ

Наші Клієнти працюють у сфері Public Sector, де безпека, надійність, масштабованість та відповідність нормативним вимогам мають критичне значення. Проєкти зосереджені на створенні та модернізації enterprise-цифрових сервісів, які підтримують критично важливі операції, складні інтеграції та довгострокову підтримуваність для великих організацій.

ПРОЄКТ

Ви приєднаєтесь до ініціатив на ранніх етапах, де технічне лідерство відіграє ключову роль у перетворенні бізнес-ідей на масштабовані стратегії реалізації. Позиція передбачає участь у presales-активностях, тендерах, discovery-воркшопах, проєктуванні архітектури, оцінюванні та підтримці запуску проєктів.

Проєкти включають enterprise Java-екосистеми, cloud-native інфраструктуру, розподілені системи, безпечні інтеграції та модернізацію legacy-платформ. Ви тісно співпрацюватимете з Клієнтами, Sales, Delivery та інженерними командами для встановлення архітектурних стандартів та забезпечення успішного запуску проєктів.

Обов’язки:

• Брати участь у presales-активностях, discovery-сесіях, технічних воркшопах, тендерах та аналізі RFI/RFP.
• Перетворювати бізнес-вимоги на масштабовані технічні рішення та стратегії реалізації.
• Проєктувати архітектуру enterprise-рівня для розподілених систем та мікросервісних платформ на базі Java.
• Готувати технічні пропозиції, оцінки, архітектурні діаграми, припущення щодо реалізації та дорожні карти.
• Визначати технологічний стек, підхід до інфраструктури, інтеграції, принципи безпеки та склад команди.
• Презентувати та захищати технічні рішення під час обговорень із Клієнтами та зустрічей зі стейкхолдерами.
• Підтримувати Sales та Delivery команди під час presales та етапів запуску проєктів.
• Керувати технічними активностями на старті проєкту та перетворювати високорівневі концепції на практичні плани реалізації.
• Встановлювати архітектурні стандарти, інженерні рекомендації та найкращі практики розробки.
• Керувати інженерними командами на перших етапах реалізації та підтримувати онбординг і технічні інтерв’ю.
• Проводити архітектурні та code review для забезпечення масштабованості, підтримуваності та відповідності вимогам безпеки.
• Вирішувати складні технічні завдання та менторити Senior і Lead Engineers.
• Керувати процесом прийняття технічних рішень, балансуючи бізнес-цілі, терміни реалізації та очікування щодо якості.

Вимоги:

• 5+ років досвіду у software engineering із сильними обов’язками у сфері технічного лідерства.
• Сильна практична експертиза у розробці в Java-екосистемі.
• Глибокі знання Spring та Spring Boot.
• Глибоке розуміння архітектури мікросервісів та розподілених систем.
• Досвід проєктування та реалізації REST API та event-driven систем.
• Практичний досвід роботи з Kafka або аналогічними технологіями обміну повідомленнями.
• Досвід роботи з реляційними та NoSQL базами даних.
• Сильний досвід роботи з хмарними платформами AWS, Azure або GCP.
• Досвід роботи з Docker, Kubernetes, CI/CD pipeline та автоматизацією інфраструктури.
• Розуміння безпеки застосунків, моніторингу, логування та практик observability.
• Досвід роботи з неповними або неоднозначними вимогами та перетворення їх на технічні рішення.
• Досвід участі у presales, discovery-фазах, підготовці solution proposals або тендерних процесах.
• Сильні навички оцінювання та проєктування рішень.
• Відмінні навички комунікації та презентації у взаємодії з Клієнтами.
• Здатність самостійно вести технічні ініціативи та брати на себе відповідальність.
• Рівень англійської — Upper-Intermediate.

Unidatalab is looking for motivated and ambitious students or recent graduates who are eager to take their first step into the world of AI-driven technologies. 

About the Client:

Our client develops an AI-powered voice solution for quick-service restaurants. The product combines NLP, speech recognition, and noise-cancellation technologies to automate drive-thru ordering. As a result, restaurants can significantly reduce wait times, improve order accuracy, increase operational efficiency, and enhance overall customer satisfaction. 

👉🏻 It's a product company; you'll be fully integrated into the client team, working with them directly through Unidata.

Who We’re Looking For:

• 3rd+ year students or recent graduates in Computer Science, Software Engineering, or related fields; 
• Confident Python knowledge and readiness to work with system configurations & low-code tasks;
• Upper-Intermediate spoken English, as the role requires daily communication in English; 
• Readiness to work full-time (8 hours/day); 
• Strong soft skills: responsibility, communication, proactivity, and good organisation. 

Tech stack: Python (YAML, JSON, pytest), Poetry, Git/GitHub. 

Hiring Process:
Call with Recruiter → Small Test Task on LeetCode → Interview with the HR from the Client's side (in English) → Practical task to become familiar with the product & Client Interview (in English) → Offer. 

Why Join Us: 

• Working with the real AI product; 
• Flexible, remote-first environment; 
• Paid vacation, sick leaves & holidays.

The family-style company is looking for a talented Full-Stack Developer (Python / Angular) to join our team. If you are looking for an awesome team, send us your CV!

About the Project
The project is a SaaS platform developed by a Polish company for healthcare visit scheduling and field service management. It focuses on optimizing workflows, managing visits, and enabling efficient communication through real-time features and system integrations.

What We’re Looking For:

• Python / Django: Experience with Django, DRF, and Django Ninja backend development
• PostgreSQL: Strong knowledge of relational databases and data modeling

Nice-to-Have:

• GraphQL / Real-Time: Hasura, Apollo Client, Redis, Django Channels, WebSockets
• Experience with Front-End frameworks such as Vue.js, React, or Angular
• DevOps: Docker, Docker Compose, GitLab CI/CD, OpenTelemetry
• Native Mobile (Bonus): Swift/iOS or Java/Android experience, especially with Capacitor plugins, video calling, and push notifications
• Third-Party Integrations: Twilio, Firebase, APNS, healthcare SOAP/XML APIs
• Analytics: SalesManago SDK

What we offer

• Opportunity to work remotely, or in a hybrid format
• Flexible schedule, start your workday anytime between 08:00 and 11:00, whatever works best for you
• Work equipment provided (if needed)
• Minimal bureaucracy, focus on work.
• Conferences, meetups (we support your professional growth)
• Sane and polite, but effective management
• The best corporate culture (according to our teammates' opinions)
• Competitive salary and other stuff
• Becoming a part of UKAD with unique value and long-term relationships
  
  Some facts about UKAD to help you make a decision

During 2022-2025, we only increased cooperation with our foreign partners

UKAD combines the benefits of family-sized companies, like no bureaucracy, easy access to the executives, with sustainable growth and vast opportunities

Our company is strong enough to be not just a vendor but a tech partner. We can afford to choose customers that respect developers

UKAD is one of the leading employers in Kharkiv, according to DOU

We never hire people for projects, but to build the team, so if the project ends, you remain a part of UKAD.

Aren't we the company you're looking for?

About the Role

Our promotional features team is seeking a Senior Backend Engineer. This role is focused on developing and optimizing promotional features for our gaming platforms, where performance, scalability, and cutting-edge solutions are paramount.
If you’re a product-passionate person, your mind is keen to solve deep tech engineering problems, and you have a fast "PoC first" approach with a deep sense of ownership, we would love to hear from you.

Key Responsibilities

• Develop and maintain robust backend systems for our promotional features.
• Optimize existing systems for enhanced performance and scalability.
• Lead technical decisions and contribute to our SaaS solutions.
• Collaborate with distributed teams to innovate and implement new features.
• Ensure code and architectural excellence through reviews.
• Address complex technical challenges with innovative solutions.
• Participating in on-call rotations within the squad to help ensure the reliability and availability of our systems.

Requirments

• Strong proficiency in Node.js and TypeScript (our primary backend stack). We’re also open to strong backend engineers from other ecosystems (e.g., Go, Java, C#, C++) who are ready to ramp up quickly.
• Strong understanding of asynchronous programming and concurrency patterns.
• Experience building distributed systems and working with messaging and coordination tools (e.g., Kafka, RabbitMQ, NATS, distributed locks).
• Experience with gRPC in production environments.
• Solid knowledge of databases: relational (MySQL, PostgreSQL), columnar (ClickHouse), and NoSQL (DynamoDB, MongoDB).
• Experience with cloud platforms (AWS/GCP/Azure) and Kubernetes.
• Skilled in building and maintaining unit and end-to-end tests.
• Proven track record of delivering production-ready solutions.
• Experience working with large-scale microservices architectures.
• Degree in Computer Science or a related field (or equivalent practical experience).

Nice to Have

• Understanding of enterprise development patterns
• Experienced with large-scale microservices architecture
• Experience with cloud providers (AWS, GCP, etc.)
• Active performance observation
• Gambling domain experience
• Understanding of application security and industry standards, its best practice
   

What We Offer

• Competitive Salary
• Quarterly Bonuses
• Unlimited Paid Time Off
• Unlimited Paid Sick Leave
• Remote & Flexible Working
• Private Medical Insurance
• Financial Support for Life Events
• Professional Development Budget
• International Exposure
• Regular Company Events

*Benefits may vary depending on location and contractual agreement
 

Recruitment Process

• HR interview
• Technical interview (with Live coding)
• Final interview

Please take into account that sometimes the process may differ, your TA Partner will keep you updated.

AsiaFinance Group is a fast-growing group of fintech companies operating in Asia. Our core business is digital consumer lending.

Position: Java Developer 
Location: Remote (Global)
Reported to: Chief Product Officer

About the Role

As a Middle–Senior Java Developer, you will be responsible for designing, developing, and maintaining backend services that power our lending platforms and internal systems. You will work closely with product, engineering, and infrastructure teams to deliver high-quality software while contributing to architecture decisions, system reliability, and continuous improvement initiatives.

This role is ideal for an experienced developer who enjoys solving complex technical challenges, writing clean and maintainable code, and working in a remote, international environment.

What You'll Do

• Design, develop, and maintain backend applications and services using Java and Spring Framework.
• Build scalable, secure, and high-performance APIs and business services.
• Participate in system design, code reviews, and technical discussions.
• Write clean, maintainable, and well-tested code following software engineering best practices.
• Develop and maintain integrations with internal and external systems.
• Optimize application performance, database queries, and system reliability.
• Implement caching, monitoring, logging, and observability solutions.
• Support production deployments, troubleshooting, and incident resolution.
• Collaborate with Product Managers, QA Engineers, DevOps Engineers, and other developers throughout the software development lifecycle.
• Contribute to technical documentation, architecture improvements, and coding standards.
• Participate in Agile development processes, sprint planning, and retrospectives.
• Continuously improve code quality, development practices, and team efficiency.

What We're Looking For

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• Strong experience with Java 11+ and Spring Framework (Spring Boot, MVC, Data, Security).
• 4+ years of commercial Java development (Java 11+)
• OOP and SOLID principles — applied daily, not just understood theoretically
• Clean code and refactoring discipline — we improve the codebase, not just add to it
• TDD mindset: unit and integration tests are part of done, not an afterthought
• SQL and relational databases — writing, reviewing, optimising queries and schemas
• REST API integrations — consuming and exposing
• Caching strategies — Redis or equivalent, knowing when and why to apply them
• Data encryption basics — at rest and in transit
• Telemetry and observability — structured logs, metrics, basic alerting
• Git — branching, PR workflow, code review participation
• CI/CD basics — pipeline awareness, build and deploy cycle familiarity
• JVM fundamentals — threading model, memory management basics
• Linux comfort — reading logs, basic shell, deployment tasks

Nice to Have

• Experience with AWS services such as EC2, RDS, S3, and load-balanced environments.
• Familiarity with message brokers, distributed systems, and microservices architecture.
• Experience with monitoring and observability tools such as Grafana, Kibana, or similar platforms.
• Previous experience in fintech, financial services, or high-availability production systems.
• Experience working in distributed international teams.

Why Join Us

• International team with a flat, Western-style corporate culture
• Real ownership across the full BA and QA lifecycle from day one
• Fast career progression in a high-growth, cross-border fintech environment
• Collaborative, energetic team with frequent cross-functional interaction

Numerical Technologies LTD is a provider of custom software solutions and services specializing in risk, limits, and regulatory capital. We are currently looking for a Senior Python Developer to join our team. 
 

Project: Portfolio management systems for a US financial institution. 

What you will be doing:  

As part of the team, you will be participating in a client project focused on portfolio management solutions. You will help develop new software features, as well as support and maintain existing ones. You will be writing scalable and fault-tolerant code, debugging programs, and integrating applications with third-party web services. You will be collaborating closely with the client and product manager to understand the system’s functional and non-functional requirements, and contribute to code quality through unit testing, integration testing, code review, and system design using Python to build robust software that aligns with the client’s business needs. 

What we are looking for:  

• A strong programming background with Python and OOP skills.
• Deep understanding of algorithms and data structures.
• Experience building backend systems and working with REST APIs.
• Proficiency with SQL databases.
• Experience with FastAPI and Linux environments.
• Strong problem-solving skills and ability to collaborate effectively in a team environment.
• Upper-Intermediate level of English or above. 
• Experience with React and AWS is a plus. 

What we offer: 

• Competitive compensation depending on experience and skills. 
• Regular assessments and salary reviews. 
• Paid personal days. 
• Mental health support program. 
• Language classes. 
• Flexible working schedule. 

Join a Company That Invests in You

Seeking Alpha is the world’s leading community of engaged investors. We’re the go-to destination for investors looking for actionable stock market opinions, real-time market analysis, and unique financial insights. At the same time, we’re also dedicated to creating a workplace where our team thrives. We’re passionate about fostering a flexible, balanced environment with remote work options and an array of perks that make a real difference.

Here, your growth matters. We prioritize your development through ongoing learning and career advancement opportunities, helping you reach new milestones. Join Seeking Alpha to be part of a company that values your unique journey, supports your success, and champions both your personal well-being and professional goals.

What We're Looking For

Role Overview: You will take ownership of the search infrastructure for Ask Seeking Alpha — a financial intelligence platform powered by LLMs. Your main goal is to ensure our AI agents can find the exact financial data they need (articles, transcripts, news) in milliseconds. You will work on the Retrieval layer of our RAG architecture, combining traditional text search with modern vector search techniques.

Tech Stack: Elasticsearch (v8+), Python (FastAPI, Asyncio), OpenAI Embeddings, LangChain, LangSmith.

The Senior Search Engineer will be engaged with the company as a contractor (Private Entrepreneur).

What You'll Do

• Search Engine Development: Design and implement Hybrid Search strategies. You will figure out how to best combine "keyword matching" (finding specific tickers like 'AAPL') with "semantic search" (finding concepts like 'revenue growth').
• Relevance Tuning: You are responsible for the quality of search results. You will build systems to measure and improve how well the search engine answers user queries (using tools like LangSmith).
• Vector Search & RAG: Manage the integration of OpenAI embeddings into Elasticsearch. You will solve challenges related to indexing long documents (e.g., earnings transcripts) so the AI retrieves only the most relevant parts.
• Performance Optimization: Optimize Elasticsearch queries and index settings to ensure low latency, even for complex queries with many filters.
• Python Backend: Develop and maintain the Python services that build queries and process results. We use FastAPI and Asyncio heavily.

Requirements

• Elasticsearch Expert: 5+ years of experience working with Search Engines in production. You understand how indices, analyzers, and mappings work "under the hood."
• Search Theory: You understand the difference between Lexical Search (keywords) and Vector Search (meaning), and know when to use which.
• Python Proficiency: Strong experience with Python 3.10+. You are comfortable writing asynchronous code (async/await) and building APIs.
• Data Engineering: Experience designing data schemas for search (how to structure JSON documents for efficient retrieval).

Nice to Have

• Experience building RAG (Retrieval-Augmented Generation) pipelines.
• Familiarity with LangChain or similar LLM frameworks.
• Experience with Evaluation tools (like LangSmith) to test search quality automatically.
• Background in Finance (understanding tickers, earnings calls, etc.).