Jobs Java

dentsu Ukraine — українська частина глобальної мережі dentsu, що об’єднує бренди Carat, iProspect, dentsu X, Amplifi та інші. Технологічний підрозділ розробляє власні рекламно-технологічні продукти, якими користуються медіа-агенції та клієнти групи: системи моніторингу реклами, верифікації виконання медіапланів, синхронізації даних між десятками рекламних провайдерів та аналітичних платформ.

Зараз ми переходимо на нове покоління наших платформ — мігруємо застарілі сервіси на повноцінну архітектуру Spring Boot / Spring Cloud у середовищі Azure.

Пріоритет — ветерани ЗСУ та інших складових Сил оборони.

Це не риторика й не маркетинговий жест. Логіка проста й чесна: для невеликої технологічної команди, яка відповідає за критичні системи групи, нам передусім важлива кадрова стабільність. Ветеран — це людина, з якою ми можемо планувати роботу на роки вперед, без ризику переривання робочого циклу посеред важливого етапу робіт.

Якщо ви — ветеран і відповідаєте технічним вимогам нижче, надсилайте резюме: воно йде у пріоритетну чергу розгляду. Ми готові гнучко підходити до питань реабілітації, графіка, медичних обмежень. Додаткові підтвердження статусу на етапі співбесіди не вимагаємо — посвідчення УБД достатньо.

Резюме без ветеранського статусу теж розглядаємо — після того, як опрацюємо пріоритетну чергу.

Стек

Базовий:

• Java 21
• Spring Boot 3.x, Spring Cloud
• Spring Data JPA, Hibernate, Flyway
• Gradle
• JUnit 5, Testcontainers

База даних: Azure SQL Database (Microsoft SQL Server). Тільки MS SQL — досвід з іншими СКБД є плюсом, але не замінює знання MS SQL.

Інфраструктура та DevOps: Azure (AKS, Bicep, Azure DevOps Pipelines). Деталі стеку обговоримо на співбесіді.

Інструменти: JetBrains All Products Pack, ChatGPT/Claude/Cursor — усе, що потрібно для нормальної роботи, ми надаємо без бюрократії.

Що ми очікуємо від кандидата

Обов’язкові вимоги:

• Ветерани СОУ/ЗСУ мають пріоритет у процесі відбору кандидатів.
• 3+ роки комерційної розробки на Java
• Впевнене володіння Spring Boot, Spring Data, Spring Security
• REST API, JSON, OpenAPI — на рівні щоденної практики
• MS SQL: не лише написання запитів, а й розуміння планів виконання, індексів, транзакцій та рівнів ізоляції
• Досвід із системами обміну повідомленнями (Kafka, RabbitMQ, Event Hubs — будь-яка з перерахованих)
• Docker, базове розуміння контейнеризації
• Розуміння паралельної обробки у JVM

• Англійська на рівні читання технічної документації та письмового спілкування (B1+)

   

Бажані вимоги (буде плюсом, але не критично — за 3–4 місяці на простіших проєктах ви це підтягнете):

• Базовий досвід з Azure (на рівні: розгортали щось у Azure, працювали з Azure DevOps Pipelines)
• Spring Cloud (Gateway, Config Server, Resilience4j)
• k8s на практичному рівні
• Bicep або принаймні ARM templates

• Досвід у галузі рекламних або маркетингових технологій

   

Що ми пропонуємо

• $3000–3500 net — обговорюється індивідуально за результатами технічної співбесіди
• Робота над реальною технічно складною системою — а не черговий типовий вебсайт чи рутинне додавання форм
• JetBrains All Products Pack та необхідні AI-інструменти
• Гнучкий графік, повністю віддалена або гібридна робота (Київ)
• Офіційне працевлаштування, оплачувана відпустка та лікарняні
• Соціальний пакет dentsu Ukraine

• Реальний вплив на архітектурні рішення: ваші пропозиції чути, а не “беремо до уваги”

   

Очікуємо на Ваші резюме!

Delasport — Implementing Technological Solutions Here and Now

Delasport is an iGaming software company providing Sports Betting & Online Casino software and turnkey B2B solutions. Since 2010, we have made a significant impact on the industry, earning awards and expanding our global presence. With offices in Bulgaria, Ukraine, and Malta, our team of more than 500 experts continues to drive innovation and strive for excellence. We are looking for top talent to join our R&D center in Kyiv.

The Product Launch team is built for people who don’t just maintain systems but create them. We take products from zero to hero, and scale them until they’re strong enough to be handed over to core teams. No legacy constraints. No endless support cycles. Just greenfield builds, modern tech, and real ownership from day one.

We move fast, think lean, and execute with focus, one product at a time, full commitment, full impact. Every sprint matter, every decision ship value. This is not a support team. It’s a build-from-scratch engine for products that matter, because every hero needs a superhero.

RESPONSIBILITIES

• Design and build backend services and APIs from the ground up — powering brand-new products from initial concept to production
• Own technical decisions early in the product lifecycle, shaping architecture, data models, and service boundaries without legacy constraints
• Develop scalable, high-performance systems using modern Java technologies, designed to evolve quickly as products gain traction
• Work closely with product, design, and frontend teams to define and deliver features — contributing to what gets built, not just how
• Move fast and ship often — iterating on real user feedback and continuously improving the product as it grows
• Lay the foundation for long-term scalability and reliability, ensuring each product is ready to be handed over to core teams
• Drive engineering excellence through clean design, pragmatic decisions, and high-quality code, even under fast-paced delivery cycles
• Support and mentor teammates through hands-on collaboration, helping raise the bar while building impactful products together
•  

REQUIREMENTS

• 5+ years of backend development experience with strong expertise in Java and object-oriented design
• Solid knowledge of design patterns, system architecture, and scalability principles
• Hands-on experience with databases (SQL/NoSQL) and message-driven systems (e.g., Kafka, RabbitMQ)
• Familiar with containerization and orchestration (Kubernetes, Docker)
• Comfortable with automated testing (unit, integration, performance)
• Proven track record building and supporting production-grade, high-load systems
• Thrive in a dynamic, fast-changing environment with shifting priorities
• Strong communicator with a proactive, ownership-driven mindset.

• At least Upper-Intermediate English level

   

WHAT WE CAN OFFER YOU

• Modern office in Podil with an uninterruptible power supply and the Internet
• Personal time off (21 business days of paid vacation, paid days on special occasions, sick leaves, emergency days off)
• Public holidays
• Health and life insurance with our broker, available starting from the month following the employee’s start date with the company
• Modern technical equipment
• English courses with native speakers
• Ukraine-based educational programs
• Sports activities reimbursement
• Corporate entertainments
• Happy hours on Fridays
• Gig contract support

Company Description

Miratech helps visionaries change the world. We are a global IT services and consulting company that brings together enterprise and start-up innovation. Today, we support digital transformation for some of the world's largest enterprises. By partnering with both large and small players, we stay at the leading edge of technology, remain nimble even as a global leader, and create technology that helps our clients further enhance their business. We are a values-driven organization and our culture of Relentless Performance has enabled over 99% of Miratech's engagements to succeed by meeting or exceeding our scope, schedule, and/or budget objectives since our inception in 1989. 
Miratech has coverage across 5 continents and operates in over 25 countries around the world. Miratech retains nearly 1000 full-time professionals, and our annual growth rate exceeds 25%.

Job Description

We are looking to hire a Senior Java Developer who will take part in development and maintenance services for customized software solutions for large European customer, a provider of innovative software solutions for the public sector.
The client is a technology service provider specializing in digital solutions for public sector organizations. The company focuses on developing secure, scalable platforms that support administrative processes, data management, and digital transformation initiatives.

The project includes software application development in the tax administration domain. The system under development is the tax administration system that covers taxation processes in one of the European countries. This is the complex system that covers the full life-cycle of tax declarations processing and tax calculations and assessments that included integration with multiple external systems. The project team consist of 20+ people.

Responsibilities:

• Implement software components according to the design specifications
• Perform system integration and testing, problem troubleshooting, and resolution
• Perform unit testing of software components
• Participate in estimating project efforts and delivery timelines
• Proactively collaborate with teammates and communicate with the Project Stakeholders to ensure that the Project efforts proceed efficiently and with predictability
• Provide technical input into product roadmaps
• Participate in triage activities (incident analysis and prioritization)

• Support and optimize CI/CD processes

   

Project Tech Stack 
Backend (Java): Spring, Quarkus. Frontend: Angular (latest versions)
Data & Integration: PostgreSQL,RESTEasy, Hibernate / Panache, Kafka
Architecture, DevOps & Tools: Microservices, Maven, Flyway, Docker, Kubernetes, GitLab, Jira, ArgoCD, Grafana

Qualifications

• 6+ years of experience in Java development
• Strong experience with Spring Framework, Quarkus
• Understanding of microservices architecture and containers (Docker/Kubernetes)
• Experience with relational databases (PostgreSQL or other RDBMS)
• Experience with REST/SOAP integrations and messaging (Kafka, ActiveMQ)
• Good understanding of testing principles

• Ability to communicate confidently in English

   

Additional Information

We offer:

• Culture of Relentless Performance: join an unstoppable technology development team with a 99% project success rate and more than 30% year-over-year revenue growth.
• Competitive Pay and Benefits: enjoy a comprehensive compensation and benefits package, including health insurance, and a relocation program.
• Work From Anywhere Culture: make the most of the flexibility that comes with remote work.
• Growth Mindset: reap the benefits of a range of professional development opportunities, including certification programs, mentorship and talent investment programs, internal mobility and internship opportunities.
• Global Impact: collaborate on impactful projects for top global clients and shape the future of industries.
• Welcoming Multicultural Environment: be a part of a dynamic, global team and thrive in an inclusive and supportive work environment with open communication and regular team-building company social events.

• Social Sustainability Values: join our sustainable business practices focused on five pillars, including IT education, community empowerment, fair operating practices, environmental sustainability, and gender equality.

   

* Miratech is an equal opportunity employer and does not discriminate against any employee or applicant for employment on the basis of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity, or any other protected status under applicable law.

We are looking for an experienced Senior Backend Engineer to join a fast-growing product company and help build scalable backend services, core platform capabilities, and new product features used by customers worldwide.

As part of a highly collaborative engineering team, you will take ownership of backend solutions from design to production, contribute to architectural decisions, and help ensure the reliability and performance of mission-critical systems.

Responsibilities

• Design, develop, and maintain backend services and APIs using Java.
• Build and deliver end-to-end features and new platform capabilities.
• Collaborate closely with product managers and engineering teams.
• Participate in architectural discussions and technical decision-making.
• Ensure service reliability, scalability, and performance.
• Participate in on-call rotations and production support activities.
• Contribute to engineering best practices, knowledge sharing, and continuous improvement.

Requirements

• 5+ years of hands-on experience in Java backend development.
• Strong experience with relational databases and SQL.
• Experience designing and developing RESTful APIs and web services.
• Solid understanding of Linux-based environments.
• Experience working in Agile development teams.
• Passion for writing clean, maintainable, and reusable code.
• Self-motivated, proactive, and results-driven mindset.
• B.Sc. in Computer Science or equivalent practical experience.

Nice to Have

• Experience with microservices architecture and distributed systems.
• Experience building and scaling highly available applications.
• Hands-on experience with caching technologies such as Redis or Memcached.
• Experience with messaging systems (RabbitMQ or similar).
• Familiarity with reactive frameworks such as Spring WebFlux or RxJava.
• Experience with Kafka, Spark, or other streaming/data-processing platforms.
• Experience with parser generators such as ANTLR or JavaCC.

We are helping our partner — a fast-growing product company in the iGaming space — find a Middle Java Developer to join their backend team.

This is a product environment where backend engineering directly impacts platform stability, scalability, and business growth.

You won’t just “close tickets.” You’ll work on real systems, real architecture, and real technical challenges.

What this role is really about

You’ll be working on a high-load platform where:

• systems process real-time events;
• performance and reliability matter daily;
• backend services must scale under heavy load;
• technical decisions affect the whole product ecosystem.

The team builds and develops services end-to-end, with a strong engineering mindset and ownership culture.

What you’ll be doing

• Develop and improve backend services.
• Work with microservices architecture.
• Participate in technical discussions and solution design.
• Solve performance and scalability challenges.
• Collaborate closely with developers, QA, and product teams.
• Support and improve existing services while building new functionality.
• Take ownership of your work and engineering decisions.

What we’re looking for

• 3+ years of commercial experience with Java.
• Strong practical experience with:
  • Spring Boot;
  • PostgreSQL;
  • Kafka or similar messaging systems.
• Experience working with microservices.
• Good understanding of distributed systems principles.
• Experience with SQL and NoSQL databases.
• Experience with AWS or Kubernetes will be a plus.
• gRPC — nice to have.

But more importantly:

• You think beyond tasks.
• You can explain your technical decisions.
• You are proactive and structured in your work.
• You care about quality, not only delivery speed.

What you get

• Product company environment (not outsourcing).
• Real impact on the product and technical decisions.
• Strong engineering team and mature processes.
• Complex backend challenges and high-load systems.
• Remote work format.
• Fast-growing iGaming product with global scale opportunities.

Are you interested in working with cutting-edge technologies and developing high-performance applications capable of handling over 2 million data queries per second? If so, we have the perfect job for you at LoopMe! 

We are a team of skilled engineers who develop and maintain real-time bidding platforms for global advertisers. As part of our team, you will work alongside other talented engineers on a daily basis, using technologies such as Java, Postgres, Clickhouse, Kafka, and others to scale performance, optimize cloud infrastructure, and create innovative features for our various product lines. At LoopMe, we follow Agile methodology to deliver features rapidly to the market. 

Join us and be a part of our mission to push the boundaries of what is possible in the advertising industry!
 

What we need

We are looking for a Senior Java Backend Engineer to help build out our high-load ad serving system, capable of handling over 2M requests/second under 50ms response time.
 

What you'll be doing

• Developing features and performance optimisation for our Java ad-serving application
• Implementing complex targeting algorithms developed by our data science team into the core ad-serving flow
• Implementing backend for BI ad-hoc queries
   

Must have skills

• Java 17+ (Spring Boot, Gradle)
• REST API design and implementation
• SQL (PostgreSQL) + experience with schema migrations
• Experience with microservices architecture
• Production experience with GCP or similar cloud platform

Strong testing practices (unit + integration

Nice-to-have

• GraphQL (consumer or provider side)
• OpenRTB / ad tech domain knowledge
• Kubernetes / GKE
• Experience with event-driven systems
• AI/agentic coding tools (Claude Code, Copilot)

Soft skills

• Can operate independently on ambiguous problems
• Comfortable working with a distributed team (Ukraine, Poland, UK)
• Willing to mentor mid-level BE devs

Benefits:
 

• Competitive compensation package
• Flexible working schedule and the hybrid type of work
• Annual performance bonus (up to 10%)
• One month of workation (you can work from any part of the world for one month)

To all recruitment agencies: LoopMe does not accept agency resumes. Please do not forward resumes to our jobs career page, LoopMe employees or any other company location. LoopMe is not responsible for any fees related to unsolicited resumes.

A global marketplace for savings and investments, providing users with seamless access to high-yield savings accounts and investment options from over 400 partner banks worldwide. The platform removes geographic barriers while ensuring transparency, convenience, and competitive rates. For banks, it delivers cost-efficient deposit funding and innovative Banking-as-a-Service solutions. The team is responsible for the integration of transaction accounts, hosted via our servicing banks, into the Raisin platform. They ensure smooth funding across all products, correctly routing incoming and outgoing payments to their intended destinations. The team consists of 10 members working collaboratively in a cross-functional setup.

Responsibilities:

• Deliver core services and high-quality solutions for a large-scale online platform and its banking systems.
•  Integrate externally developed components into existing applications.
• Define standards, share best practices, and contribute to continuous learning within the team.
• Perform software engineering tasks with a strong focus on quality and support teammates in maintaining the same standards.
• Conduct thorough code reviews, covering best practices, business rules, performance, security, and impact on other features/projects, always providing constructive and respectful feedback.
• Collaborate within the team to negotiate and document software development standards and practices.
• Research and propose multiple technical solutions whenever possible.
• Take end-to-end ownership of project delivery within the team.
• Maintain and manage technical documentation and address technical debt proactively.
• Participate in the hiring process through tech-fit interviews and technical challenge evaluations.

Requirements:

• 6+ years of overall software development experience.
• Minimum 5 years of experience with Java and Spring Boot.
• Strong understanding and hands-on application of design patterns.
• Practical experience with testing practices (unit, integration) using tools such as JUnit, Mockito, TestContainers.
• 4+ years of experience with AWS Services, Kubernetes, event-driven architectures (Kafka or ActiveMQ), Spring Boot, SQL, and NoSQL.
• Excellent communication skills with the ability to articulate challenges and solutions clearly.
• Proven team player who collaborates effectively and supports shared goals.
• Strong critical thinking and problem-solving skills, with the ability to analyze production issues and design robust solutions (highly desirable).
• Proactive in supporting teammates and driving technical improvements (strongly preferred).
• High responsibility when working with payments, as this is a critical, core functionality for the company.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits

*not applicable for freelancers

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

About the Product:

Over the past few years Coro has received $275M in funding and is one of the fastest growing Cybersecurity companies in the world. The funding is primarily being used to enhance the Coro Cybersecurity SaaS platform and for additional headcount growth, as Coro continues to expand globally.   

Coro started in Tel-Aviv, Israel and is also headquartered in Chicago, IL with additional offices in New York, London, and remotely across the globe. As a global organization, Coro gives you the ability to work with people and teammates from around the world. 

Coro’s AI enabled Modular Cybersecurity Platform is the only one in the industry specifically designed to provide Mid-Market customers with scalable and affordable “enterprise grade” protection for all of their priority threat vectors. 

About the Role:

This is a hands-on leadership role for a Backend Team Lead who will guide a team of backend engineers while staying directly involved in coding, architecture, and delivery. You will work on core backend systems behind Coro’s cybersecurity platform, building and scaling high-load services that process large volumes of security and telemetry data in real time.

These systems are responsible for collecting, processing, and analyzing data from multiple sources, including endpoints, cloud environments, and product integrations. They support critical product capabilities such as threat detection, security analytics, anomaly identification, and automated response workflows, making this a mission-critical leadership role at the core of Coro’s product.

If you are looking for a role where you can combine leadership with technical ownership, shape team culture, and build highly scalable backend services for a fast-growing global cybersecurity platform, this is the role for you

Key Responsibilities:

• Lead a team of highly skilled and passionate developers
• Partner with the Product Manager to build the road-map for the team
• Understand the team objectives and key results and make sure that the team are on the path to achieving them
• Participate in making decisions on the architecture and technologies
• Conduct the team ceremonies: Daily stand-ups, sprint planning and retro meetings
• Help create and enforce strong engineering standards, code quality, and best Engineering practices
• Take an active part in the implementation (hands-on) of the team’s various services and features
• Help your team members grow by mentoring them, building their growth plan with them and enable them opportunities to implement it

Required Competence and Skills:

• 6+ years of backend/server-side development with Java
• 2+ years of proven experience leading an engineering team 
• Strong hands-on experience with Spring Framework and MongoDB
• Deep understanding of multithreading and concurrency
• Solid knowledge of OOP concepts and design patterns
• Proven experience with microservices architecture
• Experience working with high-load backend systems
• Proficiency in cloud-native environments (preferably AWS)

Nice to have:

• Experience with Redis and RabbitMQ
• Experience with Elasticsearch/OpenSearch 
• Familiarity with Docker / Kubernetes
• Experience in Cybersecurity domain 

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

About the Product:

The company is building an AI-driven cybersecurity SaaS platform designed to help businesses protect their digital environments through a unified and modular approach. Its solution integrates multiple layers of security, including endpoint protection, cloud monitoring, data security, and user activity analysis, all managed within a single ecosystem. With a focus on mid-sized organizations, the platform delivers scalable, enterprise-grade protection while remaining cost-effective and easy to deploy. 

Backed by significant investment, the company is rapidly expanding its global footprint and growing a distributed international team. By leveraging advanced machine learning and real-time analytics, it enables organizations to streamline security operations, automate threat detection, and respond to incidents more efficiently. 

About the Role:

This is a hands-on leadership role for a Backend Team Lead who will guide a team of backend engineers while staying directly involved in coding, architecture, and delivery. You will work on core backend systems behind Coro’s cybersecurity platform, building and scaling high-load services that process large volumes of security and telemetry data in real time.

These systems are responsible for collecting, processing, and analyzing data from multiple sources, including endpoints, cloud environments, and product integrations. They support critical product capabilities such as threat detection, security analytics, anomaly identification, and automated response workflows, making this a mission-critical leadership role at the core of Coro’s product.

If you are looking for a role where you can combine leadership with technical ownership, shape team culture, and build highly scalable backend services for a fast-growing global cybersecurity platform, this is the role for you

Key Responsibilities:
 

• Lead a team of highly skilled and passionate developers
• Partner with the Product Manager to build the road-map for the team
• Understand the team objectives and key results and make sure that the team are on the path to achieving them
• Participate in making decisions on the architecture and technologies
• Conduct the team ceremonies: Daily stand-ups, sprint planning and retro meetings
• Help create and enforce strong engineering standards, code quality, and best Engineering practices
• Take an active part in the implementation (hands-on) of the team’s various services and features
• Help your team members grow by mentoring them, building their growth plan with them and enable them opportunities to implement it

Required Competence and Skills:

• 6+ years of backend/server-side development with Java
• 2+ years of proven experience leading an engineering team 
• Strong hands-on experience with Spring Framework and MongoDB
• Deep understanding of multithreading and concurrency
• Solid knowledge of OOP concepts and design patterns
• Proven experience with microservices architecture
• Experience working with high-load backend systems
• Proficiency in cloud-native environments (preferably AWS)

Nice to have:
 

• Experience with Redis and RabbitMQ
• Experience with Elasticsearch/OpenSearch 
• Familiarity with Docker / Kubernetes
• Experience in Cybersecurity domain 

We are looking for an experienced Senior Java Full Stack Engineer to join our development team.

Our customer – integrated Shipping Services has set itself apart as an independent carrier with a fresh, unique approach. His strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services, and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much-needed alternative to customers concerned about the current alliance-dominated market.

Responsibilities:

• Hands-on full-stack development of innovative applications
• Owning the entire development cycle, including design, architecture, development, and DevOps
• Working in XP with Remote pairing
•  

Requirements:

• BS degree in Computer Science or equivalent combination of education and experience
• 5-6+ years of full-stack development
• 5-6+ years of experience in the following technologies: Java, Spring
• Experience with Functional Programming and Java Streams
• 2+ years of experience in front-end development with React
• Experience with developing a reactive UI (Reactive JS)
• 2+ years of experience in TDD/BDD development in the following frameworks: Junit, Jasmin, Mockito, Protractor/Selenium
• 2+ years of experience in micro-services-based architecture and tools (Spring Boot/Cloud)
• Experience in DevOps development and Jenkins
• Experience in development in Kotlin – an advantage
• Experience in designing, developing, and deploying cloud/hybrid-based solutions
• Experience in developing and deploying in container-based environments (Kubernetes, Cloud Foundry)
• Familiarity with the following design concepts: micro-services, service discovery, circuit breaker
• Self-starter with the ability to appropriately prioritize and plan complex work in a rapidly changing environment
• Versatility and the capability to switch easily between different tasks and technologies
• Experience in assessing a broad range of information solutions and products
• Strong critical thinker with problem-solving aptitude
• Good English - verbal and written

Who we are:

Adaptiq is a technology hub specializing in building, scaling, and supporting R&D teams for high-end, fast-growing product companies in a wide range of industries. 

About the Product: 

The company is building an AI-driven cybersecurity SaaS platform designed to help businesses protect their digital environments through a unified and modular approach. Its solution integrates multiple layers of security, including endpoint protection, cloud monitoring, data security, and user activity analysis, all managed within a single ecosystem. With a focus on mid-sized organizations, the platform delivers scalable, enterprise-grade protection while remaining cost-effective and easy to deploy. 

Backed by significant investment, the company is rapidly expanding its global footprint and growing a distributed international team. By leveraging advanced machine learning and real-time analytics, it enables organizations to streamline security operations, automate threat detection, and respond to incidents more efficiently.

About the Role: 

This is a hands-on leadership role for a Backend Team Lead who will guide a team of backend engineers while remaining actively involved in coding, architecture, and delivery. You will work on core backend systems of a modern cybersecurity platform, building and scaling high-load services that process large volumes of security and telemetry data in real time.

These systems are responsible for collecting, processing, and analyzing data from multiple sources, including endpoints, cloud environments, and third-party integrations. They support key product capabilities such as threat detection, security analytics, anomaly identification, and automated response workflows, making this a mission-critical role at the heart of the product.

This role offers the opportunity to combine leadership with deep technical involvement, influence system architecture, shape engineering practices, and build scalable backend solutions within a fast-growing, globally distributed product organization

Key Responsibilities: 

• Lead a team of highly skilled and passionate developers
• Partner with the Product Manager to build the road-map for the team
• Understand the team objectives and key results and make sure that the team are on the path to achieving them
• Participate in making decisions on the architecture and technologies
• Conduct the team ceremonies: Daily stand-ups, sprint planning and retro meetings
• Help create and enforce strong engineering standards, code quality, and best Engineering practices
• Take an active part in the implementation (hands-on) of the team's various services and features

• Help your team members grow by mentoring them, building their growth plan with them and enable them opportunities to implement it

   

Required Competence and Skills:

• 6+ years of backend/server-side development with Java
• 2+ years of proven experience leading an engineering team 
• Strong hands-on experience with Spring Framework and MongoDB
• Deep understanding of multithreading and concurrency
• Solid knowledge of OOP concepts and design patterns
• Proven experience with microservices architecture
• Experience working with high-load backend systems
• Proficiency in cloud-native environments (preferably AWS)

Nice to have:

• Experience with Redis and RabbitMQ
• Experience with Elasticsearch/OpenSearch 
• Familiarity with Docker / Kubernetes
• Experience in Cybersecurity domain 

Why Us?

We provide 20 days of vacation leave per calendar year (plus official national holidays of a country you are based in).

We provide full accounting and legal support in all countries we operate.

We utilize a fully remote work model with a powerful workstation and co-working space in case you need it.

We offer a highly competitive package with yearly performance and compensation reviews.

We are looking for a Senior or Lead Software Development Engineer to join a cloud data platform initiative focused on managed Kafka connectors. The role centers on accelerating onboarding of first-party connectors, improving reliability and launch readiness, and helping expand a managed connector ecosystem used in data-intensive cloud services.

Tasks

• Accelerate onboarding of new first-party managed Kafka connectors;
• Improve connector quality, reliability, and operational readiness;
• Integrate authentication and platform-specific cloud requirements;
• Translate connector behavior into implementation details, UI specs, and documentation inputs;
• Support launch gates such as probers, load testing, playbooks, and launch reviews.

Responsibilities

• Strong Java experience, as the core workers and connectors are implemented in Java;
• Practical Go experience for API-facing changes and service integration work;
• Practical experience with GCP cloud;
• Experience integrating, debugging, and improving connector-based or data integration systems;
• Ability to work across performance, stability, authentication, and network-compatibility concerns;

• Strong engineering ownership across delivery, launch readiness, and operational quality.

   

Nice to Have:

• Experience with Kafka Connect ecosystems;
• Experience with CDC-oriented connectors or sink/source integrations;

• Exposure to cloud data systems such as BigQuery, Spanner, Bigtable, Iceberg, or Debezium-based workflows.

   

Engagement Type

• B2B contract.

   

Location / Timezone

• Priority location is Krakow, Poland;
• On-site presence at the Akvelon office

We are looking for a Senior or Lead Software Development Engineer to join a cloud data platform initiative focused on managed Kafka connectors. The role centers on accelerating onboarding of first-party connectors, improving reliability and launch readiness, and helping expand a managed connector ecosystem used in data-intensive cloud services.

Tasks

• Accelerate onboarding of new first-party managed Kafka connectors;
• Improve connector quality, reliability, and operational readiness;
• Integrate authentication and platform-specific cloud requirements;
• Translate connector behavior into implementation details, UI specs, and documentation inputs;
• Support launch gates such as probers, load testing, playbooks, and launch reviews.

Responsibilities

• Strong Java experience, as the core workers and connectors are implemented in Java;
• Practical Go experience for API-facing changes and service integration work;
• Practical experience with GCP cloud;
• Experience integrating, debugging, and improving connector-based or data integration systems;
• Ability to work across performance, stability, authentication, and network-compatibility concerns;

• Strong engineering ownership across delivery, launch readiness, and operational quality.

   

Nice to Have:

• Experience with Kafka Connect ecosystems;
• Experience with CDC-oriented connectors or sink/source integrations;

• Exposure to cloud data systems such as BigQuery, Spanner, Bigtable, Iceberg, or Debezium-based workflows.

   

Engagement Type

• B2B contract.

   

Location / Timezone

• Priority location is Krakow, Poland;
• On-site presence at the Akvelon office

About the Company:

🌎 Akvelon is a USA-based software engineering and consulting company with offices across the USA, Poland, Ukraine, Serbia, and Mexico. We are an official vendor of Google and Microsoft and partner with Fortune 500 clients and global technology leaders.

At Akvelon, engineers work on large-scale cloud, AI, distributed systems, and enterprise platform projects used by millions of users worldwide.

Project Description:

We are hiring Senior Engineers for a strategic enterprise cloud data infrastructure project focused on expanding and improving the Managed Kafka Connect ecosystem.

The team is responsible for accelerating onboarding and productionization of first-party Kafka connectors for a large-scale managed streaming platform. Engineers will work on high-scale distributed data infrastructure, connector reliability, cloud integrations, CDC systems, and operational readiness.

Planned connectors include:

• Apache Iceberg Sink
• Debezium MySQL Source
• Debezium MongoDB Source
• SQL Server CDC Source
• Spanner CDC Source
• BigTable Sink
• BigQuery Sink improvements

The project includes:

• OSS connector integration
• Performance optimization
• Cloud authentication integration
• Reliability engineering
• Load testing
• Production readiness
• Kafka Connect ecosystem improvements

This engagement offers the opportunity to work on enterprise-scale distributed systems and modern cloud data infrastructure used by global technology platforms.

Responsibilities:

• Integrate and productionize Kafka Connect connectors
• Improve performance, scalability, and reliability of distributed data systems
• Optimize JVM applications and troubleshoot bottlenecks/OOM issues
• Work with Kafka Connect internals and connector lifecycle
• Implement cloud authentication and networking integrations
• Participate in operational readiness activities:
  • Load testing
  • Probers
  • Playbooks
  • Launch reviews
• Collaborate with distributed engineering teams
• Contribute to backend services written in Java and partially Go

Requirements:

Must Have:

• 5+ years of backend engineering experience
• Strong Java / JVM expertise
• Experience with performance tuning and troubleshooting
• Strong understanding of distributed systems
• Hands-on experience with Apache Kafka and Kafka Connect
• Experience debugging production infrastructure issues
• Experience with build systems and dependency management
• Experience with cloud infrastructure (preferably GCP)
• Upper-Intermediate+ English

Nice to Have:

• Apache Iceberg experience
• Debezium experience
• CDC systems knowledge
• Go backend development experience
• Kubernetes knowledge
• SRE / operational readiness background
• OSS contribution experience
• Experience with large-scale platform engineering

Working Conditions and Benefits:

• Paid vacation and sick leave
• Official state holidays — 9-11 public holidays per year
• Professional growth through challenging projects and the opportunity to master new technologies
• Flexible working schedule: 8 hours per day, 40 hours per week
• Personal Career Development Plan (CDP)
• Employee support programs (discounts, healthcare, legal assistance)
• Paid external training, conferences, and professional certifications aligned with business goals
• Internal workshops, seminars, and English classes
• Corporate library with paper and e-books

This position is not open to U.S.-based applicants.

Ready to work on distributed systems? Apply now and join our team.

About the Company:

🌎 Akvelon is a USA-based software engineering and consulting company with offices across the USA, Poland, Ukraine, Serbia, and Mexico. We are an official vendor of Google and Microsoft and partner with Fortune 500 clients and global technology leaders.

At Akvelon, engineers work on large-scale cloud, AI, distributed systems, and enterprise platform projects used by millions of users worldwide.

Project Description:

We are hiring Senior Engineers for a strategic enterprise cloud data infrastructure project focused on expanding and improving the Managed Kafka Connect ecosystem.

The team is responsible for accelerating onboarding and productionization of first-party Kafka connectors for a large-scale managed streaming platform. Engineers will work on high-scale distributed data infrastructure, connector reliability, cloud integrations, CDC systems, and operational readiness.

Planned connectors include:

• Apache Iceberg Sink
• Debezium MySQL Source
• Debezium MongoDB Source
• SQL Server CDC Source
• Spanner CDC Source
• BigTable Sink
• BigQuery Sink improvements

The project includes:

• OSS connector integration
• Performance optimization
• Cloud authentication integration
• Reliability engineering
• Load testing
• Production readiness
• Kafka Connect ecosystem improvements

This engagement offers the opportunity to work on enterprise-scale distributed systems and modern cloud data infrastructure used by global technology platforms.

Work from the office Poland, Krakow

Responsibilities:

• Integrate and productionize Kafka Connect connectors
• Improve performance, scalability, and reliability of distributed data systems
• Optimize JVM applications and troubleshoot bottlenecks/OOM issues
• Work with Kafka Connect internals and connector lifecycle
• Implement cloud authentication and networking integrations
• Participate in operational readiness activities:
  • Load testing
  • Probers
  • Playbooks
  • Launch reviews
• Collaborate with distributed engineering teams
• Contribute to backend services written in Java and partially Go

Requirements:

Must Have:

• 5+ years of backend engineering experience
• Strong Java / JVM expertise
• Experience with performance tuning and troubleshooting
• Strong understanding of distributed systems
• Hands-on experience with Apache Kafka and Kafka Connect
• Experience debugging production infrastructure issues
• Experience with build systems and dependency management
• Experience with cloud infrastructure (preferably GCP)
• Upper-Intermediate+ English

Nice to Have:

• Apache Iceberg experience
• Debezium experience
• CDC systems knowledge
• Go backend development experience
• Kubernetes knowledge
• SRE / operational readiness background
• OSS contribution experience
• Experience with large-scale platform engineering

Working Conditions and Benefits:

• Paid vacation and sick leave
• Official state holidays — 9-11 public holidays per year
• Professional growth through challenging projects and the opportunity to master new technologies
• Flexible working schedule: 8 hours per day, 40 hours per week
• Personal Career Development Plan (CDP)
• Employee support programs (discounts, healthcare, legal assistance)
• Paid external training, conferences, and professional certifications aligned with business goals
• Internal workshops, seminars, and English classes
• Corporate library with paper and e-books

This position is not open to U.S.-based applicants.

Ready to work on distributed systems? Apply now and join our team.