Java Developer | Financial Services

🏢 Summary: Long-term Java Developer / Architect opportunity to modernize a large-scale financial platform through new backend features, microservices, integrations, and legacy refactoring. The role covers architecture, development, testing, production troubleshooting, releases, and code reviews in an international Scrum environment, with mentoring responsibilities for Expert-level candidates. 🗂️ Requirements: 5+ years of experience for Senior level or 10+ years for Expert level, Java, Spring Boot, Spring Integration, Oracle / SQL, Kafka / IBM MQ, REST API, Jenkins, Maven, Git, JUnit, Testcontainers, Microservices architecture, Enterprise-scale systems 📃 Skills: Java, Spring, Boot, Integration, Oracle, SQL, Kafka, IBM, MQ, REST, Jenkins, Maven, Git, JUnit, Testcontainers, Microservices, AWS, Docker, Kubernetes, Selenium, JIRA, Scrum 🏢 Description: We are looking for an experienced Java Developer / Architect to join a long-term project within the financial systems domain. The project focuses on a major platform modernization, including the development of new functionalities, architectural transformation, legacy code refactoring, and the development of modern integration microservices. Location & Work Model Warsaw or Gdańsk Hybrid work – 2 days per week from the office International working environment English as the working language We are looking for both Senior (5+ years of experience) and Expert (10+ years of experience) profiles MUST-HAVE Java Spring Boot Spring Integration Oracle / SQL Kafka / IBM MQ REST API Jenkins Maven Git JUnit Testcontainers Experience with microservices architecture and enterprise-scale systems NICE-TO-HAVE Experience in the banking or financial sector AWS Docker / Kubernetes Experience working with legacy code Selenium Responsibilities Designing and developing backend integration components in Java Developing microservices based on Spring Boot Integrating systems using REST API, Kafka, and IBM MQ Modernizing existing solutions and refactoring legacy code Analyzing business and technical requirements Analyzing logs and data flows and troubleshooting production environments Developing and maintaining automated tests using JUnit and Testcontainers Participating in deployments and supporting releases Performing code reviews and promoting software development best practices For Expert-level candidates: mentoring less experienced developers About the Project This is a long-term initiative focused on modernizing a large-scale financial platform. The upcoming years will involve the migration of business processes and volumes, combining the development of new solutions with significant architectural modernization and legacy code refactoring. The team is expanding significantly. The number of developers is expected to grow from approximately 8 to 15, while the broader area will include more than 35 specialists across Development, QA, Business Analysis, and Infrastructure Engineering. The team works in Scrum and uses JIRA. What Makes This Project Attractive? Long-term, strategic project Modern backend stack based on Java, Spring Boot, and Kafka Hands-on work with microservices architecture Real influence on the architecture of the system Strong focus on designing and building new solutions rather than maintenance only Opportunity to work at an expert level and mentor other developers Large-scale systems and a stable working environment International collaboration in English Opportunity to develop expertise in enterprise integrations and financial systems

🏢 Summary: Hybrid Java development role focused on building and maintaining systems that process high volumes of real-time data. The role includes delivering new functionality, database work, testing, performance validation, code reviews, and deployment preparation, with only 1–2 office days per month in Warsaw. 🗂️ Requirements: Commercial Java development experience, Experience with high-volume real-time data processing systems, Hands-on Apache Kafka experience, Unit and integration testing experience, Knowledge of relational databases, Understanding of software development best practices and quality standards 📃 Skills: Java, Kafka, Databases, Testing, Performance 🏢 Description: Java Developer (Kafka) 📍 Warsaw | Hybrid model (only 1-2 days per month in the office) We are looking for a Java Developer to join a project within the focused on the development and maintenance of systems that process large volumes of real-time data. Responsibilities Preparing and configuring development environments. Developing and implementing new functionalities. Creating and modifying database structures. Designing and executing unit and integration tests. Developing and performing performance tests. Ensuring that implemented changes comply with system architecture and quality standards. Participating in code reviews and quality assurance activities. Preparing solutions for deployment, including code repository management, configuration updates, and deployment documentation. Requirements Commercial experience in Java development. Experience working with systems that process large volumes of real-time data. Hands-on experience with Apache Kafka . Experience creating and executing unit and integration tests. Knowledge of relational databases. Understanding of software development best practices and quality standards. Nice to Have Knowledge of the Java Swing library. Experience developing and maintaining desktop applications based on Java Swing. What We Offer Hybrid work model with only 1-2 days per month in the Warsaw office . Opportunity to work on modern, real-time data processing systems. Long-term cooperation in a stable project environment. Collaboration with experienced professionals and opportunities for professional growth.

🏢 Summary: Hybrid Java Developer role on a long-term enterprise project involving development and maintenance of systems that process high volumes of real-time data. The work covers Java development, database components, testing, quality assurance, and deployment support, with only 1–2 office days per month in Warsaw. 🗂️ Requirements: Commercial Java development experience, Experience with high-volume real-time data systems, Hands-on Apache Kafka experience, Relational database and database development experience, Unit and integration testing experience, Understanding of development best practices, code reviews, and quality standards, Experience in enterprise-scale environments 📃 Skills: Java, Kafka, SQL 🏢 Description: 📍 Warsaw | Hybrid model (only 1-2 days per month in the office) We are looking for a Java Developer to join a project focused on the development and maintenance of systems processing large volumes of real-time data. This role combines software development, database-related activities, testing, and deployment support within a complex enterprise environment. Responsibilities Prepare and maintain development environments. Develop and implement new functionalities and enhancements. Create, modify, and maintain database components. Prepare and execute unit and integration tests. Design and perform performance testing activities. Verify compliance of delivered solutions with system architecture, coding standards, and quality requirements. Participate in code reviews and quality assurance processes. Prepare software changes for deployment, including code repository management, configuration updates, and deployment documentation. Requirements Commercial experience in Java development. Experience working with systems processing large volumes of real-time data. Hands-on experience with Apache Kafka . Experience with relational databases and database development. Experience creating and executing unit and integration tests. Understanding of software development best practices, code reviews, and quality standards. Experience working in enterprise-scale environments. Nice to Have Knowledge of the Java Swing library. Experience in developing and maintaining Java desktop applications. What We Offer Hybrid work model with only 1-2 days per month in the Warsaw office . Long-term cooperation on a stable and challenging project. Opportunity to work with modern technologies and real-time data processing solutions. Collaboration with experienced professionals in a dynamic environment. Professional growth and participation in business-critical initiatives.

🏢 Summary: Join a Data Transformation Technology team as a Java Developer building and enhancing distributed, business-critical process applications. The role combines backend development, architecture input, automation and CI/CD improvements, code reviews, and mentoring junior engineers in a hybrid Krakow-based setup. 🗂️ Requirements: 4+ years of backend or full-stack software engineering experience, Commercial experience with Java, Spring, SQL, Hibernate, and Kafka, System architecture and technical design experience, Relational database and web application framework knowledge, Enterprise integration experience: queues, publish-subscribe messaging, REST APIs, Microservices development or design experience, Automated testing, build automation, and CI/CD pipeline experience, Cloud-native technology experience with OpenShift, Docker, or Kubernetes, Agile software development experience, Ability to assess scalability, security, resilience, maintainability, and testability, Complex test and production issue troubleshooting, Professional working proficiency in English 📃 Skills: Java, Spring, SQL, Hibernate, Kafka, REST, OpenShift, Docker, Kubernetes, Angular, Microservices, CI/CD 🏢 Description: We are hiring on behalf of our client – a global financial services organization recognized for its premium service, deep domain expertise, and strong technology-driven approach. The company partners with clients, helping them solve complex challenges across investor services and capital markets. Their culture is built on collaboration, knowledge sharing, and empowering individuals to contribute beyond their immediate role. As a Java Developer , you will join the Data Transformation Technology team and help build a business process platform used by multiple teams across the organization. You will design, develop, and improve distributed applications that support business-critical workflows, combining hands-on backend engineering with contributions to system architecture, automation, and technical standards. You will also support junior engineers and help the team maintain a secure, resilient, and scalable technology environment. Key takeaways: Stack: Java, Spring, SQL, Hibernate, Kafka, REST APIs, OpenShift, Docker, Kubernetes, nice to have: Angular Salary: 20 000 - 24 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office (2 days per week for parents of children up to 4 years old) Location: ul. Klimeckiego, Krakow Recruitment process : A call with MOTIFE Recruiter (30 min) Technical interview with the Manager (1h) Technical interview with the Team (1h) Responsibilities: Software Development Develop and maintain application code for business-critical distributed systems. Build automated tests that improve software quality, stability, and maintainability. Analyse and resolve issues identified in testing and production environments. Conduct code reviews and provide actionable feedback to other engineers. Architecture and Technical Excellence Contribute to architecture, system design, and technology selection discussions. Evaluate function, scalability, testability, security, and resilience together with testers and business users. Research technologies and recommend improvements to the department’s technology stack. Define and improve engineering standards, development practices, and technical documentation. Automation and Delivery Drive greater automation across development, testing, and deployment processes. Support the design and implementation of CI/CD pipelines. Ensure applications and engineering practices remain aligned with current industry standards. Collaboration and Team Development Communicate effectively with engineers, testers, business users, and stakeholders outside the immediate team. Translate business and operational needs into practical technical solutions. Mentor and provide technical guidance to junior team members. Support the recruitment and assessment of new engineering talent. Requirements: Technical Expertise 4+ years of professional software engineering experience in a backend or full-stack role. Strong commercial experience with Java, Spring, SQL, Hibernate, and Kafka. Proven contributions to system architecture and technical design. Strong understanding of relational databases and popular web application frameworks. Practical knowledge of enterprise integration patterns, including queues, publish-subscribe messaging, and REST APIs. Experience designing or developing applications based on microservice architecture. Experience with automated testing, build automation, and CI/CD pipelines. Familiarity with cloud-native technologies and OpenShift, Docker, or Kubernetes. Exposure to Angular or another reactive frontend framework is an advantage. Engineering Practices Experience working within Agile software development environments. Ability to assess systems in terms of scalability, security, resilience, maintainability, and testability. Confidence troubleshooting complex issues across test and production environments. Ability to contribute constructively to code reviews, architecture discussions, and engineering standards. Collaboration and Mindset Strong critical-thinking and problem-solving skills. Clear and effective communication across technical and business teams. Professional working proficiency in English. What we offer: Private medical care Life insurance Professional training and certification support Social fund benefits platform Stable employment with a long-term contract Apply now Join a team building technology that supports critical business processes across a global organization. Please apply via our careers page and submit your CV in English.

🏢 Summary: Senior Java Developer role supporting secure, scalable banking and payments systems in Warsaw, with a hybrid schedule of one remote day per week. The position covers solution design, development, testing, and delivery of event-driven microservices within distributed systems. 🗂️ Requirements: 4+ years of Java development experience in financial or similarly complex domains, Java, Spring, Hibernate, DB2, Spring Boot, and RESTful API expertise, Apache Kafka experience, including producers, consumers, Kafka Streams, and Kafka Connect, MongoDB and Spring Data MongoDB knowledge, Docker, Maven, Git, and CI/CD pipeline familiarity, Understanding of event-driven microservices and distributed systems, Communicative English, Existing legal right to work in the European Union 📃 Skills: Java, Spring, Hibernate, DB2, Kafka, MongoDB, Docker, Maven, Git, GitLab, CI/CD, REST 🏢 Description: Unleash innovative financial solutions — shape the future of fintech with Java excellence! Warsaw-based opportunity with hybrid work model (1 remote day per week). As a Senior Java Developer , you will be working for our client, a leader in financial technology solutions. You will contribute to critical projects in the banking and payments industry, shaping the evolution of secure, scalable financial systems and ensuring seamless integration of cutting-edge technologies. This role offers an excellent platform for career growth amidst a dynamic, global team. Your main responsibilities: Participate in requirements gathering sessions with business users to understand project needs. Lead analysis, solution design, and planning activities within the engineering team. Implement and rigorously test software changes; participate in code reviews and assist in UAT and releases. Innovate by improving existing stacks and developing new functionalities in a fast-paced environment. Contribute to the development of event-driven and microservices architectures within distributed systems. Collaborate effectively with international teams and stakeholders. Maintain high-quality documentation and ensure adherence to best practices. Engage actively in continuous improvement initiatives and process optimizations. You're ideal for this role if you have: 4+ years of proven experience in Java development within financial or similarly complex domains. Proficiency in Java, Spring, Hibernate, DB2, Spring Boot, and RESTful API design. Experience with Apache Kafka, including producers, consumers, Kafka Streams, and Kafka Connect. Knowledge of MongoDB and Spring Data MongoDB. Familiarity with Docker, Maven, Git, and CI/CD pipelines (preferably GitLab CI). Solid understanding of event-driven/microservices architectures and distributed systems. Strong analytical, communication, and teamwork skills. Ability to work in a fast-paced, collaborative environment with a strong work ethic. It is a strong plus if you have: Experience with IBM MQ / JMS and infrastructure as code. Knowledge of financial messaging standards such as ISO 20022, SWIFT, CBPR+, FIN. Python scripting and experience in financial services, payments, or banking technology. Language Required for the role: Communicative English proficiency. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Experienced Java Developer role focused on building, testing, deploying, and maintaining scalable enterprise backend applications. The position involves Java, Spring Boot, microservices, REST APIs, databases, CI/CD, and collaboration with cross-functional teams in a hybrid Kraków setup. 🗂️ Requirements: 7+ years of Java application development experience, Core Java expertise (Java 8/11/17), Spring Boot and Spring MVC expertise, Microservices architecture and RESTful web services experience, Hibernate/JPA experience, Relational database experience, Git version control proficiency, Maven or Gradle knowledge, JUnit and Mockito testing experience, Understanding of design patterns and object-oriented programming principles 📃 Skills: Java, SpringBoot, SpringMVC, Microservices, REST, Hibernate, JPA, SQL, Git, Maven, Gradle, JUnit, Mockito, CI/CD, DevOps 🏢 Description: 📌 We are seeking an experienced Java Developer with strong expertise in designing, developing, and maintaining enterprise-grade applications. The ideal candidate should have hands-on experience in Core Java, Spring Boot, Microservices, REST APIs, and database technologies , along with a solid understanding of software development best practices. Type of contract: B2B 📍 Location: Kraków (3 days per week from the client’s office) 💡 Key Responsibilities Design, develop, test, and deploy scalable Java-based applications. Build and maintain RESTful APIs and Microservices. Develop backend services using Java, Spring Boot , and related frameworks. Collaborate with business analysts, architects, and development teams to understand requirements. Write clean, maintainable, and efficient code following coding standards. Troubleshoot, debug, and optimize application performance. Participate in code reviews and ensure high-quality deliverables. Work with CI/CD pipelines and DevOps practices for application deployment. Ensure application security, reliability, and scalability. Required Skills 7+ years of experience in Java application development. Strong expertise in: Core Java (Java 8/11/17) Spring Boot Spring MVC Microservices Architecture RESTful Web Services Hibernate/JPA Experience with relational databases such as SQL Server, Oracle, MySQL, or PostgreSQL. Proficiency in Git and version control systems. Knowledge of Maven/Gradle build tools. Experience with unit testing frameworks like JUnit and Mockito. Understanding of design patterns and object-oriented programming principles Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Hybrid Java development role in Warsaw's banking environment, focused on transaction-processing integrations, database solutions, testing, code reviews, and deployments. The offer supports candidates available to start ASAP or within a 30-day notice period. 🗂️ Requirements: 2–3 years of Java development experience, Banking systems development experience, Apache Kafka experience, High-volume real-time systems experience, SQL knowledge, REST API knowledge, Software testing knowledge, Understanding of system integrations, Understanding of distributed architectures 📃 Skills: Java, Kafka, SQL, REST, Testing, Integrations, Architectures 🏢 Description: Location: Warsaw (hybrid, 1-5 days/month from the office) Start Date: ASAP / up to 30 days notice period Responsibilities Develop and maintain Java applications in the banking environment. Build integrations and support transaction processing systems. Create and modify database solutions. Develop and execute unit and integration tests. Participate in code reviews and deployment activities. Requirements Min. 2-3 years of experience in Java development. Experience in banking systems development. Experience with Apache Kafka. Experience working with high-volume, real-time systems. Good knowledge of SQL, REST APIs, and software testing. Understanding of system integrations and distributed architectures. Nice to have Knowledge of Java Swing. Experience with ATM, POS, payment, or card processing systems. What We Offer Hybrid work model. Medicover healthcare. Multisport card. Access to an e-learning platform. Group life insurance.

🏢 Summary: Senior Java Developer contract for a logistics project, focused on building secure, high-performance backend data-processing services in a microservices architecture. The role uses Java, Confluent Kafka/KStreams, MongoDB Atlas and PostgreSQL, with hybrid work from the Warsaw office 2–3 days per week. 🗂️ Requirements: 10+ years of Java development experience, Strong Confluent Kafka expertise, Strong KStreams expertise, MongoDB Atlas experience, PostgreSQL experience, English proficiency, Polish proficiency 📃 Skills: Java, Kafka, Confluent, KStreams, MongoDB, PostgreSQL, CI/CD, Microservices 🏢 Description: 🌍Work model: 2-3 days a week from the Warsaw office. 💰Rate: B2B - up to 190 zl/h. ⏰Start: ASAP/ 1 month. ⏳Project length: > 12 months + extensions. 📕Project language: English + Polish. 💼 Industry: Logistics. ⚙️Recruitment process: 2 interviews with the client. 🔍Workload: fulltime. Summary: The Senior Java Developer is primarily responsible for designing and developing backend applications while ensuring adherence to high standards of security, performance, and quality. This role focuses on leveraging extensive experience in Java and Kafka to build robust data processing solutions within a microservices architecture. Main Responsibilities: Building, testing, and deploying software using CI/CD pipelines. Creating microservices for data processing, database interactions, and data exposure. Implementing relevant architectural patterns for data handling and web services. Ensuring accurate logging and alert configurations for operational efficiency. Conducting comprehensive testing of software for various performance criteria. Integrating security features, including authentication and authorization controls. Participating in a developer guild to share best practices and technical knowledge. Key Requirements: 10+ years of relevant experience in Java development. Strong expertise in Kafka, particularly with Confluent Kafka and KStreams. Experience with MongoDB Atlas and PostgreSQL as database technologies. Nice to Have: Familiarity with authentication protocols such as OIDC, OAuth2, and SAML. Experience with containerization technologies like Docker. Knowledge of Kubernetes for container orchestration. Experience with the ELK stack for logging, monitoring, and alerting.

🏢 Summary: Senior Java Developer role focused on building and modernizing secure, scalable backend platforms and microservices for investment management products. The position offers hands-on architectural ownership, production support responsibilities, and collaboration across Agile engineering and business teams in a hybrid Krakow model. 🗂️ Requirements: 6+ years of commercial Java enterprise application development, Java 17+ proficiency, Advanced Spring and Spring Boot experience, REST API and backend service development experience, Microservices architecture knowledge, Object-oriented design, clean code, and design patterns, SQL query analysis and optimization, Docker and Kubernetes production experience, Kafka or event-streaming platform familiarity, CI/CD and DevOps practices experience, Secure coding and application security knowledge, Security scanning or vulnerability detection tools experience, Logging, monitoring, metrics, and distributed tracing familiarity, Business-critical production support and troubleshooting experience, Cross-functional collaboration with architects, QA, DevOps, and business teams, Very good English communication skills 📃 Skills: Java, Spring, SpringBoot, REST, SQL, Docker, Kubernetes, Kafka, CI/CD, DevOps, Microservices, Agile 🏢 Description: We are hiring on behalf of our client – a global financial services organization recognized for its premium service, deep domain expertise, and strong technology-driven approach. The company partners with clients, helping them solve complex challenges across investor services and capital markets. Their culture is built on collaboration, knowledge sharing, and empowering individuals to contribute beyond their immediate role. As a Senior Java Developer , you will design and develop core backend platforms and scalable microservices. You will contribute to new product development and modernization initiatives, influence architectural decisions, and work closely with engineering and business stakeholders throughout the software development lifecycle. This is a senior, hands-on engineering role with strong ownership expectations. You will help shape technical solutions, improve engineering practices, and ensure that business-critical systems remain secure, reliable, maintainable, and ready to scale. Key takeaways: Stack: Java 17+, Spring, Spring Boot, REST APIs, SQL, Docker, Kubernetes, Kafka, CI/CD Salary: 27 000 - 30 000 PLN gross on the Contract of Employment Working model : Hybrid - 3 days/week from the office (2 days per week for parents of children up to 4 years old) Location: ul. Klimeckiego, Krakow Recruitment process : A call with MOTIFE Recruiter (30 min) Technical interview with the Manager (1h) Technical interview with the Team (1h) Responsibilities: Backend Development Design, develop, and maintain enterprise-grade applications using Java 17+, Spring, and Spring Boot. Build scalable microservices and REST APIs supporting investment management products. Apply object-oriented design, clean code principles, and established software design patterns. Develop solutions that meet demanding performance, reliability, security, and maintainability standards. Architecture and Technical Excellence Contribute to architectural decisions and translate business requirements into effective technical solutions. Drive technical improvements across existing platforms and modernization initiatives. Participate in code reviews and promote consistent engineering standards across the team. Ensure solutions follow secure coding principles and software development lifecycle best practices. Cross-Functional Collaboration Partner with architects, QA engineers, DevOps specialists, and business stakeholders throughout the development lifecycle. Work within a cross-functional Agile team delivering web, backend, and mobile platform capabilities. Communicate technical decisions, risks, and dependencies clearly to technical and non-technical stakeholders. Support knowledge sharing and mentor other engineers where required. Delivery and Production Ownership Troubleshoot and resolve complex technical and production issues. Improve logging, monitoring, metrics, and distributed tracing across services. Enhance CI/CD pipelines to streamline software delivery and deployment. Drive continuous improvements in development processes, engineering tooling, and operational reliability. Requirements: Technical Expertise At least 6 years of hands-on commercial experience developing enterprise applications in Java. Strong practical knowledge of Java 17 or newer. Advanced experience with Spring, Spring Boot, REST APIs, and backend service development. Strong understanding of microservices architecture, object-oriented design, clean code, and software design patterns. Solid SQL skills, including practical experience with query analysis and optimization. Production experience with Docker and Kubernetes. Familiarity with messaging or event-streaming platforms such as Kafka. Experience working with CI/CD pipelines and modern DevOps practices. Security and Production Engineering Understanding of secure coding principles and common application security risks. Experience using security scanning or vulnerability detection tools. Familiarity with application logging, metrics, monitoring, and distributed tracing. Experience troubleshooting and supporting business-critical production systems. Collaboration and Mindset Proven ability to take ownership of technical solutions from design through production support. Strong problem-solving skills and the ability to resolve complex engineering challenges. Ability to collaborate effectively with architects, QA, DevOps, and business teams. Very good English communication skills. What we offer: Private medical care Life insurance Professional training and certification support Social fund benefits platform Stable employment with a long-term contract Apply now Join a senior engineering team building secure and scalable platforms for the investment management industry. Please apply via our careers page and submit your CV in English.

🏢 Summary: Senior Java Developer role focused on building and modernizing a global enterprise data integration platform. The position delivers scalable microservices, event-driven data processing, and system integrations, with Apache Kafka production expertise as a core requirement. 🗂️ Requirements: 10+ years of commercial software development experience, Senior-level Java backend expertise, Production experience with Apache Kafka, Experience designing microservices and scalable backend services, Experience with event-driven architectures, Experience with distributed systems and enterprise integrations, Experience with data-processing solutions, Ability to contribute independently to technical design and architecture discussions, Very good English communication skills, Residence in Poland, Valid Confluent Certified Developer for Apache Kafka (CCDAK) certification 📃 Skills: Java, SpringBoot, ApacheKafka, Microservices, EventDriven, DistributedSystems, APIs, Messaging, DDD, CCDAK 🏢 Description: We are looking for an experienced Senior Java Developer to join a team building a modern enterprise data integration and processing platform that supports key logistics and transportation processes on a global scale. This role focuses on developing scalable backend services, microservices, and event-driven integrations within a complex enterprise environment. You will contribute to the design and implementation of solutions that enable efficient data processing and communication across business systems. An important part of the role involves modernizing legacy applications and delivering solutions aligned with Domain-Driven Design principles. We are looking for a self-driven professional who can actively participate in architecture discussions and make sound technical decisions. Strong hands-on production experience with Apache Kafka is essential for success in this role. Your tasks Designing, developing, and maintaining scalable backend services and microservices using Java and Spring Boot Implementing event-driven architectures and data-processing solutions based on Apache Kafka Building enterprise integrations between internal and external systems using APIs, messaging platforms, and asynchronous communication mechanisms Participating in technical design and solution architecture discussions, providing expertise in distributed systems and integration patterns Supporting the modernization and transformation of legacy applications into scalable, maintainable, and cloud-ready solutions Monitoring, troubleshooting, and optimizing application performance, reliability, and scalability across distributed environments Collaborating closely with developers, architects, and business stakeholders to deliver strategic data integration and digital transformation initiatives Requirements Minimum 10 years of commercial software development experience, including strong senior-level expertise in Java backend development Strong hands-on production experience with Apache Kafka Proven experience designing and building microservices, scalable backend services, and event-driven architectures Practical experience working with distributed systems, enterprise integrations, and data processing solutions Ability to contribute independently to technical design and solution architecture discussions Very good English communication skills, enabling effective collaboration in an international environment Residence in Poland Valid Confluent Certified Developer for Apache Kafka (CCDAK) certification Nice-to-have requirements Production experience with Kafka Streams and Kafka Connect Experience with cloud-native and containerized environments, including Azure, Kubernetes, OpenShift, Docker, or Podman