Backend Engineer - Java and Test Automation

🏢 Summary: Mid-level engineering role focused on developing and supporting Java and React-based microservices for a global payments platform, enabling secure and high-volume fund transfers. The position involves modernizing legacy systems into API-driven architectures and enhancing automation and transaction processing. Hybrid work model with strong emphasis on scalable, reliable financial systems. 🗂️ Requirements: Minimum 4 years of software development experience, Strong experience with Java 11+, Commercial experience with ReactJS, Experience building RESTful microservices and APIs, Hands-on experience with Kubernetes, Experience with Git, Experience with Unix-based systems, Strong knowledge of SQL and Oracle databases, Fluent English, Legal right to work in the European Union 📃 Skills: Java, ReactJS, Microservices, REST, API, Kubernetes, Git, Unix, SQL, Oracle, Spring, SpringBoot, JavaScript, WebSphere, Automation, DevOps 🏢 Description: Unleash innovation — shape the future of digital payments Krakow-based opportunity with hybrid work model (up to 3 remote days per week) As a Mid-Level Java & React Microservices Engineer – Payments Platform , you will be working for our client, a leading provider in the financial technology industry. You will contribute to the development and support of the Global Disbursements platform, enabling customers worldwide to move funds rapidly and securely—fueling seamless global transactions, paying suppliers, allocating salaries, settling taxes, and transferring money across multiple channels. Join us and be part of a transformative journey in modern payments technology, fostering innovation and growth in your career. Your main responsibilities: Building and supporting microservices and applications (both front-end and back-end) using Java 11/17/21 and ReactJS, ensuring high-quality standards and reliability. Migrating from mainframe systems and IBM WebSphere to modern API and microservices architectures to reduce costs and complexity. Implementing automation testing frameworks to decrease testing costs and increase efficiency. Enhancing Straight-Through Processing (STP) capabilities of services to streamline transaction flows. You're ideal for this role if you have: Minimum of 4 years of experience in software development, particularly in Java and React environments. Proficiency with Java 11+, preferably Java 17+. Hands-on experience with Kubernetes, Git, and Unix-based systems. Strong knowledge of database technologies and SQL, especially Oracle. Solid understanding of RESTful microservices and APIs. Experience working within a DevOps delivery team is a plus. Familiarity with application monitoring and Spring/Spring Boot is desirable. It is a strong plus if you have: Certifications or experience in automation testing frameworks. Knowledge of Web technologies and JavaScript. Language Required for the role: Fluent English Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. We offer you: ITDS Business Consultants is involved in various, innovative, and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people. The offer includes: Stable and long-term cooperation with very good conditions Enhance your skills and develop your expertise in the financial industry Work on the most strategic projects available in the market Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years Participation in Social Events, training, and work in an international environment Access to an attractive Medical Package Access to Multisport Program #GETREADY Internal job ID #8860 You can report violations in accordance with ITDS’s Whistleblower Procedure available here .

🏢 Summary: Senior Automation Tester role focused on designing and maintaining automated testing solutions for a payments platform, ensuring high quality, security, and compliance of payment systems. The position involves end-to-end automation across UI, API, and integration layers, with strong emphasis on payment processing standards and CI/CD integration. Hybrid work model based in Krakow with up to three remote days per week. 🗂️ Requirements: 5+ years of automation engineering experience, Strong Java proficiency (OOP, design patterns, clean code), Experience with JUnit or TestNG, Experience with Selenium or Playwright, Experience with REST Assured, Experience with Postman or Newman, Experience with SoapUI, Experience with CI/CD tools (Jenkins, GitLab CI, or Azure DevOps), Knowledge of ISO20022 and SWIFT standards, Understanding of payment processing concepts, Knowledge of test automation best practices, Fluent English, Legal right to work in the EU 📃 Skills: Java, JUnit, TestNG, Selenium, Playwright, REST, SOAP, RESTAssured, Postman, Newman, SoapUI, Jenkins, GitLabCI, AzureDevOps, ISO20022, SWIFT, CI/CD, OOP, Docker, Kubernetes, Kafka, JMeter, Gatling 🏢 Description: Unleash transformative automation — redefine payment excellence through innovative testing! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Automation Tester – Payments Platform , you will be working for our client, a leader in the payment processing industry. You will play a pivotal role in designing, building, and maintaining automated test solutions that elevate the quality and reliability of payment systems. Your expertise will help deliver seamless, secure, and compliant payment journeys, supporting the evolution of global financial services. Your main responsibilities: Build and maintain robust automated test frameworks using Java and industry-standard tools (UI, API, integration layers). Convert functional payment requirements into comprehensive automated test cases, covering end-to-end scenarios and edge cases. Automate testing for payment components such as credit transfers, direct debits, SWIFT/ISO 20022 messages, and payment gateways. Develop API and service-level automation leveraging REST/SOAP, including contract/schema validation. Validate payment processing rules, including cut-off times, value dates, charges, FX, sanctions screening, reversals, and exceptions. Implement test data strategies with synthetic data, masking, and data seeding; ensure transaction correlation across systems. Integrate automated tests into CI/CD pipelines to enable continuous testing, reporting, and quality control. Analyze failures efficiently and report defects with precise evidence for rapid resolution. Collaborate with cross-functional teams to define acceptance criteria and release readiness. Maintain comprehensive test documentation, dashboards, and metrics for automation coverage and execution. You're ideal for this role if you have: 5+ years of experience in automation engineering, with strong Java proficiency, including OOP, design patterns, and clean code. Hands-on experience with automation frameworks such as JUnit/TestNG, Selenium/Playwright, REST Assured, Postman/Newman, and SoapUI. Familiarity with CI/CD tools like Jenkins, GitLab CI, or Azure DevOps. Deep understanding of test automation best practices: maintainability, parallel execution, environment resilience. Knowledge of payment processing concepts, including ISO20022, SWIFT, and local formats. Understanding of operational risk considerations, sanctions screening, auditability, and high availability requirements. It is a strong plus if you have: Exposure to performance testing tools like JMeter or Gatling. Experience with containerization (Docker/Kubernetes). Knowledge of event-driven architectures (Kafka) and asynchronous processing. Test data management expertise. Language required for the role: Fluent in English. Eligibility to work on this 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: Backend Engineer role focused on developing and maintaining Java-based microservices and automated testing frameworks for a global payments platform. The position involves modernizing legacy systems, improving transaction automation, and ensuring high-quality, high-performance backend services within a DevOps environment. Hybrid work model based in Kraków. 🗂️ Requirements: Strong experience with Java 11+, Advanced experience in test automation and automated test framework design, Solid understanding of RESTful microservices and APIs, Proficiency with Git, Experience with Unix-based systems and command-line, Experience with SQL and databases, Strong knowledge of Spring, Strong knowledge of Spring Boot 📃 Skills: Java, REST, Microservices, API, Git, Unix, SQL, Oracle, Spring, SpringBoot, TDD, Python, Bash 🏢 Description: Backend Engineer (Java & Test Automation) B2B | hybrid work from Kraków Your Career Opportunity: Global Disbursements Platform Join the team behind Global Disbursements , a high-impact payments platform that empowers clients to move funds freely and fast across the globe. From paying suppliers and crediting salaries to direct tax settlements, our platform handles complex financial transfers via multiple global channels. As a Backend Engineer , you will support the delivery of key projects through high-quality analysis, Agile design, and deep technical insight. You will work within a DevOps-aligned environment, using modern tools to ensure our global payment solutions are robust and efficient. What You’ll Do: Develop & Support: Build and maintain high-performance backend services and microservices using Java 11, 17, and 21. Drive Quality: Design, implement, and maintain robust automation testing frameworks to ensure software excellence and reduce testing overhead. Modernize Infrastructure: Help reduce costs and complexity by migrating legacy systems to modern integration layers using APIs and microservice patterns. Optimize Performance: Work on increasing Straight-Through-Processing (STP) capabilities to ensure seamless, automated financial transactions. What You Need to Succeed (Must-have): Java Proficiency: Strong experience with Java 11+ (Java 17+ is highly preferred). Test Automation: Advanced, hands-on experience in software testing, including the design and implementation of automated test frameworks. Microservices: A solid working understanding of RESTful microservices and APIs. Core Tools: Proficiency with Git for version control. Systems & Data: Comfort navigating Unix-based systems and command-line interfaces, plus experience with SQL and database technologies (Oracle preferred). Frameworks: Strong knowledge of Spring and Spring Boot. Nice-to-have: Experience with Test-Driven Development (TDD) methodologies. Knowledge of scripting languages (e.g., Python, Bash ). Prior experience working within a QA team . Understanding of application monitoring tools and practices. Why apply for an Antal job offer? When your application is successful, you will be supported by a dedicated Consultant who will stay in regular contact with you (via email or phone), help you prepare for interviews with your future employer, and ensure a smooth and professional recruitment process. About Antal Antal is a leading recruitment and HR advisory company, present in Poland since 1996 and later expanded to the Czech Republic and Hungary. Across the CEE region, we employ around 150 professionals who deliver a full range of services – from specialist and executive recruitment, employee outsourcing and HR consulting, to employer branding and market research. Our division-based structure combines deep industry expertise with functional specialisation, enabling us to provide tailored solutions for companies in every sector. We act as a trusted partner for both employers and candidates, sharing our knowledge and guiding them through every stage of the talent journey. We connect exceptional people with the right opportunities and help organisations build successful teams.

🏢 Summary: Senior Java Developer role focused on designing, building, and operating highly scalable fintech backend systems supporting high-volume payment, trading, and settlement platforms. The position involves developing production-grade Java/Spring Boot microservices, scalable APIs, and distributed systems in cloud environments. The engineer owns features end-to-end, ensuring reliability, fault tolerance, and performance in high-traffic financial systems. 🗂️ Requirements: 5–15 years backend development experience, Strong Java experience in production, Hands-on Spring Boot experience, Experience in fintech, banking, payments, or trading systems, Experience building scalable backend services and APIs, Strong SQL knowledge, Experience with NoSQL databases, Knowledge of microservices architecture, Understanding of distributed systems, Experience with asynchronous processing, Experience across full SDLC, Cloud experience with AWS or Azure, Experience debugging distributed systems, English communication skills 📃 Skills: Java, Spring, SpringBoot, SQL, PostgreSQL, MySQL, MongoDB, NoSQL, Microservices, DistributedSystems, AWS, Azure, REST, APIs, SDLC, AsynchronousProcessing 🏢 Description: We are looking for a Senior Java Developer to join our team in Poland and contribute to the development of highly scalable fintech systems supporting trillions of dollars in transactions annually . In this role, you will work closely with the US-based product and engineering teams , helping to design, build, and operate backend services for programmable payment, trading, and settlement platforms. You will report directly to the Software Manager in Poland. A key requirement is excellent English communication skills and strong soft skills — we are looking for someone eloquent, outgoing, friendly, and confident in collaboration . Requirements 5 -15 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production systems. Previous exposure to banking, payments, trading, or financial transaction systems. Proven experience building and maintaining backend services and APIs at scale. Solid understanding of SQL and NoSQL databases (e.g., PostgreSQL/MySQL, MongoDB). Knowledge of microservices architecture, distributed systems, and asynchronous processing. Experience across full SDLC: architecture, development, testing, deployment, and maintenance. Experience operating systems in cloud environments such as AWS or Azure . Excellent communication skills in English . Nice to Have Experience with Spring AI . Degree in Computer Science or equivalent practical experience. Personal Attributes Highly hands-on engineer who enjoys owning production-grade code. Comfortable working in a fast-paced, startup or high-growth environment. Strong analytical thinking, problem-solving ability, and attention to detail. Clear communicator, confident in collaborating with international teams. Friendly, proactive, and motivated to grow with the company and product. Design and develop backend architecture for fintech products and platforms. Build, maintain, and operate high-performance Java / Spring Boot microservices running in production environments. Develop scalable APIs and backend workflows with strong emphasis on data consistency, fault tolerance, and reliability. Own features end-to-end: from implementation through deployment and production support. Debug and resolve complex issues in distributed systems and high-volume production environments. Work closely with US-based teams to translate product requirements into robust backend solutions. Write clean, maintainable code and contribute to technical documentation, diagrams, and system workflows. Participate in code reviews and continuously improve backend quality and engineering standards.

🏢 Summary: Frontend Engineer role focused on developing and supporting a global payments disbursements platform using modern front-end technologies within a microservices architecture. The position involves building scalable applications, enhancing payment processing capabilities, and automating testing in an Agile environment. Hybrid work model based in Krakow. 🗂️ Requirements: Minimum 4 years experience in payments or disbursements domain, Strong knowledge of React 18, Strong knowledge of Typescript 5, Strong knowledge of Bootstrap 5, Experience with JSP or other legacy UX technologies, Proficiency in Java 8 or higher, Understanding of RESTful microservices and APIs, Experience with databases and SQL, Fluent English, Legal right to work in the European Union 📃 Skills: React, TypeScript, Bootstrap, Java, JSP, REST, Microservices, Spring, SpringBoot, SQL, Databases, Agile 🏢 Description: Unleash the future of digital payments — craft seamless experiences with cutting-edge front-end technology! Krakow-based opportunity with hybrid work model (up to 3 days remote per week). As a Frontend Engineer , you will be working for our client, a leader in the global payments industry. You will contribute to the development and support of the Global Disbursements platform, enabling customers to move funds quickly and securely across borders. Join a team focused on innovation, efficiency, and impactful financial solutions. Your main responsibilities: Build and support microservices and applications (front-end) using ReactJS, Typescript, Bootstrap, and Java 8/11/17 within a microservices architecture. Enhance the Straight-Through-Processing (STP) capabilities, streamlining payment flows and reducing operational costs through interactive tools and observability patterns. Automate testing processes to improve efficiency and reliability of payment services. Maintain legacy UX technologies and develop new interfaces in a fast-paced, Agile environment. Collaborate with stakeholders and solution teams to deliver high-quality payment solutions aligned with business needs. You're ideal for this role if you have: At least 4 years of experience in payments disbursements or related fields. Strong knowledge of React 18, Typescript 5, Bootstrap 5. Experience with legacy UX technologies such as JSP. Proficiency in Java 8+ (Java 17+ is a plus). Working understanding of ReSTful microservices and APIs. Knowledge of Spring/Spring Boot frameworks is desirable. Experience with databases and SQL. It is a strong plus if you have: Certifications or experience in automation testing frameworks. Language Required for the role: Fluent English communication skills. 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: Long-term B2B role in the banking sector focused on developing and modernizing a global payment platform using Java and React. The position involves building and migrating services to microservices architecture, supporting DevOps practices, and improving automation and processing efficiency in a hybrid work model. 🗂️ Requirements: Strong expertise in Java 17+, Experience with Kubernetes, Knowledge of Git, Proficiency in Unix-based systems and CLI, Experience with SQL and databases, Understanding of RESTful microservices and APIs, Knowledge of HTTP, Experience with JavaScript and React, Experience in DevOps delivery team, Knowledge of Spring or Spring Boot 📃 Skills: Java, React, Kubernetes, Git, Unix, SQL, Oracle, REST, HTTP, JavaScript, Spring, SpringBoot, Microservices, APIs, DevOps 🏢 Description: Project information: Industry: banking Location & Hybrid Model Kraków – 5-6 days per month onsite (Kraków office) Warsaw – 5-6 days per month onsite (Warsaw office) Outside Kraków/Warsaw – 3 days per month from the Warsaw or Kraków office Rate: We’re open to your suggestions Contract : B2B, no end date, long-term cooperation Summary: We are looking for skilled individuals for the payment platform, which allows our customers and clients to move funds across the globe, pay their suppliers, credit salaries, pay taxes directly to authorities and transfer money via multiple channels. The purpose of the role is to support project delivery through high-quality analysis and Agile design artefacts, effective stakeholder management, and deep business insight for the solution delivery team, all enabled by appropriate tools and aligned with DevOps working practices. Responsibilities: Building and supporting services, microservices, and applications (back-end and front-end) in Java 11/17/21, ReactJS, while maintaining and preserving standard products. Reduce costs and complexity by migrating from mainframe and IBM WebSphere to a modern approach with an integration layer such as APIs or microservices patterns. Reduce testing costs by adopting automated testing frameworks. Increasing Straight-Trough-Processing (STP) capabilities of services. Requirements: Strong expertise in Java 17+ is a must Kubernetes & Git knowledge Fluency in navigating Unix-based systems and command-line interfaces is essential. Database technologies and SQL - Oracle preferred (nice-to-have) A working understanding of RESTful microservices and APIs HTTP Web technologies and JavaScript - React Having worked in a DevOps delivery team A desirable understanding of application monitoring. Knowledge of Spring/Spring Boot

🏢 Summary: Senior Java Developer role focused on designing, building, and operating scalable fintech backend systems using Java and Spring Boot in cloud environments. The position involves developing high-performance microservices and APIs for payment, trading, and settlement platforms, with end-to-end ownership from architecture to production support. The role requires close collaboration with international teams and ensuring reliability, consistency, and fault tolerance in distributed systems. 🗂️ Requirements: 3–5 years backend development experience, Strong experience with Java, Strong experience with Spring Boot, Experience building scalable backend services and APIs, Knowledge of SQL and NoSQL databases, Understanding of microservices architecture, Understanding of distributed systems, Experience with asynchronous processing, Experience across full SDLC, Experience with AWS or Azure, Professional English proficiency 📃 Skills: Java, SpringBoot, Microservices, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, REST, APIs, SDLC, DistributedSystems, AsynchronousProcessing 🏢 Description: Senior Java Developer (Java, Spring Boot, Microservices) Position Overview We are looking for a Senior Java Developer to join our team in Poland and contribute to the development of highly scalable fintech systems supporting trillions of dollars in transactions annually . In this role, you will work closely with the US-based product and engineering teams , helping to design, build, and operate backend services for programmable payment, trading, and settlement platforms. You will report directly to the Software Manager in Poland. A key requirement is excellent English communication skills and strong soft skills — we are looking for someone eloquent, outgoing, friendly, and confident in collaboration . Responsibilities Design and develop backend architecture for fintech products and platforms. Build, maintain, and operate high-performance Java / Spring Boot microservices running in production environments. Develop scalable APIs and backend workflows with strong emphasis on data consistency, fault tolerance, and reliability . Own features end-to-end: from implementation through deployment and production support. Debug and resolve complex issues in distributed systems and high-volume production environments. Work closely with US-based teams to translate product requirements into robust backend solutions. Write clean, maintainable code and contribute to technical documentation, diagrams, and system workflows. Participate in code reviews and continuously improve backend quality and engineering standards. Requirements 3–5 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production systems. Proven experience building and maintaining backend services and APIs at scale. Solid understanding of SQL and NoSQL databases (e.g., PostgreSQL/MySQL, MongoDB). Knowledge of microservices architecture, distributed systems, and asynchronous processing. Experience across full SDLC: architecture, development, testing, deployment, and maintenance. Experience operating systems in cloud environments such as AWS or Azure . Excellent communication skills in English . Nice to Have Experience with Spring AI . Previous exposure to banking, payments, trading, or financial transaction systems. Degree in Computer Science or equivalent practical experience. Personal Attributes Highly hands-on engineer who enjoys owning production-grade code. Comfortable working in a fast-paced, startup or high-growth environment. Strong analytical thinking, problem-solving ability, and attention to detail. Clear communicator, confident in collaborating with international teams. Friendly, proactive, and motivated to grow with the company and product.

🏢 Summary: Senior Java Developer role focused on designing, building, and operating scalable fintech backend systems handling high-volume transactions. The position involves developing Java/Spring Boot microservices, scalable APIs, and distributed architectures in cloud environments. You will collaborate with international teams to deliver reliable, production-grade financial platforms. 🗂️ Requirements: 3–5 years of backend development experience, Strong experience with Java and Spring Boot in production, Experience building scalable backend services and APIs, Strong knowledge of SQL and NoSQL databases, Understanding of microservices architecture and distributed systems, Experience with asynchronous processing, Experience across full SDLC, Experience with AWS or Azure cloud environments, Professional English communication skills 📃 Skills: Java, Spring, SpringBoot, Microservices, SQL, NoSQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, REST, APIs 🏢 Description: Senior Java Developer (Java, Spring Boot, Microservices) Position Overview We are looking for a Senior Java Developer to join our team in Poland and contribute to the development of highly scalable fintech systems supporting trillions of dollars in transactions annually . In this role, you will work closely with the US-based product and engineering teams , helping to design, build, and operate backend services for programmable payment, trading, and settlement platforms. You will report directly to the Software Manager in Poland. A key requirement is excellent English communication skills and strong soft skills — we are looking for someone eloquent, outgoing, friendly, and confident in collaboration . Responsibilities Design and develop backend architecture for fintech products and platforms. Build, maintain, and operate high-performance Java / Spring Boot microservices running in production environments. Develop scalable APIs and backend workflows with strong emphasis on data consistency, fault tolerance, and reliability . Own features end-to-end: from implementation through deployment and production support. Debug and resolve complex issues in distributed systems and high-volume production environments. Work closely with US-based teams to translate product requirements into robust backend solutions. Write clean, maintainable code and contribute to technical documentation, diagrams, and system workflows. Participate in code reviews and continuously improve backend quality and engineering standards. Requirements 3–5 years of professional backend development experience. Strong hands-on experience with Java and Spring Boot in production systems. Proven experience building and maintaining backend services and APIs at scale. Solid understanding of SQL and NoSQL databases (e.g., PostgreSQL/MySQL, MongoDB). Knowledge of microservices architecture, distributed systems, and asynchronous processing. Experience across full SDLC: architecture, development, testing, deployment, and maintenance. Experience operating systems in cloud environments such as AWS or Azure . Excellent communication skills in English . Nice to Have Experience with Spring AI . Previous exposure to banking, payments, trading, or financial transaction systems. Degree in Computer Science or equivalent practical experience. Personal Attributes Highly hands-on engineer who enjoys owning production-grade code. Comfortable working in a fast-paced, startup or high-growth environment. Strong analytical thinking, problem-solving ability, and attention to detail. Clear communicator, confident in collaborating with international teams. Friendly, proactive, and motivated to grow with the company and product.

🏢 Summary: Opportunity for an Expert Java Engineer to design and build scalable, high-performance financial systems within a global team. The role focuses on developing microservices, cloud-native solutions on Kubernetes and GCP, and influencing architectural decisions in mission-critical environments. Ideal for a senior back-end engineer experienced in distributed systems and banking or capital markets domains. 🗂️ Requirements: 5+ years of professional software engineering experience, Strong hands-on experience with Java, Experience with REST APIs and microservices architecture, Experience with messaging systems (RabbitMQ or similar), Strong SQL database knowledge, Hands-on experience with Kubernetes, Experience with cloud platforms (preferably GCP), Knowledge of NoSQL databases and distributed systems, Experience with CI/CD pipelines, Understanding of scalability, performance, and high-availability architectures, Experience in banking or capital markets domain 📃 Skills: Java, REST, Microservices, RabbitMQ, SQL, Kubernetes, GCP, NoSQL, CI/CD, Agile, DistributedSystems 🏢 Description: Expert Java Engineer We are looking for an Expert Java Engineer to join a global team building and evolving mission-critical financial systems. This role is ideal for an experienced back-end engineer who enjoys designing scalable solutions, influencing architecture, and working on high-performance distributed systems. 📍 Location: Kraków, Poland (Hybrid – 6–8 office visits per month)* 💰 Rate: Up to 190 PLN/h (B2B) * Hybrid Model Based in Kraków with 6–8 office days per month . Candidates living outside Kraków are welcome to apply. If you are willing to travel to the office, we will cover your travel and accommodation costs . Responsibilities: Design and develop scalable microservices and REST APIs. Build high-performance, highly available back-end applications. Develop and operate cloud-native solutions on Kubernetes and GCP. Contribute to architecture decisions and technical roadmaps. Optimize databases, integrations, and distributed systems. Drive engineering best practices across CI/CD, security, and software quality. Collaborate closely with business stakeholders and global engineering teams. Mentor developers and support technical delivery. We are looking for: 5+ years of professional software engineering experience. Strong hands-on experience with Java. Solid experience with REST APIs and microservices architecture. Experience with messaging systems (RabbitMQ or similar). Strong SQL database knowledge. Hands-on experience with Kubernetes. Experience working with cloud platforms (preferably GCP). Knowledge of NoSQL databases and distributed systems. Experience with CI/CD pipelines and Agile methodologies. Strong understanding of scalability, performance, and high-availability architectures. Experience in the banking or capital markets domain, preferably related to trade lifecycle, post-trade processing, or FX products. Nice to Have Experience with Go or Rust. Experience with ClickHouse or other analytical databases. Front-end development experience. Knowledge of API governance. Experience with large-scale data processing environments. This role is not perfectly suited for you, but you have a friend who would fit? Recommend your friend and get up to 5000 zł! Referral Program: Talent from your network Don't hesitate and apply now! Nr ref.: 32/6/2026/r/3612

🏢 Summary: Mid-Level Java/Kafka Fullstack Developer role focused on modernizing legacy payment systems to ISO20022 standards within a distributed microservices environment. The position involves designing, developing, and integrating high-quality backend and fullstack solutions using Java and Kafka in a hybrid work model in Warsaw. The role supports global financial messaging transformation projects in a payments engineering context. 🗂️ Requirements: 4+ years of professional software development experience, Strong proficiency in Java and Spring frameworks, Experience with Hibernate and DB2, Hands-on experience with Apache Kafka (producers, consumers, Streams, Connect), Experience with MongoDB, Experience in RESTful API development, Knowledge of microservices or event-driven architectures, Experience with Docker, Experience with Git and CI/CD pipelines, Experience with Maven multi-module projects, Communicative Polish, Communicative English, Legal right to work in the European Union 📃 Skills: Java, Spring, Hibernate, DB2, Kafka, MongoDB, REST, Docker, Git, GitLab, CI/CD, Maven, ISO20022, SWIFT, CBPR+, FIN, Microservices 🏢 Description: Empower Financial Innovation - Redefine Payment Systems with Next-Gen Technology! Warszawa-based opportunity with hybrid work model As a Senior Java/Kafka Developer – Payments and Financial Messaging , you will be working for our client, a leader in the financial services industry, dedicated to transforming payment systems and implementing cutting-edge messaging standards. Join a dynamic team focused on adapting legacy applications to non-discretionary ISO20022 standards, enabling secure and efficient financial messaging worldwide. This role offers an exciting pathway for career growth within a forward-thinking organization committed to innovation. Your main responsibilities: Collaborate in requirements gathering sessions with business stakeholders to ensure technical solutions meet business needs Analyze, design, and plan impactful technical changes within complex payment systems Develop, test, and deploy modifications to legacy applications aligned with ISO20022 standards Conduct code reviews, support UAT processes, and assist with seamless code releases Apply creative problem-solving to improve the tech stack and optimize system performance Reverse engineer complex code bases to implement high-impact modifications effectively You're ideal for this role if you have: Minimum 5 years of professional experience in Java development Strong expertise in Java, Spring, Hibernate, and DB2 Experience with Spring Boot, dependency injection, auto-configuration, and Spring Data Hands-on knowledge of Apache Kafka (producers, consumers, Kafka Streams, Kafka Connect) Familiarity with RESTful API development, and microservices architectures Knowledge of containerization tools like Docker Proficiency with Git, CI/CD pipelines (preferably GitLab CI) It is a strong plus if you have: Past experience in financial services, banking technology, or payments industry is a plus Understanding of financial messaging standards such as ISO 20022, SWIFT, CBPR+ or FIN Experience with IBM MQ / JMS - queue managers and channels Infrastructure as Code expertise - provisioning and managing infrastructure Language Required for the role: Fluent Polish and English communication skills 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.