Senior Software Engineer (Java / Microservices)

🏢 Summary: Senior Software Engineer role focused on designing and developing microservices in a large-scale distributed system using Java 21 and Spring Boot. The position involves building event-driven solutions, applying Hexagonal Architecture, and delivering production-ready features in a CI/CD and Kubernetes environment. The team operates in an AI-first model, requiring daily use of Claude Code and strong ownership from analysis to deployment. 🗂️ Requirements: Strong hands-on experience with Java 21+, Solid experience with Spring Boot MVC, Practical experience with Apache Kafka, Experience with PostgreSQL and/or MongoDB, Knowledge of Hexagonal Architecture, Experience in microservices-based systems, Experience with event-driven architecture, Experience with Transactional Outbox pattern, Knowledge of OAuth2 and JWT, Experience with Spring Security, Experience with automated testing (unit, integration, contract), Experience with Docker and Kubernetes, Proficiency with Claude Code AI tool 📃 Skills: Java, Spring, SpringBoot, Kafka, PostgreSQL, MongoDB, JPA, Hibernate, R2DBC, Avro, Confluent, OAuth2, JWT, SpringSecurity, OpenFGA, Spock, Testcontainers, WireMock, RESTAssured, ArchUnit, PIT, Gradle, GitLabCI, Docker, Kubernetes, Helm, Micrometer, Prometheus, SonarQube, Checkstyle, ClaudeCode 🏢 Description: Senior Software Engineer — Java / Microservices Start date: ASAP | Contract type: B2B  (145-170pln) | Work mode: 100% Remote About the Team You'll be joining a multidisciplinary team of senior engineers within a Consumer & Merchant domain, working on end-to-end parcel creation flows and some of the company's largest technical initiatives. The team operates with high autonomy — engineers have real influence over architectural decisions and drive solutions from analysis all the way to production. The culture is built on knowledge sharing, mutual respect, and engineering excellence , with a genuinely friendly atmosphere. Your Responsibilities Design and implement microservices following Hexagonal Architecture principles within a large-scale distributed system Drive topic analysis and requirement discovery — from business needs to solution architecture and delivery Build and maintain event-driven integrations using Kafka, Avro, and the Transactional Outbox pattern Write comprehensive automated tests : unit, integration, contract (Spock, Testcontainers, Spring Cloud Contract) Participate actively in code reviews and help raise the bar on code quality Work in a CI/CD environment : GitLab CI, Docker, Kubernetes + Helm (GitOps) Use AI-assisted development tools (Claude Code is the team standard) as a primary daily productivity tool — agentic, AI-first development is how this team operates Tech Stack Language & Frameworks: Java 21, Spring Boot 3.x/4.x (MVC & WebFlux), Gradle Databases: PostgreSQL (JPA/Hibernate, R2DBC), MongoDB Messaging: Apache Kafka + Avro + Confluent Schema Registry Patterns: Hexagonal Architecture, Microservices, Event-Driven Design, Transactional Outbox Security: OAuth2 / JWT, Spring Security, OpenFGA Testing: Spock Framework, Testcontainers, WireMock, REST-Assured, ArchUnit, PIT Mutation Testing Infrastructure: GitLab CI, Docker, Kubernetes + Helm (GitOps) Observability: Micrometer, Prometheus, SonarQube, Checkstyle AI Tooling: Claude Code (mandatory) / GitHub Copilot / Cursor Requirements Must have: Strong, hands-on experience with Java 21+ and Spring Boot MVC Solid knowledge of Kafka , PostgreSQL and/or MongoDB Familiarity with Hexagonal / Clean Architecture erns:** Hexagonal Architecture, Microservices, Event-Driven Design, Transactional Outbox Security: OAuth2 / JWT, Spring Security, OpenFGA Testing: Spock Framework, Testcontainers, WireMock, REST-Assured, ArchUnit, PIT Mutation Testing Infrastrucy proficiency with AI coding tools — Claude Code** is the team standard; experience with agentic development workflows is a strong plus Nice to have: Experience with Spring WebFlux (reactive stack) Familiarity with OpenFGA or similar fine-grained authorisation systems Background in Consumer-Driven Contract testing (Spring Cloud Contract) What Makes This Role Challenging Complex distributed system — dozens of microservices with numerous communication channels; understanding the big picture is as important as writing good code Near-100% uptime requirement — business-critical systems where reliability and fault tolerance are non-negotiable High autonomy from day one — independently analyse topics, identify stakeholders, and deliver solutions end-to-end AI-first way of working — using Claude Code and agentic workflows to accelerate delivery is a core part of how the team operates, not a nice-to-have 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. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Senior Java Developer role focused on building and integrating production-grade Java microservices within an AI-enabled delivery programme. The position involves solution design, CI/CD quality enforcement, GenAI integration, and secure, observable service delivery in a cloud environment. Hybrid work model in Kraków with B2B contract. 🗂️ Requirements: Strong experience building Java microservices with Spring Boot, Solid experience with RDBMS (Oracle or PostgreSQL), Hands-on unit and integration testing using JUnit, Mockito, Testcontainers, Experience with CI/CD pipelines and quality gates, Understanding of REST and messaging/event-driven integration patterns, Hands-on experience with GCP, Practical experience with GenAI concepts and engineering tooling, Familiarity with RAG and agent patterns, Ability to contribute to technical design and resolve technical risks 📃 Skills: Java, SpringBoot, Microservices, Oracle, PostgreSQL, JUnit, Mockito, Testcontainers, Jenkins, GitLab, Sonar, SAST, DAST, REST, Messaging, GCP, GenAI, LLMs, RAG, Kubernetes, Docker, Copilot 🏢 Description: Location: Kraków (2 times per week from the office) B2B | 220–240 PLN netto/hour About the Role: We are looking for a skilled and motivated Senior Java Developer to join the AI‑Enabled Delivery Programme within the Global Collateral & Facility Management area. In this role, you will develop and integrate production‑grade Java microservices, contribute to solution design, and work across multiple workstreams. You will collaborate closely with Tech Leads, architects, QA, platform teams, and engineering partners to deliver secure, well‑tested, and reliable services. Key Responsibilities: Build, test, release, and support Java microservices Contribute to solution design aligned with architecture and non‑functional requirements Identify and resolve technical risks, dependencies, and delivery blockers Follow engineering standards (coding, branching, CI/CD quality gates, test strategy) Deliver unit, integration, and contract tests with measurable coverage Participate in design, code, and security reviews Use AI‑assisted tooling (e.g., Copilot) responsibly to accelerate delivery Apply guardrails for AI‑generated code (reviews, secure coding, traceability) Use GenAI techniques where appropriate (LLMs, prompt engineering, validation) Contribute to GenAI‑enabled patterns (LLMs, RAG, agent workflows) Embed security‑by‑design and vulnerability management Build production‑ready services with observability and performance readiness Support release activities, integration, and environment preparation Collaborate with Tech Leads, QA, SRE, architects, and platform teams Requirements: Strong hands‑on experience building Java microservices (Spring Boot) Solid experience with RDBMS (Oracle/PostgreSQL) Strong unit and integration testing practices (JUnit, Mockito, Testcontainers) Experience with CI/CD pipelines and quality gates (Jenkins/GitLab, Sonar, SAST/DAST) Good understanding of integration patterns (REST, messaging/eventing) Experience contributing to technical design and making pragmatic trade‑offs Hands‑on experience with GCP Practical exposure to GenAI concepts and engineering tooling Familiarity with RAG/agent patterns and governance Nice to Have: Experience delivering regulated financial services platforms Exposure to cloud‑native patterns (containers, Kubernetes, service mesh) Experience with performance engineering and resilience testing Experience implementing AI‑enabled SDLC practices Hands‑on experience with GenAI integrations (RAG pipelines, evaluation, prompt/versioning) What We Offer: Opportunity to work on strategic, high‑impact engineering initiatives Exposure to modern AI‑enabled SDLC practices Flexible working model Supportive, international engineering environment Benefits package: Multisport Card, Luxmed 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. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: B2B contract role for a Senior Java Developer to design and build high‑performance, low‑latency backend services for trading and risk systems within an international Agile team. The position focuses on developing microservices, REST APIs and distributed components supporting critical transaction workflows. You will influence architecture and engineering standards while optimizing scalability, stability and performance. 🗂️ Requirements: 5+ years Java backend development experience (Java 11+), Strong knowledge of REST and HTTPS, Experience with microservices architecture, Experience with messaging systems (MQ), Experience with SQL, Experience with Postgres, Sybase or similar database, Experience leading delivery of Java-based modules or services, Experience working in Agile environment, Fluent English 📃 Skills: Java, REST, HTTPS, Microservices, MQ, SQL, Postgres, Sybase, CI/CD, Agile 🏢 Description: Senior Java Developer 📍 Location: Kraków, Poland (hybrid: 2 days in the office, 3 days remote) 📄 B2B Contract: 190 – 230 PLN / hour We are looking for a proactive Senior Java Developer to join an international Agile team building high‑performance backend solutions for trading and risk‑related systems. You will work closely with engineers and analysts to design, develop and optimize services supporting critical business processes. This role offers the opportunity to work on low‑latency, high‑throughput applications and influence architecture, engineering standards and delivery quality across a complex technology landscape. Key Responsibilities: Design and develop backend services and microservices in Java. Build and maintain RESTful APIs and distributed system components. Develop high‑availability, high‑performance solutions supporting trading workflows. Integrate with internal platforms and support end‑to‑end transaction lifecycle. Optimize system performance, stability and scalability. Collaborate with global engineering and business teams. Participate in Agile ceremonies: sprint planning, reviews, retrospectives and daily stand‑ups. Requirements: 5+ years of experience in Java backend development (Java 11+). Strong knowledge of REST, HTTPS, microservices and messaging (MQ). Experience with SQL and at least one mainstream database (Postgres, Sybase or similar). Experience owning or leading delivery of Java‑based modules or services. Strong analytical and problem‑solving skills. Very good communication skills in English. Ability to work in a dynamic environment and handle pressure. Curiosity, proactiveness and continuous learning mindset. Nice to Have: Experience in production environments. Experience with Agile development and CI/CD. Domain knowledge in financial systems: trade lifecycle, post‑trade, FX. What We Offer: Long‑term cooperation within an international engineering environment. Real influence on architecture, engineering standards and delivery quality. Work in a multicultural, distributed setup. Private medical care (LuxMed) and Multisport card. Hybrid model: 2 days per week in the Kraków office. 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 Backend Engineer role focused on designing and building scalable Java-based microservices and REST APIs for a global payments platform. The position involves modernizing legacy systems into cloud-native architectures and improving reliability and performance in a Kubernetes environment. You will work on high-scale international payment solutions within a hybrid setup in Kraków. 🗂️ Requirements: Strong experience with Java 11+, Experience building microservices, Experience developing REST APIs, Hands-on experience with Kubernetes, Solid knowledge of SQL and relational databases, Experience with Git, Experience working in Unix/Linux environments, Understanding of DevOps practices 📃 Skills: Java, Spring, Kubernetes, SQL, Oracle, Git, Linux, Unix, REST, Microservices, CI/CD, React 🏢 Description: Senior Software Engineer (Backend) – Java 📍 Kraków | Hybrid (2x day per week from the office) We are looking for an experienced Senior Software Engineer (Backend) to join a global technology team working on a large-scale payments platform that enables businesses and customers worldwide to move funds quickly and securely across markets. The platform supports international transfers, supplier payments, payroll processing, and payments to authorities across multiple channels. You will contribute to building modern, scalable systems used globally. What you will be doing • Design, develop and maintain backend services and microservices in Java • Build scalable REST APIs supporting a global payments platform • Contribute to the migration from legacy systems to a modern microservices architecture • Work with Kubernetes-based platforms and cloud-native environments • Improve system reliability, performance and Straight‑Through‑Processing (STP) capabilities • Collaborate with international engineering teams, DevOps and product stakeholders • Contribute to test automation and modern CI/CD practices What we are looking for • Strong experience with Java (11+) , ideally Java 17+ • Experience building microservices and REST APIs • Hands-on experience with Kubernetes • Solid knowledge of SQL and relational databases (Oracle is a plus) • Experience with Git and modern development workflows • Comfortable working in Unix/Linux environments • Understanding of DevOps ways of working Nice to have: • Experience with Spring / Spring Boot • Experience with React or modern frontend technologies • Familiarity with application monitoring / observability tools What we offer • Opportunity to work on a global, high-scale payments platform • Collaboration with international engineering teams • Modern technology stack and cloud-native environment • Hybrid work model in Kraków 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 Software Engineer role focused on designing, building, and supporting scalable applications in the financial domain within a small Agile team. The position covers the full software development lifecycle, including analysis, design, implementation, testing, deployment, and production support. It emphasizes microservices and event-driven architecture with strong engineering standards and ownership. 🗂️ Requirements: Minimum 5 years of professional software development experience, Strong knowledge of Java, Strong knowledge of Python, Hands-on experience with Spring Framework, Understanding of SOLID principles, Knowledge of Clean Code practices, Experience with DDD and BDD, Experience with SQL and NoSQL databases, Experience with PostgreSQL, Experience with MongoDB, Familiarity with microservices architecture, Experience with event-driven or streaming systems 📃 Skills: Java, Python, Spring, SQL, NoSQL, PostgreSQL, MongoDB, Microservices, EventDriven, SOLID, CleanCode, DDD, BDD 🏢 Description: Senior Software Engineer 📍 Kraków, Poland (hybrid – min. 2 days/week in the office) 🕒 Full-time | B2B 190-230PLN netto/h About the Role We are looking for an experienced Senior Software Engineer to join a global technology team delivering innovative digital solutions in the financial domain. In this role, you will work closely with a Development Manager and a small, cross-functional team to build and maintain scalable applications. You will be involved in the entire software development lifecycle – from analysis and design to deployment and production support. This is a hands-on role in a collaborative environment where teams take full ownership: “you build it, you support it.” Your Responsibilities Work in a small Agile team (4–6 people) with a dedicated Product Owner Translate business requirements into user stories and deliver them iteratively to production Design and implement high-quality, scalable solutions aligned with technical standards Participate in all stages of the development lifecycle, including testing and production support Identify and manage technical debt, balancing it with new feature development Collaborate closely with team members through pairing and knowledge sharing Contribute to a culture of continuous improvement and experimentation Required Skills & Experience Minimum 5 years of professional software development experience Strong knowledge of Java and Python Hands-on experience with Spring Framework Solid understanding of software engineering principles ( SOLID, Clean Code, DDD, BDD ) Experience with SQL and NoSQL databases (e.g., PostgreSQL, MongoDB) Familiarity with microservices architecture Experience with event-driven systems / streaming technologies Strong communication skills in English (written and spoken) Ability to collaborate, mentor, and support other engineers Nice to Have Experience with JavaScript (Vue.js) Background in AI / Machine Learning / NLP / Data Science Knowledge of: Prompt Engineering LangChain / LangGraph Clean Architecture What You Can Expect Work in a globally distributed engineering organization Small, self-organizing teams with strong ownership Continuous delivery approach (no traditional sprints – focus on flow and frequent releases) Opportunity to work on cutting-edge AI-driven solutions Exposure to modern technologies and experimentation with new tools A collaborative culture where learning, pairing, and knowledge sharing are encouraged Benefits: Multisport Card and Luxmed Who We’re Looking For We value engineers who: Are curious, adaptable, and open to experimentation Enjoy solving complex problems with technology Take ownership and responsibility for their work Are comfortable stepping outside their specialization when needed See failure as a learning opportunity 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 Engineer role in a global banking transformation programme focused on building a next-generation in-house Collateral & Facility Management platform. The position involves developing enterprise-grade microservices on GCP while leveraging GenAI-assisted SDLC practices. You will deliver secure, scalable, production-ready solutions within international cross-functional teams. 🗂️ Requirements: Strong hands-on experience with Java, Strong hands-on experience with Spring Boot, Experience building production-grade microservices, Experience with distributed systems, Experience with Oracle and/or PostgreSQL, Experience with JUnit, Mockito, Testcontainers, Experience with API and contract testing, Experience with CI/CD pipelines, Experience with Jenkins or GitLab, Experience with SonarQube and SAST/DAST tools, Understanding of RESTful APIs and event-driven architectures, Hands-on experience with GCP, Knowledge of secure software development practices, Practical exposure to LLMs and GenAI-assisted development 📃 Skills: Java, Spring, SpringBoot, GCP, Oracle, PostgreSQL, JUnit, Mockito, Testcontainers, Jenkins, GitLab, SonarQube, SAST, DAST, REST, Microservices, CI/CD, LLM, GenAI 🏢 Description: 📍 Location: Kraków (hybrid: 2 days in the office / 3 days remote) 📄 B2B: 200 - 250 PLN/h 🏦 Industry: Banking We are currently looking for an experienced Senior Java Engineer with GCP / GenAI to join a strategic global banking programme focused on building next-generation Collateral & Facility Management capabilities. The initiative involves developing an in-house enterprise platform that will replace an existing commercial solution, leveraging modern engineering practices and an AI-enabled Software Development Lifecycle (SDLC). This role combines hands-on software engineering, cloud technologies, modern integration patterns, and responsible adoption of AI-assisted development. You will work within international cross-functional teams delivering scalable, secure, and production-ready solutions while contributing to the adoption of GenAI-powered engineering practices across the programme. Key responsibilities: Design, develop, test, and maintain enterprise-grade Java microservices and backend components. Contribute to solution architecture and integration design, ensuring alignment with target architecture and non-functional requirements. Deliver high-quality production code with a strong focus on security, resilience, maintainability, and performance. Build and support distributed services running in cloud environments. Develop robust automated testing strategies, including unit, integration, and contract testing. Participate in technical design reviews, code reviews, and security reviews, ensuring engineering quality standards are met. Collaborate with architects, Tech Leads, QA, SRE, platform teams, and business stakeholders to deliver integrated solutions. Support CI/CD processes, quality gates, and release management activities. Apply AI-assisted development tools and GenAI techniques responsibly to accelerate software delivery while maintaining governance, traceability, and security standards. Contribute to AI-enabled engineering practices, including LLM-assisted development, RAG concepts, and agent-based automation patterns. Promote engineering excellence, continuous improvement, and knowledge sharing across teams. Requirements: Strong hands-on experience with Java and Spring Boot in enterprise-scale environments. Experience building and maintaining production-grade microservices and distributed systems. Solid experience with relational databases ( Oracle and/or PostgreSQL ), including schema design, performance optimization, and transactional integrity. Strong testing background, including JUnit, Mockito, Testcontainers , API testing, and contract testing. Practical experience with CI/CD pipelines , quality gates, and code quality tools (e.g., Jenkins, GitLab, SonarQube, SAST/DAST). Good understanding of API design, RESTful services, messaging, and event-driven architectures. Experience contributing to technical design decisions and balancing business requirements with engineering best practices. Hands-on experience working with Google Cloud Platform (GCP) . Understanding of secure software development practices and operational readiness requirements. Practical exposure to GenAI tools and concepts , including LLMs and AI-assisted software development workflows. Strong communication skills and ability to work effectively within international, cross-functional teams. Nice to have: Experience delivering solutions within highly regulated financial services environments. Knowledge of cloud-native technologies, containers, Kubernetes, and service mesh architectures. Experience with observability platforms, resilience testing, and performance engineering. Hands-on experience implementing or integrating GenAI solutions such as RAG pipelines, prompt engineering, evaluation frameworks, or AI governance controls. Experience driving AI-enabled SDLC initiatives and engineering productivity improvements. Understanding of modern software delivery practices and platform engineering principles. What we offer: Opportunity to work on a strategic global banking transformation programme. Exposure to cutting-edge AI-enabled software engineering practices and cloud technologies. Collaboration with highly experienced international engineering and architecture teams. Long-term cooperation within a stable enterprise-scale environment. Private healthcare package (LuxMed). Multisport card. 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: Lead Software Engineer (Java) role focused on developing and modernizing a large-scale international payment platform in a financial services environment. The position combines hands-on development with technical leadership, emphasizing microservices, API-first architecture, and DevOps practices. The engineer will design, build, and optimize high-performance systems supporting global payment operations. 🗂️ Requirements: Minimum 10 years of professional IT experience, Strong knowledge of Java 11+ (Java 17+ preferred), Experience with Spring and Spring Boot, Strong knowledge of SQL and relational databases (Oracle preferred), Experience designing REST APIs, Experience with microservice architectures, Experience working in DevOps teams, Experience with Kubernetes, Experience with Git 📃 Skills: Java, Spring, SpringBoot, SQL, Oracle, REST, Microservices, Kubernetes, Git, React, JavaScript, DevOps 🏢 Description: 📍 Location: Kraków (hybrid - 2 days in the office per week) 📄 B2B: 200–250 PLN / h 🏦 Industry: Financial Services / Payments We are looking for a Lead Software Engineer (Java) to work on an international payment platform used in a large-scale enterprise environment. The system supports a variety of financial transfers and payment operations across multiple regions. This role combines technical leadership and hands-on development, including mentoring a development team and designing modern software solutions. You will work in an Agile environment with a focus on microservices, API-first architecture, and DevOps practices. Key Responsibilities: Provide technical leadership and mentorship to the development team. Design, develop, and maintain applications and microservices (backend and frontend). Work with Java 11/17/21 and frontend technologies such as React. Modernize existing systems and migrate to API/microservice-based architectures. Implement and improve automated testing frameworks. Enhance efficiency and automation of processing workflows (STP). Collaborate closely with technical teams and business stakeholders. Requirements: Minimum 10 years of professional experience in IT. Strong knowledge of Java 11+ (Java 17+ preferred). Experience with Spring / Spring Boot. Strong SQL and relational database knowledge (Oracle preferred). Experience designing REST APIs and microservice architectures. Experience working in DevOps teams. Nice to have: Knowledge of JavaScript / React (preferred). Experience with Kubernetes and Git (required). What We Offer: Work on a long-term, international project with high scale and complexity. Real impact on architecture, standards, and best practices. Luxmed healthcare package and Multisport card. Mature engineering environment focused on quality and automation. 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: B2B offer for a Senior Java Engineer in the financial sector, working in a hybrid model (6 days per month from the Kraków office) on international IT projects. The role focuses on developing and maintaining Java-based microservices and REST APIs in an Agile environment with strong emphasis on quality and CI/CD practices. 🗂️ Requirements: Minimum 5 years of experience as Java Developer, Very good knowledge of Java, Very good knowledge of Spring, Experience with REST API development, Experience with microservices architecture, Experience with Docker, Experience with CI/CD and Jenkins, Experience with TDD approach, Troubleshooting skills, Experience working in Agile cross-functional teams 📃 Skills: Java, Spring, REST, Microservices, Docker, CI/CD, Jenkins, TDD, Agile, OOP 🏢 Description: Senior Java Engineer Dla naszego klienta z międzynarodowego sektora finansowego poszukujemy specjalisty na stanowisko Senior Java Engineera. Lokalizacja: praca w modelu hybrydowym 6 dni na miesiąc z biura w Krakowie Współpraca : B2B Wymagania Minimum 5 lat doświadczenia jako Java Developer Bardzo dobra znajomość: Java Spring REST API Mikroserwisy Docker CI/CD (Jenkins) Doświadczenie w pracy z podejściem TDD Umiejętność rozwiązywania problemów (troubleshooting) Doświadczenie pracy w zespołach Agile, cross-funkcyjnych Chęć nauki i rozwoju Mile widziane Znajomość struktur danych i algorytmów Programowanie współbieżne w Javie Dobre praktyki OOP i Clean Code Doświadczenie w projektowaniu bezpiecznych aplikacji Kogo szukamy? Osób otwartych i nastawionych na współpracę Skoncentrowanych na rezultatach i potrzebach użytkownika Komunikatywnych i proaktywnych Ciekawych świata technologii i lubiących rozwiązywać złożone problemy Gotowych kwestionować status quo i proponować usprawnienia Elastycznych i adaptujących się do zmian Oferujemy: Udział w międzynarodowych projektach IT, Stabilne zatrudnienie oraz atrakcyjne warunki wynagrodzenia, Pracę w międzynarodowym środowisku ekspertów, Benefity: LuxMed, kafeteria MyBenefit Co zyskasz dzięki aplikacji na ofertę Antal? Gdy Twoja aplikacja zostanie rozpatrzona pozytywnie (zostaniesz zaproszony/a do procesu), otrzymasz wsparcie Konsultanta/Konsultantki, który/a utrzyma z Tobą stały kontakt (mailowo lub telefonicznie), pomoże Ci przygotować się do rozmowy rekrutacyjnej z przyszłym pracodawcą oraz zatroszczy się o jakość procesu rekrutacyjnego, w którym aktualnie bierzesz udział. Kim jesteśmy? Jesteśmy liderem rekrutacji specjalistów i menedżerów oraz doradztwa w obszarze HR. Marka obecna jest w 35 krajach, w Polsce działa od 1996 roku. Przez ten czas zbudowaliśmy wiele karier kandydatów, dzięki elastycznemu i kompleksowemu podejściu do wszystkich rekrutacji. Antal tworzy ponad 130 profesjonalnych konsultantów ds. rekrutacji, którzy są oni nie tylko skutecznymi rekruterami, ale także wykwalifikowanymi doradcami, specjalizującymi się zarówno w zakresie wybranego sektora, jak i stanowiska. Sprawdź inne aktualne oferty pracy na: https://antal.pl/dla-kandydata Zaobserwuj nasz profil na LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: Full-time/B2B role for an experienced Java Developer to design, develop, and maintain microservices in a financial sector project. The position focuses on building high-quality backend solutions using modern Java and DevOps practices, with strong emphasis on TDD, CI, and system reliability. Hybrid work model with responsibility for both development and platform support. 🗂️ Requirements: 5+ years commercial experience in Java backend development, Experience designing and developing microservices, Proficiency in Java 17/21 and Spring Boot, Strong knowledge of PostgreSQL, Experience setting up and maintaining DevSecOps pipelines, Minimum 3 years working in Agile and/or DevOps teams, Experience with TDD using JUnit, Experience writing integration, regression, and Cucumber tests, Experience working with CI pipelines, Experience in incident resolution and system monitoring 📃 Skills: Java, SpringBoot, PostgreSQL, Microservices, DevSecOps, JUnit, Cucumber, CI, TDD, Agile, DevOps, TypeScript, Angular, HTML5 🏢 Description: For our Client we are looking for an experienced Java Developer who will be responsible for both the development and maintenance of the microservices. 📍 Location : Kraków, hybrid work model – 2 days per week in the office, 3 days remote 🕒 Cooperation model: [Full-time / B2B] 📍 Project for our Client from the financial sector Key Responsibilities: Design, build, and maintain efficient, reusable, and reliable Java code Contribute in all phases of the development lifecycle Adopt DevOps and Agile principles Ensure test-driven development and close collaboration with QA team members Focus on improving the development team velocity and quality Mentor and work with junior members of the team Support the platform: incident resolution, monitoring, problem management Develop automated tooling to improve support functions Requirements: 5+ years of commercial experience in backend development (Java) Designing and developing microservices using Java 17/21 and Spring Boot Strong knowledge of PostgreSQL and DevSecOps pipeline set up / maintenance Self-motivated and willing to learn new technologies and business domain 3+ years working in an Agile and/or DevOps team Excellent communication skills Use TDD with JUnit for unit tests, add integration and regression tests, and write simple Cucumber scenarios for end‑to‑end acceptance, all run in CI. Proven track record of working on significant projects from conception to completion, Ability to translate functional requirements into technical solutions, Should be able to provide innovative solutions to complex business problems Fluent English Experience in TypeScript, Angular, HTML 5 - nice to have Benefits: Private medical care (Luxmed) Multisport card Collaborative team culture and modern tech stack 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. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland

🏢 Summary: B2B contract for an experienced Solution Architect to design and deliver scalable, cloud-native, microservices-based solutions supporting customer lifecycle and digital business processes. The role focuses on defining end-to-end architectures, guiding engineering teams, and ensuring security, performance, and resilience in enterprise environments. Opportunity to work with Cloud, DevSecOps, AI, and modern Java-based technologies in a global setting. 🗂️ Requirements: Proven experience as Solution Architect or Technical Architect, Strong knowledge of application architecture and security principles, Experience designing microservices architectures and RESTful APIs, Hands-on experience with AWS or GCP, Experience with containerization and CI/CD or DevSecOps practices, Excellent knowledge of Java, Understanding of modern frontend technologies (React), Experience with relational databases, data modelling, SQL, PostgreSQL, Experience creating architecture documentation using modeling tools 📃 Skills: Java, AWS, GCP, Microservices, REST, React, SQL, PostgreSQL, CI/CD, DevSecOps, Docker, Kubernetes, Cloud, MachineLearning, AI, VisualParadigm, BizzDesign 🏢 Description: Solution Architect (Java / Cloud / Microservices) Kraków | hybrid 2x per week B2B | up to 250PLN  netto/h About the Role We are looking for an experienced Solution Architect to join a global technology team responsible for designing and delivering modern, scalable solutions supporting customer lifecycle and digital business processes. In this role, you will collaborate closely with business stakeholders, architects, and engineering teams to define end-to-end solution architectures aligned with strategic technology objectives. This is an excellent opportunity to work with modern technologies, including Cloud, Microservices, DevSecOps, AI, and Machine Learning , while shaping enterprise-scale solutions in a complex, international environment. Key Responsibilities Design end-to-end solution architectures that align with business requirements and enterprise technology standards. Collaborate with business stakeholders, architects, and engineering teams to evaluate solution options and define target architecture. Produce architecture documentation and technical designs to support implementation. Guide development teams in implementing scalable, secure, and high-quality solutions based on architectural best practices. Design cloud-native, microservices-based solutions and define API integration strategies. Ensure solution designs meet security, scalability, resilience, and performance requirements. Support the software delivery lifecycle from solution design through production deployment and ongoing optimization. Contribute to resolving complex production issues and identifying opportunities for continuous architectural improvement. Required Skills & Experience Proven experience as a Solution Architect, Technical Architect, or in a similar architecture-focused role. Strong knowledge of application architecture, security principles, and infrastructure design patterns. Solid experience designing microservices architectures and RESTful APIs. Hands-on experience with cloud platforms such as AWS or Google Cloud Platform (GCP) . Strong understanding of containerization technologies and CI/CD or DevSecOps practices. Excellent knowledge of Java and good understanding of modern frontend technologies, preferably React . Experience with relational databases, data modelling, SQL, and PostgreSQL. Experience creating architecture documentation using tools such as Visual Paradigm, BizzDesign, or similar. Nice to Have Knowledge of KYC, Customer Due Diligence (CDD), or Customer Lifecycle Management processes. Exposure to Machine Learning, Generative AI, or intelligent automation solutions. Understanding of network and infrastructure security concepts. Experience working with distributed, global delivery teams. Excellent communication, stakeholder management, and problem-solving skills. What We Offer The opportunity to design and influence enterprise-scale technology solutions in a global environment. Exposure to modern technologies, including Cloud, Microservices, AI, and DevSecOps. Collaboration with highly skilled international engineering and architecture teams. Opportunities for professional growth, continuous learning, and technical leadership. A collaborative and inclusive culture that values innovation, knowledge sharing, and continuous improvement. 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. Discover our latest job openings: https://en.antal.pl/candidates Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland