Senior Java Developer

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. Discover our latest job openings: https://en.antal.pl/candidates  Follow us on LinkedIn: https://www.linkedin.com/company/antalpoland