Backend Java Developer (m/f/x)

IN GROUPEA specialist in identity, secure transactions, and digital services, IN Groupe is the global leader in secure identity and trust services. Every day, our 4,000 employees across 40 countries work to ensure that everyone has access to a reliable and secure identity, both in the physical and digital worlds. With our solutions and our international network of 10 R&D centers, we support governments and businesses in more than 130 countries. Joining IN Groupe means helping to shape the future of the identity and secure transaction market. Become part of our international teams — driven by innovation and proud to design solutions that make life easier and protect personal data for millions of people around the world. ABOUT THE TEAMYou will join a team of experienced specialists dedicated to delivering secure, stable, and high‑quality digital identity solutions. Reliability and IT security are at the core of everything we build — from applied cryptography to user‑facing authentication flows. The team operates in a collaborative Scrum setup, working closely with architects, developers, business analysts, testers, a Product Owner, and other key stakeholders. Together, we design and deliver enhancements and updates to the MitID platform. ABOUT THE ROLEAs a Backend Java Developer, you will be part of a highly professional environment focused on building secure, reliable, and scalable backend services for national digital identity infrastructure. Your work will revolve around Java‑based backend development, applied cryptography, high availability, and continuous improvement of mission‑critical systems. You will design, develop, and maintain backend components, ensure code quality, troubleshoot complex issues, and contribute to the evolution of our platform. You will also collaborate closely with other team members to ensure seamless integration, stable deployments, and high‑quality delivery across environments. MAIN RESPONSABILITIESBackend software development — designing and implementing high‑quality backend components in Java. Writing clean and maintainable code based on technical and functional specifications. Technical documentation — preparing and maintaining documentation for knowledge sharing and reporting. Defect analysis — identifying, analyzing, and resolving software issues. Troubleshooting, debugging, and enhancing existing backend services. Verifying and deploying programs and systems across relevant environments. Contributing to continuous improvement initiatives within the development team. Collaborating with architects, testers, and other developers to ensure secure and stable delivery. REQUIREMENTSExperience in developing enterprise IT systems and complex backend solutions. Strong hands‑on experience with Java, Spring Boot, Hibernate, and containerized environments such as OpenShift. Understanding of cryptographic concepts and experience with security‑related systems. Experience with relational databases (preferably Oracle). Practical experience with CI/CD tools such as Jenkins. Experience using Jira, Confluence, or similar platforms. Experience with automated testing tools such as JUnit. Strong understanding of REST APIs and backend architectural principles. Familiarity with DevOps practices and related toolchains. Proficiency in written and spoken English. Nice to HaveExperience with frontend development (especially Angular). Knowledge of Agile/Scrum methodologies. Motivation and ability to learn new technologies. Strong communication skills and the ability to collaborate effectively in a team. BENEFITS OF JOINING IN GROUPE✨ What you’ll get (beyond the job itself)At IN Groupe, we build secure identities and digital trust for millions of people worldwide - but we also make sure our teams feel secure, supported, and inspired every day. Here’s what that means in practice: Most important: employment based on an employment contract🧑‍⚕️ Your health & security come firstPrivate medical care (Medicover) - base package fully covered for you, with the option to include your loved onesGroup life insurance - base package fully financed by the companyAccess to a benefits cafeteria - flexible and not limited to sports or culture🧠 Grow your skills. Shape your path. Annual development budget (2000 PLN) - use it for conferences, books, or training that actually supports your workAccess to IN Academy - our global learning platform co-created by employees across the groupEnglish classes during working hours🏋️ Stay active, your wayMultisport card (60% co-financed) with multiple package optionsPossibility to include family members - kids, students, and seniors🏢 Work comfortably - in a way that suits youHybrid model - 3 days from the officeFree parkingOffice stocked with coffee, fresh fruit, and snacks🤝 A team you actually want to spend time withWe’re a growing, 40-person team in Poland - small enough to know each other, big enough to make an impact. Regular team integrations and meetupsMonthly “Coffee Talks” - project updates, knowledge sharing, and good foodInternal tech & topic meetups with invited speakers (you help choose the topics)🎲 More than just workPing-pong tournaments, board game sessions, and informal hangoutsCommunity team - join it and have a real influence on company initiatives, events, and workplace experience🌍 Work that mattersYou’ll be part of a global organization with a unique legacy (Imprimerie Nationale) and a clear mission: to protect identities and secure digital interactions for millions of people worldwide.💡 Why it’s different hereWe combine the stability and scale of an international group with the atmosphere of a close-knit team in Poland. You’re not just joining a company - you’re helping build how trust works in the digital world.