{"id":1993477,"url":"https://alion.io/job/six-senior-java-software-engineer","title":"Senior Java Software Engineer","company":{"id":47665,"name":"SIX","domain":"six-group.com","url":"https://alion.io/company/six","size_band":"501-1000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SuccessFactors","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":60000,"max_usd":99000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":300},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GitLab","optional":false},{"name":"Kubernetes","optional":false},{"name":"OpenShift","optional":false},{"name":"Podman","optional":false},{"name":"Rest API","optional":false},{"name":"JavaScript","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-07T07:54:19Z","employer_posted_date":"2026-10-07","last_verified_at":"2026-10-11T22:33:09Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"What sets us apart drives us ahead: between local roots and global relevance, we are a unique blend of tradition and future, of foundation and growth. We value bright minds and inspire them to grow with their ideas. Come and shape the future of finance with us.\n Senior Java Software Engineer\nWarsaw|1| Reference8325\nAre you passionate about building robust, scalable software that powers critical financial services? Do you thrive in an environment where you can influence architecture, drive technical excellence, and work with modern cloud-native technologies? If so, we'd love to hear from you.\nAs a Senior Java Software Engineer, you will play a key role in the evolution of our cloud-based platforms, working alongside a diverse international team of engineers, architects, and product experts. You will help design and deliver high-performance solutions, modernize application landscapes, and contribute to products that create real value for our customers.\nThis role offers the opportunity to work with modern technologies, take ownership of technical decisions, and collaborate in a flexible hybrid work environment.\nWhat You'll Do\nDrive Architecture & Design: Contribute to the design and evolution of a complex application landscape, ensuring solutions are scalable, secure, and maintainable.\nBuild Innovative Solutions: Develop and enhance business-critical functionality using modern Java technologies and cloud-native engineering practices.\nCollaborate Across Teams: Partner with product managers, architects, business stakeholders, and fellow engineers to deliver impactful outcomes.\nChampion Technical Excellence: Lead initiatives focused on performance optimization, data processing, system scalability, reliability, and code quality.\nOwn the Full Lifecycle: Contribute throughout the software development lifecycle, from design and implementation to deployment, support, and continuous improvement.\nSupport DevOps Practices: Actively participate in operating and enhancing production services as part of a DevOps culture.\nWhat You'll Bring\nStrong Java Expertise: Proven experience developing large-scale, distributed backend applications using Java 17/21.\nCloud-Native Engineering: Hands-on experience with Kubernetes/OpenShift, container technologies (Docker/Podman), and cloud-based application development.\nAPI & Event-Driven Systems: Solid understanding of REST APIs, JSON, Apache Kafka, and event-driven architectures.\nMicroservices Architecture: Practical experience designing, building, and operating microservice-based solutions.\nModern Engineering Practices: Strong advocate of automated testing, code reviews, CI/CD, observability, and technical documentation.\nVersion Control & DevOps Tooling: Experience working with GitLab and modern software delivery pipelines.\nExcellent Communication: Strong collaboration and communication skills, with professional proficiency in spoken and written English.\nNice to Have: Experience with JavaScript/TypeScript and modern frontend technologies.\nIf you have any questions, check out our FAQ page or call Agnieszka Leputaat .\nFor this vacancy we only accept direct applications.\nDiversity is important to us. 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