{"id":3162187,"url":"https://alion.io/job/infolet-java-developer-8625","title":"Java Developer (86/25)","company":{"id":4160520,"name":"Infolet","domain":"infolet.pl","url":"https://alion.io/company/infolet","size_band":"11-50","is_staffing_agency":true,"employer_type":"agency","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitify","truth_index":{"grade":"B","score":81,"open_postings":4,"ghost_share":0,"stale_share":0.75,"repost_share":0,"time_to_fill_p50_days":27,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":18000,"max":22000,"currency":"PLN","period":"month","gross":null,"usd_annual":67236},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Hibernate","optional":false},{"name":"Java","optional":false},{"name":"Kanban","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false},{"name":"ActiveMQ","optional":true},{"name":"Apache Kafka","optional":true},{"name":"AWS","optional":true},{"name":"JavaScript","optional":true},{"name":"Jira","optional":true},{"name":"Kubernetes","optional":true},{"name":"LLM","optional":true},{"name":"PowerShell","optional":true},{"name":"React.js","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-23T12:53:40Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-29T00:11:43Z","board_verified":true,"closed_at":null,"days_open":5,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":5},"description":"SUMMARY\n110 - 135 PLN/h (B2B)\n13 200 - 16 200 PLN brutto (UOP)\nHybrid (Cracow) or remote\nMid/Senior\nProject\nJoin the team developing Flight Plan Manager, an advanced flight planning solution used by over 30 customers, including major international airlines.\nThe product optimises flight routes, altitude, speed, and timing while considering fuel costs, CO₂ emissions, weather conditions, airspace restrictions, and delays. It is available as both an on-premises solution and a SaaS platform.\nYou will\nDesign, develop, and estimate new product features within a Scrum team\nDevelop automated tests and apply Test-Driven Development (TDD) practices\nMaintain and refactor complex codebases, including legacy systems\nApply SOLID principles and software engineering best practices\nDebug applications, analyse performance, and resolve functional and non-functional issues\nParticipate in code reviews and technical documentation\nCollaborate with distributed engineering teams and demonstrate solutions to internal and external customers\nMust have\n5+ years of professional Java development experience\nStrong knowledge of Spring and Hibernate\nUnderstanding of microservices architecture and design patterns\nExperience with API design and SQL databases\nKnowledge of algorithms, SOLID principles, and software design practices\nExperience with Git and Docker\nUnderstanding of the software development lifecycle and Scrum 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