{"id":4258586,"url":"https://alion.io/job/itds-poland-senior-javareact-full-stack-developer","title":"Senior Java/React Full-Stack Developer","company":{"id":879,"name":"ITDS Poland","domain":"itds.pl","url":"https://alion.io/company/itds","size_band":"501-1000","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":27300,"max":32760,"currency":"PLN","period":"month","gross":null,"usd_annual":98880},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"CI/CD","optional":false},{"name":"ETL/ELT","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-11-13T14:15:16Z","employer_posted_date":null,"last_verified_at":"2026-11-13T14:15:16Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Shape the future of WorkSync — build seamless, scalable solutions across the full technology stack!\nKrakow-based opportunity with a hybrid work model: 3 days remote and approximately 6 days per month in the office.\nAs a Senior Java/React Full-Stack Developer, you will be working for our client on the development and evolution of the WorkSync solution. You will contribute to its technical direction while building reliable frontend and backend features, integrating services and APIs, and supporting high-quality releases in a collaborative international environment.\nYour main responsibilities:\nContribute to the WorkSync solution design and technical direction.\nBuild and maintain frontend and backend features.\nDevelop and integrate services and APIs.\nWrite and execute appropriate software tests.\nParticipate in quality assurance activities and defect investigations.\nSupport release validation and continuous delivery of new features.\nCollaborate effectively with teams across the project.\nYou're ideal for this role if you have:\nAt least 5 years of professional experience in full-stack software development or a similar role.\nStrong frontend and backend development experience.\nProficiency in Java, Web API, JavaScript, React or another JavaScript framework, HTML, and CSS.\nExperience with SQL and databases.\nKnowledge of software testing and QA support activities.\nExperience with the software development life cycle and Git.\nStrong problem-solving skills, attention to detail, and effective interpersonal skills.\nIt is a strong plus if you have:\nExperience with PostgreSQL.\nETL/ELT experience.\nKnowledge of Node.js or Groovy.\nExperience with automated testing.\nLanguage Required for the role: Communicative English, at least B2 level.\nEligibility for the role: Only candidates with an existing legal right to work in Europe will be considered for this role.\n#MAKEYourCareerBETTER\nInterested? 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