{"id":2998668,"url":"https://alion.io/job/itds-poland-senior-full-stack-javareact-developer-platform-solutions","title":"Senior Full Stack Java/React Developer – Platform Solutions","company":{"id":879,"name":"ITDS Poland","domain":"itds.pl","url":"https://alion.io/company/itds","size_band":"201-500","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":27720,"max":33600,"currency":"PLN","period":"month","gross":null,"usd_annual":103716},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"ETL/ELT","optional":false},{"name":"Git","optional":false},{"name":"JavaScript","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Scrum","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-21T10:20:11Z","employer_posted_date":null,"last_verified_at":"2026-10-21T10:20:11Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Unleash scalable solutions — build the future of collaborative platforms!\nKraków-based opportunity with hybrid work model.\nAs a Senior Full Stack Developer, you will be working for our client, a leader in innovative platform solutions for collaboration and data management. You will contribute to the design, development, and maintenance of the cutting-edge CollaborationHub platform, including LakeHouse and WorkSync solutions, empowering teams to connect and innovate seamlessly.\nYour main responsibilities:\nContribute to the platform’s solution design and technical strategy.\nDevelop and maintain backend services and Web APIs in Java.\nBuild dynamic frontend features using JavaScript frameworks (React), HTML, and CSS.\nDesign and optimize PostgreSQL databases, including data models and SQL queries.\nIntegrate services, APIs, and data flows across the platform.\nWrite, execute, and maintain tests; participate in QA, defect investigation, and release validation.\nCollaborate with cross-functional teams to ensure high-quality delivery and continuous improvement.\nYou're ideal for this role if you have:\nAt least 5 years of professional experience in full stack development.\nStrong proficiency in Java, SQL (PostgreSQL), and database design.\nExtensive experience with JavaScript, React, HTML, and CSS.\nHands-on experience with ETL/ELT pipelines.\nSolid understanding of SDLC and version control tools (Git).\nStrong problem-solving skills and meticulous attention to detail.\nGood interpersonal communication skills.\nEnglish language proficiency at B2+ level.\nIt is a strong plus if you have:\nPrior experience in cloud environments or related certifications.\nFamiliarity with Agile methodologies and Scrum.\nLanguage required for the role:\nEnglish (Communicative level).\nEligibility to work on this role:\nOnly candidates with an existing legal right to work in the European Union will be considered for this role.\n#MAKEYourCareerBETTER\nInterested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.\nTech stack\nJava\nReact\nPostgreSQL\nJavaScript\nREST APIs\nETL/ELT pipelines\nHTML/CSS\nGit\nCloud environments\nAgile/Scrum","description_format":"text","description_chars":2216,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-10-21T11:27:00Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":12,"reasons":["seen:0","win:early"],"computed_at":"2026-10-21T20:50:55Z"},"pay":{"stated_usd_annual":103716,"is_top_pay":false},"html_url":"https://alion.io/job/itds-poland-senior-full-stack-javareact-developer-platform-solutions","json_url":"https://alion.io/job/itds-poland-senior-full-stack-javareact-developer-platform-solutions.json","meta":{"generated_at":"2026-10-21T20:50:55Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":29704,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-22T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":879},"rest":"https://alion.io/mcp/rest/get_company?id=879"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fitds-poland-senior-full-stack-javareact-developer-platform-solutions"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fitds-poland-senior-full-stack-javareact-developer-platform-solutions"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fitds-poland-senior-full-stack-javareact-developer-platform-solutions"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/itds-poland-senior-full-stack-javareact-developer-platform-solutions\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fitds-poland-senior-full-stack-javareact-developer-platform-solutions"}]}