{"id":2114877,"url":"https://alion.io/job/sii-senior-java-developer-fmx","title":"Senior Java Developer (f/m/x)","company":{"id":1387,"name":"Sii","domain":"sii.pl","url":"https://alion.io/company/sii","size_band":"5000+","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Career sitemap","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","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":null,"salary_estimate":{"min_usd":65000,"max_usd":108000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":352},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Python","optional":false},{"name":"Clean Architecture","optional":true},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"LangChain","optional":true},{"name":"LangGraph","optional":true},{"name":"Machine Learning","optional":true},{"name":"NLP","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Prompt Engineering","optional":true},{"name":"Spring Framework","optional":true},{"name":"SQL","optional":true}],"status":"live","first_seen_at":"2026-09-11T08:59:04Z","employer_posted_date":"2026-10-12","last_verified_at":"2026-11-02T09:27:34Z","board_verified":true,"closed_at":null,"days_open":52,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":52},"description":"This translation is generic and may include errors.\nShow original text\n\nThis offer base language is English.\nTranslate into Polish.\nTechnologie i narzędzia\nWymagane\n\nJava\n\nPython\n\nMile widziane\nJavaScript\nSzukamy doświadczonego Full Stack Developera, który dołączy do zespołu naszego klienta w Krakowie. W tej roli będziesz uczestniczyć we wszystkich częściach cyklu życia oprogramowania, w tym analizie, testowaniu i wsparciu produkcyjnym, ściśle współpracując z zespołem liczącym od 4 do 6 osób oraz dedykowanym właścicielem produktu. Jeśli pasjonujesz się rozwojem oprogramowania i lubisz współpracować z innymi w celu projektowania innowacyjnych rozwiązań, ta oferta może być odpowiednia dla Ciebie.\nTwoje zadania\nUczestnictwo we wszystkich fazach cyklu życia oprogramowania, w tym analiza, testowanie i wsparcie produkcyjne\nWspółpraca w zespole w celu przekształcenia wymagań biznesowych w historie i iteracyjne dostarczanie każdej historii do produkcji\nZapewnianie wsparcia produktu jako integralna część roli, zgodnie z zasadą, że zespół buduje i wspiera produkt\nIdentyfikowanie obszarów długu technicznego i zapewnienie zdrowej równowagi między jego rozwiązaniem a dostarczaniem nowych funkcjonalności\nProjektowanie rozwiązań dla nowych elementów zgodnie z wytycznymi i ograniczeniami technologicznymi\nUdział w programowaniu w parach z innymi członkami zespołu w celu zwiększenia współpracy i dzielenia się wiedzą\nWymagania\nMinimum 5-letnie doświadczenie w programowaniu w Java, Spring Framework i Pythonie\nDogłębne zrozumienie kluczowych koncepcji rozwoju oprogramowania, takich jak SOLID, Clean Code, DDD i BDD\nDoświadczenie z bazami danych SQL/NoSQL, w tym PostgreSQL i MongoDB\nZnajomość uczenia maszynowego, NLP, AI lub Data Science jest dodatkowym atutem\nUmiejętność nauczania i współpracy z inżynierami w projektowaniu nowych systemów i rozwiązań\nSkuteczne umiejętności komunikacyjne w języku angielskim w mowie i piśmie\nDoświadczenie w pracy z technologią strumieniowania zdarzeń\nMile widziane\nPoprzednia praca z Prompt Engineering\nZnajomość LangChain i LangGraph\nDoświadczenie w Clean Architecture\nNr oferty JOB-4ZZ48\nSii zapewnia, że wszystkie decyzje związane z zatrudnieniem są podejmowane wyłącznie na podstawie kwalifikacji i kompetencji. Zobowiązujemy się do równego traktowania wszystkich osób, niezależnie od cech chronionych, oraz promowania zróżnicowanego i integracyjnego środowiska pracy.\nTechnologies & tools\nMust have\n\nJava\n\nPython\n\nNice to have\nJavaScript\nWe are looking for an experienced Full Stack Developer to join our client's team in Cracow. In this role, you will participate in all parts of the development life cycle, including analysis, testing, and production support, working closely with a team of 4 to 6 people and a dedicated product owner. If you are passionate about software development and enjoy collaborating with others to design innovative solutions, this opportunity may be the right fit for you.\nYour tasks\nParticipating in all phases of the development life cycle, including analysis, testing, and production support\nCollaborating within a team to take business requirements, break them into stories, and deliver each story iteratively to production\nProviding product support as an integral part of the role, following the principle that the team builds and supports the product\nIdentifying areas of technical debt and ensuring a healthy balance between addressing it and delivering new functionality\nDesigning solutions for new items while adhering to technology guidelines and constraints\nEngaging in pair programming with other team members to enhance collaboration and knowledge sharing\nRequirements\nMinimum 5 years of development experience in Java, Spring Framework and Python\nDeep understanding of key software development concepts such as SOLID, Clean Code, DDD, and BDD\nExperience with SQL/NoSQL databases, including PostgreSQL and MongoDB\nFamiliarity with machine learning, NLP, AI, or Data Science is an advantage\nAbility to teach and collaborate with engineers to design new systems and solutions\nEffective communication skills in written and oral English\nPrior experience with event streaming technology\nNice to have\nPrevious work with Prompt Engineering\nFamiliarity with LangChain and LangGraph\nExperience in Clean Architecture\nJob no. JOB-4ZZ48\nSii zapewnia, że wszystkie decyzje związane z zatrudnieniem są podejmowane wyłącznie na podstawie kwalifikacji i kompetencji. Zobowiązujemy się do równego traktowania wszystkich osób, niezależnie od cech chronionych, oraz promowania zróżnicowanego i integracyjnego środowiska pracy.","description_format":"text","description_chars":4598,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Engineering Services","IT Staffing & Staff Augmentation"],"lifecycle":[{"event":"open","at":"2026-10-08T23:16:07Z"}],"visa":[],"liveness":{"score":26,"band":"fade","label":"Fading","p_open":1,"p_active":0.719,"p_room":0.36,"age_days":51,"expected_fill_days":27,"reasons":["conf:1","velocity","win:tail","crowd:brand"],"computed_at":"2026-11-02T06:13:15Z"},"pay":null,"html_url":"https://alion.io/job/sii-senior-java-developer-fmx","json_url":"https://alion.io/job/sii-senior-java-developer-fmx.json","meta":{"generated_at":"2026-11-02T12:09:51Z","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":16651,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-03T00:00:00Z"}},"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":1387},"rest":"https://alion.io/mcp/rest/get_company?id=1387"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsii-senior-java-developer-fmx"},{"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%2Fsii-senior-java-developer-fmx"},{"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%2Fsii-senior-java-developer-fmx"},{"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/sii-senior-java-developer-fmx\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsii-senior-java-developer-fmx"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":2114877}},{"tool":"search_jobs","arguments":{"company":"sii.pl","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":2114877},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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