{"id":3537998,"url":"https://alion.io/job/sii-senior-kotlin-developer-fmx","title":"Senior Kotlin 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":"Mobile","role_family":"Mobile","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":["Poznań, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":57000,"max_usd":106000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":30},"experience_years_min":3,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"Java","optional":true},{"name":"JavaScript","optional":true},{"name":"React.js","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-10-30T09:37:40Z","employer_posted_date":"2026-10-30","last_verified_at":"2026-11-02T05:10:43Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"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\nKotlin\n\nAWS\n\nApache Kafka\n\nKubernetes\n\nMikrousługi\n\nMile widziane\nReact\nTypeScript\nSzukamy doświadczonego Senior Kotlin Developer (f/m/x), który dołączy do zespołu pracującego nad nowoczesną i złożoną platformą oprogramowania. Będziesz koncentrować się na rozwijaniu skalowalnych rozwiązań backendowych i mikroserwisów, wdrażaniu nowych funkcjonalności oraz integrowaniu platformy z systemami zewnętrznymi. Będziesz miał również możliwość wpływania na decyzje techniczne oraz poprawy wydajności, niezawodności i ogólnej jakości rozwiązania.\nTwoje zadania\nProjektowanie, rozwijanie i ulepszanie skalowalnych usług backendowych przy użyciu Kotlin\nŚcisła współpraca z zespołami produktowymi, inżynieryjnymi i innymi, aby dostarczać skuteczne rozwiązania techniczne\nMonitorowanie wydajności aplikacji i identyfikowanie możliwości poprawy skalowalności, stabilności i efektywności\nUdział w przeglądach kodu i dyskusjach technicznych w celu utrzymania wysokich standardów rozwoju\nWsparcie ciągłych ulepszeń w praktykach rozwoju i ogólnej jakości kodu\nDzielenie się wiedzą techniczną i wspieranie innych członków zespołu w ich rozwoju zawodowym\nWymagania\nCo najmniej 3-letnie doświadczenie zawodowe w rozwoju oprogramowania, szczególnie w Java i Kotlin\nSolidne doświadczenie w projektowaniu i rozwijaniu aplikacji opartych na mikroserwisach\nPraktyczna znajomość Kubernetes i środowisk aplikacji kontenerowych\nPraktyczne doświadczenie w pracy z AWS i Apache Kafka\nDobra znajomość zasad wydajności aplikacji, skalowalności i niezawodności\nUmiejętność efektywnej współpracy z programistami i innymi członkami zespołów międzyfunkcyjnych\nJęzyk angielski na poziomie zaawansowanym\nMile widziane\nDoświadczenie z React.js i TypeScript\nNr oferty JOB-EDHLN\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\nKotlin\n\nAWS\n\nApache Kafka\n\nKubernetes\n\nMicroservices\n\nNice to have\nReact.js\nTypeScript\nWe are looking for an experienced Senior Kotlin Developer to join a team working on a modern and complex software platform. You will focus on developing scalable backend solutions and microservices, implementing new functionalities, and integrating the platform with external systems. You will also have the opportunity to contribute to technical decisions and improve the performance, reliability, and overall quality of the solution.\nYour tasks\nDesigning, developing, and enhancing scalable backend services using Kotlin\nWorking closely with product, engineering, and other teams to deliver effective technical solutions\nMonitoring application performance and identifying opportunities to improve scalability, stability, and efficiency\nContributing to code reviews and technical discussions to maintain high development standards\nSupporting continuous improvements in development practices and overall code quality\nSharing technical knowledge and supporting other team members in their professional growth\nRequirements\nAt least 3 years of professional experience in software development, particularly with Java and Kotlin\nSolid experience in designing and developing microservice-based applications\nHands-on knowledge of Kubernetes and containerized application environments\nPractical experience working with AWS and Apache Kafka\nGood understanding of application performance, scalability, and reliability principles\nAbility to collaborate effectively with developers and other cross-functional team members\nAdvanced English skills\nNice to have\nExperience with React.js and TypeScript\nJob no. JOB-EDHLN\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":4195,"description_truncated":false,"requirements":{"experience_years_min":3,"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":"2026-10-30T18:19:11Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":1,"expected_fill_days":27,"reasons":["conf:1","velocity","win:early","comp:brand"],"computed_at":"2026-11-01T06:10:25Z"},"pay":null,"html_url":"https://alion.io/job/sii-senior-kotlin-developer-fmx","json_url":"https://alion.io/job/sii-senior-kotlin-developer-fmx.json","meta":{"generated_at":"2026-11-02T06:08:30Z","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":8830,"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-kotlin-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-kotlin-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-kotlin-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-kotlin-developer-fmx\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsii-senior-kotlin-developer-fmx"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3537998}},{"tool":"search_jobs","arguments":{"company":"sii.pl","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3537998},"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. Docs: https://alion.io/developers"}}