{"id":2117196,"url":"https://alion.io/job/polkomtel-backend-developer-km-kotlinjava-javascripttypescript-linux","title":"Backend Developer (k/m) (Kotlin/Java, JavaScript/TypeScript, Linux)","company":{"id":1681,"name":"Polkomtel","domain":"grupapolsatplus.pl","url":"https://alion.io/company/polkomtel","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":50000,"max_usd":94000,"period":"year","method":"role_country_seniority_unknown","sample_n":872},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Ansible","optional":false},{"name":"BGP","optional":false},{"name":"CI/CD","optional":false},{"name":"Docker","optional":false},{"name":"GitLab","optional":false},{"name":"Hibernate","optional":false},{"name":"JavaScript","optional":false},{"name":"Kotlin","optional":false},{"name":"Linux","optional":false},{"name":"Lua","optional":false},{"name":"Nginx","optional":false},{"name":"OpenResty","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"TypeScript","optional":false},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-10-04T12:00:07Z","employer_posted_date":null,"last_verified_at":"2026-10-04T12:00:07Z","board_verified":false,"closed_at":null,"days_open":9,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":9},"description":"Backend Developer (k/m) (Kotlin/Java, JavaScript/TypeScript, Linux)\n\nPoszukujemy Backend Developera (k/m), który/a dobrze zna Kotlin lub Javę, potrafi pracować z JavaScriptem/TypeScriptem, a także swobodnie porusza się w środowisku Linux. Będziesz rozwijać i utrzymywać aplikacje backendowe w środowisku CDN Polkomtel, pracować z bazą danych PostgreSQL, a także pisać w Lua. \nTo stanowisko jest idealne zarówno dla programisty Kotlin/Java (k/m), który/a zna podstawy JavaScript/TypeScript i nie boi się Linuxa, jak i dla administratora Linuxa (k/m), który/a ma doświadczenie w programowaniu i chce rozwijać się w tym kierunku. \n\nTechnologie, których używamy: \nBackend: Kotlin (lub Java), Spring Boot, Hibernate, PostgreSQL \n\nFrontend: JavaScript / TypeScript \n\nInfrastruktura: Linux, Ansible, Docker, Nginx (Lua / OpenResty) \n\nTesty: Kotlin (testy integracyjne), Locust (testy wydajnościowe w Java) \n\nCI/CD: GitLab \n\nSieci i protokoły: HTTP, HTTP Caching, BGP \n\nMiejsce pracy: Warszawa\nOpis stanowiska:\nRozwój aplikacji backendowych w Kotlinie (lub Javie),\n\nPraca z bazą danych PostgreSQL (proste zapytania, triggery),\n\nUtrzymanie i rozwój integracji z frontendem pisanym w JavaScript/TypeScript,\n\nUdział w testowaniu aplikacji (integracyjne i wydajnościowe),\n\nAdministracja systemem Linux (podstawowa diagnostyka, obsługa sieci, procesy),\n\nPraca z Nginx / OpenResty (umiejętność pisania skryptów Lua),\n\nWspółpraca z zespołem DevOps oraz SysAdmin-ami w zakresie wdrażania aplikacji.\n\nWymagania:\nBardzo dobra znajomość Kotlina lub Javy,\n\nPodstawowa znajomość JavaScript / TypeScript,\n\nUmiejętność pracy z bazami danych SQL (PostgreSQL),\n\nDoświadczenie w pracy na Linuxie (polecenia, procesy, podstawy sieci),\n\nChęć do nauki i pracy z nowymi technologiami (Lua, OpenResty).\n\nMile widziane: \nPodstawowa wiedza o BGP, HTTP oraz HTTP Caching,\n\nZnajomość Spring Boot, Hibernate, Ansible, Docker.\n\nOferujemy:\nPracę na odpowiedzialnym stanowisku w największej grupie kapitałowej w kraju.\n\nSuper atmosferę, przyjazne środowisko pracy, współpracę z osobami otwartymi i chętnie dzielącymi się wiedzą.\n\nStabilne zatrudnienie w ramach umowy o pracę lub umowy B2B.\n\nHybrydowy model pracy.\n\nDostęp do platformy szkoleniowej, gdzie z pewnością znajdziesz coś dla siebie.\n\nPakiet benefitów (karta Multisport, opieka medyczna w LuxMed, ubezpieczenie na życie, liczne oferty pracownicze dedykowane pracownikom Grupy).\n\nDofinansowanie do aktywności organizowanych przez sekcje sportowe i tematyczne, gdzie można rozwijać swoje pasje – bo praca to nie wszystko.\n\nTech stack\nKotlin\nSpring Boot\nHibernate\nPostgreSQL\nLinux","description_format":"text","description_chars":2598,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Telecommunications","Mobile Networks","Streaming & OTT Platforms"],"lifecycle":[{"event":"open","at":"2026-10-08T22:59:03Z"}],"visa":[],"liveness":{"score":75,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.795,"p_room":0.945,"age_days":8,"expected_fill_days":20,"reasons":["seen:8","velocity","win:mid"],"computed_at":"2026-10-13T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/polkomtel-backend-developer-km-kotlinjava-javascripttypescript-linux","json_url":"https://alion.io/job/polkomtel-backend-developer-km-kotlinjava-javascripttypescript-linux.json","meta":{"generated_at":"2026-10-14T02:43:11Z","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 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