{"id":2115913,"url":"https://alion.io/job/gs-services-frontend-engineer-react-next-js","title":"Frontend Engineer | React + Next.js","company":{"id":2595,"name":"GS Services","domain":"gsservices.pl","url":"https://alion.io/company/gs-services","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Frontend","role_family":"Frontend","seniority":"senior","employment_type":"contractor","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":59000,"max_usd":101000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":38},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"LLM","optional":false},{"name":"Next.js","optional":false},{"name":"React.js","optional":false},{"name":"Highcharts","optional":true},{"name":"JavaScript","optional":true},{"name":"Node JS","optional":true},{"name":"RAG","optional":true}],"status":"live","first_seen_at":"2026-10-08T15:05:09Z","employer_posted_date":null,"last_verified_at":"2026-10-08T15:05:09Z","board_verified":false,"closed_at":null,"days_open":5,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":5},"description":"Dla naszego klienta poszukujemy Senior Frontend Engineera, który będzie rozwijał kluczowe doświadczenia użytkownika dla produktów wykorzystujących agentic AI.\nSzukamy osoby bardzo mocnej technicznie, z dobrym wyczuciem UI i UX, która potrafi upraszczać złożone doświadczenia produktowe i brać odpowiedzialność za frontend od architektury po jakość rozwiązania na produkcji.\n📍 Lokalizacja: Warszawa\n💼 Tryb pracy: Hybrydowy (3-4 dni z biura)\n🎓 Poziom: Senior\nWymagania:\nMinimum 5 lat doświadczenia we frontend engineeringu\n\nMinimum 3 lata doświadczenia z React i nowoczesnym TypeScriptem\n\nBardzo dobra znajomość Next.js i doświadczenie z aplikacjami SSR\n\nZnajomość App Router, Server Components oraz różnic między SSR, SSG i CSR\n\nDoświadczenie ze złożonym state managementem, np. real-time collaboration, optimistic updates, multi-tenant isolation i large-scale data sync\n\nDoświadczenie w budowie interfejsów AI/LLM, np. chat UI, streaming responses lub semantic search\n\nDoświadczenie w optymalizacji wydajności i pracy z Core Web Vitals\n\nDoświadczenie z aplikacjami enterprise, w tym accessibility, localization, security i compliance\n\nDobre wyczucie produktu i jakości UI\n\nDoświadczenie w codziennej pracy z narzędziami i agentami AI\n\nBardzo dobra komunikacja i umiejętność uzasadniania decyzji technicznych\n\nMile widziane:\nReact Flow, Highcharts lub inne biblioteki do wizualizacji danych\n\nDoświadczenie z vector search UI, RAG interfaces lub generative UI\n\nZnajomość Node.js lub Pythona\n\nDoświadczenie w tworzeniu design systemów lub bibliotek komponentów open source\n\nZakres roli:\nProjektowanie i rozwój produkcyjnych aplikacji Next.js SSR\n\nBudowa interfejsów dla funkcji AI i LLM\n\nRozwój bibliotek komponentów i design systemu\n\nDbanie o reużywalność, accessibility, spójność UX i jakość rozwiązania\n\nMonitorowanie i optymalizacja wydajności aplikacji na produkcji\n\nDbanie o jakość kodu, testy, code review i dobre praktyki frontendowe\n\nZe względu na liczbę otrzymywanych aplikacji nie zawsze mamy możliwość skontaktowania się z każdą osobą. Do dalszego etapu rekrutacji zaprosimy wybranych kandydatów.\nTech stack\nFrontend engineering\nReact\nTypeScript\nNext.js\nSSR\nState Management\nAI interfaces\nPerformance optimization\nReact Flow\nHighcharts","description_format":"text","description_chars":2244,"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":["Professional Services","Human Resources"],"lifecycle":[{"event":"open","at":"2026-10-08T22:59:03Z"}],"visa":[],"liveness":{"score":89,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.894,"p_room":1,"age_days":4,"expected_fill_days":22,"reasons":["seen:4","velocity","win:early"],"computed_at":"2026-10-13T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/gs-services-frontend-engineer-react-next-js","json_url":"https://alion.io/job/gs-services-frontend-engineer-react-next-js.json","meta":{"generated_at":"2026-10-13T22:34:55Z","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":34422,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-14T00:00:00Z"}},"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":2595},"rest":"https://alion.io/mcp/rest/get_company?id=2595"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fgs-services-frontend-engineer-react-next-js"},{"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%2Fgs-services-frontend-engineer-react-next-js"},{"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%2Fgs-services-frontend-engineer-react-next-js"},{"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/gs-services-frontend-engineer-react-next-js\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fgs-services-frontend-engineer-react-next-js"}]}