{"id":2644037,"url":"https://alion.io/job/protofy-senior-fullstack-engineer-wmd","title":"Senior Fullstack Engineer (w/m/d)","company":{"id":4429422,"name":"Protofy","domain":"protofy.com","url":"https://alion.io/company/protofy-3","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":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"inferred_company_offices","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Berlin, Germany"],"countries":["DE"],"hiring_countries":["DE"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":66000,"max_usd":131000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":18},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Docker","optional":false},{"name":"Flutter","optional":false},{"name":"GCP","optional":false},{"name":"GitHub","optional":false},{"name":"GraphQL","optional":false},{"name":"JavaScript","optional":false},{"name":"JUnit","optional":false},{"name":"Kotest","optional":false},{"name":"Kotlin","optional":false},{"name":"Kotlin Multiplatform","optional":false},{"name":"Kubernetes","optional":false},{"name":"MockK","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React Native","optional":false},{"name":"Rest API","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"Terraform","optional":false},{"name":"TypeScript","optional":false},{"name":"Dart","optional":true},{"name":"Java","optional":true},{"name":"React.js","optional":true}],"status":"live","first_seen_at":"2026-10-15T13:31:12Z","employer_posted_date":null,"last_verified_at":"2026-10-15T13:31:12Z","board_verified":false,"closed_at":null,"days_open":0,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":0},"description":"Aktuell suchen wir einen erfahrenen Senior Fullstack Engineer (w/m/d). Du bringst 5+ Jahre Erfahrung in der Backend- und Web-Entwicklung mit und hast Lust auf spannende Aufgaben und Herausforderungen? Let’s talk!\nDeine Rolle\nDu baust robuste Services und APIs in Kotlin, Java oder TypeScript und bringst sie in unsere Web-Apps, gern auch bis in die Infrastruktur.\nDu konzipierst, entwickelst und testest neue Backend-Services und Features im engen Austausch mit Deinen Kolleg*innen aus Frontend und Backend. Dabei gestaltest Du Datenmodelle, Schnittstellen und Integrationen mit Drittsystemen.\nDu sorgst für Performance, Skalierbarkeit und Sicherheit unserer Web-Plattformen und Services. Mit unseren Kunden arbeitest Du direkt an der technischen und inhaltlichen Ausgestaltung.\nDeine typische Woche\nDu konzipierst, entwickelst und testest neue Features, von der API bis zur Oberfläche\n\nDu programmierst im Backend in Kotlin, Java oder TypeScript (Node.js) und im Frontend in TypeScript (React)\n\nDu designst Datenmodelle, Schnittstellen und Integrationen mit Drittsystemen und verbindest sie sauber mit dem Frontend\n\nDu löst Bugs und verbesserst Performance, Skalierbarkeit und Sicherheit unserer Web-Anwendungen und Services\n\nJe nach Projekt wirkst Du an Cloud-Infrastruktur, CI/CD-Pipelines und Deployment mit\n\nDu setzt in Deiner täglichen Arbeit Agentic-Engineering-Tools wie Cursor oder Claude Code ein\n\nDu arbeitest direkt mit unseren Kunden zusammen, in der Regel remote\n\nDu unterstützt Deine Teamkolleg*innen und teilst Learnings und Best Practices Protofy-weit\n\nDu beteiligst Dich aktiv an der fachlichen Weiterentwicklung der Organisation\n\nDu verfolgst neue Trends in Backend, Web und App und diskutierst ihren Einsatz\n\nDein Profil\nDu hast 5+ Jahre Erfahrung in der Softwareentwicklung, sowohl im Backend als auch in der Web-Entwicklung\n\nDu hast Erfahrung in der Backend-Entwicklung mit Kotlin, Java oder TypeScript (z. B. Node.js) sowie im Design und Betrieb von APIs (REST und/oder GraphQL)\n\nDu hast Erfahrung in der Frontend-Entwicklung mit React, Flutter und TypeScript\n\nDu hast fundiertes Web-Know-how (HTTP, HTML, CSS, TypeScript/JavaScript) und verstehst das Zusammenspiel von Frontend und Backend\n\nDu hast Erfahrung im Design und Einsatz von SQL- und/oder NoSQL-Datenbanken (z. B. PostgreSQL, MongoDB)\n\nDu sprichst verhandlungssicher Deutsch und Englisch\n\nBonus\nAkademischer Hintergrund in Informatik, Wirtschaftsinformatik oder einem anderen relevanten Studiengang (BSc, MSc)\n\nErfahrung mit Kotlin, z. B. mit Spring Boot (unsere bevorzugte Wahl)\n\nErfahrung in der Frontend-Entwicklung mit React und TypeScript\n\nAktiver Einsatz von Agentic-Engineering-Tools wie Claude Code, Cursor oder GitHub Copilot\n\nErfahrung mit automatisierten Unit- und Integrationstests (z. B. JUnit, Kotest, MockK) und Prinzipien der Code-Qualität wie TDD, Code Reviews, KISS oder Separation of Concerns\n\nErfahrung mit Cloud-Plattformen (AWS, GCP oder Azure), Docker/Kubernetes, Infrastructure as Code (z. B. Terraform), CI/CD sowie Monitoring und Observability\n\nErfahrung in der App-Entwicklung (z. B. Android/Kotlin, Kotlin Multiplatform, Flutter oder React Native)\n\nErfahrung im Agentur- oder Start-up-Umfeld und mit agilen Methoden wie Pair oder Mob Programming\n\nFind more English Speaking Jobs in Germany on Arbeitnow","description_format":"text","description_chars":3314,"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":[]},"benefits":[],"hiring_locations":[{"name":"Germany","iso":"DE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-15T19:33:10Z"}],"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":29,"reasons":["seen:0","win:early"],"computed_at":"2026-10-16T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/protofy-senior-fullstack-engineer-wmd","json_url":"https://alion.io/job/protofy-senior-fullstack-engineer-wmd.json","meta":{"generated_at":"2026-10-16T08:27:01Z","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":6361,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-17T00:00:00Z"}},"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":4429422},"rest":"https://alion.io/mcp/rest/get_company?id=4429422"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fprotofy-senior-fullstack-engineer-wmd"},{"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%2Fprotofy-senior-fullstack-engineer-wmd"},{"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%2Fprotofy-senior-fullstack-engineer-wmd"},{"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/protofy-senior-fullstack-engineer-wmd\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fprotofy-senior-fullstack-engineer-wmd"}]}