{"id":2567426,"url":"https://alion.io/job/kleinanzeigen-senior-full-stack-engineer-dfm","title":"Senior Full Stack Engineer (d/f/m)","company":{"id":2949074,"name":"Kleinanzeigen.com","domain":"kleinanzeigen.com","url":"https://alion.io/company/kleinanzeigen-com","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":true,"listed_via":null,"ats_vendor":"HiBob","truth_index":{"grade":"B","score":75,"open_postings":3,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-15T05:46:00Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Berlin, Germany"],"countries":["DE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":65000,"max_usd":113000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":60},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Astro","optional":false},{"name":"DynamoDB","optional":false},{"name":"JavaScript","optional":false},{"name":"Kotlin","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"CI/CD","optional":true},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-09-11T08:10:05Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-15T06:14:34Z","board_verified":true,"closed_at":null,"days_open":34,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":34},"description":"This is a hybrid role, and our office is based in Berlin Charlottenburg.\nResponsibilities\nThis roleFull-stack feature development: Design and implement end-to-end features across our Spring Boot backend services and Astro/React frontend applications, ensuring scalability, performance, and maintainability \nGrowth experimentation: Build and iterate on conversion-focused features, A/B testing infrastructure, and data-driven optimizations that directly impact our subscriber growth metrics \nSystem design and architecture: Shape technical solutions for complex growth features, making informed decisions about API design, data modeling, and integration patterns while considering security, cost, and long-term maintainability \nCross-functional collaboration: Partner closely with Product, Business Development, and Data teams to translate growth hypotheses into technical solutions, communicating trade-offs clearly and driving alignment \nTechnical excellence and mentoring: Establish testing standards, monitoring practices, and quality benchmarks for growth initiatives. Share knowledge and mentor team members in full-stack development practices \nRequirements\n Your profile \n5+ years of professional software development experience \nProven track record of AI-supported delivery in backend and frontend \nExperience working in cross-functional product teams, ideally in growth, e-commerce, or B2B platforms \nSolid backend experience with Java/Kotlin and Spring Boot ecosystem, building RESTful APIs and working with relational databases (PostgreSQL & DynamoDB) \nStrong experience with modern JavaScript/TypeScript, React, and contemporary frontend tooling. Familiarity with Astro, TailwindCSS, or similar frameworks is a plus \nSystem thinking: Understanding of microservices architecture, API design principles, and distributed system patterns \nDevOps awareness: Experience with CI/CD pipelines, observability tools (monitoring, logging, metrics), and cloud infrastructure basicsWays of Working:\nProduct mindset: You connect technical decisions to business outcomes, understand how to balance speed with quality, and can identify systemic risks in growth-focused development\n\nCommunication: You explain technical trade-offs clearly to non-technical stakeholders and foster alignment across teams and functions\n\nOwnership: You take responsibility for your systems' long-term health, considering dependencies, costs, and maintainability in your decision-making\n\nGrowth mindset: You seek feedback proactively, stay current with emerging technologies (especially AI-assisted development tools), and contribute to team learning\n\nBenefits\nAt Kleinanzeigen, we care about our people - their wellbeing, growth, and life beyond work. Our benefits are designed to support you holistically, giving you flexibility and opportunities to thrive.\nFlexibility\nFlexible working time (hybrid)\n\n20 days “work from anywhere”\n\nPaid additional parental leave for both parents\n\nExtra paid days off for special occasions (e.g. your wedding or a move)\n\nWellbeing & Support\nConfidential support & coaching for you and your loved ones\n\nAnnual company sports events\n\nPension and life insurance\n\nGrowth & Development\nPersonal development budget\n\nLearning opportunities to grow your skills and career\n\nPerks &Everyday benefits\nCorporate benefits and exclusive discounts\n\nAn attractive referral program\n\nTransportation allowance\n\nFree shipping on Kleinanzeigen Direktkauf\n\nKleinanzeigen is an equal opportunity employer that values diversity and inclusion. 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