{"id":2567425,"url":"https://alion.io/job/kleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract","title":"Senior Backend Engineer (d/f/m) - Fixed Term contract","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":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"contractor","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":115000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":62},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"Flyway","optional":false},{"name":"Java","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Spring Boot","optional":false},{"name":"Testcontainers","optional":false}],"status":"live","first_seen_at":"2026-09-21T13:26:19Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-26T08:16:53Z","board_verified":true,"closed_at":null,"days_open":34,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":34},"description":"Join the Kleinanzeigen Transactions area (TRX) as a Backend Engineer and help shape the transaction experience on Kleinanzeigen. TRX is responsible for the money-related parts of our platform, including experiences such as “Direkt kaufen”, as well as the shipping processes connected to transactions. We integrate and work closely with external partners including our Payment Service Provider and shipping partners.You’ll work hands-on with a modern Java stack, take ownership of services from implementation through production, and solve complex business and technical challenges that directly impact our users.\nThis is a temporary maternity leave replacement until January 2027.\nResponsibilities\nWhat You’ll DoBuild, evolve, and maintain backend microservices using Java 25 and Spring Boot.\nTake end-to-end ownership of your services in production, including triaging alerts and investigating issues using structured logs and metrics.\nDesign and implement event-driven systems with Kafka, including reliable messaging patterns such as the outbox pattern.\nModel complex business workflows around transactions, payments, shipping, and integrations with external partners.\nWork with PostgreSQL and Flyway to design, evolve, and maintain reliable data models and database migrations.\nEnsure high software quality through comprehensive unit and integration testing, including Testcontainers, while using AI tools thoughtfully to improve your engineering workflow.\nRequirements\n Who You AreYou have solid professional experience in backend software engineering with Java and Spring Boot and are comfortable owning production services.\nYou have hands-on experience with event-driven architectures and Kafka and understand patterns for building reliable distributed systems.\nYou are confident working with PostgreSQL, database migrations, automated testing, and modern engineering practices.\nYou approach complex problems systematically, using observability, logs, metrics, and testing to understand issues and develop sustainable solutions.\nYou actively explore and use AI-supported engineering tools and practices to improve development, problem-solving, and software quality.\nBenefits\n Your benefits at Kleinanzeigen At 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. We welcome people of all backgrounds, races, religions, colours, national origins, gender identities, sexual orientation, ages, marital status, or disability.\nIf this role sparks your interest but you’re not sure you meet every single requirement, we’d still love to hear from you anyway.","description_format":"text","description_chars":3395,"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":["Flexible schedule","Life insurance","Parental leave"],"hiring_locations":[{"name":"Germany","iso":"DE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-14T22:14:01Z"}],"visa":[],"liveness":{"score":62,"band":"ok","label":"Likely open","p_open":1,"p_active":0.824,"p_room":0.75,"age_days":34,"expected_fill_days":48,"reasons":["conf:2","velocity","win:late"],"computed_at":"2026-10-26T05:57:25Z"},"pay":null,"html_url":"https://alion.io/job/kleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract","json_url":"https://alion.io/job/kleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract.json","meta":{"generated_at":"2026-10-26T12:00:50Z","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":16368,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"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":2949074},"rest":"https://alion.io/mcp/rest/get_company?id=2949074"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fkleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract"},{"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%2Fkleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract"},{"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%2Fkleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract"},{"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/kleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkleinanzeigen-senior-backend-engineer-dfm-fixed-term-contract"}]}