{"id":3150845,"url":"https://alion.io/job/kleinanzeigen-com-full-stack-engineer","title":"Full Stack Engineer","company":{"id":2949074,"name":"Kleinanzeigen","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":null,"employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":44000,"max_usd":115000,"period":"year","method":"role_country_seniority_unknown","sample_n":100},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Apache Kafka","optional":false},{"name":"AWS","optional":false},{"name":"CI/CD","optional":false},{"name":"CloudFormation","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"Kubernetes","optional":false},{"name":"Next.js","optional":false},{"name":"Playwright","optional":false},{"name":"Python","optional":false},{"name":"React.js","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"Vitest","optional":false},{"name":"JavaScript","optional":true}],"status":"live","first_seen_at":"2026-10-23T08:54:02Z","employer_posted_date":"2026-10-23","last_verified_at":"2026-10-29T18:40:17Z","board_verified":true,"closed_at":null,"days_open":6,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":6},"description":"Kleinanzeigen reaches 36M+ monthly users and is Germany’s leading online classifieds market. We are a sustainability-focused platform where you won't just write code; you will power the services that bridge our high-traffic backend with seamless user experiences.Joining the Edge team means working on the bedrock of Kleinanzeigen, dealing with high-throughput, low-latency and highly-efficient services that require a 'you build it, you run it' mindset, offering you deep exposure to modern infrastructure and platform architecture.\nResponsibilities\nWho You AreArchitectural Mindset: You have proven experience building systems at scale (load balancing, service discovery, dynamic routing, circuit breakers). You understand not just how to build features, but how they perform under load.\nOwner’s Mentality: You seek out challenges, take the lead on troubleshooting complex production issues, and are proactive in proposing long-term technical solutions.\nTechnical Mentor: You elevate the engineers around you through thoughtful code reviews, collaborative pair programming, and a commitment to sharing best practices.\nEffective Communicator: You can navigate trade-offs between speed and technical debt and explain your decisions clearly to the wider team.\nTech Stack: You have strong experience in Java/Go, and you are comfortable balancing that deep backend work with frontend execution using React/TypeScript.\nRequirements\nWhat You’ll OwnAs a Backend-Heavy Full Stack Engineer, you’ll be a central driver for the services that power user privacy and media delivery at scale. You will own the full development lifecycle: from design and implementation to deployment and maintenance. Your impact will include:\nCore Systems Architecture: Designing and scaling critical microservices using mostly Java and Spring Boot that support 36M+ monthly users.\nFull Lifecycle Responsibility: Applying \"build it, run it\" mentality-you aren't just writing code; you’re ensuring robustness, scalability, and observability in production.\nEnd-to-End Delivery: Crafting seamless user experiences by integrating our robust backend APIs with high-quality, maintainable frontends in TypeScript and React.\nStrategic Engineering: Driving improvements in our development practices, testing standards, and CI/CD pipelines to keep our team velocity high and our systems healthy. For frontend components, you will maintain high standards using tools like Vitest and Playwright.\nOur Tech ToolboxWe believe in picking the right tool for the job. Our core environment is built on modern technologies, including:\nBackend: Java, Spring Boot, Golang, python\nFrontend: NextJs, React, TypeScript\nInfrastructure & Messaging: AWS, Kafka, CloudFormation, Kubernetes\nWe value technology-agnostic engineers who are comfortable navigating this stack and are open to learning new technologies as our systems evolve.How We Work\nAutonomy: We operate in a highly autonomous, cross-functional environment where teams own their services end-to-end.\nMethodology: We follow Agile methodologies with a focus on code quality, pair programming, and CI/CD best practices.\nBalance: We work in a hybrid configuration that values flexibility, deep focus time, and collaborative problem-solving.\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.Flexibility\n26 business days of paid annual holidays\n20 days “work from anywhere”\nFlexible working time (hybrid)\nPaid additional parental leave for both parents\nExtra paid days off for special occasions (e.g. your wedding or a move)\n Wellbeing & SupportPrivate health insurance\nGym Pass (may cover up to 70% of gym membership fees) \n40€ per month as a remote working allowance. \n Growth & DevelopmentPersonal development budget\nLearning opportunities to grow your skills and career\nA unique position in an international and dynamic environment\nA flat, collaborative culture where your feedback actively shapes our processes\n Perks & Everyday BenefitsCompetitive compensation package (Base salary + annual bonus)\nFlexible Remuneration Program (tax-efficient options for transport, restaurant vouchers and childcare)\nCorporate benefits and exclusive discounts\nAn attractive referral program\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 status.If 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":4716,"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","Gym membership","Health insurance","Parental leave"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Internet Services","Marketplaces","Online Classifieds"],"lifecycle":[{"event":"open","at":"2026-10-23T12:16:35Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":5,"expected_fill_days":48,"reasons":["conf:0","velocity","win:early"],"computed_at":"2026-10-29T05:49:05Z"},"pay":null,"html_url":"https://alion.io/job/kleinanzeigen-com-full-stack-engineer","json_url":"https://alion.io/job/kleinanzeigen-com-full-stack-engineer.json","meta":{"generated_at":"2026-10-29T21:38:46Z","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":32079,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"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-com-full-stack-engineer"},{"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-com-full-stack-engineer"},{"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-com-full-stack-engineer"},{"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-com-full-stack-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkleinanzeigen-com-full-stack-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3150845}},{"tool":"search_jobs","arguments":{"company":"kleinanzeigen.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3150845},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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