{"id":2907895,"url":"https://alion.io/job/kleinanzeigen-com-senior-ai-platform-engineer-developer-experience-dfm","title":"Senior AI Platform Engineer – Developer Experience (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":null},"role":"AI/ML","role_family":"AI/ML","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":74000,"max_usd":161000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":16},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"Agile","optional":false},{"name":"AI Agents","optional":false},{"name":"AWS","optional":false},{"name":"AWS Bedrock","optional":false},{"name":"CI/CD","optional":false},{"name":"Function Calling","optional":false},{"name":"Java","optional":false},{"name":"Kotlin","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"LLM Guardrails","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"OpenAI","optional":false},{"name":"Python","optional":false},{"name":"Terraform","optional":false},{"name":"Context Engineering","optional":true},{"name":"Embeddings","optional":true},{"name":"RAG","optional":true},{"name":"Reranking","optional":true}],"status":"live","first_seen_at":"2026-10-20T08:23:30Z","employer_posted_date":"2026-10-20","last_verified_at":"2026-10-23T02:38:37Z","board_verified":true,"closed_at":null,"days_open":2,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":2},"description":"We are looking for a Senior AI Platform Engineer - Developer Experience (d/f/m) to join our Developer Experience team and help shape the shared AI platform capabilities used across engineering at Kleinanzeigen.Kleinanzeigen is Germany’s No. 1 online classifieds platform, reaching more than 36 million users per month. With around 600 colleagues working across product, technology and business functions, we build and operate the technology behind one of Germany’s most widely used digital platforms.\nAs AI becomes an increasingly important part of software development, we want to move beyond individual tools and experiments and provide engineers with reliable, reusable and governed AI capabilities.\nThis role is focused on the platform layer behind AI-enabled engineering: how developers and agents access models, how agents interact with internal tools, how AI workloads are executed, and how these capabilities can be governed and observed at scale.\nYou will work on areas such as AI & MCP gateways, model-provider integrations, agent runtimes, AI observability and evaluations, governance, and developer-facing AI tooling.\nResponsibilities\nDesign and build shared AI platform capabilities that can be used by engineering teams across Kleinanzeigen\nBuild and evolve a unified way for developers, applications and agents to access approved AI models and providers\nDevelop AI Gateway capabilities such as model routing, rate limiting, caching, fallbacks, quotas, usage attribution and cost controls\nEvaluate and integrate new models and model providers and help define how they can be introduced into our engineering ecosystem\nBuild and evolve MCP Gateway capabilities that allow agents to securely discover and interact with internal tools and data\nContribute to agent runtime and secure execution capabilities for AI-powered workflows\nBuild platform mechanisms for identity, authentication, authorization, delegated access, guardrails, data protection and auditing\nDevelop AI observability and evaluation capabilities, including tracing, quality measurement, latency, usage and cost\nBuild APIs, SDKs, CLIs, templates and golden paths that make AI capabilities easy for engineering teams to adopt\nContribute to reusable developer AI workflows and the discovery of approved models, tools and agent capabilities\nCollaborate with Developer Experience, AI Enablement, Release Engineering, DevOps and product engineering teams to identify gaps, avoid duplicated solutions and evolve a coherent AI platform\nParticipate in agile ceremonies and contribute to shaping the team's ways of working, including optimizing the way we work with AI\nRequirements\n Your profile\nYou have hands-on experience building or operating AI platform capabilities used by multiple teams or applications\nYou have experience with LLM gateways or model abstraction layers, including concepts such as provider routing, fallbacks, rate limiting, caching, quotas or cost controls\nYou have practical experience with AI agent development frameworks, tool calling and agentic workflows\nYou have experience with MCP or similar approaches for connecting agents to tools, APIs and internal data\nYou understand how to evaluate and observe LLM-powered systems, including tracing, quality evaluation, latency, usage and cost\nYou have worked with model providers or platforms such as AWS Bedrock, OpenAI or comparable services\nYou understand platform concerns around identity, authentication, authorization, guardrails, data protection and auditing\nYou have strong software engineering fundamentals and hands-on experience building backend or platform services\nYou are proficient in at least one programming language such as Java, Kotlin or Python\nYou are comfortable designing and building APIs, integrations and distributed services\nYou have experience with cloud infrastructure, ideally AWS, and understand concepts such as containers, networking, identity and service-to-service communication\nYou are familiar with modern infrastructure and delivery practices such as Kubernetes, Terraform and CI/CD\nYou are comfortable working in an area where technologies and patterns are still evolving and can make pragmatic technical decisions under uncertainty\nStrong communication skills in English. German is a plus\nNice-to-have:Experience with agent runtimes or secure sandbox environments\nExperience with context engineering, RAG, embeddings, retrieval or reranking\nExperience building AI SDKs, CLIs, templates or developer workflows\nExperience with internal developer platforms or developer tooling\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":5780,"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":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Flexible schedule","Life insurance","Parental leave"],"hiring_locations":[{"name":"Germany","iso":"DE","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Internet Services","Marketplaces","Online Classifieds"],"lifecycle":[{"event":"open","at":"2026-10-20T08:32:34Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":2,"expected_fill_days":55,"reasons":["conf:3","velocity","win:early","comp:attention"],"computed_at":"2026-10-23T05:54:15Z"},"pay":null,"html_url":"https://alion.io/job/kleinanzeigen-com-senior-ai-platform-engineer-developer-experience-dfm","json_url":"https://alion.io/job/kleinanzeigen-com-senior-ai-platform-engineer-developer-experience-dfm.json","meta":{"generated_at":"2026-10-23T06:39:55Z","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":10866,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-24T00:00:00Z"}},"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-senior-ai-platform-engineer-developer-experience-dfm"},{"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-senior-ai-platform-engineer-developer-experience-dfm"},{"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-senior-ai-platform-engineer-developer-experience-dfm"},{"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-senior-ai-platform-engineer-developer-experience-dfm\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkleinanzeigen-com-senior-ai-platform-engineer-developer-experience-dfm"}]}