Deine Mission About Wallround Wallround is headquartered in Berlin, with additional locations in Hamburg, Frankfurt am Main, Munich, Friedrichshafen and NRW. Our mission: we turn energy-efficient retrofits for multi-family residential buildings into predictable, lucrative investment opportunities. When it comes to modernisations, the real estate market is often a black box of rough estimates and fragmented processes. We are changing that. Through our integrated platform and streamlined workflow, we transform 'brown assets' into future-proof, high-yield properties.<h2 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">About the Role</h2>Department: Prod & Tech Functional Home: AI Reports to: CPO Location: Germany / Europe <span style="border:0px solid;margin:0px;color:rgb(0,0,0);font-family:Arial, sans-serif;font-size:11pt;font-style:normal;font-weight:700;text-transform:none;background-color:transparent;text-decoration:none;">Seniority:<span style="border:0px solid;margin:0px;color:rgb(0,0,0);font-family:Arial, sans-serif;font-size:11pt;font-style:normal;text-transform:none;background-color:transparent;text-decoration:none;font-weight:400;"> Senior We are looking for AI Senior Software Engineers to design and build the technical foundation behind our AI-powered products.You will be part of the AI Functional Home while working primarily within cross-functional product squads. You will collaborate closely with the AI Lead Product Manager, Product Design, Full-Stack and Backend Engineers, and Automation Engineers.This role is ideal for an engineer who enjoys moving between AI experimentation and production software engineering - taking an idea from prototype to reliable, scalable customer-facing functionality.<h2 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">Key Responsibilities</h2><h3 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">AI Engineering</h3><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Design and implement production-grade AI features and services.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Work with LLMs, multimodal models, embeddings, RAG, agents, and AI APIs.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Design AI workflows that are reliable, observable, and maintainable.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Evaluate models and AI approaches against product requirements.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Develop strategies for accuracy, hallucination reduction, latency, and cost optimization.</li></ul><h3 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">Product Development</h3><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Work directly with the AI Product Manager to turn product requirements into technical solutions.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Rapidly prototype new AI capabilities and validate technical feasibility.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Take successful prototypes into production.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Contribute to technical product decisions and architecture.</li></ul><h3 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">AI Infrastructure & Quality</h3><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Build evaluation frameworks and testing approaches for AI systems.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Implement monitoring and observability for AI applications.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Establish appropriate guardrails and fallback mechanisms.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Monitor model performance, latency, availability, and cost.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Help establish reusable AI infrastructure and engineering patterns.</li></ul><h3 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">Cross-Functional Squad Execution</h3><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Act as a senior technical contributor within the AI Product Squad.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Collaborate with Product, Design, Backend, Full-Stack, and Automation specialists.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Break complex AI initiatives into executable technical work.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Mentor other engineers and raise engineering standards across the AI Team.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Participate in architectural and technical decision-making.</li></ul> Dein Profil <h2 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">What We are Looking For</h2><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">6+ years of professional software engineering experience.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Significant experience building production software using TypeScript and/or Java Python.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Hands-on experience building applications with LLMs or other modern AI technologies.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Strong understanding of APIs, distributed systems, databases, and cloud infrastructure(AWS, GCP, or Azure).</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience taking AI prototypes into production.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Strong software engineering fundamentals: testing, version control, code review, observability, and maintainability.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Ability to operate autonomously in a fast-moving product environment.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience with RAG architectures and vector databases.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience building AI agents and tool-calling systems.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience with model evaluation and AI observability.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience with LangChain, LlamaIndex, or equivalent frameworks.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience with multimodal AI.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Experience building B2B SaaS products.</li></ul><h2 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">Success in the First 6–12 Months</h2><ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Deliver production-grade AI capabilities.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Establish reliable AI engineering and evaluation patterns.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Improve the quality, reliability, and cost efficiency of AI features.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Build reusable AI components that accelerate future squads.</li><li style="list-style-type:disc;font-size:11pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Mentor engineers and contribute to the technical direction of the AI Team.</li></ul><h2 style="line-height:1.2;margin-top:8pt;margin-bottom:4pt;">What You’ll Own</h2>AI Architecture → AI Engineering → Production AI Systems → Evaluation → Reliability → Technical Excellence Warum wir? Why Join Wallround?<ul style="margin-top:0;margin-bottom:0;"><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Impact: Shape the future of energy-efficient retrofits and make a real contribution to climate action.</li><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Growth: Be part of a fast-growing startup with huge market potential.</li><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Team & Culture: Work alongside a highly motivated, experienced team in Berlin (Kreuzberg). Enjoy a vibrant startup culture, regular team events, and a modern workplace.</li><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Innovation: Flat hierarchies and fast decision-making—your ideas matter from day one.</li><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Flexibility & Development: Competitive salary, flexible working hours, and tailored personal growth opportunities.</li><li style="list-style-type:disc;font-size:10pt;font-family:Arial, sans-serif;color:#000000;background-color:transparent;font-weight:400;font-style:normal;text-decoration:none;">Perks & Benefits: €150 monthly benefit budget—use it for public transit tickets, meal allowances, or lifestyle perks (e.g., Urban Sports Club membership or vendor vouchers).</li></ul>

AI Senior Software Engineer @ Wallround

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