Senior Software Engineer (m/f/d) - AI & Product Engineering

Location: Hybrid (Munich-based team, 3 days/week in office); Workload: Full-time; Start: ASAP\nAbout us\nHi, we are Jessy Works – an AI startup rethinking accounting from the ground up.\nWhile accounting firms are struggling to find qualified staff, we build the solution: AI-powered accounting on autopilot.\nOur AI assistants handle bookkeeping, routine workflows, and client communication – dramatically expanding the capacity of tax advisory firms.\nNow we are looking for a Senior Software Engineer who wants to take real ownership, ship production-ready AI systems, and help scale a mission-critical product.\nIf you enjoy building stable systems, working close to product and founders, and using AI as a first-class development tool, keep reading.\nTasks\n- Build & own production systems across backend, frontend, and application layers\n- Design, develop, and operate AI-powered features, including GenAI pipelines and AI inference workloads\n- Work end-to-end: from architecture and implementation to go-live, monitoring, and continuous improvement\n- Develop primarily in Python and TypeScript, with Java experience as a strong plus\n- Ship on AWS Serverless infrastructure, using tools like Terraform and Kubernetes (K8s)\n- Own DevOps responsibilities: CI/CD, infrastructure-as-code, observability, and system reliability\n- Use AI-assisted coding workflows (e.g. Aider Chat, GitHub Copilot) to move fast without sacrificing quality\n- Actively contribute to sprint planning, refinement, and execution\n- Identify and resolve impediments independently – you don’t wait for perfect instructions\n- Collaborate closely with product, customers, founders, and AI stakeholders to turn ideas into scalable solutions\n- Support product launches and live operations, ensuring stability and performance in production\nRequirements\n- Senior-level experience as a Software Engineer (several years in production environments)\n- Strong hands-on expertise in Python (must-have)\n- Very good knowledge of TypeScript / JavaScript\n- Java experience is a strong plus\n- Solid background in AI / GenAI systems, including AI inference\n- Experience with AWS (Serverless), Terraform, and Kubernetes (K8s)\n- DevOps mindset: you build it, you run it\n- Experience building stable, scalable, and maintainable production systems\n- At least one full product go-live you were actively involved in\n- Experience with product launches and operating live systems\n- Strong understanding of backend, frontend, and application architecture\n- Comfortable understanding Windows OS session management\n- Proven experience in sprint planning, refinement, and agile execution\n- Highly self-driven, pragmatic, and solution-oriented\n- German language skills at minimum C1 level (spoken & written) -> You will have customer contact\nBenefits\n- Direct collaboration with the founding team and key decision-makers\n- Ownership and real impact on a core AI product\n- Modern tech stack, AI-first development culture, and zero legacy baggage\n- A product with real customer value in a massive, underserved market\n- Hybrid setup with 3 office days per week in Munich\n- Competitive compensation and long-term growth opportunities\n- Fast learning curve, high trust, and minimal bureaucracy\n- And yes – we celebrate wins: pizza & champagne included 🍕🍾\nHow to apply\n- Short CV + LinkedIn profile\n- 30-minute intro call – mutual fit & expectations\n- Final fit call – scope, role, and start date\nNo cover letter.\nNo corporate nonsense.\nJust honest engineering, real responsibility, and building something that matters.\nIf you want to help shape the future of AI-powered accounting with a strong founding team – we’d love to hear from you.\nFind more

in Germany (english-speaking-jobs)