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

Location: Hybrid (Munich-based team, 3 days/week in office); Workload: Full-time; Start: ASAP

About us

Hi, we are Jessy Works – an AI startup rethinking accounting from the ground up.

While accounting firms are struggling to find qualified staff, we build the solution: AI-powered accounting on autopilot .

Our AI assistants handle bookkeeping, routine workflows, and client communication – dramatically expanding the capacity of tax advisory firms.

Now 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.

If you enjoy building stable systems, working close to product and founders, and using AI as a first-class development tool, keep reading.

Tasks

• Build & own production systems across backend, frontend, and application layers
• Design, develop, and operate AI-powered features , including GenAI pipelines and AI inference workloads
• Work end-to-end : from architecture and implementation to go-live, monitoring, and continuous improvement
• Develop primarily in Python and TypeScript , with Java experience as a strong plus
• Ship on AWS Serverless infrastructure , using tools like Terraform and Kubernetes (K8s)
• Own DevOps responsibilities : CI/CD, infrastructure-as-code, observability, and system reliability
• Use AI-assisted coding workflows (e.g. Aider Chat, GitHub Copilot) to move fast without sacrificing quality
• Actively contribute to sprint planning, refinement, and execution
• Identify and resolve impediments independently – you don’t wait for perfect instructions
• Collaborate closely with product, customers, founders, and AI stakeholders to turn ideas into scalable solutions
• Support product launches and live operations , ensuring stability and performance in production

Requirements

• Senior-level experience as a Software Engineer (several years in production environments)
• Strong hands-on expertise in Python (must-have)
• Very good knowledge of TypeScript / JavaScript
• Java experience is a strong plus
• Solid background in AI / GenAI systems , including AI inference
• Experience with AWS (Serverless), Terraform, and Kubernetes (K8s)
• DevOps mindset : you build it, you run it
• Experience building stable, scalable, and maintainable production systems
• At least one full product go-live you were actively involved in
• Experience with product launches and operating live systems
• Strong understanding of backend, frontend, and application architecture
• Comfortable understanding Windows OS session management
• Proven experience in sprint planning, refinement, and agile execution
• Highly self-driven , pragmatic, and solution-oriented
• German language skills at minimum C1 level (spoken & written) -> You will have customer contact

Benefits

• Direct collaboration with the founding team and key decision-makers
• Ownership and real impact on a core AI product
• Modern tech stack, AI-first development culture, and zero legacy baggage
• A product with real customer value in a massive, underserved market
• Hybrid setup with 3 office days per week in Munich
• Competitive compensation and long-term growth opportunities
• Fast learning curve, high trust, and minimal bureaucracy
• And yes – we celebrate wins: pizza & champagne included

How to apply

• Short CV + LinkedIn profile
• 30-minute intro call – mutual fit & expectations
• Final fit call – scope, role, and start date

No cover letter.

No corporate nonsense.

Just honest engineering, real responsibility, and building something that matters.

If you want to help shape the future of AI-powered accounting with a strong founding team – we’d love to hear from you.