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.