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.\n