Senior Python Backend Engineer

Ready to build systems that go beyond simple AI wrappers? Join Synmatch AI's client as a Senior Python Backend Engineer and become a founding member of their engineering team. This Munich-based AI-native commerce platform is redefining digital shopping by building robust multi-agent systems that guide users with real expertise not just API integrations.

Our client is looking for true engineering craftsmanship. You’ll help design and build the core backend architecture powering complex, enterprise-grade buying journeys. This is a greenfield opportunity within an already revenue-generating business, combining startup freedom with financial stability.

You’ll work on scalable, production-ready systems where performance, clarity, and long-term thinking matter. If you care deeply about clean architecture, database performance, and pragmatic engineering decisions that stand the test of time, this role offers real ownership and impact.

What you will do as a Senior Python Backend Engineer...

• Architect Core Systems : Develop scalable components of a multi-agent system using FastAPI, Django, and pydantic-ai
• Design Robust Data Models : Define and optimize domain models and PostgreSQL schemas for high-performance enterprise applications
• Own Technical Decisions : Make pragmatic framework, tooling, and scalability choices from design through production
• Write Clear, Maintainable Code : Build systems the whole team understands and can extend confidently
• Integrate AI Thoughtfully : Connect AI agents into seamless user experiences without over engineering

What we are looking for…

• 3+ years working on a single long-term product, owning architectural decisions over time
• Deep experience building RESTful APIs with FastAPI and/or Django
• Strong PostgreSQL knowledge, including indexing, query optimization, and schema design
• Experience deploying and operating backend systems in cloud environments
• Pragmatic mindset focused on stable, production-grade systems
• Collaborative and team-oriented approach

Benefits and perks…

• Work on a true AI-native multi-agent platform from scratch
• Financial stability combined with greenfield engineering freedomHigh ownership and outcome-driven culture
+
• Strong in-office engineering culture in Munich
+
• Opportunity to grow alongside a detail-oriented, ambitious team