Backend Engineer - Python

Your mission

To support our growing team, we are looking for an experienced Backend Engineer - Python to work closely with our engineering and product leadership. In this role, you will take a hands‑on and high‑ownership approach to shaping and building our backend architecture. This includes designing scalable, secure, and high-performance systems, defining robust APIs and data models, and aligning Kubernetes‑based infrastructure with backend services to enable seamless integration between our simulation and inference platforms in a fast‑moving AI‑driven environment.

This role is open to remote/hybrid candidates based in Germany.

• Responsible for shaping the backend architecture - ensuring scalability, security, and performance
• Integrate our simulator and inference products to deliver a seamless end‑to‑end system
• Define and evolve backend patterns, APIs, and data models to support complex simulation workflows
• Collaborate with infrastructure teams to align backend services with Kubernetes‑based environments
• Collaborate closely with frontend, UI/UX, and infrastructure teams to ensure cohesive system design
• Build backend services capable of handling large‑scale, data‑intensive, and latency‑sensitive operations

Your profile

• Strong experience in Python (5+ years) with a focus on backend systems
• Proven experience building scalable, resilient backend architectures in production
• Hands‑on experience with FastAPI
• Solid understanding of distributed systems and system design
• Experience with PostgreSQL and data modeling for high‑throughput systems
• Working knowledge of Kubernetes and containerized environments
• Experience with observability and monitoring tools (e.g. Prometheus)
• Focus on performance and reliability
• Understanding of security best practices, especially for handling sensitive client data

Nice‑to‑have:

• Familiarity with message brokers (e.g. RabbitMQ, Kafka)
• Exposure to frontend technologies (e.g. React) for collaboration purposes
• Experience with advanced web technologies (Websockets, SSE)
• Experience with object storage systems (S3)
• Exposure to AI/ML systems, model serving, or training pipelines

Why us?

• Build something big: Help build and scale a fast‑growing AI infrastructure startup
• Pay & perks: Competitive compensation with a performance‑based incentive, subsidized Deutschlandticket, and access to a discount portal
• Work your way: Flexible hours with hybrid and remote‑friendly* options
• Fast lanes, no red tape: Flat hierarchies and rapid decision‑making mean ideas ship quickly
• Global team: Work with a diverse, international team across Germany and the USA
• Modern headquarters: Well‑stocked office near the Heidelberg Hauptbahnhof, available on a hybrid basis or as a place to connect during our quarterly team workshops
• Top setup: Your choice of high‑quality hardware and equipment