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Backend Software Engineer – Python / FastAPI / Event Driven Architecture
Location: London, UK (Hybrid)
Type: Full-time
Level: Mid to Senior
Salary: £70,000 to £100,000
About the Role:
This startup is building a cutting-edge platform to transform how engineers design physical products. Instead of creating one solution at a time, this system enables users to generate, visualise, and explore thousands of design alternatives. Faster and more intelligently than ever before.
This company is a spin-out from one of the UK’s most successful startups, built by top-tier engineers and developers from industry leading teams. We’re looking for a software engineer who enjoys writing clean, functional code and is genuinely passionate about real-world engineering not just building software, but helping change how things are designed and built.
Tech Stack within the engineering environment:
- Backend: Python, FastAPI, Pydantic, PostgreSQL, Docker
- Infrastructure: GitHub Actions, GCP, Kubernetes (optional)
- Paradigms: event-driven architecture
Responsibilities
- Build and maintain backend services using FastAPI and Python for geometry, simulation, and data workflows
- Work closely with domain experts (engineers, designers) to translate complex physical problems into usable software features
- Follow functional programming practices to write testable, composable code
- Own features from idea to implementation to deployment
- Contribute to architectural decisions in a fast-moving, early-stage product
Requirements
- Bachelor’s degree in Computer Science, Engineering, Physics, Mathematics, or a related technical field
- 2+ years of experience building web applications in a production environment
- Strong experience with Python and API frameworks (FastAPI, Flask, etc.)
- Comfort or interest in functional programming principles and clean code architecture
- A genuine interest in engineering and the physical world
- Ability to thrive in a startup or agile environment with autonomy and ownership
Backend Software Engineer – Python / FastAPI / Event Driven Architecture
Key Skills
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