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