Location: London King's Cross (Relocation Supported) - onsite
Salary : Up to £170k base + meaningful equity
We are partnered up with an early-stage, well-funded AI platform company solving complex problems for large, highly regulated enterprises. The product is already live, customers are active, and the company is scaling fast but the engineering team is still growing.
This is a true founding engineering position with real ownership, influence, and long-term upside.
The Role
As a Founding Backend Engineer, youll help architect and build the core backend systems from the ground up. Youll work across system design, data infrastructure, and production reliability, partnering closely with ML, product, and infrastructure teams.
You wont be maintaining legacy systems - youll be shaping the foundations that everything else is built on.
What Youll Be Doing
Designing and building core backend services and APIs in Python
Architecting scalable data pipelines and distributed systems
Productionising ML models in close collaboration with ML engineers
Making early architectural decisions that will scale with the company
Implementing async processing, caching, and event-driven workflows
Setting engineering standards and best practices from day one
What Were Looking For
4+ years backend engineering experience
Strong Python experience (FastAPI, Flask, or Django)
Previous experience in startups or high-growth environments
Comfort working with ambiguity, speed, and limited structure
Strong database knowledge (PostgreSQL, Redis)
Experience with async task queues and message brokers
Cloud experience (Azure, AWS, or GCP)
Builder mindset: ownership, pragmatism, and bias toward action
Why Join
Competitive salary + meaningful equity
Relocation support in London
Direct access to founders and real technical influence
Opportunity to help build a company from early scale to category leader
This role is not about perfect roadmaps or fixed requirements.
Its about building fast, thinking deeply, and owning what you ship.
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