Back End Developer in City of London

Role: Senior Python Backend Engineer

Location: London King's Cross – full time on site

Salary: up to £200k base + equity

We are partnered with a high-growth AI-driven platform that helps large enterprises automate complex, data-heavy workflows. The company is well-funded with. over $90M from top VC's, scaling rapidly, and already working with globally recognised organisations in a highly regulated environment.

The Role

As a Senior Backend Engineer, you’ll help design and scale the backend systems behind a sophisticated AI platform. You’ll work on high-performance services, complex data pipelines, and secure infrastructure, collaborating closely with ML, product, and platform teams.

This is a hands-on senior role with real influence over architecture, technical decisions, and engineering standards as the company continues to scale.

What You’ll Be Doing

• Building and scaling backend services and APIs in Python
• Designing and optimising data pipelines and databases
• Working closely with ML engineers to deploy models into production
• Implementing async processing, caching, and event-driven systems
• Ensuring security, reliability, and compliance in production systems
• Improving performance, scalability, and system resilience

The ideal candidate will:

• 5+ years of backend engineering experience
• Strong Python experience (FastAPI, Flask, or Django)
• Have experience working at a previous startup/scale up
• Solid knowledge of PostgreSQL and Redis
• Experience with async task queues and message brokers
• Cloud experience (Azure, AWS, or GCP)
• Strong understanding of distributed systems and security best practices

Why Join

• Competitive salary + equity
• Direct exposure to founding team
• Opportunity to build a category-defining AI platform

Fast-moving, demanding, and high-impact – this role is for engineers who enjoy building serious systems in evolving environments.