Senior Software Engineer

Senior Software Engineer / Full Stack Developer

London (Hybrid - 2 days p/w)

£100,000+ base + bonus

Our client is fast-growing seed-stage startup reinventing construction with AI. Founded 3 years ago, already up to 20 heads, with aggressive hiring plans.

They're looking for a Senior Software Engineer who can own systems end-to-end from backend services and data models through to infrastructure, deployment and production reliability.

This is a high-ownership role in a small, fast-moving team where you’ll help shape both the product and the engineering foundations.

What you’ll do

• Build and scale backend systems (Python, FastAPI, microservices)
• Design and maintain data models and services (PostgreSQL, graph-based workflows where appropriate)
• Own production infrastructure, deployment and reliability (AWS, CI/CD, observability)
• Build and integrate AI/LLM-powered features into real workflows
• Work closely with founders to translate product ideas into production systems

What we’re looking for

• 3-5+ years of software engineering experience
• Strong backend engineering skills in Python (or similar)
• Proven experience owning production systems (deployment, scaling, monitoring)
• Comfortable working across backend + infrastructure
• Experience or strong interest in building AI/LLM-powered applications
• Practical experience with cloud & devops environments (AWS preferred)

Why join

• Real ownership of production systems used in the real world
• Work on cutting-edge AI applied to a large, complex industry
• Small, high-trust team with rapid iteration cycles & rapid career progression

Please click apply if you'd like a confidential conversation!