Onsite AI Engineer (Rust/TS) - End-to-End, Hoxton, London

Dex; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Dex is seeking a senior engineer to join a small, high-caliber team in Hoxton, London, to build an AI-enabled coding assistant and power a new AI operating system for strategic decisions. You will own features end-to-end—from Rust services to backend and frontend—shipping high-quality code with the latest AI tools.

Expect deep technical challenges, performance optimization, and infrastructure improvements as you work in person five days a week at our Hoxton office.

Qualifications

• Proven track record delivering features end-to-end across the stack.
• Experience with Rust, TypeScript and React in production systems.
• Strong emphasis on performance optimization and scalable infrastructure.

Responsibilities

• Ship high-quality code using AI tooling and models.
• Own features end-to-end from Rust services to backend and frontend.
• Optimize for performance, including query tuning and CI improvements.
• Refine AI agent harness, tools and context to improve intelligence.

Skills

Top-tier engineer

AI for coding

End-to-end ownership

Performance optimization

Rust

TypeScript

React

Backend development

Frontend development

Tools

Claude Code

Cursor

Job description

Dex is seeking a senior engineer to join a small, high-caliber team in Hoxton, London, to build an AI-enabled coding assistant and power a new AI operating system for strategic decisions. You will own features end-to-end—from Rust services to backend and frontend—shipping high-quality code with the latest AI tools.

Expect deep technical challenges, performance optimization, and infrastructure improvements as you work in person five days a week at our Hoxton office.