Lead Front-End Architect: AI-Powered Finance UI

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

Job summary

Dex is building AI agents to automate complex financial workflows and deliver client-ready documents at unprecedented speed. As Lead Front-End Engineer, you will own the front-end craft across the product, defining patterns and guidelines that all engineers follow, including agentic tooling interfaces.

You will set the rules for how AI agents interact with the UI, ensuring quality scales with a rapidly growing platform. This is a rare opportunity to shape how, not just what, we build.

Qualifications

• Deep front-end fundamentals and understanding of what happens under the hood.
• Proven experience with multiple front-end frameworks and their trade-offs.
• Strong performance engineering instincts and bottleneck diagnosis skills.
• Exceptional architecture and systems design judgment for scalable front-end apps.
• Expert-level TypeScript experience.

Responsibilities

• Define and evangelize front-end architectural patterns and best practices across a full-stack engineering team.
• Establish the UI/UX guidelines and component libraries for human-coded and AI-generated interfaces.
• Drive performance engineering initiatives and implement systemic solutions.
• Collaborate with product and design to translate complex financial workflows into intuitive UX.
• Mentor engineers on front-end fundamentals and framework trade-offs.

Skills

Front-end fundamentals

TypeScript

Architecture & design

Performance debugging

Mentoring

Tools

React

Angular

Vue

Job description

Dex is building AI agents to automate complex financial workflows and deliver client-ready documents at unprecedented speed. As Lead Front-End Engineer, you will own the front-end craft across the product, defining patterns and guidelines that all engineers follow, including agentic tooling interfaces.

You will set the rules for how AI agents interact with the UI, ensuring quality scales with a rapidly growing platform. This is a rare opportunity to shape how, not just what, we build.