Lead Front-End Engineer (up to £175k)

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. If you're interested sign up to Dex to apply. Dex is an AI recruiter agent that helps you run your job search. Tell Dex your stack, seniority, and what you want to build. We will manage your applications and surface other opportunities that are a fit. The role This company builds AI agents that automate complex, data-intensive workflows for financial services. These digital teammates reason across vast datasets, write code, and produce client-ready outputs — often 20x faster than human consultants. They've achieved significant traction in under a year, securing one of the largest Series A rounds in fintech history from leading investors. You'll join as a Lead Front-End Engineer, owning the front-end craft across the entire product. This isn't about building features in isolation. It's about defining the architectural patterns, guidelines, and quality standards that every engineer — and even the AI agents themselves — will build against. You'll shape how a full-stack team scales its UI output, ensuring consistency and performance as the company grows rapidly. The work Define and implement core UI architecture and design systems.Establish front-end best practices and coding standards for a full-stack engineering team.Guide the integration of AI-generated UI components, ensuring consistency and quality.Drive performance engineering initiatives, identifying and resolving deep-seated bottlenecks.Mentor engineers on front-end excellence and maintain a high bar for craft. What You Bring Deep front-end fundamentals. You understand browser internals, rendering pipelines, and can articulate trade-offs beyond specific frameworks.Proven experience designing and implementing scalable front-end architectures and design systems.Serious performance engineering instincts. You diagnose and fix root causes, not just surface-level symptoms.Expert-level TypeScript.Obsessive attention to detail and a high bar for UI craft. Why apply through Dex This is a rare Lead Front-End role at a high-growth AI company. Dex helps you cut through the noise, get a proper brief on the client and role, and ensures your application stands out. Skip the cold apply; get matched and prepped. If you're interested, sign up to Dex to apply - https://jobs.meetdex.ai/jobs/f280eef8-f2fe-434f-95bf-17c31df0aaa4 As part of the recruitment process at Dex, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.