Technical Lead, Developer Experience (up to £150k)

Dex; United Kingdom; On-site; GBP 120,000 - 180,000; Full time

Job summary

Dex is seeking a Staff-level full-stack engineer to lead a team of five engineers building customer-facing web apps including analytics dashboard, docs platform, marketing site, sign-up, and billing flows. You will report to the CTO and shape DevEx vision, ensuring scalable architecture.

You bring strong React and TypeScript, backend experience with Ruby on Rails or Node.js, prior leadership, and a track record integrating AI tools and LLMs to boost velocity.

Qualifications

• Strong full-stack JavaScript skills with React and TypeScript.
• Proven experience leading a small engineering team.
• Clear point of view on developer tooling and DX.
• Experience integrating LLMs/AI into engineering workflows with velocity gains.
• Empathy for developer customers and good API design.

Responsibilities

• Lead a team of five full-stack engineers with hands-on leadership.
• Own end-to-end architecture for all customer-facing web apps.
• Drive adoption of AI tools to multiply productivity.
• Set high standards for code review, testing, and incident response.
• Collaborate with SDK and realtime infrastructure teams to ensure cohesive DX.

Skills

Full-stack JS

Leadership

Developer Experience

AI/LLMs

API design

Tools

Ruby on Rails

Node.js

Job description

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.

The role

This company builds the realtime messaging infrastructure behind products used by millions of devices, processing billions of messages daily for global brands. Their customers are developers. Earning their trust means obsessing over every surface they touch: the analytics dashboard, the documentation, the sign-up journey, the billing UI.

This is a Staff-level, full-stack role. You'll report directly to the CTO, co-own the DevEx vision, and lead a team of five engineers responsible for every customer-facing web application. You are the target user of what your team builds; this isn't a feature factory. You'll set the technical architecture, push for rapid iteration, and ensure your team acts as principal stakeholders, not just implementers.

The work

• Lead a team of five full-stack engineers, balancing hands-on technical leadership with people development.
• Own the end-to-end technical architecture for all customer-facing web applications: analytics dashboard, documentation platform, marketing site, sign-up, and billing flows.
• Drive the adoption and integration of AI tools and LLMs to significantly multiply team productivity and velocity.
• Set the bar for engineering excellence across code review, testing, and incident response.
• Collaborate closely with SDK and realtime infrastructure teams, ensuring a cohesive developer experience from the ground up.

What You Bring

• A strong full-stack JavaScript engineer (React, TypeScript) with proven backend experience in Ruby on Rails or Node.js.
• Hands-on experience leading a small engineering team, comfortable with both technical direction and people management.
• A clear, articulated point of view on developer tooling and what constitutes excellent Developer Experience.
• Demonstrated ability to integrate LLMs or AI tools into engineering workflows, with concrete examples of velocity gains.
• Genuine empathy for developer customers, instinctively understanding good API design and documentation.