Job Description

We are looking for a Lead Full-Stack Engineer to take technical ownership across backend and frontend development, shaping high-quality, scalable solutions and setting engineering standards for the team. This role combines hands-on delivery with technical leadership, mentoring, and close collaboration with product and platform teams.


You will work across modern backend services built in Kotlin, rich frontend applications using React and Next.js with TypeScript, and cloud-native infrastructure on Azure or AWS.

This is an initial 6 month contract (outside iR35) that requires you onsite in London Paddington 3 days a week.

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Key Responsibilities

Lead the design and development of full-stack solutions, balancing backend robustness with high-quality user experiences Build and maintain backend services using

Kotlin

, following clean architecture and best practices Develop modern, performant frontends using

React, Next.js, and TypeScript

Take ownership of API design, integration, and lifecycle management using

Apigee

Design and operate cloud-native solutions using

Azure or AWS

, including containerised workloads Champion strong

observability practices

, ensuring systems are reliable, measurable, and easy to troubleshoot Set technical direction, standards, and best practices across the team Mentor and support other engineers through code reviews, pairing, and technical guidance Collaborate closely with Product, DevOps, and Architecture to deliver scalable, secure solutions

Requirements

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Required Skills & Experience

Proven experience in a

Lead or Senior Full-Stack Engineering

role Strong backend development experience with

Kotlin

Solid frontend expertise with

React, Next.js, and TypeScript

Experience building and operating cloud-based systems on

Azure or AWS

Hands-on experience with

containerisation

(e.g. Docker, Kubernetes or similar) Strong experience with

API management

, ideally using

Apigee

Deep understanding of

observability

, including logging, metrics, tracing, and alerting Experience designing and maintaining scalable, production-grade systems Strong communication skills and the ability to influence technical decisions
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Nice to Have

Experience working in complex, distributed systems Exposure to CI/CD pipelines and DevOps practices Experience modernising legacy systems or platforms

Benefits

We offer

Competitive Rates Flexible working arrangements Opportunities for professional development and career advancement within a global company A dynamic, innovative, and supportive work environment, where your ideas and contributions are valued The chance to work on cutting-edge projects that are transforming the industry * Most of all you get to work with a bunch of great people, where the whole team owns the project together in a politics-free environment. Our culture reflects our lean and self-organisation attitude. We encourage our colleagues to take risks, make decisions, work in a collaborative way and talk to everyone to enhance communication. Freedom and Responsibility go hand in hand, and we value commitment, feedback, and empathy.