Lead Full Stack Engineer

Company: La Fosse Associates
Apply for the Lead Full Stack Engineer
Location: London
Job Description:

Lead / Staff Full-Stack Engineer (Individual Contributor Focus)6-Month Contract | Outside IR35 | Paddington (3 days/week)

We are partnering with a prominent consumer platform undergoing a major digital transformation and seek a Lead / Staff Full-Stack Engineer to join as a hands‑on contributor with strong end‑to‑end ownership.

This role involves full‑stack development across backend and frontend, coupled with technical ownership of solutions, focusing on building scalable, high‑quality systems within a modern cloud‑native environment.

About the Role

As a Lead / Staff Full‑Stack Engineer, you will design and deliver comprehensive solutions spanning backend services, frontend applications, and cloud infrastructure. You will work in a modern, collaborative environment prioritising performance, reliability, and user experience.

Key Responsibilities

  • Design and develop full‑stack solutions balancing backend robustness with exceptional user experiences
  • Build and maintain backend services using Kotlin, adhering to clean architecture principles
  • Create modern frontend applications using React, Next.js, and TypeScript
  • Own API design, integration, and lifecycle management (Apigee)
  • Contribute to system design and make informed technical decisions
  • Write clean, maintainable, and high‑quality code

Cloud and DevOps

  • Design and operate cloud‑native solutions on Azure or AWS
  • Work with containerised environments such as Docker and Kubernetes
  • Contribute to CI/CD pipelines and modern delivery practises
  • Implement observability across systems, including logging, metrics, tracing, and alerting

Engineering Standards and Collaboration

  • Establish and uphold engineering standards and best practises
  • Support colleagues through code reviews and technical guidance
  • Collaborate closely with Product, DevOps, and Architecture teams
  • Contribute to designing scalable, secure, and maintainable systems

Requirements

  • Proven experience as a Senior, Lead, or Staff Full‑Stack Engineer in hands‑on roles
  • Strong backend development skills using Kotlin
  • Solid frontend experience with React, Next.js, and TypeScript
  • Experience building and operating cloud‑based systems (Azure or AWS)
  • Hands‑on experience with containerisation and distributed systems
  • Strong knowledge of API management, preferably Apigee
  • Deep understanding of observability and production system monitoring
  • Experience delivering scalable, production‑grade systems
  • Excellent communication skills with the ability to influence technical decisions

Desirable

  • Experience working in complex, distributed environments
  • Familiarity with CI/CD and DevOps practises
  • Experience modernising legacy platforms or systems

What We Offer

  • Six‑month contract outside IR35 with potential extension
  • Hybrid working: three days per week at Paddington
  • Opportunity to contribute to large‑scale, high‑impact digital platforms
  • Collaborative, engineering‑led culture with strong technical ownership

If you are a hands‑on full‑stack engineer passionate about building end‑to‑end systems and working across modern backend, frontend, and cloud technologies, we would love to hear from you.

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Posted: May 25th, 2026