Lead Platform Engineer: AI-Driven Backend & Microservices

La Fosse

Greater London

On-site

GBP 96,000 - 160,000

Full time

2 days ago

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Job summary

La Fosse is seeking a Lead Software Engineer (backend and AI focus) in London. The role centers on building scalable Node.js backends and AI-enabled features, with hands-on leadership in a fast-moving startup environment.

You will collaborate with the Head of Engineering to define technical strategy and architecture, while shaping AI-driven products and workflows. The ideal candidate has deep Node.js/TypeScript experience, a passion for AI, and comfort working across Python-driven AI

Qualifications

Strong commercial experience with Node.js, TypeScript, NestJS, REST APIs and distributed systems.
Experience building products in startups, scale-ups or high-growth technology businesses.
Hands-on experience with Python and an interest in Generative AI, LLMs, AI Agents, AI Automation.
Experience integrating with models such as OpenAI, Anthropic Claude, Gemini or open-source LLMs.
Strong understanding of system design, microservices, event-driven architecture and cloud-native development.

Responsibilities

Building and scaling backend services using Node.js and TypeScript.
Developing AI-powered features, agentic workflows, and automation tools.
Working closely with engineering leadership on technical strategy and architecture.
Using Python to support AI, data, and machine learning initiatives.
Taking products from idea through to production in a high-ownership environment.
Helping shape engineering best practices in an AI-first business.
Managing a small engineering team.