Senior Full-Stack Software Engineer

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Job Description

Senior Full-Stack Software Engineer


London (Victoria) · 3 days in office · £100,000 – £120,000 · Permanent


Our client is a newly launched, VC-backed tech business operating in a highly traditional professional services sector. Founded by repeat founders with a track record of building and scaling high-growth, category-leading consumer businesses, they are using AI and automation to fundamentally reimagine how services in their space are delivered.


The opportunity


This is a rare greenfield engineering role at a genuinely early-stage business. The successful candidate will join a small, senior founding team and take real ownership of the technical foundation from day one — building the stack, setting the architecture, and establishing the patterns that everything else will be built upon.


The role spans customer-facing product, backend automation, AI agent orchestration and internal tooling — with significant scope to grow as the business scales.


What you'll be doing


  • Building the customer-facing platform from the ground up — timelines, task-based views and embedded AI assistance
  • Owning backend automation workflows, AI agent orchestration and data pipelines
  • Building internal tooling to support the team in reviewing and approving AI-generated work
  • Setting engineering patterns and architecture that future hires will build on


What they are looking for


  • 5+ years building modern web applications with a strong backend emphasis
  • Strong command of React/Next.js and Python/TypeScript
  • Experience with AI agent orchestration frameworks (e.g. LangGraph, OpenAI Agent SDK)
  • The architectural judgment to make confident decisions on a fast-moving, greenfield stack
  • A background in high-growth, VC-backed startups — you thrive in fast, dynamic environments
  • London-based with existing right to work in the UK (visa sponsorship not available)


Why this role


  • A true ground-floor opportunity at a well-funded, early-stage business disrupting a traditional sector
  • Founding team with a proven track record — previously built one of the UK's fastest growing consumer brands
  • Backed by respected VC funds with a recent funding round closed
  • Real ownership and influence over product and architecture from day one
  • Work at the cutting edge of AI and automation in a sector ripe for disruption


If this role sounds of interest, please apply now!

Apply
Location:
London
Job Type:
FullTime
Category:
Technology

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