Full Stack Engineer

Wave Group; Greater London; Hybrid; GBP 80,000 - 120,000; Full time

Job summary

Wave Group in London is seeking a Senior Full Stack Engineer to own features from discovery to production. You will build LLM-powered and real-time features across a modern TypeScript stack (React, Next.js, Node, NestJS) with Postgres/AWS and work directly with the founders to shape technical and product direction.

The role offers hybrid work with 3 days onsite and requires 4–9 years of experience and strong backend depth. UK right-to-work and address history are required.

Qualifications

• 4–9 years of production-scale TypeScript and React experience.
• Back-end depth with Node.js; NestJS is a plus.
• Experience building with LLMs/AI systems; startup/scale-up background.
• Right to work in the UK with clean UK address history.

Responsibilities

• Own features end to end, from discovery to production release.
• Build LLM-powered and real-time features beyond basic prompts.
• Work across a modern TS stack (React, Next.js, Node, NestJS) on Postgres/AWS.
• Collaborate with founders to influence technical and product direction.

Skills

TypeScript

React

Node.js

NestJS

LLMs/AI

Startup experience

Job description

Senior Full Stack Engineer (TypeScript,AI/LLM) | London | £80,000 - £120,000] | Hybrid, 3 days onsite

We're partnering with an AI-native software company building mission-critical tools for frontline public sector teams. Their users work in high-pressure environments where slow, fragmented systems cost time that matters. They're replacing that with a single, intelligent platform built around how people actually work.

They're now hiring a Senior Full Stack Engineer to join as an early member of a small engineering team, someone who wants real ownership of the product from day one rather than a backlog handed down to them.

What you'll be doing

• Owning features end to end, from talking to users and forming your own view on what to build through to shipping in production
• Building LLM-powered and real-time features that go beyond simple prompting, including voice and live data workflows
• Building across a modern TypeScript stack (React, Next.js, Node, NestJS) backed by Postgres and AWS
• Working directly with the founders, with real influence over technical and product direction

What they're looking for

• 4 to 9 years of experience, with strong, production-scale TypeScript and React
• Solid back-end depth in Node (NestJS a plus), not just front-end
• Startup or scale-up experience where you've shaped what got built, not just executed a spec
• Hands-on experience building with LLMs or AI systems, not just using AI tools day to day
• Someone who thinks in user problems first and technical solutions second
• Able to obtain UK security vetting (right to work and a clean UK address history required)

Why this one's worth a look

• A small team of generalists who move fast, ship often and keep a high bar
• Real early-stage ownership in a company with a clear, meaningful mission
• Products used by people doing genuinely important work every day