Senior Full-Stack Engineer - AI Startup (London, 4 days)

Infused Solutions; Greater London; On-site; GBP 120,000 - 150,000; Full time

Benefits offered by this job

Four days in the office

Direct exposure to founders

Ownership from day one

London-based

Work with AI tools

Job summary

Infused Solutions is seeking a Senior Full-Stack Engineer to join an early-stage AI startup in London, working four days per week in the office. You’ll own features across the stack, influence architecture, and help shape the product as the company scales.

You’ll work with a small, high-performing team, using TypeScript, Node.js and React, and you’ll apply AI-enabled development tools to accelerate delivery. This is a permanent role with substantial ownership.

Qualifications

• 8+ years of commercial software engineering experience.
• Strong full-stack development with no significant frontend/backend bias.
• Hands-on experience with TypeScript, React, Node.js.
• Proven production software experience and ownership of features.
• Familiarity with APIs, cloud platforms and modern dev practices.
• Regular use of AI coding/development tools (e.g., Claude Code, Cursor).

Responsibilities

• Build and deliver end-to-end product functionality across the full stack.
• Develop and maintain high-quality production software.
• Work across backend, frontend, database and API development.
• Contribute to technical architecture and engineering decisions.
• Take ownership of features from concept to production.
• Shape product roadmap with founders and leadership.
• Establish strong engineering standards as the team grows.
• Use AI-assisted tools to accelerate development.
• Troubleshoot and improve production systems.
• Contribute to AI-powered and agentic solutions.

Skills

8+ years of experience

Full-stack development

TypeScript

React

Node.js

Production software

Ownership & initiative

AI coding tools

APIs & cloud platforms

Tools

Docker

CI/CD

Infrastructure as Code

AWS

GCP

Vertex AI

REST APIs

Git

Job description

Infused Solutions is seeking a Senior Full-Stack Engineer to join an early-stage AI startup in London, working four days per week in the office. You’ll own features across the stack, influence architecture, and help shape the product as the company scales.

You’ll work with a small, high-performing team, using TypeScript, Node.js and React, and you’ll apply AI-enabled development tools to accelerate delivery. This is a permanent role with substantial ownership.