Full-Stack AI & Automation Engineer

WALT Labs; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

WALT Labs in Greater London seeks a capable Full Stack Developer to build and ship the Companion product suite — an AI-powered automation and intelligence platform.

You will implement Companion modules, AI agents, automation workflows, MCP server integrations, and ensure production-grade code with tests and security.

Reporting to the VP of Product, you’ll deliver roadmap features and contribute to secure, scalable integrations with Salesforce, QuickBooks, Harvest, and BigQuery.

Qualifications

• 3+ years of full-stack software development with production deployments.
• Proficiency in modern frontend frameworks (React or equivalent) and backend API development.
• Experience building and integrating with APIs, webhooks, and third-party platforms.
• Solid understanding of CI/CD pipelines, version control (Git), and release management.
• Demonstrated ability to write clean, tested, maintainable code with security in mind.

Responsibilities

• Develop Companion modules across UI, API, data, and AI agent layers.
• Implement AI agents, automation workflows, and routing logic connecting to systems.
• Build and maintain MCP servers and cross-system integrations (Salesforce, QuickBooks, Harvest, BigQuery).
• Write production-grade code with tests; follow CI/CD, security, and release processes.
• Own operational health of features including monitoring, incidents, and post-deploy fixes.

Skills

Full-stack

React frontend

Backend APIs

APIs & Integrations

CI/CD & Git

Security mindset

Job description

WALT Labs in Greater London seeks a capable Full Stack Developer to build and ship the Companion product suite — an AI-powered automation and intelligence platform.

You will implement Companion modules, AI agents, automation workflows, MCP server integrations, and ensure production-grade code with tests and security.

Reporting to the VP of Product, you’ll deliver roadmap features and contribute to secure, scalable integrations with Salesforce, QuickBooks, Harvest, and BigQuery.