Lead Full Stack Engineer

£100,000 | 10+ years' experience | Full time | Quarterly office visits

Permanent – UK-based SaaS scale-up

Our client is a fast-growing SaaS company operating in the B2B sales and marketing technology space.

The business is profitable, healthy and growing - expanding its product suite while continuing to invest heavily in the technology and people behind it. It's a genuine "One Team" culture, with a strong focus on growth, ownership and giving back to the wider community.

We're looking for a Lead-level Full Stack Software Developer to join a small, senior team building the company's customer-facing products. You'll be technically leading work from initial design through to full implementation - iterating quickly on a modern tech stack (Node.js microservices, Vue, Redis, SQL Server and Snowflake) and deploying to production in AWS every day, following a DevSecOps approach.

This is a hands-on lead role: part high-performing individual contributor, part lead developer and embedded architect. You'll work closely with stakeholders and customers directly, shaping solutions from the ground up rather than simply executing a backlog.

AI is central to how this team works. You'll be expected to use AI heavily to accelerate delivery and stay ahead as the tooling evolves - the team is intentionally kept small, with AI acting as a genuine force-multiplier rather than a replacement for headcount.

• Partnering with stakeholders on initial solution design, scoping and system design
• Spiking areas of uncertainty and building proofs of concept where needed
• Working with initiative managers to break work down into deliverable epics and stories
• Turning user stories into production code — as an individual contributor and as lead developer/embedded architect within a small squad
• Owning the quality, maintainability and operability of what you and the team build
• Supporting live products in production and resolving issues as they arise
• Contributing to architecture and implementation decisions across the product

• 10+ years' full stack development experience, ideally on large-scale SaaS platforms
• 5+ years' JavaScript and TypeScript experience — essential for this role
• Strong system design and domain modelling experience, with a commercial mindset
• Experience with clean code, SOLID principles and design patterns
• Comfort working in a mature CI/CD environment, deploying to production daily
• A forward-thinking approach to using AI to accelerate high-quality software delivery
• Excellent interpersonal and collaboration skills, including working directly with customers
• Experience with automated testing, quality assurance and building systems that perform at scale
• Enthusiasm for security best practice and driving high engineering standards
• A technical/computer science degree or equivalent professional experience

• £100,000 salary
• Employment with a fast-growing UK SaaS company
• Competitive benefits package
• A genuine "One Team" culture built around growth and high standards
• Volunteer days, fundraising and community involvement

Get in touch to find out more or to submit your application - we'd love to hear from you.