Lead Full Stack Engineer

Role Overview

• Own architecture and technical strategy for a core domain or set of systems.
• Design, guide, and build complex, cross-cutting solutions that span multiple parts of the product.
• Write high-leverage code: reference implementations, critical paths, foundational frameworks.
• Lead technical discussions, make trade-offs explicit, and help teams align.
• Mentor senior engineers and develop others into technical leaders.
• Coach engineers in how to make decisions, rather than making every decision yourself.
• Proactively identify scaling risks, bottlenecks, and areas of technical debt — and drive solutions.

Requirements

• We care less about titles and more about impact, judgment, and intent.
• You’ll likely have experience with:
• Modern JavaScript / TypeScript and frontend frameworks
• Backend development and API design
• Relational databases and data modelling
• Solving ambiguous, real-world problems end-to-end
• Mentoring and/or building healthy, high-trust teams
• But more importantly, you are:
• Product-minded — you want to understand real users and real problems, not just tickets
• Impact-driven — you balance technical quality with momentum and know when “good enough” is exactly right
• Comfortable with ownership — you take responsibility for outcomes, not just code
• Candid and collaborative — you challenge ideas openly, receive feedback well, and optimise for the team over ego
• Whether you’re growing into seniority or already operating at staff/lead level, you’ll find space here to do the best work of your career.
• …and you’ll hopefully also love heat pumps! 🤓

Tech Stack

• JavaScript
• TypeScript

Benefits

• 💰 Salary (depending on experience, impact, and location): £90–130k
• 🍰 Meaningful slice of equity (options) in the company
• 🏖️ 33 days holiday and opportunity to work from abroad for another 30 days each year
• 🏡 Hybrid working: Min. 2 days in-person a week (London or Bristol)
• 👧 Workplace Nursery Benefit scheme (YellowNest)
• 🚲 Cycle to Work scheme
• 🤝 Full-team meetups every fortnight with paid travel, accommodation and dinner
• 👨‍👩‍👧‍👦 Brilliant team to learn from and massive opportunity to grow