Hybrid Full Stack Engineer

at Spruce

• Job title: Full Stack Engineer
• Job type: Full Time
• Experience level: Mid level, Senior
• Salary: £40,000 - £100,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: JavaScript, TypeScript
• Location requirements: Hybrid, London, United Kingdom

About the role

• Full Stack Engineer collaborating with a small team to develop tools for heat pump installers in the UK, addressing production challenges and enhancing user experience.

Responsibilities

• You’ll work closely with a small, high-calibre team of engineers, designers, and domain experts to build and scale the tools that power the Spruce platform.
• Depending on your experience, you might:
• Own and deliver complex features end-to-end
• Shape system architecture and technical direction
• Mentor others and raise the bar across the team
• Or, if earlier in your career, you’ll learn fast by working on meaningful production problems with high ownership from day one.
• The problem space is deep and varied, including:
• Heat loss modelling and hydronic system design
• 2D and 3D floor-plan tooling using LiDAR and computer vision
• Large-scale data ingestion and geospatial analysis
• Offline-first, collaborative PWAs
• Hardware integrations (Bluetooth measurement tools, sensors, monitoring systems)
• This is not CRUD-only work. You’ll be working meaningful production problems from day one that blends physical reality, real-world constraints, and serious impact.

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
• 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 relatively early in your career or already operating at Senior level, you’ll find space here to do the best work of your career.

Benefits

• 💰 Salary (depending on experience, impact, and location):
• Junior Engineer: £40–50k
• Mid-level Engineer: £50–80k
• Senior Engineer: £80–100k
• 🍰 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