We’re on a mission to make it simple and affordable for every home in the UK to be heated and powered by clean, green electricity. Our customers are the installers who are at the forefront of this transition, but who have historically been overlooked and left struggling with outdated, ineffectual software. Since getting started at the beginning of 2024, we’ve grown exponentially, have raised several rounds of funding from top tier VCs, and now support over 500 heat pump installation businesses across the UK.
Role
As a Lead Full Stack Engineer, you’ll sit at the intersection of hands‑on technical work, team leadership, and product strategy. You’ll still write a bunch of code — especially the hard, high‑leverage parts — but your impact will increasingly come from setting direction, unblocking others, and raising the bar across the team. Working closely with engineers, designers, and product leadership, you’ll help ensure we’re building the right things in the right way at the right time.
Responsibilities
- 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
- Step into a first formal lead role from a senior IC position, or already lead teams while staying close to technical work
The Problem Space
- 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)
Technologies
- Docker, Docker Compose
- PostgreSQL, PostGIS, Atlas migrationsNode, Prisma
- React, TypeScript, Konva, Tailwind
Requirements
We’re looking for a candidate who has 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 building healthy, high‑trust teams
And who is:
- Product‑mindful: wanting to understand real users and problems, not just tickets
- Impact‑driven: balancing technical quality with momentum and knowing when “good enough” is right
- Comfortable with ownership: taking responsibility for outcomes
- Candid and collaborative: challenging ideas, receiving feedback, and optimising for the team over ego
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: minimum 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
#J-18808-Ljbffr…