Full Stack Engineer

Senior Full Stack Developer London | Hybrid (3 days in office) | Competitive Salary + Equity I’m working with a fast-growing ClimateTech company that is transforming the way the UK approaches home heating, building technology that helps accelerate the transition towards a lower-carbon future. Their mission is to simplify a traditionally complex industry and empower installers and homeowners with better tools and technology. They’re now looking for a Senior Fullstack Developer to join their product and engineering team, a hands-on senior engineer who can take ownership of meaningful product areas, run with features end-to-end, and help shape the future of a mission-driven platform. The Role This is a genuinely hands-on, coding-first role for an experienced engineer who wants to own meaningful product areas from discovery through to production and iteration. You'll be trusted to take ownership, run with features independently and help shape the technical direction of the platform through high-quality engineering, not people management. Working across the frontend, backend and infrastructure, you'll collaborate closely with Product and Engineering to solve real user problems, ship production-ready software and support the continued growth of the platform. You'll be responsible for: Owning features and product areas end-to-end, from discovery and technical decisions through to delivery and iterationBuilding, maintaining and improving production-ready frontend and backend systemsWorking hands-on across the stack, with a strong focus on writing high-quality, scalable codeTaking ownership of technical challenges and driving solutions independentlyCollaborating closely with Product and Engineering teams to solve real user problemsMaking pragmatic engineering decisions, knowing when to improve, refactor, or shipContributing to technical direction and helping raise the quality of engineering practices through exampleSupporting the scalability, reliability and continued growth of the platform as the company evolves What we're looking for: 10+ years’ experience as a software engineer with strong full stack development experienceStrong hands-on coding ability across frontend and backend systemsA strong Python background (essential)Experience building and maintaining production software at scalePrevious startup or scale-up experience (essential)Someone who can take ownership of features, run independently, and drive things forward without needing heavy directionA pragmatic engineer who understands when to refactor, when to optimise, and when to shipExperience mentoring other developers and helping raise engineering standards through exampleStrong communication skills and a collaborative mindset Nice to have: Experience with DjangoCloud/infrastructure experience, ideally GCPExperience working within ClimateTech, Energy, Utilities, ConstructionTech or related industriesExperience working in product-led engineering teams This would suit someone who wants to be a senior technical contributor in a mission-driven company, owning meaningful problems, working closely with product, and seeing the direct impact of the software they create. Working Pattern: Hybrid 3 days in office (London) Salary: £80,000 - £100,000 + Equity If this sounds like you, or someone in your network, I'd love to hear from you. Please send across your CV to Zoe.hinkinson@propellondon.com