--- title: 'Fullstack Software Developer - Mid level at Heat Geek' canonical: 'https://feeny.ai/job/fullstack-software-developer-mid-level-heat-geek-london-1anfzke0ddwq' type: 'job' last_seen: '2026-09-06' --- # Fullstack Software Developer - Mid level at Heat Geek - **Company:** Heat Geek - **Location:** London, United Kingdom - **Posted:** 2026-07-22 - **Last confirmed live:** 2026-09-06 - **Apply:** https://job-boards.eu.greenhouse.io/heatgeek/jobs/4935247101 ## Job description Type: Full-time Reports to: Co-founder, CEO ## What We Do At Heat Geek, we are tackling one of the UK’s biggest carbon contributors: home heating. 20% of all UK carbon emissions stems from home heating  – and that contribution is even bigger on a global scale. At Heat Geek, we are changing that. By simplifying a traditionally complex industry and revolutionising the technology used by installers, we’re making low-carbon heating mainstream. As of July 2026 we have prevented 2,600,000 tonnes of carbon from entering our atmosphere, and we're not stopping there! Join Us! People are at the core of who we are and what we do. From decreasing homeowners’ energy bills to help with the cost of living, to empowering talented heating engineers to perform outstanding installations, to ensuring a greener world for all of us, we believe in the power of what we can all do together. – And we need passionate, talented, hard working people to be a part of this journey. ## Your Mission Our Heat Geek community is excited to bring a Fullstack Software Developer into the team — a role that’s critical to how we grow and scale our platform. This is your chance to own meaningful product areas end-to-end, working across frontend, backend, and infrastructure to ship software that actually runs, actually helps users, and actually makes an impact. If you love the idea of steering real product decisions, getting stuck into code, and balancing technical quality with commercial pragmatism, this role is for you. If you’re reading this and it resonates, we know you could do this job anywhere — but we want you to do it HERE, with us, because we need persevering teammates who care deeply about making a real difference in the world. ## Role Outputs - Own and support features and systems end-to-end, from discovery through to production and iteration - Build, maintain, and improve production-ready frontend and backend systems - Work hands-on in the codebase — this is a coding-first role - Collaborate closely with the existing Product and Tech teams to solve real user problems - Quickly pick up new concepts, technologies, and domain knowledge when needed - Contribute to technical direction and raise the quality bar of the entire team’s output through example, not ceremony - Help ensure the platform runs, scales, and supports Heat Geek’s mission as we grow Candidate Requirements - Mid-level experience as a fullstack software engineer, with strong hands-on coding ability, particularly in Python - Proven ability to ship and maintain production software - Demonstrated pragmatism — you have a strong sense of when to refactor, when to ship, and when to leave things alone - Quick learner who can pick up new concepts and technologies efficiently - Strong ownership mindset — you don’t wait to be told what to fix - Clear communication skills and collaboration mentality It’s a bonus if you have… - Experience with Django - Real comfort across the full stack, happily spending time in both the frontend and backend - Experience with cloud / infrastructure, ideally GCP - Industry experience in renewable energy, heat pumps, utilities, or construction - Been in product-focused engineering environments - Worked in a startup or scale-up environment We believe great teams are built from different ways of thinking, learning, and living, and as such, we strive to build an organisation where people can show up as themselves. – Even if you don’t tick every box listed above, but are passionate about the work that we are doing and believe that you can make a positive impact here, we’d love to hear from you. So please drop us a message or share more detail in your application! Ways of Working + Benefits This is a 3-day-in-the-office hybrid role where you will work with the team at our office in Sustainable Ventures in Waterloo, Europe's biggest climate tech hub. It's a 5-minute walk from Waterloo Station and an energising space for anyone working on climate change. And don’t get us started on the epic view! Some of our measurable benefits include: - £5,000 contribution towards your own heat pump installation - Shares in the company, allocated under a tax-incentivised scheme - Salary that’s evaluated regularly, and based on skills, impact, and role scope—not negotiation tactics - Private medical & dental insurance - Learning and development budget - Annual summer retreat - Gym membership contribution - Season train ticket loan - Cycle to work scheme - Annual retreat with the whole Heat Geek team - Yoga, run club and social events with other sustainability startups in our co-working space …alongside monthly socials and regular collaboration opportunities with a team that’s passionate, hardworking, and kind. ## About Heat Geek ## Company Overview - **One-liner**: Heat Geek is a UK-based technology company that empowers independent installers with AI tools and a digital platform to accelerate heat pump adoption and decarbonise home heating. - **Entity Type**: Private (Seed + Venture funded) - **Headquarters**: London, United Kingdom - **Founded**: 2016 - **Founders**: Adam Chapman and Aadil Qureshi (Co-Founder & CEO) ## Core Business - **Primary industry**: Home energy / Heat pump installation / Climate tech - **Target customers**: B2C (homeowners) and B2B (independent heating installers) - **Mission**: To revolutionise home energy and make Net Zero a reality by enabling carbon-free heating through heat pumps. ## Products & Services - **[Heat Pump Installation Service](https://www.heatgeek.com/)**: Connects homeowners with certified, trained installers (Heat Geeks) for end-to-end heat pump installation, including AI-based design, financing, grants, and a performance guarantee with up to 7-year warranty. - **[Installer Community & Training](https://www.heatgeek.com/about)**: Largest community of independent renewable installers in the UK, offering training, support, and a knowledge hub. - **[Technology Platform](https://www.heatgeek.com/about)**: Uses LiDAR, AI, and data analytics to design optimal heat pump installations for each home. - **[Media Platform (YouTube)](https://www.heatgeek.com/about)**: Educational content with 69k subscribers and over 6 million views, pushing the industry forward. ## Market Standing - **Valuation/Market Cap**: Not disclosed (private) - **Key Metric**: Total Funding $4.7M (Seed round, Feb 2024) led by Transition, plus a venture round in March 2026 from Carrier Ventures (undisclosed amount) [linkedin.com](https://uk.linkedin.com/company/heat-geek) [ir.carrier.com](https://ir.carrier.com/news/news-details/2026/Carrier-Ventures-Invests-in-Heat-Geek-to-Accelerate-Heat-Pump-Adoption-Across-Europe/default.aspx) - **Notable Investors/Partners**: Transition (seed lead), Carrier Ventures (strategic investor), Which? Trusted Trader - **Growth Signals**: 26 employees (+3.4% YoY), 2,000+ heat pumps installed, 4.8★ customer rating, 11,679 LinkedIn followers (+24.7% yearly), active job postings increasing 100% monthly [linkedin.com](https://uk.linkedin.com/company/heat-geek) [heatgeek.com](https://www.heatgeek.com/) ## Competitive Advantages - Largest aggregate installer audience in the UK. - Proprietary AI tools for heat pump design (LiDAR, data analytics). - Digital-first experience with remote monitoring and performance guarantee. - Strong community and training for installers, creating a network effect. - Backed by Carrier, a global HVAC leader, providing credibility and scaling potential. ## Strategic Focus - Scaling the installer network across the UK and potentially Europe (Carrier Ventures investment suggests European expansion). - Continuing to develop AI and data-driven tools to improve installation efficiency and customer experience. - Driving adoption of heat pumps from early adopters to mainstream homeowners. ## Why Work Here - **Culture**: Values include "Steepen the Gradient" (high-velocity growth), "Jank it, Jujj it" (rapid prototyping and refinement), "Outcomes are our Legacy" (tangible climate impact), "Question the System", and "Embrace Eccentricity". Described as a place where you can have real climate impact, work hard, learn constantly, and laugh a lot [heatgeek.com/careers](https://www.heatgeek.com/careers). - **Perks**: Private health and dental insurance, gym membership contribution, £5,000 towards your own heat pump, cycle to work scheme, company options (equity), teamwide annual retreat [heatgeek.com/careers](https://www.heatgeek.com/careers). - **Work policy**: Likely hybrid/office in London (interviews involve onsite visits). Headquarters in London. - **Engineering culture**: Emphasis on building, data-driven decisions, and innovation. They have a Data Science & Insights Lead. - **Hiring process**: Initial call, dig deeper with manager, meet the team onsite (1-2 times). Simple and transparent [heatgeek.com/careers](https://www.heatgeek.com/careers). ## Sources 1. [heatgeek.com/careers](https://www.heatgeek.com/careers) 2. [heatgeek.com/about](https://www.heatgeek.com/about) 3. [heatgeek.com](https://www.heatgeek.com/) 4. [linkedin.com/company/heat-geek](https://uk.linkedin.com/company/heat-geek) 5. [ir.carrier.com](https://ir.carrier.com/news/news-details/2026/Carrier-Ventures-Invests-in-Heat-Geek-to-Accelerate-Heat-Pump-Adoption-Across-Europe/default.aspx) ## Other roles at Heat Geek - [Supply Chain & Planning Lead](https://feeny.ai/job/supply-chain-planning-lead-heat-geek-london-cszdre9j9z50) — London, United Kingdom - [Marketing Community Associate](https://feeny.ai/job/marketing-community-associate-heat-geek-london-c5dcn33esq1p) — London, United Kingdom - [iOS Developer](https://feeny.ai/job/ios-developer-heat-geek-london-ckwseerjy673) — London, United Kingdom - [Head of Finance](https://feeny.ai/job/head-of-finance-heat-geek-london-8ydhnp5ztk94) — London, United Kingdom - [Operations Associate - Planning & Supply Chain](https://feeny.ai/job/operations-associate-planning-supply-chain-heat-geek-london-rpjyn7yqdtga) — London, United Kingdom