Fullstack Software Developer - Mid level

About the role

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.

What you'll do

• Our Heat Geek community is excited to bring a

What they're looking for

✦ Select any requirement to ask Aptiora about your fit, evidence or application.

• Mid-level experience as a

Benefits & working conditions

• 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.