At a Glance
- Tasks: Develop and maintain impactful software for low-carbon heating solutions.
- Company: Join Heat Geek, a leader in sustainable technology and innovation.
- Benefits: Generous salary, health insurance, shares, and a vibrant work environment.
- Other info: Hybrid role in a dynamic climate tech hub with great team culture.
- Why this job: Make a real difference in tackling climate change while advancing your career.
- Qualifications: Senior fullstack development experience with strong coding skills required.
The predicted salary is between 60000 - 80000 £ per year.
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. We are on track to prevent 1,000,000 kg of carbon from entering our atmosphere in Q1 of 2026, and we won’t stop 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 Senior Fullstack 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 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
- Senior-level experience as a fullstack developer, with strong hands-on coding ability
- Proven ability to ship and maintain production software
- Demonstrated pragmatism — you know when to refactor, when to ship, and when to leave things alone
- Successful mentorship experience
- 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 ticket loan
- Cycle to work scheme
- 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.
Senior Fullstack Developer in London employer: Heat Geek
At Heat Geek, we are not just tackling the pressing issue of home heating emissions; we are fostering a vibrant work culture that prioritises people and their growth. Located in the heart of Europe's largest climate tech hub, our team enjoys a hybrid working model, competitive benefits including a £5,000 contribution towards heat pump installation, and ample opportunities for professional development. Join us to make a meaningful impact while collaborating with passionate colleagues in an inspiring environment.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Fullstack Developer in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Heat Geek or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Heat Geek.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Heat Geek.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Heat Geek that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Fullstack Developer in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Heat Geek.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Heat Geek and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Heat Geek
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Heat Geek uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
