At a Glance
- Tasks: Design and develop high-quality iOS applications to support our mission against carbon emissions.
- Company: Join Heat Geek, a passionate team tackling climate change through innovative technology.
- Benefits: Enjoy a competitive salary, health insurance, shares, and a learning budget.
- Other info: Work in a vibrant climate tech hub with awesome views and a supportive community.
- Why this job: Make a real impact on the environment while growing your tech skills.
- Qualifications: Strong knowledge of Swift and a passion for building great software.
The predicted salary is between 54000 - 66000 £ per year.
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. As of July 2026, we have prevented 2,600,000kg of carbon from entering the atmosphere, and we aren't stopping there! 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. We need passionate, talented, hard working people to be a part of this journey.
Your Mission
Our Heat Geek community is excited to bring an iOS Developer into our team. This is your opportunity to take on a role that’s vital to how we build and evolve Heat Geek’s mobile experience. As an iOS Developer, you’ll help design, build, and maintain high-quality iOS applications that support both our internal teams and our wider Heat Geek community. You’ll work closely with product, design, and backend engineers to solve complex, real-world problems — turning ambiguity into reliable solutions.
Build, ship, and maintain high-quality iOS applications using modern Apple technologies.
- Take ownership of features from concept through to production and iteration.
- Collaborate closely with product managers, designers, and backend engineers to deliver impactful user experiences.
- Write clean, testable, and maintainable code that scales as our products grow.
- Debug, improve performance, and continuously raise the quality bar of our iOS codebase.
- Contribute to technical discussions, architectural decisions, and best practices within the engineering team.
Candidate Requirements
- Strong knowledge of Swift and Apple’s iOS ecosystem.
- Ability to take ownership of problems and work autonomously from idea to implementation.
- Comfort working in complex, non-trivial problem domains.
- A demonstrated passion for learning, improving, and building great software.
It’s a bonus if you have…
- Experience with modern iOS technologies such as SwiftUI, Combine, TCA, or ARKit.
- Exposure to full-stack development or an interest in how mobile apps interact with backend systems.
- Experience with heat pumps, renewable energy, construction, or utilities.
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.
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.
- Season train ticket loan.
- Cycle to work scheme.
- Annual retreat with the 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.
iOS Developer (Junior or Mid-level) employer: Heat Geek
At Heat Geek, we are not just tackling the challenge of home heating; we are fostering a vibrant work culture that prioritises sustainability and employee 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 opportunities for professional development, all while making a tangible impact on the UK's transition to low-carbon heating.
StudySmarter Expert Advice🤫
We think this is how you could land iOS Developer (Junior or Mid-level)
✨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 iOS Developer (Junior or Mid-level)
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.
