At a Glance
- Tasks: Join a squad to develop innovative software for solar energy solutions.
- Company: Sunsave, a fast-growing tech company revolutionising energy supply.
- Benefits: Competitive salary, hybrid work model, and opportunities for professional growth.
- Other info: Dynamic team environment with a focus on collaboration and innovation.
- Why this job: Make a real impact in the renewable energy sector while honing your engineering skills.
- Qualifications: 2+ years of software development experience; familiarity with TypeScript and React is a plus.
The predicted salary is between 63000 - 77000 £ per year.
Sunsave | Product Engineer (Mid-Level / Senior) | London, United Kingdom (Holborn) | ONSITE (hybrid, 3 days/week in office) | Full-time Sunsave is building what replaces your energy supplier.
Customers switch to solar and a battery with nothing to pay upfront: kit, install, finance and long-term protection in one package, and the battery trades energy on the grid every day to push their bills towards zero.
Founded in 2022, £113m Series A (equity and debt) in 2025, more than 3x growth last year, nearly 90 people.
I lead engineering and data science.
Software runs every step of the customer journey: the quote, the finance application, the contract, the install and the battery trading.
You'd join a small squad on one area: acquisition (website, quote, finance, contract), installation, in-life (customer app, monitoring, maintenance) or energy (battery optimisation and grid trading).
Product engineers here own problems end to end, from working with the people who use what they build to running it in production.
Agents do a lot of the implementation.
We expect you to use them every day, delegate the implementation but never the thinking, and own every line you merge.
We offer finance and hold customer data, so correctness, auditability and security matter a lot.
Experience: 2+ years running production software for mid-level, 6+ for senior.
Type Script, Nest JS, React/Next. js, Postgre SQL and AWS are a plus but not required.
Right to work in the UK required.
The interview is built for how we work.
No leetcode.
A ~45 min async review of a pull request written with AI, then a ~90 min live session where you shape and build a small problem close to our work with your own AI tools.
Product Engineer (Mid-Level / Senior) in London employer: MexicoDev
MexicoDev is an attractive employer due to its commitment to innovation in the renewable energy sector. The company offers a hybrid working model, allowing employees to balance their professional and personal lives while contributing to impactful projects. With opportunities for career advancement and a focus on employee engagement, MexicoDev provides a supportive and dynamic work environment.
StudySmarter Expert Advice🤫
We think this is how you could land Product Engineer (Mid-Level / Senior) 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 MexicoDev 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 MexicoDev.
✨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 MexicoDev.
✨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 MexicoDev 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 Product Engineer (Mid-Level / Senior) 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 MexicoDev.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at MexicoDev 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 MexicoDev
✨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 MexicoDev 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.
