Senior Software Engineer (AIX) in Bristol

Unfortunately we are unable to offer sponsorship for this role.

Where you’ll work: Depending on the needs of your business area, we expect hub based people to be in the office at least once a week, and to go to OVO Connection events in-person. You’ll be assigned to the closest one of our three hub offices, Bristol, Glasgow, or London; unless your role requires field‑based work. Each hub has accessible spaces to park your laptop, is designed to inspire people, help them connect and bring big ideas to life.

At OVO, we are on a mission to solve one of humanity's biggest challenges, the climate crisis. And we know it takes all of us to change the world. That's why we need diverse people from all abilities, gender identities, ethnicities, ages, sexual orientations, life experiences and backgrounds to join us.

As a Senior Software Engineer, you’ll own the end‑to‑end development of complex systems and features that are core to our business. You will lead technical initiatives, make critical design decisions, and mentor engineers to elevate the team's capabilities. Your expertise will be the driving force that ensures we build scalable, high‑quality software that pushes our company forward. This role involves collaborating with multidisciplinary teams to develop AI‑driven products delivered through mobile applications. Ideal candidates will have experience bringing AI solutions to market and working within the constraints of mobile platforms.

Your key outcomes will be:

• Technical Leadership & Architecture: Drive the architectural vision for key features, designing robust, scalable systems and contributing to the technical roadmap to influence the future direction of the product.
• Engineering Excellence & Quality: Champion best practices by writing clean, efficient code, leading rigorous code reviews, and implementing comprehensive automated testing to ensure high‑quality, performant solutions.
• Mentorship & Team Growth: Lead and mentor other engineers, fostering a culture of continuous learning and collaboration through knowledge sharing, technical discussions, and constructive feedback.
• Project Execution & Delivery: Translate complex projects into clear, executable tasks within an Agile framework, proactively resolving blockers to ensure the timely and efficient delivery of team commitments.
• Community & Knowledge Sharing: Actively contribute to the wider engineering community by leading discussions, sharing expertise through documentation and workshops, and driving the exchange of best practices.

You’ll be successful here at OVO if you…

• Professional Experience: Significant hands‑on experience developing software in an agile environment, with a proven track record of delivering high‑quality, clean code.
• Backend & Architecture: Expertise in designing and building scalable microservices‑based architectures using languages like Node.js, Python, and TypeScript.
• Cloud & DevOps: Hands‑on experience with cloud platforms (GCP, AWS), containerization (Docker, Kubernetes), and modern CI/CD practices.
• Frontend Development: Proficiency in modern frontend frameworks such as React.js and/or React Native.
• Leadership & Mentorship: Proven ability to lead technical initiatives and mentor other engineers, fostering a culture of technical excellence.
• Collaboration & Problem‑Solving: Excellent communication and analytical skills, with the ability to thrive in a high‑ownership, collaborative team environment.

We’ll pay you between £55,000 and £85,000, depending on your specific skills and experience. You’ll be eligible for an on‑target bonus of 15%. We also offer plenty of green benefits and progressive policies to help you feel like you belong at OVO…and there’s flex pay. We'll give you 9% Flex Pay on top of your salary – 4% of this is auto‑enrolled into your pension, and the remaining 5% is yours to use for flexible benefits, adding to your pension or taking as cash.

Benefits taster:

• 34 days of holiday (including bank holidays)
• Health plans – healthcare cash plan or private medical insurance depending on your career level, critical illness cover, life assurance, health assessments, and more.
• Wellbeing – gym membership, travel insurance, workplace ISA, will writing services, dental insurance, and more.
• Lifestyle – extra holiday buying, discount dining, home & tech loans, and support for your favourite charities through give‑as‑you‑earn donations.
• Home – up to £400 towards an OVO Energy plan, plus discounts on solar, smart thermostats and EV chargers.
• Commute – great deals on ultra‑low emission car leasing, cycle‑to‑work scheme, and public transport season ticket loans.

To find better ways to support our people, we need to listen to each other’s experiences and find ways to build a truly inclusive and diverse workplace. As part of this, we have 8 Belonging Networks at OVO. Led by our people, for our people – so when you join OVO, you can play a part – big or small – with any of the Networks.

If you feel you have most of what we’re looking for but not every single thing, we encourage you to apply. We also allow you to let us know any additional requirements on the application form to make the process easy and comfortable.