Senior Software Engineer (Python)

Octopus Energy Group; Brighton; On-site; GBP 85,000 - 110,000; Full time

Job summary

Octopus Energy Group is seeking a Senior Software Engineer (Python) to join our product and engineering team. You will design and build robust APIs, evolve backend systems, and work with multiple data sources to deliver scalable solutions.

You may contribute to frontend work to enhance user experiences and mentor teammates. The role emphasises ownership from inception to delivery, collaboration across disciplines, and applying AI tooling to improve development workflows.

Qualifications

• Deep expertise in Python and strong software engineering fundamentals.
• Experience designing APIs, ideally with GraphQL.
• Experience with relational (PostgreSQL) and NoSQL databases.
• Solid understanding of CS fundamentals and scalable backend design.
• Proven collaboration within cross-functional teams.
• Experience using AI tech/tools to augment development.
• Ownership of features from inception to delivery.

Responsibilities

• Design and build robust APIs, integrating services to automate core processes.
• Architect and evolve backend systems and data models for performance and scalability.
• Work across multiple data sources, designing expressive schemas.
• Contribute to frontend applications when needed to shape user experiences.
• Care about code maintainability and long-term quality.
• Contribute ideas, share knowledge, mentor colleagues.

Skills

Python

API design

GraphQL

Data modeling

Team collaboration

AI tooling

Ownership

Tools

AWS

React

Next.js

PostgreSQL

NoSQL

Job description

We’re looking for a Senior Software Engineer (Python) to join our product and engineering team building the systems that power our ability to revolutionise the electric car leasing industry.

Our tech stack is Python with GraphQL, PostgreSQL and NoSQL databases, running on AWS, with a React/Next.js frontend.

Our tech stack is Python with GraphQL, PostgreSQL and NoSQL databases, running on AWS, with a React/Next.js frontend.

What you'll do...

Work within a dedicated cross-functional team on key products for our customers and internal teams.

• Design and build robust APIs, integrating our own and third‑party services to optimise and automate core business processes
• Architect and evolve backend systems and data models that are performant, scalable, and built to last.
• Work across multiple data sources, designing expressive, well‑structured schemas.
• Contribute to frontend applications when needed, helping shape experiences that work well for our users.
• Care about the code you write and its long‑term maintainability.
• Contribute ideas, share knowledge, support, mentor, and raise the game of those around you

What you'll need...

• Deep expertise in Python, with strong software engineering fundamentals.
• Proven experience designing and building APIs, ideally using GraphQL.
• Comfort working with multiple data sources, including relational (PostgreSQL) and NoSQL databases.
• Excellent understanding of core software engineering principles and best practices, and a track record of applying them to build robust, scalable, maintainable systems.
• Proven experience collaborating within teams and across disciplines.
• Experience using AI tech and tooling to augment development
• A track record of taking ownership of features from inception through to delivery.

Any of the following would be a bonus

• Strong frontend experience with React, TypeScript, and Next.js, enough to engage with Full Stack engineering teams
• Experience with event‑driven architecture/systems (EDA)
• Production experience with AI tech and tooling

Why you'll love it here

• Octopus Electric Vehicles, part of the Octopus Energy Group, won the Sunday Times best company to work for in 2024. We were named6th out of the top 100 start‑upsto work for by Tempo in 2025 and on Glassdoor we were voted50 best places to work in 2022. Our Group CEO, Greg has recordeda podcast about our cultureand how we empower our people
• Wondering what the salary for this role is? Just ask us! On a call with one of our recruiters it's something we always cover as we genuinely want to match your experience with the correct salary. The reason why we don't advertise is because we honestly have a degree of flexibility and would never want salary to be a reason why someone doesn't apply to Octopus - what's more important to us is finding the right octofit!
• Octopus Energy Group is aunique culture. An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co‑owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about! Visit our perks hub -Octopus Employee Benefits

Things to Note...

• just to let you know, we are dog friendly company so you may see our 4 legged friends in the offices - feel free to bring yours! Rest assured though, we've taken lots of precautions for those who have allergies
• We use AI to help us assess applications fairly and objectively. We’re totally fine with you using AI as a tool to help prepare too. That said, when we get to the interview and assessment stage, we’re really interested in hearing your unique perspective and real‑world stories. That’s the stuff we can’t get from a bot or a prompt!

About us

The electric revolution has arrived - and from 2035 you’ll no longer be able to buy a new petrol or diesel car in the UK.

We’re building a whole new way for drivers to join the electric charge and not only learn about and shop for their EV online, but experience a 'lease for life' through an industry changing customer experience. This is the chance to join one of the UK’s most exciting start‑ups – making it easy for individuals and businesses to go electric by getting their car, charger and energy all in one cracking deal.

Octopus Electric Vehicles launched in 2018 to make it seamless to switch to cleaner, greener driving. Our mission is to drive sustainable change, decarbonise the planet and provide our customers with fair pricing and a fantastic experience.

We're an Octopus Energy company—an innovative new energy supplier. We are part of the Octopus Energy Group, which seeks to improve the lives of millions of people by transforming the industries we operate in. The Octopus Group incorporates Octopus Energy, Octopus Healthcare, Octopus Investments, Octopus Property, Octopus Ventures and Octopus Labs.

If this sounds like you then we'd love to hear from you.

Are you ready for a career with us? We want to ensure you have all the tools and environment you need to unleash your potential. Need any specific accommodations? Whether you require specific accommodations or have a unique preference, let us know, and we'll do what we can to customise your interview process for comfort and maximum magic!

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

Where necessary, we sometimes use AI tools to help with parts of our hiring process, like reviewing applications or assessing responses. We’re lucky to receive a huge amount of interest, so these tools help our recruiters manage that volume, not replace them. Ultimately, every hiring decision (for example, whether to progress your application or not) is always made by a real person in our Talent team.

If you’d like to know more about how we use your data, you can reach out to us via email at [e-mail]. We’re happy to help!