Senior Software Engineer (BackEnd) at Octopus Energy Group in London (GB)
- Company: Octopus Energy Group
- Location: London (GB)
- Posted: Sep 18, 2026
- Type: Full-Time
- Experience: 6+ years
Overview
Why we do it. Greener. Fairer. Future. 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.
Job description
- Why we do it. Greener. Fairer. Future.
- 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.
Responsibilities
- 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.
Requirements
- 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.
- 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.
Skills
Required
- Python
- GraphQL
- PostgreSQL
- NoSQL databases
- AWS
- Software engineering principles
- API design
- Collaboration
- AI tech and tooling
Preferred
- React
- TypeScript
- Next.js
- Event-driven architecture (EDA)
- Production AI experience
Benefits
- Don't feel like you meet all of our hiring criteria? Thats OK, apply anyway! We'd love to hear from you and have a conversation.
- Octopus Electric Vehicles, part of the Octopus Energy Group, won the Sunday Times best company to work for in 2024. We were named 6th out of the top 100 start-ups to work for by Tempo in 2025 and on Glassdoor we were voted 50 best places to work in 2022. Our Group CEO, Greg has recorded a podcast about our culture and 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 a unique 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
About Octopus Energy Group
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.