Backend Developer

We believe energy should be better - for you and the environment.   Octopus Energy is a leading energy technology ( En Tech) company, committed to providing a better, fairer, and more transparent experience for our customers. Our dedication goes beyond just service: we make real, long-term investments in renewable energy to build a low-carbon future. By keeping energy green, flexible, and fairly priced, we’re helping consumers take control of their energy usage. Our mission is simple: make energy greener, fairer, and genuinely better for people. Backed by Generation, the sustainable fund co-chaired by Al Gore, we are driving a global energy revolution. To achieve this, we’re looking for outstanding technical minds who are eager to use their skills to tackle one of the biggest challenges facing our planet. We’re proud to be Europe's best-funded green tech start-up, and one of Glassdoor's Best Places to Work. We’re also the most awarded energy supplier in the UK, and have been Which? Recommended seven years running.

What will you be doing?



• Octopus Energy Engineering is responsible for the sites, services, and tariffs that are used by the millions of Octopus Energy customers worldwide. From building the latest, cutting-edge time-of-use tariffs, to helping customers actually enjoy tasks like providing meter readings through our wheel of fortune - and everything in between.


• You’ll find a wide variety of challenges in the work we do as we help push the energy revolution forward. Our teams are multi-disciplined and collaborate between countries, meaning you have what you need to get the right people together and build the next great thing.


• Octopus Energy is growing rapidly, and the Octopus Energy Engineering team is at the forefront of this expansion. We are looking for a Backend Developer who will work closely with Octopus Energy UK and various teams, focusing on the development and integration of new features for the website and mobile app.  


• The role involves working on different modules, including the private area, bill management and , contributing to customer onboarding optimization and the implementation of marketing projects through dashboards and the personal area.


• The team is driven by the mission of creating a direct impact on customers in everything it does, meaning priorities do sometimes change, but the pace and resulting feedback cycle is satisfyingly quick, and consistently so too.


• We embrace flat hierarchies and an open, agile culture that fosters innovation, flexibility, and creativity.  


• We don’t hang our personalities up with our coats and nor should you. At Octopus, we hire great people who get stuff done, all whilst being themselves.


What you'll need



• We're looking for someone with a general interest in technology and problem-solving; someone diligent and thoughtful. It would be helpful to have experience in the following (in rough priority order):


• Python


• Django (or equiv. web framework)


• Domain modelling


• GraphQL and REST AP Is


• Writing robust and fault-tolerant software


• Celery and async processing


• Postgres


• Plus experience in the following would be a bonus:


• AWS


• Terraform, Packer, Consul


• React and


What else you'll love about us



• Octopus Energy 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!


• Flexible working environment - genuine work life balance here, we treat you as a human, and do our best to make work and life merge smoothly together.


• Equity Options Scheme - you own your own part of the business, share options in the whole Octopus Energy Group so we all work together towards success.


• Office culture - have a certain tech requirement? We’ll do our best to get it. Weekly on a Friday we all get together (this happens virtually too) for company updates and drinks - we call it Family Dinner.


• Your development is important - we support and help with development including internal and external courses, learning, study support etc, all bespoke to you.