Backend Developer

Octopus Energy

4300

London (GB), United Kingdom

Posted on: 2025-10-30

Category: energy

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Employment type:

Full time

Experience required:

Intermediate

Salary

Salary not provided

About the company:

We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.

That means making power greener, smarter, and more affordable for everyone.

We put customers at the heart of everything we do: with always-fair prices, transparency and outrageous customer service.

We drive system change: with transformative tech to make renewable energy the norm and end global reliance on fossil fuels.

Octopus Energy Group is made up of 10 businesses spanning 6 countries across 3 continents, including: Octopus Energy Retail, Kraken Technologies, Octopus Energy Generation, Kraken Flex, Octopus Electric Vehicles, and the Octopus Centre for Net Zero. More on OEG @ octopusenergy.group

About Us

At Octopus we're passionate about powering a sustainable future. As pioneers in the renewable energy space, we don’t just invest in utility scale projects; we invest in people, communities and a greener tomorrow.

We're on a mission to transform the renewable energy generation space with consumers at the heart of everything we do. From producing our own green energy, which powers homes at discounted rates through our Fan Club to developing new investment models, our development team is passionate about challenging the status quo and making a positive impact for the community.

What you'll do

We’re looking for someone who enjoys getting stuck into the early stages of a project, who’s passionate about code, curious, and eager to learn. You’ll be one of the founding members of a new backend team that builds products for our Generation areas.

Your initial mission will be on a greenfield project in the renewable generation & financial space - suitable for someone who enjoys getting stuck in from the very beginning, being part of structural thinking and developing from the ground up. You’ll have the chance to make a huge impact and influence how the backend grows to meet new challenges, whilst working alongside talented engineers and supported by an experienced commercial & project team. Overall, it’s an exciting opportunity to work like a start-up within a global scaling EnTech business.

Our process usually takes up to 4 weeks, but we’ll always do our best to flex around what works for you. Along the way, you’ll chat with our recruitment team and your Recruiter will help you throughout different stages. Got any burning questions before then? Drop us a message at [email protected] and we’d love to help!

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.

What you'll need

The passion to create something functional, scalable and loved by customers - with the mindset to learn and grow with the company

Experience in the creation of the web service backend for a mobile or web app using Python/Django

A strong understanding of the Python ecosystem with 2+ years of experience

An ability to discuss vision and features within a team and propose creative solutions

An ability to write robust and fault-tolerant software

Knowledge of (or a desire to learn) GraphQL APIs is a plus

Experience of developing software in a regulated industry is a plus (e.g. banking, insurance, healthcare, investments)

Proficient understanding of Git

Familiarity with continuous integration and continuous deployment

💚 Why else you'll love it here

💰 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! We won best company to work for in 2022, on Glassdoor we were voted 50 best places to work in 2022 and our Group CEO, Greg has recorded a podcast about our culture and how we empower our people. We’ve also been placed in the top 10 companies for senior leadership

🎁 Visit our UK perks hub - Octopus Employee Benefits

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