Backend Engineer

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

At Octopus Energy, we’re not your typical utility company. We’re a team of passionate people working every day to make energy 100% renewable, accessible, and fair for everyone.

We believe technology and innovation are key drivers of change. Our mission is to transform the way the world consumes energy breaking down barriers, simplifying processes, and delivering a more human and transparent service.

That’s why our commitment is clear: clean energy should be the norm, not the exception. To achieve this, we combine sustainability with a people-first approach, delivering outstanding service and building a team that shares our vision.

💡 But none of this would be possible without people like you. To keep growing and transforming the energy sector, we’re looking for talent that wants to make a real difference. If you want to be part of this change, bring your energy, and help build a greener future, we want to meet you!!

 

If you're excited about building a more sustainable future with us, we’d love to hear from you!

📎 Send us your CV, and if your profile fits, we’ll be in touch.

The Octopus Energy Engineering team is responsible for the sites, services, and tariffs used by millions of customers worldwide. From building cutting-edge time-of-use tariffs to gamifying user experiences, we tackle a wide variety of exciting challenges to push the energy revolution forward.

Our teams are multi-disciplined and collaborate internationally, meaning you'll have the support and resources to collaborate with top-tier talent and deliver high-impact global solutions.

⚙️ As a Backend Engineer in this team, you will:

• Collaborate internationally: Work closely with Octopus Energy ES and various global teams to develop and integrate new features for our website and mobile app.

• Own key product modules: Contribute directly to the private area, bill management, saving sessions, customer onboarding optimization, and marketing dashboards.

• Drive fast-paced impact: Deliver code that directly impacts customers. Our priorities adapt to real-world needs, meaning the pace is fast and the feedback cycle is satisfyingly quick.

• Thrive in an agile culture: Enjoy flat hierarchies and an open environment that fosters innovation, flexibility, and creativity.

💡 Come as you are: At Octopus, we believe that diverse teams build better products. We foster an open, collaborative environment where authentic communication and mutual support are key. If you love to connect, share ideas, and solve complex problems alongside a supportive team, you'll fit right in.

Fluent spoken English is absolutely essential 🇬🇧. The team is international, so English will be the language you use on a daily basis.

On the technical side, you should have:

• Strong professional experience building backend applications with Python.

• Solid experience with Django (or equivalent robust web frameworks).

• Deep understanding of Domain Modelling and software architecture.

• Strong expertise designing and integrating GraphQL & REST APIs.

• Proven experience writing robust, fault-tolerant, and scalable software.

• Experience with Celery and asynchronous task processing.

• Solid handling of relational databases, especially PostgreSQL.

• Strong problem-solving skills and the ability to lead complex issues from concept to production.

🧲 Nice to have:

•  
• Experience with cloud platforms and infrastructure (AWS, Terraform, Packer, or Consul).
• Familiarity or exposure to frontend technologies such as React and Next.js.
• Familiarity with logging and metric aggregation platforms (DataDog).

✨ Perks: