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About the Role

Octopus Energy is seeking a Backend Engineer II to join their Devices team. This role involves extending and improving integrations for existing and new devices within the Octopus Energy app, contributing to the company's mission of accelerating the green energy transition by scaling low-carbon technology in homes.

Responsibilities

• Take independent ownership of medium-sized technical features and components, delivering stable and production-ready code with minimal supervision.
• Ship continuously to trunk with small PRs and fast feedback.
• Build and extend a Django backend serving multiple countries from a single codebase.
• Integrate with upstream platform services (Kraken Customer, Kraken Field, Kraken Flex) for billing, CRM, auth, and device control.
• Proactively identify and address monitoring, alerting, and observability gaps.
• Engage confidently in feature technical designs, participate actively in code reviews, and provide clear documentation.
• Use systematic, structured approaches to resolve bugs or service blockers.
• Confidently step in to address incident management within your core domain.

Requirements

• Solid backend foundations with a 3-4 year track record building web applications in Python, ideally with Django.
• Experience writing highly testable code (unit, integration, and functional tests run in parallel in CI).
• Experience working with relational databases and background task processing.
• Comfortable working in a large, multi-tenant codebase, navigating and extending shared abstractions, territory-specific behaviour, and integrations with upstream services.
• Comfortable with pace over process, shipping continuously.
• Openness and excitement around integrating modern AI tools into daily development, testing, and debugging.
• High initiative - able to break down engineering problems into shippable slices and make steady progress.
• A genuine curiosity about smart energy devices and the technology that connects them to people's homes.
• Coachable - genuinely interested in feedback and willing to adapt your approach.

Skills

• Python
• Django
• PostgreSQL
• Celery
• Asynchronous background processing
• API architectures
• GraphQL
• REST
• HTTP
• Domain modelling
• Writing fault-tolerant systems
• Test-driven development (TDD)
• TypeScript
• AWS Lambda
• CDK
• DynamoDB
• Event-driven microservices
• API Gateway
• Distributed architecture
• Scaling across services

Location

• London
• Remote (UK)

Work Type

• Full-time

Experience Level

• Mid-level

About the Company

• Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier.
• By combining world-class tech with brilliant humans who care deeply about customers and driving the renewable energy transition, we made it happen and in 2025, we became Britain’s largest energy supplier.
• Now, we’re scaling fast and building the next generation of products to accelerate the green energy transition.
• From making it effortless to switch to heat pumps, solar and EVs, to launching smart tariffs and creating renewable generation at scale, we’re solving some of the most complex challenges in energy with speed, creativity and customer obsession.
• We’re also enabling our global businesses to reach the full capability of what we’ve achieved in the UK, taking the learnings, products and experiences that customers love here and rolling them out worldwide.
• At Octopus Tech, you’ll have real ownership, variety, and the chance to shape products that make a tangible difference in people’s lives - lowering bills, enabling greener living, and delivering experiences customers genuinely love.
• You’ll work side by side with teams across marketing, operations, and data, and see the impact of your work in the real world, fast.
• 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.

Equal Opportunity

• 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.
• 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.