Senior Backend Developer

We believe energy should be better - for you and the environment. Octopus Energy is a leading energy technology (EnTech) 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 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, one of Glassdoor's Best Places to Work, and the most awarded energy supplier in the UK, recognized by Which? for seven consecutive years.

What will you be doing?

• Octopus Energy Engineering is responsible for the sites, services, and tariffs used by millions of Octopus Energy customers worldwide. This includes building innovative time-of-use tariffs and engaging customer experiences like providing meter readings through interactive tools.
• You’ll encounter a variety of challenges as we push the energy revolution forward. Our multidisciplinary teams collaborate across countries, providing the resources needed to build impactful solutions.
• We are expanding rapidly, and the Octopus Energy Engineering team is at the forefront. We are seeking a Backend Developer to work closely with UK teams and others, focusing on developing and integrating new website and mobile app features.
• The role involves working on modules such as the private area, bill management, customer onboarding, and marketing dashboards.
• Our team is driven by the mission to make a direct impact on customers, with a fast-paced environment that values quick feedback and adaptability.
• We foster a flat hierarchy and an open, agile culture that encourages innovation, flexibility, and creativity.
• At Octopus, we value authenticity and collaboration—great ideas come from open conversations and teamwork.

What you'll need

• An interest in technology and problem-solving, combined with diligence and thoughtfulness.
• Experience or expertise in the following areas (in rough priority):
• Python
• Django or equivalent web frameworks
• GraphQL and REST APIs
• Writing robust and fault-tolerant software
• Celery and asynchronous processing

Plus experience in the following would be a bonus:

• Terraform, Packer, Consul
• React

What else you'll love about us

• Our unique culture promotes quick learning, decision-making, and innovation, with autonomy and ownership on meaningful projects.
• Flexible working arrangements to support work-life balance.
• Equity options so you can share in the company's success.
• An inclusive office culture with regular company updates and social events, both in person and virtually.
• Support for your personal development through courses, training, and study support.

Senior Backend Developer • Valencia, ESP