Senior Backend Engineer

Senior Backend Engineer – Flexibility Team

We are looking for a Senior Backend Engineer to join our Flexibility team, which builds the next generation of products and tools to make energy more flexible. This includes our flagship Intelligent Octopus product that automates demand shift for hundreds of thousands of customers, saving millions of pounds and managing large grid‑scale batteries. The role involves designing, building, and operating large‑scale, secure, and high‑transaction systems in cloud environments.

• 5+ years of professional experience in backend web application development
• Hands‑on experience with Python/Django or equivalent web frameworks
• Strong systems design abilities, including microservices architecture
• Experience designing and operating RDBMS (e.g., PostgreSQL, MySQL)
• Experience with secure, reliable, large‑scale/high‑transaction systems
• Experience developing and operating systems in cloud environments (AWS, GCP, or Azure)
• A self‑sufficient person with a high level of initiative, able to work autonomously in a fast‑changing environment
• A strong team player who collaborates across teams and departments, mentoring and coaching more junior developers
• Someone excited to solve social challenges through technology
• Interest in environmental issues and the energy industry

• Python, Django or equivalent web framework
• Domain modelling
• Designing distributed systems, improving service reliability, and shaping long‑term architectural strategy
• HTTP and REST APIs, GraphQL and other API technologies
• Writing robust and fault‑tolerant software
• Celery and async processing
• PostgreSQL
• Bonus: AWS, Terraform, Packer, Consul