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# Senior Software Engineer (BackEnd)

- **Company:** Octopus Energy Ltd
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Python (Programming Language), PostgreSQL, NoSQL, Next.js, Software Engineering, TypeScript, ReactJS, Backend, Event Driven Architecture, Build Management, Graphql, Front End Software Development, Api Design
- **Published:** September 17, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=0455f2997aa983a3

## About the Role

* Deep expertise in Python, with strong software engineering fundamentals.
 * Proven experience designing and building APIs, ideally using GraphQL.
 * Comfort working with multiple data sources, including relational (PostgreSQL) and NoSQL databases.
 * Excellent understanding of core software engineering principles and best practices, and a track record of applying them to build robust, scalable, maintainable systems.
 * Proven experience collaborating within teams and across disciplines.
 * Experience using AI tech and tooling to augment development
 * A track record of taking ownership of features from inception through to delivery., * Strong frontend experience with React, TypeScript, and Next.js, enough to engage with Full Stack engineering teams
 * Experience with event-driven architecture/systems (EDA)
 * Production experience with AI tech and tooling.

## Description

Work within a dedicated cross-functional team on key products for our customers and internal teams.

 * Design and build robust APIs, integrating our own and third-party services to optimise and automate core business processes.
 * Architect and evolve backend systems and data models that are performant, scalable, and built to last.
 * Work across multiple data sources, designing expressive, well-structured schemas.
 * Contribute to frontend applications when needed, helping shape experiences that work well for our users.
 * Care about the code you write and its long-term maintainability.
 * Contribute ideas, share knowledge, support, mentor, and raise the game of those around you.


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