Application Guide
How to Apply for Senior Full Stack Software Engineer
at Octopus Energy
🏢 About Octopus Energy
Octopus Energy is a UK-based energy supplier that’s disrupting the traditional market with a focus on transparency, AI-driven efficiency, and 100% renewable electricity. Their unique tech-forward culture and commitment to a low-CO2 future make them an exciting place for engineers who want to use their skills for environmental impact.
About This Role
As a Senior Full Stack Software Engineer, you’ll work in a cross-functional team to build customer-facing and internal products, from APIs to frontend UIs. Your work directly contributes to automating energy processes and creating seamless user experiences, helping Octopus scale its green mission.
💡 A Day in the Life
You’ll start with a stand-up with your cross-functional team, then dive into coding—maybe building a new GraphQL endpoint for customer data or refining a React component. After lunch, you might pair with a product manager to refine a feature spec, then review pull requests before wrapping up with a retrospective on sprint progress.
🚀 Application Tools
🎯 Who Octopus Energy Is Looking For
- Deep expertise in Python and React, with a portfolio showing production-level full-stack applications.
- Strong GraphQL skills—you can design expressive APIs and integrate multiple data sources efficiently.
- Experience with design systems and component libraries (e.g., Storybook, Material-UI) to maintain consistent UI/UX.
- Proven ability to take ownership of features end-to-end, collaborate across disciplines, and champion code quality and maintainability.
📝 Tips for Applying to Octopus Energy
Highlight any experience with energy or sustainability projects—Octopus values mission alignment.
Showcase your GraphQL work: include a link to a public API or repo where you designed schema and resolvers.
Mention specific Python frameworks (e.g., Django, FastAPI) and React patterns (hooks, context) you’ve used in production.
Tailor your resume to emphasize cross-functional collaboration and feature ownership, not just technical skills.
Research Octopus’s tech stack and open-source contributions (e.g., Kraken, their platform) and mention how your skills fit.
✉️ What to Emphasize in Your Cover Letter
Emphasize your passion for renewable energy and transparency, your experience building scalable full-stack systems with Python and React, and your ability to own features from ideation to deployment. Also highlight your collaborative mindset and commitment to code quality.
Generate Cover Letter →🔍 Research Before Applying
To stand out, make sure you've researched:
- → Read Octopus Energy’s blog and engineering posts to understand their culture and tech challenges.
- → Explore their open-source projects on GitHub, especially Kraken and OctoPrint integrations.
- → Understand their product: smart meters, renewable tariffs, and how they use AI for customer service.
- → Check recent news about Octopus’s expansion or sustainability initiatives to show informed interest.
💬 Prepare for These Interview Topics
Based on this role, you may be asked about:
⚠️ Common Mistakes to Avoid
- Don’t submit a generic resume—Octopus looks for passion and specificity; tailor every bullet point.
- Avoid overemphasizing legacy tech (e.g., jQuery) without showing modern stack proficiency (React, GraphQL).
- Don’t neglect the mission: failing to mention interest in climate or energy could signal misfit.
📅 Application Timeline
This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.
Typical hiring timeline:
Application Review
1-2 weeks
Initial Screening
Phone call or written assessment
Interviews
1-2 rounds, usually virtual
Offer
Congratulations!
Ready to Apply?
Good luck with your application to Octopus Energy !