Senior Full Stack Software Engineer

Octopus Energy; United Kingdom; On-site; GBP 60,000 - 90,000; Full time

Job summary

As a leading company in electric vehicle solutions, Octopus Energy is seeking a Senior Fullstack Software Engineer (Python & React) to revolutionize the electric car leasing industry. Join a team focused on delivering high-quality software and creating engaging user experiences while promoting a culture of learning and collaboration.

Benefits

Learning and development opportunities

Flexible salary discussions

Unique company culture

Qualifications

• Expertise in Python and React required.
• Proficiency in designing APIs using GraphQL.
• Experience collaborating within teams is essential.

Responsibilities

• Work within a cross-functional team on key products.
• Build APIs and integrate with services.
• Develop frontend applications for user engagement.

Skills

Python

React

GraphQL

APIs

Design principles

Team collaboration

Job description

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What we do. Electric Car Leasing Why we do it. Greener. Fairer. Future.

We’re looking for a Senior Fullstack Software Engineer (Python and React) to join our product and engineering team building the systems that power our ability to revolutionize the electric car leasing industry. Our tech stack includes Python with GraphQL, React, PostgreSQL, noSQL databases, running on AWS.

What you'll do...

1. Work within a dedicated cross-functional team on key products for our customers or internal teams.
2. Build APIs and integrate with our own and third-party services to optimise and automate processes.
3. Develop frontend applications to create engaging user experiences.
4. Create performant systems that work consistently across modern browsers and devices.
5. Care about the quality and maintainability of your code.
6. Contribute ideas, share knowledge, and help raise the skill level of your team.

What you'll need...

1. Expertise in Python and React.
2. Proficiency working with multiple data sources and designing expressive APIs using GraphQL.
3. Experience with design systems and component libraries.
4. Strong understanding of fundamental coding principles, best practices, and experience creating robust, scalable, maintainable software.
5. Proven experience collaborating within teams and taking ownership of feature development from inception to delivery.

Any of the following would be a bonus

1. Proficiency in TypeScript and additional technologies.
2. Knowledge of AWS and infrastructure as code (IaC) practices.
3. Experience with event-driven architecture/systems (EDA).

Why you'll love it here

• If you don’t meet all the criteria, that’s okay! We encourage you to apply anyway and have a conversation.
• Part of the Octopus Energy Group, awarded the Sunday Times best company to work for in 2024, and recognized by Tempo in 2025.
• Salary details are flexible and discussed during the interview process—what matters most is finding the right fit.
• Our culture is unique—focused on learning, autonomy, and innovative projects. We reward hard work with meaningful perks. Visit our perks hub for more.

About us

The electric revolution is here. From 2035, new petrol or diesel cars will no longer be sold in the UK. We’re making it easy for individuals and businesses to switch to electric with a seamless experience that includes car, charger, and energy solutions. Launched in 2018, Octopus Electric Vehicles aims to decarbonize and provide fair pricing and excellent customer experiences. As part of the Octopus Energy Group, we’re committed to transforming industries and improving lives. We use AI to assess applications fairly and objectively.

If this sounds like you, we’d love to hear from you. Need accommodations? Let us know, and we’ll do our best to support you. We encourage everyone, regardless of background, to apply—genuine, decent, honest, and empathetic people are what make us strong. We are an equal opportunity employer committed to fairness and inclusion.