Frontend Engineer II

Octopus Energy Group; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

Octopus Energy Group is seeking a Frontend Engineer II to join our Accounts team. You’ll work with a stack that includes React, TypeScript (desirable), Next.js on Vercel (desirable), and GraphQL.

The role focuses on building scalable, accessible web experiences for our customers and business clients. You’ll collaborate across marketing, operations, and data to ship features that drive the green energy transition and improve the user experience.

Qualifications

• 3+ years of experience with modern frontend tech stack.
• Ability to build accessible, scalable web experiences.
• Experience delivering high-traffic websites with performance in mind.

Responsibilities

• Own frontend features from concept to production.
• Collaborate with marketing, operations, and data teams to deliver user-focused experiences.
• Ensure accessibility and performance across the product surfaces.

Skills

Frontend development

Accessibility

Performance optimization

Web testing

Tools

React

TypeScript

Next.js

GraphQL

React Testing Library

Playwright

Job description

Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier.

By combining world-class tech with brilliant humans who care deeply about customers and driving the renewable energy transition, we made it happen and in 2025, we became Britain’s largest energy supplier.

Now, we’re scaling fast and building the next generation of products to accelerate the green energy transition. From making it effortless to switch to heat pumps, solar and EVs, to launching smart tariffs and creating renewable generation at scale, we’re solving some of the most complex challenges in energy with speed, creativity and customer obsession. We’re also enabling our global businesses to reach the full capability of what we’ve achieved in the UK, taking the learnings, products and experiences that customers love here and rolling them out worldwide.

At Octopus Tech, you’ll have real ownership, variety, and the chance to shape products that make a tangible difference in people’s lives - lowering bills, enabling greener living, and delivering experiences customers genuinely love. You’ll work side by side with teams across marketing, operations, and data, and see the impact of your work in the real world, fast.

We are looking for a Frontend Engineer II to join our Accounts team, and our Business team.

Octopus Energy for Business are the business energy champions. Success for OEB comes down to our ability to look after our customers, whilst furthering the transition to Net Zero. To achieve this we must deliver market leading green products, outstanding customer service and competitive pricing. Businesses have a fundamental role to play in grid decarbonisation, which OEB can support them to unlock.

Our local business teams support a diverse range of business customers, from over 110,000 SMEs in the UK to major cities and local authorities in France, and we are rapidly scaling. Growth to date is based on disruption and innovation. Testing and rolling out smart products, customer propositions and initiatives. We have ambitious growth plans for our business teams in all the countries we operate in.

The Accounts team builds the fundamental digital core of the Octopus Energy customer experience. They are responsible for modernising payment structures and facilitating seamless self-serve journeys, including billing, statement management, renewing and amending tariffs and many more. By creating effortless and accessible web experiences, the team ensures our energy specialists are freed up to support the vulnerable customers who need it most, making our industry-leading customer service possible.

We embrace flat hierarchies and an open, agile culture that fosters innovation, flexibility, and creativity.

We don’t hang our personalities up with our coats and nor should you. At Octopus, we hire great people who get stuff done, all whilst being themselves.

What you’ll have…

• 3+ years of experience with our stack, listed below
• Experience taking problems, rather than strict guidelines, and developing strong solutions
• Confidence owning the development cycle (request, requirements gathering, technical proposal, technical execution, deployment and monitoring.)
• Confidence tackling large-scale tasks individually
• An empathetic approach to delegating work and collaborating with others
• The ability to develop websites that meet strong accessibility guidelines
• Experience building scalable, performant sites that handle high levels of traffic well

Our stack…

• React
• TypeScript (desirable)
• Next.js on Vercel (desirable)
• GraphQL w/ Apollo (desirable)
• React Testing Library & Playwright

Why else you’ll love it here…

• Octopus Energy Group is a unique culture. An organisation where people learn, decide, and build quicker. Where people work with autonomy, alongside a wide range of amazing co-owners, on projects that break new ground. We want your hard work to be rewarded with perks you actually care about! We won best company to work for in 2022, on Glassdoor we were voted 50 best places to work in 2022 and our Group CEO, Greg has recorded a podcast about our culture and how we empower our people. We’ve also been placed in the top 10 companies for senior leadership
• Visit our UK perks hub - Octopus Employee Benefits

Our process usually takes up to 4 weeks, but we’ll always do our best to flex around what works for you. Along the way, you’ll chat with our recruitment team and your Recruiter will help you throughout different stages.

As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.

Studies have shown that some groups of people, like women, are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, if you like one of our jobs, we encourage you to apply as you might just be the candidate we hire. Across Octopus, we’re looking for genuinely decent people who are honest and empathetic. Our people are our strongest asset and the unique skills and perspectives people bring to the team are the driving force of our success. As an equal opportunity employer, we do not discriminate on the basis of any protected attribute. Our commitment is to provide equal opportunities, an inclusive work environment, and fairness for everyone.