Senior Frontend Engineer (m/w/d)

Octopus Energy

4300

Berlin (DE), USA

Posted on: 2026-04-29

Category: energy

Ready to make this your next chapter?

Let Octopus Energy know you found them on WorkInGreen. It helps more companies post climate jobs here.

Apply to job

Employment type:

Full time

Experience required:

Senior

Salary

Salary not provided

About the company:

We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.

That means making power greener, smarter, and more affordable for everyone.

We put customers at the heart of everything we do: with always-fair prices, transparency and outrageous customer service.

We drive system change: with transformative tech to make renewable energy the norm and end global reliance on fossil fuels.

Octopus Energy Group is made up of 10 businesses spanning 6 countries across 3 continents, including: Octopus Energy Retail, Kraken Technologies, Octopus Energy Generation, Kraken Flex, Octopus Electric Vehicles, and the Octopus Centre for Net Zero. More on OEG @ octopusenergy.group

Octopus Energy started in the UK with a bold idea: to become the first truly digital energy supplier.

With cutting-edge technology and amazing people who are passionate about customers and the energy transition, we succeeded and today we are one of the UK’s largest energy providers.

In 2020, we took the next step and expanded to Germany. Since then, we have been supplying customers here with electricity and gas – clean, fair, and transparent. Today, we serve over one million energy customers in Germany. At the same time, we are driving the green energy transition forward: from easy switching to heat pumps and smart meters to intelligent tariffs that make everyday life easier.

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.

If this sounds exciting, we’d love to chat. 💚

We are a great place to learn, work with talented engineers and have a lot of fun. Across Octopus, we're looking for genuinely decent people who are honest and empathetic. We are aware that some groups of people are less likely to apply to a role unless they meet 100% of the job requirements. Whoever you are, we encourage you to apply as you might just be the candidate we hire.

Our employees, with their unique skills and perspectives, are the driving force behind our success. As an equal opportunity employer, we celebrate diversity and commit to an inclusive work environment and fairness for everyone.

Are you ready for a career with us? We want to ensure you have all the tools and environment you need to unleash your potential. Need any specific accommodations? Whether you require specific accommodations or have a unique preference, let us know, and we'll do what we can to customise your interview process for comfort and maximum magic!

What You'll Have

Deep and profound experience with modern JS frameworks (Next.js, Remix, Vue, etc.)

Expertise in the architecture of scalable web applications using modern patterns (server-side rendering, server components, etc.)

Experience taking problems, rather than strict guidelines, and developing well fitting solutions, collaborating with others where necessary

A keen eye for and expertise in accessibility — it's an integral part of your workflow, not an afterthought

Clear thoughts on how to spend your time in the most impactful way. There’s always enough to do, but not everything is equally important

Excellent proactive communication skills with the ability to clearly articulate technical concepts to both technical and non-technical stakeholders

Conscious and responsible use of LLMs (Large Language Models) to assist with coding: you stay in control — AI is your tool, not the other way around

English (C1 or above): Required for day-to-day collaboration with international engineering teams, code reviews, technical documentation, and participation in cross-team discussions

German (C1 or above): Required for effective communication with local stakeholders and business partners

Nice to Have

Python knowledge — our language of choice in the backend

Experience in the energy sector

Experience in adjacent fields (Backend, Infrastructure, UX Design etc.)

Our Tech Stack

Frontend:

TypeScript

React & Next.js – hosted on Vercel

GraphQL

CSS-in-JS (currently PandaCSS)

Vitest, React Testing Library & Playwright

Monorepo structure

Backend:

Python (Django)

PostgreSQL

GraphQL

Perks and Benefits

Monthly public transport subsidy

Monthly lunch allowance

Discounted bike leasing

Company pension plan

Share options from Octopus Energy Group Ltd.

Advice and support for childcare via HeyNanny

Monthly childcare allowance

Parental leave bonus: We top up your parental allowance for 3 months so you can enjoy your parental leave more comfortably

Subsidies for fitness programs via Wellpass

Support for your mental well-being with our partner Open Up

Attractive training and career development opportunities

Free language courses via Busuu

Your further development is important to us, which is why we oﬀer you:

Regular in-house tech talks

Participation in conferences, meet-ups and trade fairs

Reading and discussing tech books in our book club

Possibilities to explore other domains that aren’t directly related to your day to day work

Energy jobs More climate jobs in USA

2951 Energy jobs

Not quite the right fit? Keep looking.

More climate roles that match your skills and values.

Full time

Octopus Energy

4300

Full time

Energy