Senior Frontend Engineer (m/w/d)

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. 💚 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

TypeScript

React & Next.js – hosted on Vercel

GraphQL

CSS-in-JS (currently PandaCSS)

Vitest, React Testing Library & Playwright

Monorepo structure

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

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