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 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 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!