Senior Frontend Software Engineer (m/f/x)

We are looking for a Senior Frontend Engineer to join one of our Customer – Facing teams that owns rebuy.de, the digital heart of our sustainable electronics mission.

As our new teammate, you’ll take ownership of building and improving user-facing features with Angular, shaping a user experience that’s fast, accessible, and scalable.

You’ll collaborate closely with product, design, and backend engineers, influence architecture, and drive best practices, while mentoring teammates and raising the technical bar. Your work will have a direct impact on how customers engage with our mission of sustainable technology.

You\’ll have the unique opportunity to touch both frontend and backend technologies: primarily working with Angular on the frontend side, while also developing backend skills with PHP, Java and Kotlin when needed.

Ready to become part of the most important mission on this planet? We are rebuy, pioneers in the sustainable reuse of electronics and media, and we are looking for you! Our mission: to make circular living accessible to all, one transaction at a time. By giving products a second chance, we reduce resource consumption and avoid unnecessary e-waste.

Our team of 600 comes from all corners of the world; we drive things forward collaboratively, take personal responsibility, value positive critical thinking, and persistently serve our customers and planet.

Key Responsibilities:

• Drive frontend development of customer-facing features on rebuy.de, focusing on Angular, with occasional opportunities for cross-stack collaboration (PHP/Symfony, Kotlin)

• Drive technical decisions on architecture, performance, and scalability for the frontend

• Deliver high-quality, maintainable code, ensuring adherence to best practices and standards

• Review and mentor: provide constructive feedback in code reviews and support the growth of other engineers

• Collaborate cross-functionally with product managers, UX/UI designers, and backend engineers

• Ensure reliability by troubleshooting complex issues and guiding the team toward effective solutions

• Promote best practices in testing, CI/CD, and documentation to raise the team’s engineering standards

• Contribute strategically by bringing insights and ideas that improve the customer journey and align with our sustainability mission

• 5+ years of professional experience in software development, with a strong focus on frontend engineering

• Advanced proficiency in TypeScript, Angular, and CSS, with a proven track record of delivering complex, high-quality frontend applications using modern frameworks and tooling

• Deep understanding of web architecture and fundamentals (HTTP, REST APIs, authentication, state management) and their application at scale

• Expertise across the full software development lifecycle: from design and implementation to testing, deployment, monitoring

• Strong advocate for clean, maintainable code, test-driven development, and agile engineering practices, setting the standard for the team

• Excellent communication skills in English, with experience writing technical documentation and influencing technical discussions in a team and beyond

• Proven ability to solve complex technical challenges and make sound architectural decisions

• Recognized for effective cross-functional collaboration with engineers, designers, and product stakeholders

Nice to have:

• Experience with performance optimization and accessibility in frontend applications

• Contributions to open-source projects or active participation in the engineering community

• Experience in mentoring, technical leadership, or team scaling

• Exposure to A/B testing and data-driven product development

• Familiarity with PHP/Symfony or Kotlin and Java services to collaborate effectively with backend teams

Working hours:

• Full time

Location:

• Berlin / Poznań

• Hybrid model

Purpose, a great company culture and incredible benefits – what to expect at rebuy:

• Work with a friendly team that is passionate about circularity and wants to make the world a little more sustainable, one transaction at a time

• Feel comfortable in an environment where independence and new ideas are welcome

• Benefit from flat hierarchies and the greatest possible transparency so that things don\’t take longer than they have to and you always feel well informed

• Enjoy our centrally located office in Berlin (Erkelenzdamm 11–13, 10999 Berlin) or join us from our Poznań, Poland location.

• Benefit from our family-friendly, flexible environment and paid child sick leave

• Bring your dog to the office: we love animals and want to cuddle yours, too!

• Use employee discounts on rebuy.de, sustainable products at Futurebens, offers for sustainable micro-mobility and massages directly in our office

• Have fun at our legendary team and company events

• Use our mental health offers as part of a cooperation with nilo

• Take care of your work-life balance with 30 vacation days

*At rebuy all people are welcome and supported! We would like to talk, regardless of age, disability, national and social origin, skin color, religion, gender identity and sexual orientation. Just be who you are.