Backend Engineer (f/m/x)

CarOnSale is a start-up in the heart of Berlin. As a tech company, we have made it our mission to revolutionise the automotive trade across Europe. Join us on this exciting, fast-paced and high-growth journey as we develop innovative and class-leading solutions for the B2B sector.

We are looking for a motivated and ambitious Backend Engineer to join our cross-functional Logistics, Payment & Invoicing engineering team in Berlin.

Your mission

• Collaborate closely with product and design to ship impactful features and improvements

• Take ownership of backend tasks and services, from ideation to deployment and maintenance

• Write clean, maintainable, and well-tested code with an eye for performance and reliability

• Participate actively in team discussions, technical planning, and agile ceremonies

• Share knowledge with peers and support junior engineers when opportunities arise

• Learn from more senior teammates and grow your technical and product understanding

• Contribute to our backend systems and help us improve integrations with external services like payment providers (e.g., Stripe)

Your profile

• You have at least 4+ years of hands-on experience in backend engineering roles

• You’re comfortable working in a team-oriented environment and collaborating across teams

• You write TypeScript fluently and have worked with technologies such as Node.js, NestJS, and PostgreSQL

• You’re familiar with agile practices like Scrum or Kanban, and tools like Jira and Confluence

• You’re proactive, curious, and enjoy taking ownership of your work

• You have excellent English communication and relationship-building skills

Why CarOnSale?

• Make Your Mark: Influence product and company direction from the very start—we value your perspective and give you the autonomy to act on it.
• Personal & Professional Growth: Enjoy tailored onboarding, ongoing feedback, and access to coaching and development programs that support your career at every stage.
• Tools of Your Choice: Mac or Windows? Your preferred setup and all the tech you need is yours.
• Exceptional Team Spirit: Get inspired by ambitious colleagues, take part in regular team events, and enjoy a truly supportive, positive work culture. We call it being a “COSie.”
• Diversity & Inclusion: We celebrate unique perspectives and experiences. Everyone is welcome, and everyone belongs.