Fullstack Engineer (with Backend focus) (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 engineer (either backend, or fullstack with a backend focus) 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 2+ 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

• Nice to have: You’ve had some exposure to payment systems (like Stripe)