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 full-stack with a backend focus) to join our cross-functional Logistics, Payment & Invoicing engineering team in Berlin.

Your mission

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

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

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

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

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Share knowledge with peers and support junior engineers when opportunities arise

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

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

Your profile

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

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

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

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

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

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You have excellent English communication and relationship-building skills