Senior Backend Engineer (f/m/x)

<div data-testid="markdown-response"> <div data-testid="markdown-response"> <div> <h3>Senior Backend Engineer – Logistics, Payment &amp; Invoicing (Berlin)</h3> </div> </div> <div data-testid="markdown-response"> <div> <p id="message">We’re CarOnSale—a Berlin-based startup on a mission to shake up automotive trading across Europe. We’re growing fast, building some seriously cool stuff, and we want you to help us create next-level B2B solutions with real impact.</p> </div> </div> <div data-testid="markdown-response"> <div><hr></div> </div> <div data-testid="markdown-response"> <div> <h4>Here’s what we’re hoping you’ll do with us:</h4> </div> </div> <div data-testid="markdown-response"> <div> <ul> <li><strong>Build What Matters:</strong> Work super closely with product and design so we ship stuff that makes a real difference for our customers (and for the whole business).</li> <li><strong>Think Big, Build to Last:</strong> Take the lead on designing and running backend systems. Distributed? High-volume? Need to scale or evolve? You’re the expert who makes it work (and keeps it working).</li> <li><strong>Set the Bar High:</strong> Clean code, solid tests, systems that don’t go down in a stiff breeze—we want you to set the standards and keep us honest. Lead the tough architectural reviews, too!</li> <li><strong>Let the Data Speak:</strong> You care if features <em>really</em> deliver. So you measure, you learn, you iterate—and you insist we don’t stop until we see results.</li> <li><strong>Mentor, Teach, Repeat:</strong> Help others get better. Review code, guide junior folks, set the example for learning &amp; ownership. Don’t just help the team—<em>level up</em> the team.</li> <li><strong>From Idea to Production (&amp; Beyond):</strong> Own your work, front to back. Ideate, design, launch, monitor—and fix/improve what’s needed. No unfinished business left in the backlog!</li> <li><strong>Make Us Sharper:</strong> Bring better processes, contribute in planning, doc, testing, incident retros—you see something broken or slow, you fix it!</li> <li><strong>Plug Us In:</strong> Build slick, safe integrations (like with Stripe and friends)—our backend should play nicely with the whole ecosystem.</li> </ul> </div> </div> <div data-testid="markdown-response"> <div>&nbsp;</div> </div> <div data-testid="markdown-response"> <div><hr></div> </div> <div data-testid="markdown-response"> <div> <h4>Here’s what we’re looking for:</h4> </div> </div> <div data-testid="markdown-response"> <div> <ul> <li><strong>Battle-Tested:</strong> 5+ years in backend, you’ve led big projects, owned distributed or microservice systems, and made architectural calls.</li> <li><strong>Deep Tech Skills:</strong> TypeScript, Node.js, NestJS, PostgreSQL—these are your bread and butter. Plus: queues, caching, monitoring, system design—you know how all the pieces fit together.</li> <li><strong>Results, Not Just Code:</strong> You don’t just deploy features; you care that they <em>move the needle</em> for the business or product. Show us how your work made a real impact!</li> <li><strong>Mentor Mode On:</strong> Examples where you didn’t just deliver, but also helped others step up—across teams, in reviews, leading by example.</li> <li><strong>Think Product, Think Customer:</strong> You <em>connect</em> what you build to what users and the business actually need.</li> <li><strong>No Shortcuts on Quality:</strong> Automated tests, operational excellence, rollout discipline—you don’t cut corners.</li> <li><strong>Great Communicator:</strong> You break down complex stuff for anyone (tech or not) and earn trust everywhere you go (in English).</li> <li><strong>Learner &amp; Challenger:</strong> You’re always growing, questioning, teaching—and you raise the bar for everyone around you.</li> </ul> </div> </div> <div data-testid="markdown-response"> <div>&nbsp;</div> </div> <div data-testid="markdown-response"> <div><hr></div> </div> <div data-testid="markdown-response"> <div> <h4>Why you might love it here:</h4> </div> </div> <div data-testid="markdown-response"> <div> <ul> <li><strong>Shape the Future:</strong> Your ideas actually matter (a lot). You’ll have real influence on where we go.</li> <li><strong>25 Days Work-From-Anywhere:</strong> Pack your laptop and go—you can work from wherever inspires you, for 25 days a year.</li> <li><strong>Private Pension Plan:</strong> We help you plan for your future, right from day one.</li> <li><strong>Deutschland Ticket:</strong> Get around the city (and beyond!) on us—you’ll always have a ride.</li> <li><strong>VSOPS:</strong> Share in the success you help create with our Virtual Stock Option Plan.</li> <li><strong>Autonomy &amp; Support:</strong> You’ll steer things, but also get feedback and coaching to help you grow as a leader.</li> <li><strong>Your Tech, Your Way:</strong> Mac or Windows? Up to you—we want to set you up for success.</li> <li><strong>Superb Team Spirit:</strong> Ambitious, helpful colleagues, team events, and a truly collaborative vibe. We call it being a “COSie.”</li> <li><strong>You Belong:</strong> We’re building an open, high-performing team—your perspective is needed and welcomed.</li> </ul> </div> </div> <div data-testid="markdown-response"> <div>&nbsp;</div> </div> <div data-testid="markdown-response"> <div><hr></div> </div> <div data-testid="markdown-response"> <div> <p id="message">Sound interesting? Drop us a line. We’d love to meet you!</p> </div> </div> </div>