Backend Engineer (NodeJs)

Build like a founder. Ship like Spartan.Our customers are scaling fast — and so are we. That’s why we’re looking for a Backend Engineerto join our world-class team.At Spartan, we don’t act like vendors. We embed with startups backed byYC, Pear VC, BlingCap ,a16z, Techstars, and more — partnering with founders and engineers fromStanford, MIT, Yale, Google, Amazon, Uber, and beyond.Together, we help launch MVPs in 30 days and scale systems that power billions of requests.This isn’t “just another backend role.” It’s a chance to work shoulder-to-shoulder with elite builders, solve complex startup challenges, and see your code directly drive companies raising millions on the global stage.You’ll also be working at the frontier of AI:70% of our portfolio today is LLM-powered. Our engineers leverage the latest tools likeCursor, Claude, and Codexto move faster, write cleaner code, and solve harder problems.  Key ResponsibilitiesDesign, develop, and maintain backend services using Node.jsBuild and optimize RESTful APIs (and potentially GraphQL)Collaborate with frontend engineers, product managers, and cross-functional teamsImplement best practices in coding, testing, and deploymentEnsure system scalability, security, and performanceParticipate in code reviews, technical discussions, and architectural planning