Frontend Engineer (Junior - Middle | Good English)

Build like a founder. Ship like Spartan.Our customers are scaling fast — and so are we. That’s why we’re looking for a Frontend Engineer to join our world-class team. At Spartan, we don’t act like vendors. We embed with startups backed by YC, BlingCap, Pear VC, a16z, Techstars, and more — partnering with founders and engineers from Stanford, MIT, Yale, Google, Amazon, Uber, and beyond. Together, we help launch MVPs in 30 days and scale systems that power millions of users.This isn’t “just another frontend role.” It’s a chance to craft intuitive user experiences, 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 like Cursor, Claude, and Codex to accelerate development and integrate AI-native workflows into everything we build. What You’ll Do: Build beautiful, performant, and scalable web applications using React, TypeScript, and modern JavaScript.Collaborate directly with US startup founders and product leaders — shaping solutions that drive their business forward.Ship fast with a proven process: async standups, PRDs/RFCs, code reviews, automation.Work in an AI-native workflow — leveraging tools like Cursor, Claude, and Codex to reduce boilerplate and boost iteration speed.Uphold engineering excellence — clean code, testing, documentation, reliability.Help shape Spartan’s engineering culture — we’re 1% pass-rate engineers who work like founders, not contractors.