Full-Stack TypeScript Engineer — AI Music Product (Remote Contractor)

Vocuno is an AI music product. We're hiring a mid-level Full-Stack TypeScript Engineer as a remote independent contractor. Compensation: $2,000–$3,000 USD per month depending on profile. Invoice a US LLC. Payment through Upwork. Trial: one week first, then a one-month trial before ongoing engagement. Hiring process: two interviews — (1) personality / culture fit, then (2) a take-home coding exercise (done at home). What you'll do Ship end-to-end product features in a TypeScript monorepo: web UI → NestJS-style APIs → Firebase (Cloud Functions, Firestore, Auth). In the first ~90 days you'll own medium features (vocals flows, agent chat tools, listen experience, billing edge cases), fix production bugs with root-cause PRs, and harden reliability around credits, covers, and provider failures. You'll work heavily with AI coding tools — especially Claude Code (subscription provided) — for agentic / "vibe" coding workflows. You should already be comfortable driving features that way and happy to automate with agents, while still owning quality, edge cases, and production judgment. We're a young company: the role can grow with you as the product and team do. Must-haves • Strong TypeScript • React (Vite / SSG) • NestJS-style Node APIs • Firebase: Cloud Functions, Firestore, Auth • Strong design taste and solid UI/UX skills • Comfort shipping full-stack features with PRs, tests, and clear write-ups • Solid written and spoken English (async + calls with founder and AI coding agents) • Experience using AI coding tools day-to-day; ready to work primarily with Claude Code and agentic automation Nice-to-haves • Music production interest or background (big plus — we build for musicians) • Expo / React Native • Stripe, PayPal, RevenueCat, or similar credit/billing systems • Audio/media pipelines, queues, or light ops • OpenAPI / contract-first APIs • Prior AI-product or multi-provider work How we work Remote international contractor. Prefer candidates able to invoice a US LLC. Async-first. Claude Code subscription provided. Core focus is product features, not infra from day one. Acceptance criteria (definition of done for ongoing work) • Features ship as reviewable PRs with tests and a short write-up of what changed and why • UI you ship looks polished — strong visual taste, not just "it works" • You can take a medium product task from UI through API and data without hand-holding • Production bugs get a root-cause fix, not a patch-only workaround • Communication is clear in English (written async and spoken on calls) • You use Claude Code / AI agents as a daily workflow while owning quality and edge cases Apply with a short note covering: a full-stack TS feature you shipped, how you use Claude Code / AI coding agents, a UI you're proud of, GitHub or portfolio link, timezone, and how you invoice.