Full-Stack Software Engineer - Fully Remote

About this role CoTrain is a vetted marketplace that connects companies with elite, pre-screened engineers — we handle vetting and matching so you go straight to real work. This is a hands-on, full-time engineering seat with real ownership from week one. What you'll do We're looking for a full-stack engineer to own real surface area across Astro AI's product, front to back. This isn't ticket-taking. You'll ship features end to end on Next.js, React, and Supabase, make product calls in the moment, and treat AI as a core part of how you build — not a tool you occasionally open. Build full-stack features end to end across the frontend (Next.js, React, TypeScript) and backend (Supabase, Postgres) Own real product surface area — core flows, onboarding, payments, and everything that makes the product work Work on payment and subscription infrastructure (Stripe / Stripe Connect) Ship fast and iterate live with real users — hours and days, not weeks Use Claude as a core part of your workflow: sub-agents, MCPs, Claude Code What we're looking for Full-stack: Next.js, React, TypeScript, and a Postgres-backed stack like Supabase AI-native — you live in Claude and it shows in your velocity Strong product and UI/UX instincts; you care how things look and feel High agency — you don't wait to be told what to build A shipper who'd rather ship and iterate than polish for a month Available on US time zones Hungry in the prove-everyone-wrong way, not the "looking for a job" way Nice to have Shipped products to real users as a founding or early engineer Hands-on experience with Stripe / Stripe Connect or marketplace payments Fluent with agentic tooling and MCPs beyond the basics A design sensibility (Figma, taste, an eye for detail) Why this role You'll work directly with the founder on the core product and see how a fast-moving company runs from the inside — real ownership, real responsibility, and room to grow as the company scales. How to apply Apply through CoTrain, not by email — open the listing on CoTrain, sign in or create your expert profile if you're new, and submit your best projects and a short note on why you're the one. You'll also take a short 8-minute AI interview as part of your application. From there you'll get vetted and matched through the platform, and we'll reach out to you on CoTrain. PS: We review applications daily — complete your application on CoTrain to be considered. Show more Show less