This job was posted more than 45 days ago 🕒
Crost AI is hiring
Full-Stack Product Engineer (React/Next.JS + AI Infrastructu
- Strong professional experience with React, Next.js, TypeScript and modern JavaScript.
- Experience building and debugging production web applications and customer-facing user flows.
- Ability to investigate difficult issues across frontend code, APIs, backend services, browser behavior and third-party integrations.
- Node.js experience and an understanding of REST APIs, databases, authentication and server-side application behavior.
- Experience writing automated tests, preferably with Playwright or another end-to-end browser-testing framework.
- Experience with product analytics, session replay, error tracking or production-monitoring tools.
- Practical Linux, Docker, Git and CI/CD experience.
- Experience working with e-commerce applications, carts, checkout flows, payments or related integrations.
- Regular, effective use of AI development tools such as Codex, Claude Code, Cursor or similar systems.
- Ability to understand, test and verify AI-generated work rather than accepting it without review.
- Strong problem-solving, written communication and documentation skills.
- Able to work independently while communicating clearly with a small founder-led team.
- Fluent professional English.
- Available approximately 40 hours per week with at least four daily hours overlapping Eastern Time.
- Comfortable beginning with a paid technical trial before transitioning into a long-term role.