Software Engineer - Senior Python + Next.js to Review & Take Our Product Live

We’ve built our product and are about to launch. We now need a senior engineer to review what we have, fix what’s broken, and get it production-ready fast. We have a working minimal prototype, and we need someone who can take it the rest of the way to a stable, live release. This is hands-on work, not consulting. You’ll dig into the code, find the problems, and ship the fixes. This is urgent. We’re looking to be live in under a week, so you need to be available to start immediately and work at pace. What you’ll do Review the existing codebase (Python backend + Next.js frontend) and identify bugs, gaps, and launch blockers Fix critical issues and harden the app for production Set up or improve deployment, environment config, logging, and error monitoring Review security basics: auth, secrets handling, input validation, API protection Optimize performance and fix any broken user flows before launch Integrate or fix Shopify-related functionality where needed Give us a short written summary of what you changed and what to watch after launch What we’re looking for 5+ years of professional experience as a senior full-stack or backend engineer Strong Python (FastAPI, Django, or Flask) and Next.js / React / TypeScript Proven experience shipping real production-grade systems, not just prototypes Hands-on experience with a live Shopify store or Shopify integrations (Storefront/Admin API, webhooks, apps) Comfort with CI/CD, Docker, cloud hosting (AWS/GCP/Vercel), and monitoring tools Ability to work independently, make quick decisions, and communicate clearly Available to start right away and respond quickly Testing and QA automation Timeline: Less than one week. Fast turnaround is essential. To apply, please include: Links to 1-2 production projects you’ve shipped with Python and Next.js A Shopify project or integration you’ve worked on How you’d approach auditing a prototype in the first 24 hours Your availability to start today or tomorrow Only apply if you can commit to this timeline. Experienced engineers who have taken products from prototype to live will be prioritized