Senior Full-Stack Product Engineer building and modernizing production software.
I work hands-on across web, mobile, backend, integrations, and practical AI. I help founders and product teams ship a focused new build, improve an inherited product, or add a bounded capability with clear acceptance checks and a production handoff.
- CraveUp — named employer work; hands-on contribution across customer ordering, merchant operations, React Native staff workflows, and shared Node.js services.
- Resumi — full-stack contribution across structured editing, live preview, AI assistance, sharing, export, and Stripe-backed billing gates. Live demo
- FormPilot — full-stack intake-to-triage workflow; submissions are validated and persisted before asynchronous OpenAI Responses SDK extraction. Live demo
- StudyAI — public-source product-leadership proof; product direction, acceptance criteria, and review. Engineering implementation was completed by the project team. Source
React Next.js TypeScript Node.js PostgreSQL Flutter React Native OpenAI
- Portfolio: mumar.dev
- LinkedIn: linkedin.com/in/mumar20
- Intro call: Book a 30-minute intro call