I will build your full stack saas app with next js supabase and secure auth


About this gig
Struggling to turn your idea into a real product? I build production-ready full-stack apps, not prototypes.
I'm Gabriel 9 apps in production, cybersecurity background. Most freelance builds skip proper data isolation between users; mine don't. I implement Row Level Security (RLS) and RBAC by default.
What I build: full-stack apps (Next.js, React, TypeScript), SaaS with subscriptions (Stripe, Pix), AI features with validated LLM output, secure Supabase backends, custom business logic, PDF generation, dashboards, real-time features.
Recent work, live in production:
- MatchCV AI resume matcher, Stripe/Pix billing, RLS-isolated data
- JC Cortinas pricing engine, RBAC, PDF quotes, daily use by a real client
- Trampa marketplace with geolocation, live chat, bidding
- Divide Ai real-time expense splitting, RLS and triggers
3 peer-reviewed papers (ACM/IEEE) on digital twins demanding requirements welcome, not just CRUD.
How I work: scope defined upfront, updates each milestone, clean documented code, plus 14 days free bug fixes after delivery.
Message me with what you're building, even a rough idea, and I'll tell you honestly if it's a good fit.
Get to know Cordeiro
- FromBrazil
- Member sinceSep 2023
- Avg. response time1 day
Languages
English, Portuguese
FAQ
Can I see something you've already built?
Yes, check the gig gallery and my portfolio at curriculo-desenvolvedor.vercel.app
Do you deliver the source code?
Yes, full documented source code, no vendor lock-in.
I don't have a technical spec, just an idea — can you help me scope it?
Yes, defining scope together is always the first step, before I write any code.
Do you work with international clients, or just Brazil?
I work with clients worldwide. For Brazilian clients I can also integrate Pix alongside Stripe/card payments.

