Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop a secure full stack saas web app with react and fastapi
Eduardo Bivar
About this gig
Need a production-ready web application, not just a prototype?
I'm a full-stack developer who single-handedly designs and builds complete SaaS products end to end architecture, backend, frontend, and security.
What I can build for you:
- Full-stack web apps (React/Next.js + Python/FastAPI or Node.js/Express)
- Multi-tenant architecture with PostgreSQL and Row-Level Security
- Secure authentication (JWT, MFA/TOTP, role-based access control)
- REST APIs, async backend, and clean data modeling
- CI/CD pipeline (GitHub Actions), Docker, and cloud deployment (Render, Vercel, Neon)
- Automated testing (Pytest, Vitest, Playwright)
Why work with me:
- I ship real, secure, tested production systems, not just demos
- Clear technical documentation and architecture decisions
- Direct communication, no middlemen
Message me before ordering so I can scope your project accurately and recommend the right package.
Gig milestonesNEW
Choose to pay for your project per milestone by only paying when it’s time to start a new one or decide on a 1-time payment.
- Basic Package.
- 1st Milestone: Requirements1-day delivery · No revisions$50Pay now
We'll make sure I have everything needed to complete your project.
- 2nd Milestone: Delivery6-day delivery · 1 revision$100Pay later
I'll send you the final delivery for review and feedback.
These are the steps we’ll follow to complete your project.
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Eduardo Bivar
Eduardo Bivar
Full Stack Developer AI Agents RAG and Security Architecture
- FromBrazil
- Member sinceAug 2026
Languages
Portuguese, English
Full-stack developer specialized in secure, scalable SaaS products and applied AI. I design and build end-to-end solutions — architecture, backend APIs, and polished front-ends — with a strong focus on security (RLS, MFA, encryption, LGPD/GDPR) and AI systems (RAG pipelines, embeddings, autonomous agents). Sole creator of a multi-tenant SaaS in production with 340+ automated tests and full CI/CD. Currently finishing a Bachelor's degree in Software Engineering. I turn complex, manual processes into reliable, user-centered software.
My Portfolio
FAQ
Do you use custom code or website builders like WordPress?
I write fully custom code (React/Next.js, Python/FastAPI or Node.js) — no page builders or templates. You get a real, scalable application, not a drag-and-drop site.
Will I receive the source code and documentation?
Yes. Every package includes full source code delivery plus documentation covering architecture, setup, and how to maintain or extend the project after handover.
What if my project doesn't fit exactly into a package?
Message me with your requirements before ordering. I'll review your scope and recommend the right package, or send a custom offer if your project needs something different.
Do you sign an NDA before starting?
Yes, I'm happy to sign an NDA if you provide one, or use a standard template, before receiving any sensitive project details or code access.
Is hosting or a domain included in the price?
I handle deployment setup (Render, Vercel, Neon, etc.), but hosting/domain costs themselves are billed directly by those providers to you, not included in my price.
Can you work with my existing codebase instead of starting fresh?
Yes. Send me a summary of your current stack and repository access before ordering, and I'll confirm scope and timeline for extending or fixing existing code.
