I will create custom web and saas applications

I
iamdebarshi
I
iamdebarshi
Debarshi Sau
create custom web and saas applications
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create custom web and saas applications
Full Screen
Full Screen
create custom web and saas applicationscreate custom web and saas applicationscreate custom web and saas applications

About this gig

I Build Production-Grade Web & SaaS Applications


Not quick fixescomplete, scalable solutions that actually work.


Who I Am:

- Founder & CTO of Rynce Private Limited (IN DEVELOPMENT)

- Built ClassConnect - Used by 20000+ users at Adamas University

- Expert in React, Next.js, Node.js, TypeScript, PostgreSQL


What You Get:

- Full-stack web applications from concept to production

- Enterprise-grade architecture & database design

- Responsive UI/UX with modern frameworks

- REST APIs, authentication, real-time features

- Complete deployment & setup (Vercel/custom servers)

- Detailed documentation & handover


I Specialize In:

SaaS Platforms (multi-tenant systems)

Real-time applications (WebSockets, live updates)

Complex databases (PostgreSQL, Redis)

API integration (Stripe, LLM APIs, etc.)

Authentication (JWT, WebAuthn, OAuth)

Performance optimization


Let's Talk:

Message me first to discuss your requirements, tech stack, and timeline. I provide accurate estimates and transparent communication.


Ready to build something amazing? Let's go!

  • Website type

    • Saas

  • Programming language

    • JavaScript
    • TypeScript
    • React
    • Tailwind CSS
    • Node.js

  • Website features

    • Payment
    • Customer support
    • Analytics
    • FAQ
    • Portfolio
    • Dashboard
    • Admin Panel
    • API integration
    • AI integration
    • Database integration

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.
    These are the steps we’ll follow to complete your project.
  • 1st Milestone: Planning
    2-day delivery · 1 revision
    $50Pay now

    I'll use your provided requirements to start planning your website.

  • 2nd Milestone: Specifications
    5-day delivery · 2 revisions
    $50
    Pay later

    I'll write the specifications for your site's functionality and features.

  • 3rd Milestone: Development
    5-day delivery · 2 revisions
    $50
    Pay later

    I'll develop the website and deliver a working product for your review.

  • 4th Milestone: Delivery
    2-day delivery · 1 revision
    $50
    Pay later

    I'll send you the final delivery for review and feedback.

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 Debarshi Sau

Debarshi Sau

FullStack Engineer, SaaS Architect, Production Systems Expert

  • FromIndia
  • Member sinceMar 2026

  • Languages

    Bengali, Hindi, English
👨‍💼 Hi! I'm Debarshi, a full-stack engineer and founder of Rynce, a commercial fintech SaaS platform. 🚀 What I Do: I build production-grade web applications and SaaS platforms, not quick fixes. I specialize in: ✅ Full-Stack Web & Mobile Apps (React, Next.js, Node.js) ✅ SaaS Architecture & Multi-tenant Systems ✅ System Design ✅ Real-time Features & Complex Algorithms ✅ Payment Integration & Financial Systems ✅ DevOps & Infrastructure ✅ Authentication & Security (WebAuthn, MFA, Passkeys) 💼 Experience: - Founder & CTO of Rynce Private Limited (IN DEVELOPMENT)

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