SaaS and portals
Multi-tenant apps, client portals and member dashboards.
Custom web apps with React, Next.js and PostgreSQL
Dashboards, portals and SaaS products in React and Next.js, with payments, logins and AI built in.
Quick answer
Raja Sheryar Shahid (Raja S. on Upwork) is a Top Rated Plus freelancer with 926 completed jobs and a 97% Job Success Score who provides Web apps (React & Next.js) for businesses worldwide. Dashboards, portals and SaaS products in React and Next.js, with payments, logins and AI built in. Projects are hired and paid through Upwork.
When a website is not enough, I build web apps. My own product, AgencyPilotHQ, is a multi-tenant SaaS for agencies with client portals, CRM deals, proposals, contracts with e-signature, invoices and AI assistants, built with Next.js, TypeScript, PostgreSQL and Stripe.
I use the same stack for client portals, internal tools, calculators and dashboards, with role-based access, clean APIs and a front end that is easy to use.
What’s included
Web apps (React & Next.js), done properly.
Payments
Stripe subscriptions, one-time payments and invoices.
Auth and roles
Logins, teams and role-based access done properly.
APIs
REST APIs and webhooks that connect to your other tools.
AI features
OpenAI and Claude APIs for assistants, summaries and automation.
Dashboards
Clear data views, filters and reports for your team or clients.
Related work
Full portfolio Real projects, live today.
How I work
Clear steps. No surprises.
01
Discovery
We agree on goals, pages, features and the timeline up front, in a written scope.
02
Design
UI/UX in Figma, or I build from your own design.
03
Build
Pixel-perfect and responsive on a staging site you can review any time.
04
Optimize
Speed, on-page SEO, schema and cross-browser QA.
05
Launch & support
Go-live, a Loom walkthrough at hand-over and support after launch.
FAQ
Web apps (React & Next.js): common questions
Can you build an MVP for my startup?
Yes. I scope the smallest version that proves the idea, build it in Next.js with a real database and payments, and leave it ready to grow.
Can you add features to my existing React app?
Yes. I review the codebase first, then add features in the same style so the app stays consistent.
Related services
AI chatbots
AI assistants that answer from your own content, qualify leads and send them to your CRM, day and night.
Learn moreAutomation & integrations
Forms, payments and data that flow into the right tools automatically, so nothing is copied by hand.
Learn moreMemberships & courses
Paid memberships, online courses and gated content, with logins and Stripe billing that just work.
Learn more
Let's build your next website.
Invite me to your job or book a consultation on Upwork. I usually reply within a few hours.