Fixes for Lovable, Replit, Cursor and Bolt apps on Next.js and Supabase, plus SaaS MVPs and AI features built from scratch.
Fix the app you have, or build the one you need
Fixed prices, a written plan before any code, and a staging link early. You own the code and the hosting.
An audit-and-fix service for web apps generated with AI coding tools such as Lovable, Bolt, Cursor and Replit, covering authentication, database access rules, payments, secrets and deployment.
A feature that writes, summarises or generates inside your app, or a chatbot that answers from your own documents and shows its sources.
Integration of large language models such as OpenAI GPT, Gemini and Claude into existing web applications, including retrieval-augmented generation (RAG) chatbots grounded in a business’s own documents.
Login, a real database with access rules, your core features, Stripe billing and an admin view, built on Next.js and Supabase and deployed on accounts you own.
Development of minimum viable SaaS products on Next.js and Supabase, including authentication, row-level security, Stripe subscription billing and admin tooling.
Yes. I fix Lovable, Bolt, Cursor, Replit and Claude projects on React or Next.js with Supabase and Stripe. Every job starts with a 20-point launch check that shows what blocks launch and the price of each fix before I touch the code.
Yes. I build chatbots on the OpenAI API that answer from your own documents and show their sources, with usage limits and a cost estimate from tests on your data before the build.
Yes. I rebuilt a compromised 46-page WordPress site in Next.js, migrated it to Sanity as 18 document types, removed the spam, and added three more languages.
From $149 for a launch foundation in 4 days, $699 for a launchable MVP with Stripe subscriptions in 12 days, and $1,499 for a full MVP with roles, emails and an admin dashboard in 21 days.
Taking an AI-generated app to production means replacing demo-only code paths with real authentication, database access rules, payment confirmation by webhooks, and admin tooling, so the app works for real users and real money.
From Lovable demo to a live marketplace
How an AI-built prototype that could not take a single booking became a two-sided marketplace with real payments.
The Lovable prototype looked finished, but it could not take a real booking: no working payments, no host tools, no admin and no access rules.
Admin modules
A production rebuild on React and Supabase, with payments confirmed by Stripe webhooks.
Real payments — Stripe Connect with commission splits
Locked-down data — Row-level security on the database
Three surfaces — Customers, hosts and a 12-module admin
12
Admin modules
Stripe
Connect
Realtime
Chat
Yes. The Find Your Cooking Class prototype was built in Lovable and could not take a real booking. It was rebuilt on React and Supabase with Stripe Connect payments confirmed by webhooks, a host dashboard, a 12-module admin panel, real-time chat and row-level security, and is live at findyourcookingclass.com.
Word for word from my Upwork and Fiverr reviews. Click a card to see it on the platform.
5-star review, bug fixing
Magnificent experience! Highly knowledgeable and very easy to work with. Was able to fix some bugs in a short time that other devs weren't able to fix in a week. We'll surely hire him again.
5-star review on Upwork
Mohammad completed the milestone onpoint faster than expected and fixed a bug found during the process, what more could a founder ask for when hiring on UpWork. Its been great output on this development journey and filled us all with confidence to continue hiring.
5-star review on Fiverr
We are very pleased to have worked with Shuja on our project. Delivery was on time, and he was always very helpful in addressing our questions and instructions. We will definitely contact him again for future stages of our project, as he helped us improve several aspects of the code architecture.
5-star review on Upwork
Great developer to work with. He is committed, reliable, hardworking, and always focused on delivering what was agreed upon. Communication is good, and he takes responsibility for the work and follows through until the job is completed. I would definitely recommend him and would be happy to work with him again.
5-star review on Upwork
Mohammad was fast and detailed in his output, keen to complete the project milestone with every detail covered plus he over delivered fixing bugs found in the code. He has much experience and looks to the present and future in his work, that the project is optimal and outcomes enforce our vision whilst staying within budget.
5-star review on Fiverr
Shuja did an outstanding job on my project. From the beginning, he understood my vision, communicated clearly, and delivered high-quality work with great attention to detail. He was professional, responsive, and always willing to make improvements whenever needed. I’m very happy with the final result and truly appreciate his dedication throughout the entire process. I highly recommend Shuja to anyone looking for a skilled and reliable developer. I look forward to working with him again on future projects!
5-star review on Fiverr
Great work and very detailed. Would work with again.
Clients on Upwork and Fiverr mention fast bug fixes that other developers could not solve, milestones delivered ahead of time, clear communication, and help improving their code architecture. Several have hired him again for later phases.
Filter by the kind of help you need. Every project is live and every case study says exactly what I did.
Plan first. Then build.
A short scope, a written plan with a fixed price, a staging link early, and a launch on accounts you own.
You send the app link, the repo and what goes wrong, or the idea you want to launch. A short message or call is enough to agree on what "done" means.
Four steps: (1) Scope: you send the app link, repo and the problem, and he replies within 24 hours. (2) Plan and price: a written launch check or one-page plan with a fixed price before any work. (3) Build on staging: work in the agreed order with a preview link early. (4) Launch and handover: live on your accounts, with the code and notes on what changed.
Mohammad Shuja Uddin offers free 30-minute calls to scope app fixes, SaaS MVPs and AI features. He replies within 24 hours.
Send me your app link and what is broken.
You get back what is wrong, what I would fix first and a fixed price, within 24 hours. No call needed.
Book a free 30-minute call on shuja.app, or hire him on Upwork or Fiverr. Send the app link, the repo and what goes wrong, and you will get a plan with a fixed price before any work starts. He works on Next.js, React and Supabase apps, including apps built with Lovable, Bolt, Cursor and Replit.
