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You will get SaaS Feature Development & Codebase Ownership | Next.js, NestJS

Muhammad U.Status: Offline
Muhammad U. Muhammad U.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Muhammad, priced and ready to go.
Muhammad U.Status: Offline
Muhammad U. Muhammad U.
5.0
Top Rated
Preview image

Let a pro handle the details

Buy Web Application Programming services from Muhammad, priced and ready to go.

Project details

Need a senior developer to build features, fix technical debt, or take ownership of an existing SaaS product? I help founders and product teams extend production SaaS apps without breaking what already works.

I build and improve SaaS platforms in Next.js, React, NestJS, Node.js, TypeScript, PostgreSQL, and AWS. Whether you need a new module, dashboard, billing workflow, reporting system, API integration, AI feature, or backend service, I take over an existing codebase and ship production-ready work that fits your architecture.

Recent work includes a SaaS analytics platform tracking over 1.3 billion sessions, an enterprise construction SaaS with complex workflows and permissions, Stripe billing with subscriptions and webhooks, and internal tools for live SaaS businesses.
I work directly with you. No outsourcing. No handoffs. Send me your requirements, Figma, roadmap, or codebase, and I will tell you exactly how I would approach it and which package fits your scope.
Programming Languages
JavaScript, Python, TypeScript
Coding Expertise
Cross Browser & Device Compatibility, Performance Optimization, Security
What's included
Service Tiers Starter
$350
Standard
$900
Advanced
$2,200
Delivery Time 5 days 14 days 21 days
Number of Revisions
123
Design Customization
-
Content Upload
-
-
Responsive Design
Source Code
-
5.0
5 reviews
100% Complete
(5)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)
1% Complete
(0)

NR

Naeem R.
5.00
May 26, 2026
Senior Full Stack Developer for SaaS Billing Dashboard with Stripe and API Integrations Muhammad shipped our billing module end to end on a live B2B SaaS. PostgreSQL schema, NestJS API, full Stripe integration with webhooks, SendGrid, and a real time WebSocket dashboard in React and Next.js. Deployed to AWS without breaking live flows. Senior on backend and frontend. Clear async communication. Will hire again.

CP

Cameron P.
5.00
Sep 25, 2025
Bug Fix Assistance for Lovable Vibe Coding Project Excellent to work with. Great communication skills.

AT

Accu T.
5.00
Mar 3, 2025
ReactJS Expert UI Developer (Web, Mobile) Usman did high quality work and is a great React developer. He was flexible with his timings, attended weekly meetings for clarification and replied to emails quickly. Listened to our feedback and provided us with a solid front end design. Overall, a very good person to work with and looking forward to working with him in the future!

MS

Muhammad S.
5.00
Dec 8, 2023
React native develop app without API integration

JG

Jonathan G.
5.00
Nov 21, 2023
Update react native code and add login with phone number and twillio implementation great help, thanks
Muhammad U.Status: Offline

About Muhammad

Muhammad U.Status: Offline
SaaS Developer | Next.js, React, NestJS, Stripe, Supabase & AI
100% Job Success
5.0  (5 reviews)
Islamabad, Pakistan - 9:41 pm local time
You need a SaaS product built from Scratch or have a SaaS product that needs new features, a platform that needs to scale, or an existing codebase that a previous developer left behind.

I help founders and product teams build, extend, and stabilize production applications. One platform I helped build tracks more than 1.3 billion user sessions.

Over the last 7+ years, I have worked on enterprise SaaS platforms, billing systems, internal tools, analytics dashboards, and real time applications used by thousands of users.

Recent work includes:

➜ SaaS analytics platform with real time dashboards and a React Native SDK tracking more than 1.3 billion user sessions.

➜ B2B SaaS billing platform with Stripe subscriptions, webhooks, PostgreSQL architecture, SendGrid integration, and real time WebSocket dashboards.

➜ Enterprise construction SaaS built with React, NestJS, and PostgreSQL, featuring complex workflows, permissions, and large scale data management.

➜ AI powered desktop platform that converts hand drawn circuits into editable schematics, simulation ready netlists, and live parameter analysis using machine learning and computer vision.

I can help with:

➜ Building new SaaS products.

➜ Extending existing applications.

➜ Taking over and stabilizing codebases.

➜ Next.js and React development.

➜ NestJS and Node.js backend systems.

➜ Stripe subscriptions, billing, and payment workflows.

➜ PostgreSQL database design and optimization.

➜ Real time dashboards and WebSocket applications.

➜ AI integrations using OpenAI and Claude.

➜ Third party integrations including Twilio, SendGrid, HubSpot, and external APIs.

Core Stack:

Next.js, React, TypeScript, Node.js, NestJS, PostgreSQL, Supabase, Prisma, MongoDB, Stripe, OpenAI, Claude, Tailwind CSS, REST APIs, WebSockets, Docker, AWS, and CI/CD.

I work directly with founders and product teams. No outsourcing. No handoffs. I write the code, ship the features, and stay accountable for the result.

If you need a developer who can take ownership of a SaaS product, extend an existing platform, or help bring a complex application into production, send me the requirements, Figma file, or codebase and I will tell you exactly how I would approach it.

Steps for completing your project

After purchasing the project, send requirements so Muhammad can start the project.

Delivery time starts when Muhammad receives requirements from you.

Muhammad works on your project following the steps below.

Revisions may occur after the delivery date.

Client mention all requirements

You need to mention all your requirements and then get the project

Scope and review

We define the work and the acceptance criteria. I review your codebase, stack, and architecture, then confirm exactly what gets delivered.

Review the work, release payment, and leave feedback to Muhammad.