You will get SaaS Feature Development & Codebase Ownership | Next.js, NestJS
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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.
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, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$350
|
Standard
$900
|
Advanced
$2,200
|
|---|---|---|---|
| Delivery Time | 5 days | 14 days | 21 days |
Number of Revisions | 1 | 2 | 3 |
Design Customization | - | ||
Content Upload | - | - | |
Responsive Design | |||
Source Code | - |
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ZD
Zelalem Eshetu D.
Jun 18, 2026
Full Stack Developer Needed for Custom E-Commerce Platform
Very professional, reliable, and easy to work with. Highly recommended!
NR
Naeem R.
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.
Sep 25, 2025
Bug Fix Assistance for Lovable Vibe Coding Project
Excellent to work with. Great communication skills.
AT
Accu T.
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.
Dec 8, 2023
React native develop app without API integration
About Muhammad
Full Stack SaaS Developer | Stripe, Real-Time Dashboards | Next.js
100%
Job Success
Islamabad, Pakistan - 2:51 am local time
Whether you are launching a SaaS product from scratch, extending a live platform, or taking over a codebase a previous developer left behind, I build production-ready applications across web and mobile that founders and product teams rely on. One platform I helped build tracks more than 1.3 billion user sessions.
As a full-stack SaaS developer, I build web on React and Next.js and mobile on React Native, so one developer owns your whole product, not just half of it. From billing systems and real-time dashboards to production iOS and Android apps, I ship the full thing and stay accountable for it.
𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐥𝐞 𝐭𝐨 𝐬𝐭𝐚𝐫𝐭 𝐢𝐦𝐦𝐞𝐝𝐢𝐚𝐭𝐞𝐥𝐲. 𝐇𝐢𝐭 𝐭𝐡𝐞 𝐈𝐍𝐕𝐈𝐓𝐄 𝐛𝐮𝐭𝐭𝐨𝐧.
How I Can Help:
✔ Full Stack SaaS Development: Scalable SaaS platforms with secure auth, role-based access, dashboards, and APIs on React, Next.js, and NestJS.
✔ Cross-Platform Mobile Apps: Production React Native apps with Firebase, push notifications, phone auth, card payments, and full iOS and Android builds shipped end to end.
✔ Billing and Payments: Stripe and Worldpay subscriptions, webhooks, 3DS card flows, and payment workflows.
✔ Real-Time Dashboards: Live WebSocket dashboards and analytics, proven at 1.3 billion sessions.
✔ Backend and Database: PostgreSQL and Supabase architecture, clean schema, RLS, and API layers on NestJS and Node.js.
✔ Codebase Rescue: Take over, stabilize, and extend messy or abandoned codebases and bring them into production.
✔ AI Integration: OpenAI and Claude features where they add real product value.
Why Clients Choose Me:
• Production-ready SaaS and mobile, not throwaway prototypes
• One developer for web and mobile, no handoffs
• Direct communication, no outsourcing, accountable for the result
Industries I Work With:
• SaaS Platforms • Startups • FinTech • E-commerce • Construction • Internal Tools • Enterprise Software
𝐖𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐒𝐚𝐲:
"Muhammad shipped our billing module end to end on a live B2B SaaS. PostgreSQL schema, NestJS API, full Stripe integration."
"Very professional, reliable, and easy to work with. Highly recommended."
"High quality work and a great React developer. Flexible, clear communication, replied quickly."
If you want a developer who ships SaaS products across web and mobile, not just prototypes, I would like to hear about your project.
Let's schedule a free consultation to scope your idea, pick the right stack, and build a production-ready product that scales with you.
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.