You will get React & Node.js Expert | Full-Stack Applications
Top Rated
Project details
I am an Expert MERN Stack Developer with 10+ years of experience building modern, scalable, and high-performance full-stack web applications using MongoDB, Express.js, React.js, and Node.js.
I specialize in creating end-to-end solutions, from responsive and dynamic front-end interfaces in React to secure and optimized back-end systems using Node.js and Express. Whether you need a custom web app, SaaS platform, admin dashboard, eCommerce system, or API-driven application, I deliver clean, maintainable, and production-ready solutions.
My focus is on performance, scalability, clean architecture, and security best practices, ensuring your application is reliable and built for long-term growth.
I specialize in creating end-to-end solutions, from responsive and dynamic front-end interfaces in React to secure and optimized back-end systems using Node.js and Express. Whether you need a custom web app, SaaS platform, admin dashboard, eCommerce system, or API-driven application, I deliver clean, maintainable, and production-ready solutions.
My focus is on performance, scalability, clean architecture, and security best practices, ensuring your application is reliable and built for long-term growth.
Programming Languages
PHP, HTML & CSS, JavaScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$300
|
Standard
$500
|
Advanced
$1,250
|
|---|---|---|---|
| Delivery Time | 2 days | 5 days | 10 days |
Number of Revisions | 1 | 5 | Unlimited |
Number of Pages | 1 | 5 | 10 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code | - | - | - |
Frequently asked questions
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AR
Ahmad R.
Jul 7, 2026
Full-Stack React/Next.js & Node.js Developer for SaaS Platform, API Integrations & n8n Automation
He was quick to solve the issue in our SaaS platform and helped us fix it faster than expected. He worked with our React, Next.js, Node.js, and GHL automation issue. We’ll be happy to work on more tasks
MZ
Muhammad Z.
Jun 23, 2026
Full-Stack React/Node Developer for SaaS Platform (API Integrations & n8n Automation)
Our SaaS platform is built on a complex stack of Node.js, Angular, Next.js, and n8n automations. Although the developer initially estimated 2–3 days to investigate and resolve the issue, he identified the root cause and delivered the solution within hours. After reviewing the implementation with our senior developer, we confirmed it was the ideal solution. Highly skilled, efficient, and great to work with.
NB
Nina B.
Apr 2, 2026
Work on WP site for Retreat Stuff as outlined.
After going "through" several back end (coding, etc.) developers, Shiekh has been the only one so far that seems to really know all the details of how to resolve and fix issues, as well as just being pleasant to work with! I'd highly recommend him to other customers for even their most complex needs as he is extremely knowledgeable and dedicated to understanding the client's needs as well as expressing the best ways to reach your goals and achieve optimal functionality. He noticed right away with my site that we were being restricted by the choice of host and its limitations and found a much better option for our needs and then did the work to help migrate, review, fix bugs and issues, and then overseeing the best ways to maintain. Some things are so complex that I might not remember the pathways to do adjustments or edits along the way or fix the issues as an admin, but Sheikh is patient in walking me through it again as needed. I hesitate to expand too much on how he is proficient in his trade, as I don't want to lose him to too many other jobs! lol He's that good! :) If he doesn't know something, he will find out the answers and implement, and you cannot ask for more than that! That is of course what makes him superior to other developers who might not have the "band width" that he does. Highly recommend!
RF
Rabia F.
Feb 19, 2026
Custom WordPress Website Development
Sheikh handled a complex custom WordPress task that many freelancers failed to complete. Impressed by his excellent technical skills, clear communication, and professional attitude throughout the project. Reliable and highly recommended.
FB
Felix B.
Feb 19, 2026
Webflow beast to join us
Great experience to work with Sheikh, Communicate well , is motivated and answer very fast , he's always available for us and was always kind and polite. He delivered what we need with the quality we requested.
About Sheikh
Full Stack Developer
100%
Job Success
Islamabad, Pakistan - 11:48 am local time
Top Rated | 100% Job Success Score | 1000+ hours on Upwork
11+ Years | $1M+ in Client Revenue Generated
Need to build a SaaS product, improve an existing application, connect multiple platforms or replace a manual business process with reliable automation?
I build and improve full stack SaaS platforms using React, Next.js, Node.js, TypeScript, PostgreSQL, and Supabase, then connect them with payment systems, CRMs, AI services, and automation platforms through secure APIs and webhooks.
Clients hire me to build MVPs, take over unfinished applications, fix production issues, integrate third-party systems, and automate operational workflows.
𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘆𝗼𝘂 𝘄𝗶𝘁𝗵:
𝗙𝗨𝗟𝗟 𝗦𝗧𝗔𝗖𝗞 𝗦𝗔𝗔𝗦 𝗔𝗡𝗗 𝗠𝗩𝗣 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧
1. SaaS platforms, MVPs, dashboards, portals, and internal tools
2. React, Next.js, Node.js, Express.js, and TypeScript
3. Multi-tenant architecture, authentication, RBAC, and user permissions
4. PostgreSQL, MongoDB, Supabase, and database architecture
5. Stripe subscriptions, checkout, billing portals, and payment webhooks
6. Existing application takeover, debugging, refactoring, and continued development
7. Full-stack development for SaaS platforms, MVPs, dashboards, portals, and internal tools
𝗕𝗔𝗖𝗞𝗘𝗡𝗗, 𝗔𝗣𝗜 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧 𝗔𝗡𝗗 𝗗𝗔𝗧𝗔𝗕𝗔𝗦𝗘 𝗗𝗘𝗩𝗘𝗟𝗢𝗣𝗠𝗘𝗡𝗧
1. REST APIs, GraphQL, OAuth, and webhooks
2. Third-party SaaS and CRM integrations
3. Stripe, Twilio, SendGrid, HubSpot, and GoHighLevel
4. Background jobs, retries, queues, validation, and failure recovery
5. Secure authentication, authorization, and role-based access
6. Data synchronization between platforms
𝗔𝗜 𝗔𝗚𝗘𝗡𝗧𝗦 𝗔𝗡𝗗 𝗪𝗢𝗥𝗞𝗙𝗟𝗢𝗪 𝗔𝗨𝗧𝗢𝗠𝗔𝗧𝗜𝗢𝗡
1. AI agents, AI chatbots, voice agents, RAG systems, and document assistants
2. OpenAI API, Claude, LangChain, vector databases, and structured AI outputs
3. n8n, Make automation, Zapier, and GoHighLevel workflow automation
4. CRM automation, lead qualification, appointment booking and follow up systems
5. Knowledge base retrieval with human escalation and fallback handling
6. Google Workspace, email, calendar, CRM and business tool integrations
𝗗𝗔𝗦𝗛𝗕𝗢𝗔𝗥𝗗𝗦 𝗔𝗡𝗗 𝗜𝗡𝗧𝗘𝗥𝗡𝗔𝗟 𝗧𝗢𝗢𝗟𝗦
1. Admin dashboards, client portals, reporting systems, and internal applications
2. Data tables, filters, search, charts, analytics, status tracking, and role-based views
3. Frontend and backend workflows connected through clean, maintainable APIs
4. Data-heavy interfaces designed for speed, usability, and responsive performance
𝗥𝗘𝗖𝗘𝗡𝗧 𝗣𝗥𝗢𝗝𝗘𝗖𝗧 𝗘𝗫𝗣𝗘𝗥𝗜𝗘𝗡𝗖𝗘
1. AI call agent that holds natural conversations, qualifies leads, updates CRM records, and triggers appointment and follow-up workflows
2. Bilingual WhatsApp AI sales agent using knowledge-base retrieval and human handoff
3. RAG chatbot built with FastAPI, LangChain, pgvector, and a React/WordPress widget
4. GoHighLevel automation covering routing, structured inputs, calendars, webhooks, notifications, and follow-ups
5. Cal based mentoring SaaS using Next.js, tRPC, Prisma, PostgreSQL, Redis and calendar APIs
𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞
1. Translate specifications into clear architecture and testable milestones
2. Verify locally before deploying changes to staging or production
3. Build with security, maintainability, performance, and future expansion in mind
4. Test critical workflows, integrations, failure paths, and responsive behaviour
5. Communicate clearly and document setup, assumptions and technical decisions
If you need a Full Stack Developer for a SaaS MVP, Next.js dashboard, Node.js backend, AI agent, n8n automation, Stripe integration, internal tool, booking platform, API integration or live application maintenance, send me your specification or current workflow
I’ll identify the simplest reliable path to a working, maintainable system.
Sheikh Abdullah
Full Stack Developer and Automation Engineer
Steps for completing your project
After purchasing the project, send requirements so Sheikh can start the project.
Delivery time starts when Sheikh receives requirements from you.
Sheikh works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1
requirement Gathering
Step 2
start work