You will get Full Stack Developer for Bug Fixes & Performance Optimization
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Project details
As a Full Stack Developer, I help businesses fix bugs, improve performance, and build stable web applications. A skilled Full Stack Developer should understand frontend, backend, APIs, databases, and scalability. As a Full Stack Developer, I provide solutions for MERN Stack applications, SaaS platforms, API issues, and performance optimization.
I work with startups and businesses that need a reliable Full Stack Developer to debug applications, fix errors, and improve system stability. Every Full Stack Developer should focus on clean architecture and maintainable code, which is exactly how I approach projects.
Businesses hire a Full Stack Developer to reduce downtime, improve scalability, and build production-ready applications. If you are looking for an experienced Full Stack Developer for bug fixing, debugging, API fixes, or Performance Optimization, this service is the right choice.
I work with startups and businesses that need a reliable Full Stack Developer to debug applications, fix errors, and improve system stability. Every Full Stack Developer should focus on clean architecture and maintainable code, which is exactly how I approach projects.
Businesses hire a Full Stack Developer to reduce downtime, improve scalability, and build production-ready applications. If you are looking for an experienced Full Stack Developer for bug fixing, debugging, API fixes, or Performance Optimization, this service is the right choice.
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Localization, Performance OptimizationWhat's included
| Service Tiers |
Starter
$200
|
Standard
$400
|
Advanced
$700
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 15 days |
Number of Revisions | 1 | 2 | 3 |
Bug Investigation | |||
Fix Documentation | - | ||
Detailed Code Comments | - | - |
65 reviews
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CM
Claudio M.
May 13, 2026
Loveable and Supabase integreation
Great working with Rana - fast and reliable! I highly recommend!
MM
Muhammad M.
Jan 12, 2026
Full-Stack Developer Needed for 5-Page React App with Node.js Backend
Rana is a great freelancer who worked on our project with great attention to detail. He did proper research and suggested improvements, which is highly appreciated. No doubt that we will use his services more in the future.
MM
Muhammad M.
Dec 23, 2025
MERN Stack Developer Needed for a Responsive & Scalable Web Application
Rana Imran is an excellent developer with great skills, communication was really easy and he was available at short notice. Highly recommend!
RA
Rana A.
Aug 15, 2025
Real-Time Apps with WebSockets & MongoDB for Ai Module
it was a great experience working with imran , he have enough experience of MERN and delivered on time.
SR
Shane R.
Jul 12, 2025
Go High Level (GHL) Specialist – Ongoing Support & Snapshot Deployment
Sporadic communications - which were fine when they happened, but days would go by, so that coupled with fixes that didn't stick and I've a GHL automation that still does not work as intended after just over 1 month of this contract - now sitting no reply to my follow up message for 5 days so I'm out.
About Rana Imran Mushtaq
Senior Full Stack Developer | AI Expert | NextJs | NodeJs | Supabase
100%
Job Success
Manchester, United Kingdom - 5:58 am local time
With 𝟗𝟎+ completed jobs, and 𝟏𝟎𝟎% Job Success, I focus on building systems that are not just functional, I don’t deliver quick fixes or messy solutions. I build production-ready applications that teams can confidently maintain and scale.
𝐇𝐨𝐰 𝐈 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮:
You don’t just need a developer, you need a Full Stack Developer who understands both business and technology.
I build end to end MERN applications designed to:
• Handle real traffic without performance issues
• Scale as your business grows
• Stay clean, maintainable, and easy to extend
• Deliver real business outcomes, not just features
Whether you're launching an MVP, scaling a SaaS, or fixing a broken app, I focus on long term reliability, not quick fixes.
𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬:
• 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
React.js, Next.js, Redux Toolkit, Tailwind CSS, Material UI
• 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
Node.js, Express.js, REST and GraphQL APIs, TypeScript, Supabase (Auth, Realtime, Edge Functions)
• 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐚𝐧𝐝 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞
MongoDB including schema design, indexing, and optimization
• 𝐀𝐮𝐭𝐡𝐞𝐧𝐭𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐚𝐧𝐝 𝐒𝐞𝐜𝐮𝐫𝐢𝐭𝐲
JWT, OAuth2 (Role based access control)
• 𝐃𝐞𝐯𝐎𝐩𝐬 𝐚𝐧𝐝 𝐏𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞
Docker, CI CD, AWS, GCP deployments, SSR, caching, Netlify, Vercel, code splitting, API optimization
𝐏𝐫𝐨𝐯𝐞𝐧 𝐑𝐞𝐬𝐮𝐥𝐭𝐬:
• Completed 88 plus projects with 100 percent Job Success
• Built SaaS platforms used by real paying customers
• Developed CRMs and automation tools that reduced operational costs
• Improved application performance with faster load times and better scalability
• Delivered clean, production ready code consistently
𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞:
• I take full ownership, no micromanagement needed
• Clean and well structured code your team can rely on
• Clear communication and regular updates
• Focus on long term success, not short term fixes
𝐖𝐡𝐚𝐭 𝐈 𝐃𝐨 𝐁𝐞𝐬𝐭:
• Full Stack Web Development
• MERN Stack Application Development
• SaaS Platforms & Dashboards
• CRM & Internal Tools
• API Development & Integration
• Performance Optimization
• Scalable System Architecture
• Fixing slow or unstable applications
𝐋𝐞𝐭’𝐬 𝐖𝐨𝐫𝐤 𝐓𝐨𝐠𝐞𝐭𝐡𝐞𝐫:
If you need a Full Stack developer who understands both business and technology, click Message or Invite and let’s discuss your project.
🔑 Keywords:
Full Stack Developer | MERN Stack Developer | Senior Full Stack Developer | React Developer | Node js Developer | Full Stack Developer MERN | Next js Developer | MongoDB Developer | Expert Full Stack Developer | Express js Developer | GraphQL Developer | Full Stack Developer SaaS | Backend Developer | TypeScript Developer | Full Stack Developer React Node | Angular Developer | PostgreSQL Developer | Full Stack Developer API | Web Application Developer | Cloud Developer | Full Stack Developer MongoDB | DevOps Developer | REST API Developer | Full Stack Developer Azure | Docker Developer | CI CD Developer | Full Stack Developer UI UX | JavaScript Developer | Full Stack Developer MVP | Frontend Developer | WebSocket Developer | Full Stack Developer Clean Code | SaaS Developer | Full Stack Developer Scalable | API Developer | Full Stack Developer Bootstrap | MUI Developer | Full Stack Developer Docker | Tailwind Developer | Full Stack Developer WebSocket | UI UX Full Stack Developer
Steps for completing your project
After purchasing the project, send requirements so Rana Imran Mushtaq can start the project.
Delivery time starts when Rana Imran Mushtaq receives requirements from you.
Rana Imran Mushtaq works on your project following the steps below.
Revisions may occur after the delivery date.
Initial Assessment & Bug Analysis
Receive access to the React.js frontend and Node.js backend code. Set up the project locally or on a staging server to replicate the environment. Review all reported bugs, error logs, and user feedback.
Bug Fixing & Implementation
Resolve frontend issues in React.js components (UI, state management, routing). Fix backend issues in Node.js (APIs, database queries, authentication, server errors).