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Md Abu S.
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Md Abu S.

Full Stack Developer | AI, Lovable, Node.js, Supabase, Mobile App

🔥🔥🔥 Top Rated Plus Professional 🔥🔥🔥 🚀 Built Your SaaS or Mobile App with AI Tools but Now Need It Production-Ready? If you used Lovable, Bolt, Base44, or any other full-stack AI generation tool to build your MVP — but now the code is messy, slow, or hard to scale — I help turn it into a clean, secure, production-ready SaaS and Mobile Application. I am a Senior Full-Stack & Cross-Platform Mobile Developer (100% Job Success, $80K+ earned) with 6+ years of experience. I don't just write code — I fix architecture, optimize multi-platform performance, and prepare your product for real-world traffic on Web, iOS, and Android. 🎯 What I Specialize In 🌟 AI-to-SaaS MVP Cleanup & Scale 🌟 AI Code Refactoring: Cleaning and restructuring messy code generated by Lovable, Bolt, Cursor, or v0. 🌟 Production Readiness: Transitioning prototypes into secure, robust commercial applications. 🌟 Feature Expansion: Integrating advanced custom features that AI tools cannot build natively. 📱 Cross-Platform Mobile App Development 🌟 React Native & Expo Ecosystem: Building high-performance, native-feeling apps from a single codebase. 🌟 iOS & Android Deployment: Complete setup, code signing, and publishing to Apple App Store & Google Play Store. 🌟 Web-to-Mobile Porting: Converting your existing web SaaS or Next.js app into fully functional mobile apps. 🌟 Native Feature Integration: Push Notifications, Biometric Auth (FaceID/TouchID), Camera, Geolocation, and Deep Linking. 🔐 Advanced Supabase & Backend Architecture 🌟 Database Design: High-performance PostgreSQL database design, indexing, and migration setup. 🌟 Row-Level Security (RLS): Bulletproof data isolation and security policies. 🌟 Supabase Edge Functions: Serverless APIs, background workers, and complex logic execution. 🌟 Secure Auth: Advanced setups with OAuth (Google, Apple, Github), Magic Links, and Role-Based Access Control (RBAC). 🛠 Core Tech Stack (Focused & Clean) 🌟 Frontend & Web: React.js, Next.js, TypeScript, Tailwind CSS, Shadcn/ui, Redux Toolkit, Zustand. 🌟 Mobile Development: React Native, Expo, React Navigation, NativeWind, iOS App Store, Google Play Console. 🌟 Backend & APIs: Node.js, Express.js, FastAPI (Python), RESTful APIs, GraphQL, WebSockets. 🌟 Databases: PostgreSQL (Supabase), MongoDB, MySQL, Redis. 🌟 Infrastructure & DevOps: AWS (S3, EC2), Vercel, Docker, GitHub Actions (CI/CD), Hostinger. 🌟 Integrations & Payments: Stripe (Subscriptions, Metered Billing), PayPal, Apple Pay, Google Pay, Local Gateways, SMTP, Twilio. 💼 Real Business Results (Proven Track Record) ✔ Official Museum Mobile App: Designed and deployed the official cross-platform app for the Government House Museum, integrating interactive exhibit exploration, multimedia streaming, and a secure annual membership subscription booking system. ✔ Dual-App Security Operations Suite: Engineered the "Night Watch Security" infrastructure—developing separate production-ready apps for Responders and Admins featuring secure data sync, real-time response management, and flexible payment gateway switchers (Manual & Bank Transfer configurations). ✔ Cross-Platform Event Management: Designed and deployed a seamless web and mobile application handling thousands of ticket sales. ✔ Healthcare Platform Optimization: Built a HIPAA-compliant appointment booking SaaS handling massive daily active users. ✔ Multi-Tier SaaS Monetization: Built subscription systems and scalable multi-user dashboard panels handling dynamic access controls (RBAC) and payment gateways (Stripe, Local systems). ✔ Reduced React & Mobile App Load Times by 60%: Refactored legacy architecture, optimized heavy a ✔ 150+ Successful Upwork Projects Completed with flawless feedback. 🧠 Why Clients Choose Me over Cheap Agencies 🌟 Direct & Clear Communication: Ultra-responsive (0-4 hour response time) with transparent daily updates. 🌟 Business-Focused Mindset: I care about your product-market fit, user retention, and infrastructure costs—not just lines of code. 🌟 Maintainable Architecture: Everything I hand over is documented, clean, and easily maintainable for your future team. 🌟 No Over-Promising: Just honest, high-quality, and senior-level execution. 👨‍💻 Who I Work Best With 🌟 SaaS Founders who hits a technical ceiling after using AI generation tools. 🌟 Startups & Agencies preparing for rapid user growth or pitching to investors. 🌟 Non-Technical Founders who need a reliable Technical Partner to structure their architecture. 📩 Let’s Build Something That Scales! Send me a message with your project details, wireframes, or current AI repository link. I will provide a clear technical roadmap and architectural review before we start. Best Regards, Salem

🇧🇩Chapai Nawabganj, Bangladesh$25/hr100% JSS4.70 (87)Since Mar 2020
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Earnings and projects

MRR
$5.7k

Last 6 months ÷ 6

World#4,208 / 412k
🇧🇩Country#43 / 15.0k
Revenue, last 30 days
$5.3k

Last 6 months: $34k

World#5,164 / 412k
🇧🇩Country#50 / 15.0k
Total earnings
$83k

Billed in all: $87k

World#47,746 / 412k
🇧🇩Country#1,203 / 15.0k
Per project
$533

$2.9k in the last 6 months

World#176,756 / 412k
🇧🇩Country#4,043 / 15.0k
Projects, last 6 months
12

Across 14 contracts

29% fixed71% hourly
World#14,023 / 412k
🇧🇩Country#887 / 15.0k
Projects in all
156

Across 180 contracts

64% fixed36% hourly
World#14,848 / 412k
🇧🇩Country#1,335 / 15.0k

Earnings, last 30 days

$86.6k+$5.3k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$80k$85k$90kOct 8Oct 23Nov 7

Skill rankings: Top 1% in Web Design

Ranked by MRR among everyone on Upwork with the skill.

  1. #60NestJS3,757 freelancers · 🇧🇩 #1Top 2%
  2. #61App Development2,592 freelancers · 🇧🇩 #1Top 2%
  3. #83Tailwind CSS6,978 freelancers · 🇧🇩 #2Top 1%
  4. #106FastAPI4,337 freelancers · 🇧🇩 #1Top 2%
  5. #118Supabase4,116 freelancers · 🇧🇩 #2Top 3%
  6. #128Android App Development6,395 freelancers · 🇧🇩 #3Top 2%
  7. #139iOS Development6,533 freelancers · 🇧🇩 #3Top 2%
  8. #141Front-End Development8,892 freelancers · 🇧🇩 #2Top 2%