Kazi Hasan A.

⭐️ Top Rated Plus - Top 3% of talent on Upwork 🕒 3,000+ hours on Upwork ✅ Have worked with Marriott, Oxford University Press, ASDA ✅ 12+ years of experience ✅ 82+ projects delivered I’m skilled in creating seamless web and mobile applications, MVPs for startups, and SaaS platforms. Whether you're looking to launch a product, optimize your existing application, or automate business processes, I deliver solutions that are not only technically robust but also user-friendly and future-proof. ------------------------------------------------------------------------- 🛠️ Skills and Expertise Frontend Development: React.js / Next.js / Vue.js / Tailwind CSS / Material UI / JavaScript (ES6) / TypeScript / HTML5 / CSS3 / Progressive Web Apps (PWA) / Responsive Web Design Backend Development: Node.js / Express.js / NestJS / Python / Django / Ruby on Rails (RoR) / Microservices Architecture / Serverless Architecture Database Management: MySQL / MongoDB Atlas / PostgreSQL / SQLite / NoSQL / Amazon DynamoDB Mobile App Development: React Native / Expo / Flutter / Android Development / iOS Development / Cross-Platform Development / Real-Time Communication Apps / Video and Audio Call Applications Cloud and DevOps: Amazon Web Services (AWS) – AWS Lambda, AWS S3, AWS EC2 Google Cloud Platform (GCP) – Google Cloud Functions, Firebase Hosting, Firebase Cloud Functions, Firebase Cloud Messaging (FCM) Docker / Kubernetes / CI/CD Pipelines (Jenkins, CircleCI) API Integration and Third-Party Services: REST APIs / GraphQL / Stripe API / Shopify API / Twilio / Auth0 / OpenAI Integration / Third-Party API Integration UI/UX Design: Figma / Responsive Design / User-Centric Interfaces / Tailored UX/UI Solutions ------------------------------------------------------------------------- 🌟 Notable Achievements 1. Developed an MVP for Artoh, securing $1M in funding, and empowering e-commerce businesses with real-time financial insights. 2. Built a shipping automation system capable of processing over 100,000 invoices daily with seamless NetSuite integration and serverless architecture. 3. Delivered cutting-edge solutions like a custom T-shirt printing app, a PWA for real-time order tracking and an ebook designing platform. 4. Implemented real-time communication features such as video and audio calls using Socket io ------------------------------------------------------------------------- 🔑 Comprehensive Services Offered Reactjs Development / React Native Development / Node.js Backend Development / Full-Stack Application Development / Real-Time Communication Apps / Serverless Architecture / Cloud-Native Applications / API Integration / Custom Dashboards / MVP Development / SaaS Platform Development / Tailored E-Commerce Solutions / Payment Gateway Integration / UX/UI Optimization / Shopify API Integration / Mobile App Development ------------------------------------------------------------------------ Keywords Web Developer | Web Development | Mobile App Developer | Mobile App Development | SaaS Developer | SaaS Development | MVP Development | Backend Developer | Backend Development | Frontend Developer | Frontend Development | API Integration | Third-Party API Integration | REST APIs | GraphQL | Progressive Web Apps | PWA Development | Serverless Architecture | AWS Developer | Google Cloud Developer | Firebase Expert | Cloud-Native Applications | Cross-Platform Development | Video Call Apps | Stripe API Integration | Shopify API Integration | Payment Gateway Integration | E-commerce Developer | E-commerce Development | Microservices Architecture | Docker | CI/CD Pipelines | Tailwind CSS | Material UI | Figma | Responsive Design | MERN Stack Developer | MongoDB Developer | MySQL Developer | PostgreSQL Expert | NoSQL Databases | SQL Developer | AWS Lambda | AWS S3 | Firebase Cloud Functions | Firebase Hosting | TypeScript | JavaScript Developer | Python Developer | Django Developer | Ruby on Rails Developer | OpenAI Integration | Socketio | Shopify Expert | Shopify App Integration | Stripe Checkout | Redis | Puppeteer | Android Development | iOS Development | Vuejs | Custom Dashboards | Firebase Cloud Messaging | Firebase Firestore | SaaS Platforms | Shopify Store Setup | Firebase Development | Twilio Integration | Auth0 Integration | SEO Optimization | Web App Development | Mobile App Prototyping | UX/UI Optimization | User-Centric Design | Business Automation | Multi-Tenancy Applications | Agile Software Development | Payment APIs | Stripe API Expert | Shopify App Development | Vercel | Expo | Firebase Analytics | Redis Integration