Usman Khalid

Full Stack Web Developer | Cross Platform Developer

Freelancer.com • Temps plein

Mar 2021 - Present • 5 yrs 4 mos

I work as a full-time freelance Cross-Platform Mobile App Developer on Freelancer.com, helping startups, businesses, and entrepreneurs build modern, scalable, and high-performance mobile applications. I specialize in developing cross-platform and native applications that deliver a seamless user experience while maintaining excellent performance, security, and scalability across multiple platforms. Core Expertise Cross-Platform Mobile App Development React Native Capacitor Native iOS Development (Swift) Native Android Development (Java & Kotlin) REST API Integration Firebase Integration Push Notifications Payment Gateway Integration Performance Optimization & Bug Fixing Apple Ecosystem Development iOS iPadOS macOS tvOS watchOS visionOS What I Deliver Cross-Platform Mobile Applications Native iOS & Android Applications Business & Enterprise Apps eCommerce Applications SaaS Mobile Solutions Admin & Customer Dashboards API & Third-Party Integrations Responsive UI/UX Secure & Scalable Architecture High-Performance Mobile Solutions I follow industry-standard development practices to build clean, maintainable, and well-structured applications that are easy to scale and maintain. Every project is designed with a strong emphasis on performance, security, reliability, and user experience, ensuring smooth functionality across different devices and operating systems. As a full-time freelancer, I believe in transparent communication, professional collaboration, and delivering projects on schedule. My goal is to build long-term relationships by providing reliable, high-quality mobile development services that help clients launch successful products, improve operational efficiency, and achieve sustainable business growth through innovative technology.

Full Stack Web Developer

Upwork • Temps plein

Feb 2021 - Present • 5 yrs 5 mos

I work as a full-time freelance **Full-Stack Web and Mobile App Developer** on Upwork, helping startups, businesses, and entrepreneurs transform ideas into scalable, secure, and high-performance digital products. I specialize in delivering end-to-end solutions, from intuitive frontend interfaces to robust backend systems and cross-platform mobile applications. ### Core Expertise * Full-Stack Web Development * React.js & Next.js * Node.js & Express.js * .NET & .NET Core * React Native * WordPress & Shopify Development * REST API Development & Integration * Database Design (MySQL, MongoDB, PostgreSQL) * Performance Optimization & Bug Fixing ### Mobile Development * iOS (Swift) * Android (Java & Kotlin) * React Native * Capacitor * macOS * tvOS * watchOS * visionOS ### What I Deliver * Custom Web Applications * Business & eCommerce Platforms * SaaS Products * Cross-Platform Mobile Apps * Admin Dashboards * API Integrations * Responsive UI/UX * Secure & Scalable Architecture * High-Performance Solutions I follow modern software engineering practices and write clean, maintainable, and well-structured code that is easy to scale and maintain. Every project is developed with a strong emphasis on performance, security, reliability, and user experience, ensuring compatibility across modern devices and platforms. As a full-time freelancer, I believe in transparent communication, proactive collaboration, and on-time delivery. My objective is to build long-term partnerships by providing reliable, high-quality development services that help clients accelerate growth, streamline business operations, and achieve measurable results through technology.