Great score on Implement LRU Cache Algorithm, Difficulty Medium
Great score on Ensuring Real-time Data Accuracy in Mobile App, Difficulty Medium
Great score on Validate Parentheses in a String, Difficulty Medium
Great score on Word Search in Grid, Difficulty Hard
Great score on Reverse Digits of a 32-bit Integer, Difficulty Hard
Developed and maintained mobile application features in React Native, improving user engagement and delivering smooth cross-platform performance.
Collaborated on Shopify storefront enhancements, integrating custom UI components and optimizing the user shopping experience.
Implemented responsive, high-performance frontend interfaces using React.js and Next.js, ensuring seamless navigation and fast load times.
Worked closely with designers and backend teams to deliver pixel-perfect, user-friendly UIs, enhancing overall usability and conversion rates.
Optimized application performance through code refactoring, caching strategies, and API integration, resulting in measurable speed and reliability improvements.
Built modern, responsive UI components using React and Tailwind CSS, ensuring consistency across devices and screen sizes.
Leveraged Tailwind’s utility-first approach to rapidly prototype and style complex layouts, reducing development time while maintaining design precision.
Delivered end-to-end web solutions by developing scalable backends in PHP/Laravel and Node.js, paired with dynamic frontends in React.js and Vue.js for optimal user experiences.
Designed and deployed microservices architecture with secure, high-performance RESTful APIs, reducing latency and improving system scalability.
Led frontend development initiatives using HTML, CSS, JavaScript, and modern frameworks, ensuring responsive designs and seamless integration with backend APIs
Engineered seamless integrations with third-party APIs, ERP systems, payment gateways, and shipping services for complex multi-store e-commerce platforms.
Enhanced frontend performance using PWA implementations, responsive design principles, and advanced caching strategies to boost engagement and load speeds.
Developed and maintained cross-platform mobile applications using React Native, integrating RESTful APIs for real-time data updates and seamless user experiences.
Built backend services and automation scripts in Python, optimizing workflows and enhancing system reliability across multiple environments.
Designed and deployed scalable cloud infrastructure on AWS (EC2, S3, Lambda), ensuring high availability and cost efficiency for production systems.
Integrated AWS services such as API Gateway, DynamoDB, and CloudWatch to streamline backend operations and enable robust monitoring.
Implemented CI/CD pipelines for Python and React Native applications, leveraging AWS CodePipeline and CodeBuild to accelerate deployment cycles.
Developed and maintained scalable backend applications using Laravel, implementing secure APIs and efficient database structures to support dynamic business requirements.
Built interactive and responsive React.js front-end interfaces, ensuring optimal performance and seamless user experience across devices.
Collaborated with design teams to integrate UI/UX elements into web applications, optimizing workflow between backend services and front-end components.
Participated in the full software development lifecycle, from requirements gathering to deployment, applying modern coding practices and version control (Git) for efficient delivery.
Built a secure and easy-to-use file-sharing platform with strong encryption, allowing users worldwide to upload, download, and store large files without hassle. Designed an intuitive interface and smooth file management experience focused on privacy and speed. Developed a scalable backend to handle unlimited transfers while keeping performance high.
Developed an AI-powered mobile app that helps users find the best discounts, promo codes, and local deals in real time. Built a smart recommendation engine and designed an intuitive interface to deliver a seamless, money-saving shopping experience.
built a prepared-meal delivery platform with customizable weekly menus, dietary options, and seamless ordering. Designed for a fresh, user-friendly, and personalized meal experience.
Built a responsive, user-centered platform offering online and in-person mental health services including therapy, psychiatry, and assessments like ADHD/Autism. Integrated easy booking, free initial consultations, and therapist matching to ensure immediate access to care.
Developed interactive, production-ready websites using a powerful no-code/low-code design platform that combines visual design with clean, exportable code. Leveraged AI-driven tools, rich animations, and real-time collaboration to speed up site development while ensuring SEO-friendly performance. Enabled clients to seamlessly prototype, design, and publish live websites in one unified tool.

Mohammad Usman Z. is senior Level Developer