S.M. KhalidMahmud

Contributing to the development of web and mobile applications across e-commerce, POS, news and television, and SaaS products, delivering end-to-end features across frontend, backend, and mobile platforms.

• Developed and maintained e-commerce platforms, contributing to frontend, backend, API integration, and business features.
• Built and enhanced Point of Sale (POS) systems to support business operations and transaction workflows.
• Contributed to news and television platforms, delivering responsive web experiences and application features.
• Worked on SaaS products, developing scalable and reusable features for web-based business applications.
• Developed cross-platform mobile applications using React Native, integrating APIs and implementing user-focused mobile experiences.
• Developed and integrated RESTful APIs and worked across frontend and backend systems to deliver end-to-end features.
• Collaborated with team members to design, develop, debug, and optimize applications across web and mobile platforms.

Contributed to the development and maintenance of VISAThing's visa processing platform, delivering end-to-end features across both frontend and backend systems to improve performance, scalability, and user experience.

• Developed and maintained scalable backend services using NestJS, designing RESTful APIs for visa processing workflows and application tracking.
• Designed and optimized database schemas and queries using PostgreSQL, improving data integrity and query performance.
• Built and enhanced responsive UI components for visa application tracking, following mobile-first design principles.
• Ensured cross-browser compatibility and improved accessibility standards across the platform.
• Collaborated closely with UX/UI designers and backend engineers to deliver consistent and user-friendly features.
• Debugged and resolved performance bottlenecks using browser dev tools, logging, and profiling techniques across both frontend and backend.
• Contributed to improving system reliability through better error handling, validation, and API response structuring.

Contributed to the development and maintenance of UniClient Technologies platform, enhancing usability and performance for businesses managing client relationships.

• Built and optimized interactive UI components to improve user engagement and platform efficiency.
• Developed reusable and modular frontend components to streamline development and ensure consistency.
• Integrated RESTful APIs and managed state efficiently with TanStack Query for better performance.
• Enhanced application responsiveness and cross-browser compatibility for a seamless user experience.
• Worked closely with backend engineers to ensure smooth data flow and API integrations.
• Debugged UI inconsistencies and optimized rendering performance using browser dev tools.
• Assisted in implementing accessibility improvements to ensure inclusivity for all users.
• Followed best practices in mobile-first development to enhance usability across devices.

Contributed to the development of web applications using React, focusing on building responsive user interfaces, reusable components, and seamless API integrations.

• Developed responsive and reusable React components following modern frontend development practices.
• Integrated RESTful APIs to enable dynamic data flow between frontend applications and backend services.
• Implemented responsive user interfaces with a focus on usability and cross-browser compatibility.
• Debugged and resolved UI issues to improve application stability and user experience.
• Collaborated with team members to implement and deliver frontend features.