Usama S.

VoIP & WebRTC Developer

Oct 2025 - Present • 8 mos

Developing VoIP and WebRTC solutions for businesses and startups, including call center systems, IVR automation, and real-time communication platforms. Experienced with FreeSWITCH, FusionPBX, and AI-powered call workflows, integrating telephony with web dashboards and backend systems. Delivering reliable, scalable, and maintainable communication solutions with clear documentation and client-focused support.

Full Stack Web Developer

Jan 2024 - Oct 2025 • 1 yr 9 mos

I have extensive experience building responsive, scalable, and high-performance web applications using modern full-stack technologies, including Angular, Node.js, Next.js, NestJS, Java Spring Boot, MongoDB, PostgreSQL, Supabase, and MySQL. My work focuses on delivering user-friendly interfaces paired with robust, secure backend systems that support real business operations. I have built and maintained full-stack HR platforms and internal enterprise applications using MERN, MEAN, and Ruby on Rails architectures. These systems supported 100+ active users, featuring role-based access control (RBAC), secure authentication, dynamic form handling, and responsive UIs optimized for both desktop and mobile devices. Through backend optimization and efficient API design, I significantly improved operational workflows and reduced API response times, resulting in better system performance and usability. On the backend, I specialize in designing and developing RESTful APIs, implementing clean architecture, modular services, and scalable database schemas. I have strong experience working with relational and NoSQL databases, ensuring data integrity, performance optimization, and maintainability across growing applications. I also build custom dashboards and admin panels to provide real-time insights and streamlined management for business users. Additionally, I have implemented two-way integrations between Jira and Redmine, enabling real-time, bidirectional synchronization of tasks, issues, and project data. This involved building modular integration services, handling webhooks, managing sync conflicts, and ensuring reliable data consistency across platforms. Throughout all projects, I prioritize clean, maintainable code, clear documentation, and proactive communication with stakeholders. I follow best practices for version control, testing, and deployment to ensure timely delivery and long-term reliability.