Firas Hmedi

• • Designed and developed responsive, user-friendly features with a strong focus on security, UX, and performance, improving page load speeds by 30% and reducing UX friction. The application supports millions of users files.

• • Developed a React web application with a Node.js backend for Mainframe environments, improving page load times and maintaining 99.9% uptime. Backend later pivoted to agentic approach using Python.

• • Managed AWS services (ECS, EC2, S3, RDS, Lambda), optimizing scalability and costs, reducing storage costs by 30%, and improving database performance with auto-scaling and serverless architecture.

• • Built and maintained over 50+ end-to-end integration tests using Cypress and Playwright, reducing critical bugs by 40%, while also documenting test cases and technical features, leading to a 25% reduction in onboarding time for new developers.

• • Integrated Mapbox for interactive map displays, incorporating driving directions, real-time traffic updates, and multiple viewing angles, enhancing user navigation and increasing engagement by 25%.

• • Designed and implemented an offline mode using custom middleware to handle user actions and synchronize data later, boosting application usage by 20% by improving user retention in low-connectivity environments.

• • Developed a robust file management system for viewing and storing various media files (Images, Videos, PDFs).

• • Created end-to-end encrypted chat module for group messaging by employing cryptographic algorithms. The tech stack is React Native with Typescript, and Firebase.

• • Created a group video call system with WebRTC supporting up to 8 people in a call that is end-to-end encrypted, and maintained the general stability and fault-tolerance of the application.