Saad Sleem

Full Stack Developer with 4+ years of experience building high-performance web applications using Node.js (NestJS, Express), Laravel, React.js, and Next.js. Skilled in designing scalable APIs, optimizing backend architectures, and delivering end-to-end solutions with clean, reusable, and reliable code.

Full Stack Developer at SigmTech (2024-06 – Present)

• Engineered and scaled robust backend systems for mobile applications using PHP (Laravel) and NestJS, designing secure, high-performance RESTful APIs and optimizing architecture for scalability and reliability.
• Developed and maintained modern web applications and dashboards using React.js and Next.js, including upgrading and managing legacy Next.js dashboards with improved performance and maintainability.
• Implemented multiple payment methods including Fathoorah, Tabby, Tamar, and other gateways, ensuring seamless and secure transactions.
• Managed deployments across multiple environments, including Ubuntu-based VPS servers, Vercel, and automated CI/CD pipelines using GitHub Actions.
• Administered and maintained live systems through hosting control panels such as Plesk and cPanel, ensuring high availability, system updates, and operational stability.

Full Stack Developer (Contract – 6 Months) at Freelance (2023-11 – 2024-06)

• Developed full-stack features across frontend (React.js) and backend services for a social media platform, enabling multi-platform posting, scheduling, role-based access (7 roles), and admin/CRM functionality.
• Engineered a real-time chat system using Node.js (Express), Socket.IO, and React.js, enabling multi-role communication, group creation, file uploads, and voice messaging.
• Designed and implemented a task management system with features such as task assignment, priorities, badges, and group organization, inspired by Trello-style workflows.

Full Stack Developer at Mc Group (2023-07 – 2023-11)

• Maintained and enhanced a legacy CodeIgniter platform for a food delivery system with three mobile applications (Customer, Restaurant, Delivery), adding new features and improving system performance.
• Upgraded Flutter apps from version 2 to 3, implementing null-safety, resolving complex migration issues, and ensuring stable builds across Google Play, Apple App Store, and Huawei AppGallery, handling rejections and deployment processes.
• Developed and improved Restaurant and Admin panels, adding features such as food product addons, customizable variations, order management, and delivery tracking.
• Integrated payment gateways and updated UIs for legacy e-commerce modules, demonstrating problem-solving skills, independent learning.

Full Stack Developer at Innces (2022-08 – 2023-07)

• Maintained and enhanced legacy PHP systems, including accounting, ERP, and hotel management applications, ensuring stability and feature improvements.
• Developed and improved Law Office project frontend using Vue.js, implementing responsive and interactive UI components.
• Built and supported social media mobile applications with Vue.js and Ionic, handling backend features such as posts, likes, friends, and other user interactions.

Bachelor of Business in Business – Alexandria University (2021 – 2025)