Karim S.

I’m a freelance full-stack software engineer with strong experience in building scalable, high-performance web applications using modern technologies like Next.js, Node.js, and SpringBoot.

I’ve worked with international clients to design, develop, and deploy production-ready applications, focusing on performance, security, and user experience. One of my key projects was rebuilding the EPCO Group website , where I reduced the homepage size from 8MB to 1MB (making it 8× faster on mobile), significantly improved technical SEO to achieve a #1 Google ranking, and built a full marketplace with bilingual support and adaptive theming.

Beyond freelancing, I currently work as a Backend Engineer where I develop and optimize backend services, improve database performance, and implement secure, scalable architectures.

I’m comfortable taking projects from idea to deployment, whether it’s building full-stack platforms, designing APIs, or optimizing existing systems for speed and scalability. My focus is always on delivering clean, maintainable code and real business impact.