Yacine F.

I'm a senior full-stack developer with 7+ years of experience building and scaling web and mobile applications. With over $100K earned on Upwork, I've built a track record of delivering real, measurable results for every client I work with. My core stack spans the JavaScript/TypeScript ecosystem — React, Next.js, Node.js, Express, and NestJS — alongside Rust for performance-critical systems and Flutter for cross-platform mobile apps. I don't just write code; I improve what's already there. For past clients, I've redesigned system architectures to handle growth and optimized API response times by up to 10x. What sets me apart is that I treat every engagement like I'm part of your team, not an outsider passing through. I thrive in long-term partnerships where I can deeply understand your product, spot bottlenecks before they become problems, and push the codebase forward with confidence. Most of my clients started with a single project and kept me on because I became an asset they didn't want to lose. If you're looking for a reliable senior engineer who can own features end-to-end—from database design to pixel-perfect UI—let's talk.