William Karkegi

Fullstack Developer: Boost your web presence with Next.js, React, and NestJS

Looking for a scalable web app that converts your visitors into engaged customers, while seamlessly handling traffic spikes? I can help you by designing custom fullstack solutions tailored to your business needs.

As a fullstack developer, I build innovative web projects. I use Next.js for high-performance, SEO-optimized frontends, React for fluid and immersive interfaces, and NestJS for robust and secure backends. I integrate TypeScript for reliable code, React Native for native mobile apps, and tools like Prisma, Drizzle, or TailwindCSS for a modern stack.

At 404 Place Vendôme, I developed a digital platform on Next.js and TypeScript for a high-end jewelry house, integrating Shopify for custom e-commerce. This streamlined custom orders, boosting user experience by 30% according to customer feedback. At InterFast, as CTO, I architected a SaaS management system for the construction industry with NestJS for the backend and React for the frontend, saving 4 hours per employee per week on scheduling and billing. At STEAMULO, I coded a cybersecurity app in React.js and Python to detect threats in real-time, analyzing thousands of suspicious domains with precision.

My method? An initial discovery session to align on your goals, followed by agile iterations with CI/CD via GitHub Actions – with testable prototypes every week for joint validation. My strength: a DDD and Clean Architecture approach that makes your code scalable, ready for generative AI or cloud deployments (AWS, Google Cloud, Azure), without compromising security or performance.

Ready to accelerate your digital transformation? Contact me, I'll respond within 24 hours to evaluate your project.