Sergio J.

I don’t just code features; I take full ownership of your build. At 24, I combine the technical rigor of a Systems Engineer with the agility of a modern Fullstack Developer. My goal is to help founders and businesses transition from ideation to a live, scalable product, ensuring that every technical decision made today supports your growth tomorrow. Why work with me? Unlike developers who only focus on tasks, I bring a holistic architectural mindset to your project. Whether we are building a brand-new MVP or optimizing a system that is starting to break, I focus on building "stuff your team can actually maintain later" and creating clean, scalable code. My Tech Stack: Frontend: Expert in the React and Next.js ecosystem, building responsive, SEO-friendly, and high-performance web applications using TypeScript and Tailwind CSS. Backend: Specialized in high-concurrency and performance. I leverage Go (Golang), FastAPI (Python), and Node.js to build robust RESTful APIs and microservices. Database & DevOps: Comprehensive knowledge of PostgreSQL, SQL Server, and MongoDB, with a strong focus on query optimization and performance tuning. Beyond the Code: I am a dedicated advocate for the developer community. I run a TikTok channel focused on Backend Development and DevOps, where I’ve reached over 40,000 views and I'm building a community of hundreds of followers. This keeps me at the cutting edge of industry standards, ensuring I bring the most efficient solutions to your project. What you can expect from our collaboration: Clear and fast communication throughout the entire process. A partner who covers your project as if it were his own. Support from the initial ideation and planning to deployment and ongoing maintenance.