João Corrêa Buschinelli — Backend Engineer

I’ve always been drawn to solving hard problems, whether in physics, cybersecurity, or software engineering. I don’t just write code; I build efficient, secure, and scalable systems. My career spans low-level programming, backend architecture, and cybersecurity research, with a fair share of reverse engineering and bug hunting along the way. My background is a bit unconventional. I started in physics and cosmology research, where I spent years analyzing data from the early universe. I built statistical estimators in Python, worked on the 21cmFAST project, and mentored students. But at some point, I realized I wanted to create things, not just analyze them. So I shifted gears. Now, I build real-world software. At UMobile, I led the development of a .NET-based access control system, integrating it with Hikvision facial recognition cameras, resulting in a 94% improvement in car flow efficiency. At Orbium, I built Go-based security tools, automated penetration testing audits, and implemented custom authentication solutions to harden internal applications. My work has also led to multiple CVE discoveries, from remote code execution exploits to session hijacking vulnerabilities in open-source software. Beyond my job, I have a passion for game engine development. I’m building Flatearth Engine, a performance-focused 2D engine in C++, leveraging Vulkan and custom memory management techniques. It’s a long-term passion project that merges my love for low-level programming with creative problem-solving. One more thing before we connect: I also work as a freelancer, developing secure and scalable solutions for various clients. I’ve built two fully functional e-commerce platforms from the ground up with help of PHP and JavaScript. I don’t just write software. I analyze, break, and improve it. If you’re into systems programming, cybersecurity, or performance engineering, let’s connect. 🔹 Portfolio: https://codigocaotico.com/ 🔹 CTF Write-ups: https://alexbsec.github.io/ 🔹 GitHub: https://github.com/alexbsec/

Stackforce AI infers this person is a Backend Engineer with expertise in Fintech and Cybersecurity.

Location: São Paulo, São Paulo, Brazil

Experience: 6 yrs 11 mos