• I designed and developed an e-commerce backend similar to Mercado Libre using Node.js and MongoDB. • I designed and developed a backend for a loan system similar to a conventional banking system. • I designed and developed a backend for a proxy system and real-time data processing for Stripe, Hubspot, and other platforms. • I collaborated in the development of blogs and websites using WordPress with fellow colleagues during my freelance career. • I managed VPS and dedicated servers for application deployment. • I designed and developed an invoicing system for a candy distribution company.