At Varosa Technology, I build backend infrastructure for a VoIP and telephony SaaS platform, including call routing, SIP infrastructure, subscription billing, and wallet systems. I designed Twilio SIP infrastructure for outbound PSTN calling, built idempotent EventBridge webhook processing, and improved GraphQL and REST API query response efficiency by 20%.
I've also delivered e-commerce and desktop applications as a freelance full-stack developer, including a platform that increased market exposure for organic regional products by 20%. My work spans Node.js, Express.js, GraphQL, PostgreSQL, MongoDB, Redis, RabbitMQ, AWS, Docker, React, and Electron.
