Hi, I'm Aditya

• •Built CodeArena, a full-stack MERN online judge, from the ground up, compiling and running hundreds of code submissions safely
• •Engineered sandboxed execution and a submission queue so concurrent submissions run in isolation without one bad infinite loop taking down the system
• •Applied distributed systems thinking to keep the judge stable under contest load when many users submit at the same time

CodeArena was where distributed systems stopped being a resume buzzword for me. Watching the queue hold steady while fifty people submit at once during a contest taught me more than any lecture could.

• •Built a real-time voice AI agent for live phone calls, where half a second of dead air is the difference between natural and broken
• •Reduced text-to-speech time-to-first-byte from 691ms to 200ms by switching the TTS provider to ElevenLabs
• •Brought the full speech pipeline under 800ms end to end by rethinking how STT and TTS buffer and stream instead of waiting on each other
• •Tracked down and fixed a production echo bug that only ever surfaced on live calls, never in testing
• •Built the campaign engine now driving 1000+ outbound calls and cutting manual collections work by 60%

The echo bug taught me to respect the gap between a clean test harness and a live phone line, because it never reproduced anywhere except real calls. Shaving milliseconds off latency sounds trivial until you are the one sitting in the dead air.

• •Hardened the client's REST APIs against injection and broken-auth gaps with proper JWT handling and input validation instead of trusting the frontend
• •Cut API latency by 35% through caching and cleaning up SQL queries that were doing far more work than they needed to
• •Built client-facing React dashboards and shipped in Agile sprints with CI/CD

This was my first time securing APIs that real users' data depended on, and it reset how seriously I take input validation. It also drove home that a fast backend means nothing if the UI rendering it feels sluggish.