At FNZ, I optimized the adviser portal’s backend search module, reducing response latency by 94%—from 30 seconds to under two—by restructuring SQL queries and adding composite indexes. I also fixed a document upload bug with transactional integrity, retries, and post-upload verification.
At FNZ, I stabilized background jobs with singleton locks, exponential backoff, and dependency chains, increasing task success from 92% to 99.9%. I worked with overseas teams to turn customer requirements into deployable features.
At SmallFare, I implemented JWT authentication and authorization middleware in Node.js and Express.js. I also led the migration from raw SQL to Prisma ORM across more than 25 API endpoints.
I built Shortly, a URL shortener with a distributed URL management system designed for millions of daily redirects, using multithreading and Redis caching to reduce latency to 5 ms. I’m a top 5% LeetCode competitor with a rating above 1800, and I work with C/C++, algorithms, and system design.
