Lead Search Engineer (Freelance)
ApnaMart.inDec, 2024 - May, 2025 5 months
Spearheaded the architecture, development, and scaling of a robust search system using Elasticsearch, achieving a throughput of 200 requests per second. Enhanced relevance ranking by designing and integrating a scoring system with calculated and custom boosts (MPS, UPS, SKS, CBS, CSS), experimenting with Normalized Weighted Multiplicative and Exponential scoring models. Optimized performance to reduce p90 latency from 1.4s to 100ms through database query and caching optimizations via Elasticsearch tuning, conducting extensive stress and load testing. Established comprehensive performance and error monitoring using centralized logging (Sentry, Elasticsearch Explain API) for proactive issue detection and resolution. Contributed to search infrastructure optimization for low latency and high throughput, streamlining CI/CD pipelines, and implementing liveness/readiness APIs for system health checks. Integrated third-party tools like GrowthBook for feature flagging and A/B testing to drive continuous search improvement.