Piyush Tyagi

Developed and maintained Python FastAPI microservices for B2B e-commerce platform. Improved Elasticsearch search with fuzzy search and relevance scoring. Optimized high-traffic APIs reducing latency by 80% and increasing throughput by 35%. Built Payment Terms module with dynamic configurations. Implemented parallelized batch migration pipeline handling 1M+ records at 1000+ docs/sec.

Led backend development for Fynix AI coding assistant with IntelliJ and VS Code extensions. Improved codebase indexing by 90%+ through embedding optimization and vector database tuning. Designed modular ETL pipelines for GitHub, GitLab, Azure DevOps, Quip, Google Docs, and BigQuery integration. Engineered large-scale data ingestion for Stack Overflow and public GitHub datasets. Built intelligent workflow using LangChain and LangGraph.

Engineered high-performance backend architectures across two early-stage B2B platforms using Java, Spring Boot, PostgreSQL/MySQL, and distributed microservice patterns. Designed Order Management System improving throughput by 70-80%. Built production-grade User Management with JWT authentication and RBAC. Developed reusable APIs for Shiprocket, Shopify, and payment gateway integrations. Automated warehouse, logistics, and design workflows reducing manual dependencies significantly. (Both companies discontinued later due to funding constraints.)