Vishal Yadav

About Vishal Yadav

I build backend systems that scale — and increasingly, systems that think.Over the past 4 years as a Backend Engineer at Openspace Services, I\'ve owned and shipped production systems across healthcare and logistics using Python, FastAPI, and AWS. From designing high-availability APIs handling daily orders, to migrating synchronous VM infrastructure to fully serverless architectures that cut costs by 40% — I work at the intersection of reliability, performance, and scale.More recently, I\'ve gone deep on Generative AI and LLM-powered backends. I architected and shipped a multi-tenant AI Analytics platform solo — from backend to UI — that lets business users query enterprise databases in plain English using LangGraph, Qdrant-based RAG, and a stateful multi-agent pipeline. It\'s live in UAT with a paying client and improved answer accuracy by ~25%. I\'m also building HealthBot, a conversational AI health assistant using LangGraph with an Orchestrator → Analyst → Reviewer multi-agent loop that fetches and summarises personalised health reports.What I bring to a team: Python · FastAPI · Django · REST APIs LangChain · LangGraph · RAG · Qdrant · Prompt Engineering MySQL · PostgreSQL · Redis · MongoDB AWS (EC2, S3, Lambda, SQS, SES, ECR, Textract) · Docker Celery · Redis Queues · Event-Driven Architecture RBAC · ABAC · Multi-Tenant SaaS SecurityA few things I\'m proud of: Optimised a CRM dashboard query from 6–7s to under 2s (70%+ latency reduction) using indexing + Redis caching Raised OCR extraction accuracy from 60% to 85% by migrating from Tesseract to AWS Textract Built a serverless document processing pipeline (S3 → SQS → Lambda) that cut processing time by 30% Integrated PayU payment gateway solo — webhooks, worker service, and retry-backoff logic end-to-end Mentored 2–3 junior engineers while leading independent architectural decisionsI\'m currently open to Senior Backend Engineer and Backend + AI Engineer roles at product-first companies where backend reliability and AI innovation go hand in hand. Open to opportunities — feel free to connect or message me. GitHub: github.com/vishal9-9 Portfolio: vishal9-9.github.io

Experience

1. Software Engineer

   OPENSPACE SERVICES PVT. LTD.

   Apr 2022 — Present · Mumbai, IN

   Primary backend engineer across healthcare and logistics platforms, owning systems end-to-end from architecture to production. Team Player of the Year — Openspace Services (2024)What I built and shipped: HealthMeter — Healthcare Platform & CRMEngineered high-availability REST APIs handling daily orders. Integrated PayU payment gateway single-handedly — designed webhooks, developed a backend worker service, and delivered retry-backoff logic for reliable payment status sync. Optimised CRM dashboard queries from 6–7s to under 2s (70%+ latency reduction) via indexing, join elimination, and Redis caching (5s TTL). FreightMate — Logistics Document ProcessingDesigned and deployed full AWS serverless infrastructure from scratch (EC2, S3, Lambda, SQS, SES, ECR, Textract). Migrated from synchronous VM to serverless — cutting infrastructure costs by 40% and processing time by 30%. Raised OCR accuracy from 60% to 85% migrating Tesseract to AWS Textract. Engineered S3 → SQS → Lambda async pipeline for parallel document processing. Notification EngineArchitected a centralised notification service supporting SMS, Email, Push, and WhatsApp using FastAPI with dependency injection. Deployed Redis-backed Celery async queues for high-throughput delivery. AI Analytics — LLM-Powered Query PlatformSole engineer on a multi-tenant SaaS platform — natural language queries over enterprise DBs, no SQL. Built stateful multi-agent system: LangGraph (Orchestrator → Analyst → Reviewer)+ Qdrant RAG. Improved accuracy ~25%. RBAC, ABAC, row-level security. Live in UAT with a paying client.Tech: Python · FastAPI · LangChain · LangGraph · RAG · Qdrant · MySQL · PostgreSQL · Redis · AWS (EC2, S3, Lambda, SQS, ECR, Textract) · Docker · Celery · Microservices · RBAC · PayU

Education

• Lovely Professional University (LPU)

  Master of Computer Applications - MCA, Computer Science

• Thakur College of Science & Commerce

  Bachelor's degree, Computer Science

  2018 — 2022