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rahul saini

@rahulsaini

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Backend developer passionate about building scalable, high-performance systems.

India

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What I'm looking for

Looking for a role focused on Generative AI, AI agents, microservices, Node.js, and TypeScript—where innovation, collaboration, and growth are prioritized.

I'm a Backend developer with a passion for building scalable, high-performance systems—from architecting event-driven microservices to integrating AI-powered chatbots and EHR systems. I blend scrappiness with solid engineering principles

—my superpower? Relentless curiosity and obsession with shipping solutions that work and scale.

At Velotio Technologies, I led a team to build a scalable integration platform from scratch using Node.js and SQL, which improved system throughput by 40%. I designed a multi-agent architecture powered by OpenAI chat models, enabling accurate understanding of multi-intent customer queries. My commitment to enhancing system performance is evident in my work, where I successfully migrated backend systems and optimized SQL queries for large datasets.

Previously, at Hoolime, I developed a Node.js and NestJS service that automated UB04 claim generation, significantly reducing manual effort while ensuring HIPAA compliance. My technical expertise extends across various technologies, including AWS, Azure, and modern web frameworks, allowing me to create efficient and effective solutions in diverse environments.

Experience

Work history, roles, and key accomplishments

Current

Software Engineer

Current

Velotio Technologies

Aug 2022 - Present (2 years 10 months)

Built scalable integration platform (Node.js, SQL, MQs) improving throughput by 40%. Designed LangChain/LangGraph AI agent system for multi-intent queries. Secured webhooks with auth protocols. Optimized SQL queries by 10%. Migrated to Socket.IO + Redis, boosting scalability by 30%. Integrated Epic/Cerner for EHR scheduling. Used OpenAI, ReAct, TypeScript, and microservices.

Lang Chain LangGraph AWS NodeJS Next.js React RAG NestJS Swagger Redis Docker Azure Functions RabbitMQ

Software Engineer (Full Stack)

Hoolime

Mar 2021 - Jul 2022 (1 year 4 months)

Built Node.js/NestJS service for UB04 claims, cutting manual effort by 60% and ensuring HIPAA compliance. Designed optimized MongoDB APIs. Integrated OAuth2.0 for QuickBooks. Built encrypted doc API with Firebase. Developed Android app (Kotlin, Jetpack), reusable React components, GraphQL tracking, Jest (90%+ coverage), TypeScript, and microservices architecture.

MongoDB Firebase React Nest TypeScript NodeJS ExpressJS Quickbooks OAuth Kotlin

Education

Degrees, certifications, and relevant coursework

Scaler

Specialized in Software Development & Problem Solving, Software Development & Problem Solving

Completed a specialized program focusing on software development and problem-solving methodologies. Gained in-depth knowledge and practical skills in various aspects of software engineering.