Subhash Halder

Background

About Subhash Halder

Highly proficient Polyglot Engineer with over a decade of experience architecting, developing, and deploying high-performance, scalable full-stack applications and backend systems. My expertise spans a diverse technology stack including JavaScript, TypeScript, Rust, Go, Node.js, React, GraphQL, Microservices, and cloud platforms (GCP, AWS ecosystem tools). I have a strong track record of delivering impactful results, including a successful Proof of Concept demonstrating a potential 60% server cost reduction by migrating Node.js GraphQL subgraphs to Rust, and achieving approximately per month in cloud storage cost savings through optimized logging mechanisms. I also led the zero-downtime migration of over 2 billion rows of data. I am passionate about performance optimization, evidenced by my work on CPU profiling and memory heap snapshots for Node.js in production, and the development of a highly scalable rate limiter. I am also an active open-source contributor to the popular Mermaid JS library, where I've led the design and implementation of new diagram types. Currently a Senior Software Engineer at Walmart Global Tech India, I am eager to connect with opportunities for a challenging Staff Software Engineer role where I can leverage my diverse language skills and drive significant engineering impact.