Shubham Kalsi
Technical Lead at Quince · Palo Alto, California
I'm a Technical Lead with six years of experience in full-stack development, specialized in React.js, Next.js, Node.js, and Spring Boot (Kotlin). At Quince, I've led the migration of our order booking architecture from Shopify to an in-house system, revamped our e-commerce platform, and built the microservices powering checkout — cart, payments, tax, and gift cards.
Before Quince, I worked at Tekion Corp building B2B ERP tooling, and at Paytm, where I owned frontend architecture across consumer products used at national scale. I care about scalable systems, developer productivity, and mentoring engineers — as much as I care about the code itself.
Featured Projects
View allOrder Booking Platform Migration
2024 - Present
Technical Lead
Led the migration of Quince's order booking architecture from Shopify to an in-house system, alongside a monorepo for shared internal packages and a cross-platform integration layer for marketing tools.
E-Commerce Platform Revamp
2022 - 2024
SDE 3
Revamped Quince's e-commerce website end-to-end — modernizing a legacy Gatsby codebase, cutting build times by 60%, and reducing delivery costs by 80%.
Latest Posts
View allBlue-Green Deployments for a Static Site: What CloudFront Actually Guarantees
There's no load balancer to flip on a static S3/CloudFront site. Here's what AWS's origin failover and invalidation docs actually promise, and what they don't.
Sales Tax Isn't a Lookup Table: What Building on Avalara Actually Taught Me
Nexus, jurisdiction, and product taxability are three separate problems before you ever calculate a tax rate. Most tax API integrations only solve one.
Idempotency Keys Are Not Just a UUID: What Stripe's Docs Actually Specify
Sending a UUID as an idempotency key isn't enough. Here's what Stripe's spec actually requires around retries, retention, and concurrent duplicates.