Sumit Rai
Portfolio · 2026

Hi, I'm Sumit Rai. Sr Principal Software Engineer at Yahoo Building scalable web experiences at global scale.

I lead frontend architecture and engineering for large-audience web products. I care about craft, performance, and teams that ship with clarity.

View Experience
Based in Sunnyvale, CA
Experience

A decade of shipping at scale.

Roles, teams, and the problems I've been working on.

  1. Principal Software Engineer

    2022 — Present
    Placeholder Co. Sunnyvale, CA

    Lead frontend architecture across a portfolio of high-traffic consumer products. Drive platform direction, performance, and engineering standards.

  2. Senior Software Engineer

    2018 — 2022
    Placeholder Co. Sunnyvale, CA

    Shipped core features and infrastructure for a flagship finance product. Partnered with design and product to deliver measurable user impact.

  3. Software Engineer

    2016 — 2018
    Placeholder Inc. Sunnyvale, CA

    Built and scaled critical web surfaces serving millions of users. Introduced testing, tooling, and performance wins.

  4. Software Engineer

    2015 — 2016
    Placeholder Inc. Sunnyvale, CA

    Migrated a legacy stack to a modern component-driven architecture. Owned developer experience and release pipelines.

  5. Software Engineer

    2013 — 2015
    Placeholder Studios Bangalore, India

    Full-stack work across consumer web properties. Data pipelines, service integrations, and frontend foundations.

Craft

Things I reach for.

A working toolkit — opinionated, practical, and always shifting.

Frontend

  • React
  • Svelte
  • TypeScript
  • Next.js
  • CSS Architecture
  • Web Performance

Backend

  • Node.js
  • GraphQL
  • REST APIs
  • System Design
  • Caching
  • Observability

Platform

  • AWS
  • CI/CD
  • Edge & CDNs
  • A/B Testing
  • Design Systems
  • DX Tooling
Contact

Have an idea worth making?

I'm always happy to chat about engineering leadership, platform work, or a web product you're trying to ship well.