Deepak Kumar

Full stack engineer working on performance, data modelling and integrations for high traffic products.

Four years building and running high traffic platforms: a travel booking system, a group of news sites, e-commerce. I work where performance, data modelling and the integrations between systems meet, and I led the team running a booking platform in production. I also contribute upstream, from WordPress core to a CRM in TypeScript and a Kubernetes CLI in Go.

Open source

96 pull requests accepted across 8 projects, from WordPress core to a CRM in TypeScript and a Kubernetes CLI in Go. This list refreshes daily from GitHub.

Projects

Featured

A production shaped URL shortener with real time click analytics, built to demonstrate backend engineering.

  • Redis read through cache on the redirect hot path
  • Async click pipeline that never blocks a redirect
  • Sliding window rate limiter written in Lua on Redis
  • Rotating refresh tokens with reuse detection
  • Load tested with k6, with root caused numbers rather than estimates
  • Node.js
  • TypeScript
  • Express
  • PostgreSQL
  • Prisma
  • Redis
  • Next.js
  • Docker

Experience

  1. Jul 2024 to present

    Senior Software Engineer

    rtCamp

    • Worked on a travel booking platform from its rebuild off Drupal, through launch in November 2024, to 18 months in production.
    • Led the project from July 2025, supervising the engineers on it and owning pricing, business logic and architecture decisions.
    • Migrated a news group's sites, three titles and a shared hub, onto WordPress VIP.
  2. Jul 2022 to Jun 2024

    Software Engineer

    rtCamp

    • Built and maintained WordPress platforms for a travel group, an automotive company (a migration off Adobe Experience Manager) and a dog adoption and e-commerce site (a headless React and GraphQL build).
  3. Jan 2022 to Jun 2022

    Software Engineer Intern

    rtCamp

    • WordPress theme development in PHP and JavaScript, React and TypeScript components.

Education B.E. Computer Science, Chandigarh University, 2022.

Writing

  1. Testing WP-CLI Commands with PHPUnit and Behat (opens in a new tab)

  2. I Built a Twitter-Style Feed to Find Out What Fan-Out Actually Costs (opens in a new tab) Part 2

  3. Celebrities vs. The Rest of Us: Designing a Twitter-Style Feed (opens in a new tab) Part 1

  4. Enterprise Gutenberg Blocks: A TypeScript-First Architecture for WordPress at Scale (opens in a new tab)

  5. Software Architectural Patterns (opens in a new tab)

  6. Building a Caching Proxy Server in Node (opens in a new tab)

  7. Building a CLI app in Node.js (opens in a new tab)