Praveen Kumar
I build frontend platforms and write about how they work.
Senior frontend engineer at TestReach. Migrating our app from Angular 12 to 20, rebuilding the design system, and keeping prod stable while we do it. Before that: founding engineer at Jarvio, L3→L4 at Quizizz. I write long internals posts when a runtime or framework surprises me.
Work log
Full history →Senior frontend engineer — currently leading an Angular 12→20 migration and design-system rebuild at TestReach.
Senior Frontend Engineer
TestReach
Founding Full Stack Engineer
Jarvio
Writing
All writing →Ripple internals
Compile-time reactivity, block trees, and update propagation — the kind of post that is probably too detailed for most people.
Read the series →Setting up Metacall development environment on Windows
MetaCall is open-sourced under Apache 2.0 license. Let's switch gears and setup our windows system to build and develop metacall locally.
Polyglot Programming with Metacall
Calling Python from Node without spawning a subprocess. Metacall loads foreign functions through a shared C ABI.
Builds
All projects →lgtm-but
A parody PR-review generator — simulate getting reviewed by every archetype of code reviewer.
PresentBuddy
Free, open-source macOS utility that preps your screen for professional presentations in one click.
Blurverse
Browser extension to blur elements, text, and areas on any webpage — for screen sharing and content redaction.