Niche Marketplace
E-commerce · US scaleup · delivered inside a 12-engineer team
The problem
A US-based marketplace was growing fast, but its JavaScript codebase had become a bottleneck. They needed to scale core product features, improve conversion, and modernize - without stopping feature delivery.
What we did
Shipped core e-commerce features, rebuilt the search system for better conversion, and stood up the analytics infrastructure from scratch. Built the process that catches slow pages before customers ever hit them. Helped move the codebase from JavaScript to TypeScript, a safer and harder-to-break foundation, and built a tool that automated the riskiest, most repetitive parts of the switch.
The result
Rebuilt search for conversion and modernized the codebase while features kept shipping. No pause, no regressions.
An honest note
This build predates Elypsum and was delivered during an earlier engagement, so the client stays anonymous. The outcomes are real. We include it because staying inside a live, fast-shipping team and modernizing the codebase with no regressions is the kind of discipline most studios avoid.
The stack
More work
Have something to build?
We build products like this: fixed price, weekly milestones that pass their agreed checks or you don't pay for that milestone, and a 12-month warranty on bugs after delivery.
Tell us what you're building and we'll set up a 30-minute call.