Niche Marketplace
E-commerce · US scaleup · 12-person dev team
The problem
A US-based marketplace was growing fast but its JavaScript codebase had grown into 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. Designed the full performance testing pipeline. Contributed to a large-scale JavaScript to TypeScript migration, including a custom parser to accelerate the process.
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 modernizing a codebase while features keep shipping, with no freeze and no regressions, is the kind of constraint most studios avoid.
The stack
Have something to build?
We build products like this end to end, fixed price, with working software every week. Tell us what you're building and we'll set up a 30-minute call.
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