I engineer the parts users feel and teams have to live with.

A growing React/Next.js product surface had to stay coherent while 10+ modules evolved in parallel for a platform serving 1–3M users.

Built a shared React/Next.js component library and a type-safe REST/GraphQL API layer with NestJS — standardizing strict TypeScript, WCAG AA compliance and shared product workflows so new features could start from an established system instead of local conventions.

The architecture reduced feature implementation time by roughly 30% while creating a stronger base for cross-module development.

High-traffic screens were slowed by work happening across rendering, data fetching, caching and asynchronous UI flows rather than one obvious bottleneck.

Optimized the full request-to-render path: rendering behavior, caching, async orchestration and API request patterns, then backed the work with Core Web Vitals, Lighthouse, tests and Sentry monitoring.

Average page load time moved from about 3.2 seconds to 2.1 seconds while the platform continued to evolve.

Dense GIS interfaces had to render and manipulate datasets containing roughly 300K–500K geospatial objects without making the first interaction feel delayed.

Restructured layers and styles, introduced clustering and client-side filtering, and tightened the data path between the React state layer and Elasticsearch to eliminate repeated work.

Initial Mapbox GL JS rendering dropped from about 800ms to 480ms, with a 30% improvement in geospatial search response time from separate algorithm work.

Dozens of regional GIS products shared recurring UI and data patterns, but repeated implementations made delivery slower and consistency expensive.

Created a centralized React architecture using Feature-Sliced Design, with 100+ reusable components documented in Storybook, then standardized TypeScript, theming, role-aware patterns, linting and test practices around it.

Similar implementation work dropped by up to 50%; some launches that previously took about a month could be completed in roughly a week.