Hayk Ter-Markosyan

I’m a Frontend Developer with 5+ years of experience building data-rich dashboards and interactive UIs across web and mobile, with a deep focus on the modern JavaScript ecosystem. I architect reusable component systems and data-visualization libraries, and I take ownership of features end to end—from data model to UI.

At Totango, I built a shared React/Vue component layer that let feature teams across three enterprise apps consume one versioned internal package instead of re-implementing the same UI elements. I designed an API integration layer on TanStack Query with query-key-scoped caching and in-flight deduplication, cutting redundant API calls by ~40%, and I led the Vuex-to-Pinia migration to remove mutation side-effects that caused cross-module state bugs.

I also drive AI-assisted delivery workflows: I defined repository structure, agent and prompt conventions, and code-review automation for AI-assisted feature work through the Catalyst initiative. In parallel, I helped build product-ready data visualization and interaction capabilities at Nsoft, including reusable chart components with theming tokens and instrumentation for hover and drill-down engagement.

Earlier, at HippoCamera, I architected an end-to-end memory-capture platform—React Native mobile app, Strapi backend, and a TanStack Start admin dashboard—owning the full data flow from on-device capture to admin review. I built an Expo Router–based offline-first app, implemented recording and upload queues with presigned URLs, notifications, and geolocation, and developed a custom offline-first sync queue with per-action state transitions and retry logic; I also wrapped Figma into an MCP-driven design-to-code workflow and automated mobile UI tests with Maestro.