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Andrii Kasian

Senior Frontend Engineer specializing in React/TypeScript, architecture, and design systems

RemoteSenior Frontend Developer11 years experienceSeniorSaaSIT Service Management (ITSM)Artificial Intelligence
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About

Frontend engineer/lead with deep React + TypeScript experience who has built complex workflow-style interfaces (node/connection editor with debugging panel) and used RxJS to manage intricate event/state flows. Strong focus on scalable architecture (SOLID, separation of concerns), performance at scale (caching, pagination, virtualization), and reliability (memory leak investigation and cleanup), backed by disciplined code review and documentation practices.

Experience

Senior Frontend DeveloperSysAid
Front‑end Development Team LeadABCloudz
Lead Front‑end EngineerVideal
Software EngineerExadel
Front‑end DeveloperCalm Lion
Front‑end DeveloperGrowth Web Development

Key Strengths

  • End-to-end frontend architecture ownership (tech selection, state management, folder structure, API interactions)
  • Scalable, maintainable design using SOLID and separation of concerns (business logic vs UI)
  • Advanced React performance optimization (memoization, virtualization, caching, pagination, avoiding re-renders)
  • Built complex workflow editor UI (nodes/connections, configuration, debugging panel) in React + TypeScript
  • RxJS-based state/event architecture for complex event flows and real-time updates
  • Debugging and resolving memory leaks via lifecycle/effects/subscription cleanup
  • Quality enforcement via documentation, shared principles, and mandatory code reviews
  • Fast-paced delivery using incremental changes, basic QA checks, gradual rollout, and rapid iteration

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Contact

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Languages

English

Skills

ReactTypeScriptJavaScript (ES6+)HTML5CSS3SCSSRedux ToolkitGraphQLAsynchronous data flowsComponent-based designReusable UIFrontend architectureStorybookRemixVite