Skip to Content

Hi, my name is

Ivan Donyk

Senior Full-Stack Engineer | React, Next.js, Node.js, Python, Angular | AWS & GraphQL | AI-Powered Systems | Fintech · Edtech · Healthcare · Web3

About Me

I'm passionate about delivering scalable APIs, interactive dashboards, and polished UIs. I have extensive experience in fintech, financial services, education/edtech, logistics, SaaS, AI platforms, and enterprise software. I specialize in React, React Native, Next.js, Node.js, TypeScript, Python, Angular, and Laravel. I have extensive experience architecting event-driven systems with AWS, GraphQL, and OpenAI APIs.

Avatar

My Experience

Senior Full Stack Developer Levels

  • Built high-performance, interactive dashboards using React 18, TypeScript, and Recharts for visualizing complex time-series data (glucose metrics, diet, sleep).
  • Built a serverless backend on AWS, utilizing API Gateway, Lambda (Node.js), and AppSync to deliver personalized health insights via scalable GraphQL and REST endpoints.
  • Designed and managed DynamoDB tables with optimized GSIs and LSIs for efficient querying of user data, leveraging S3 for secure storage of larger analytical datasets.
  • Implemented real-time data streaming and live notifications using WebSockets and AWS AppSync subscriptions, with background processing handled by Lambda functions triggered via SQS.
  • Achieved significant frontend performance gains through React.memo, useCallback, virtualized scrolling (react-window), and lazy loading of chart components, reducing main-thread blocking.

My Portfolio

What’s Next?

Get In Touch

I'm looking for the next challenge and opportunity. Feel free to reach out to me if you're interested in working with me.