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Ivan Tymokha

@ivantymokha

Message

Backend Developer at ITWebDevelopmentLimited who cut third-party API calls ~8× and service costs ~3×.

Romania

Message

At ITWebDevelopmentLimited, I refactored microservices to cut paid third-party API calls by ~8× and associated service costs by ~3×. I also created Claude Code and Codex agents for code review and test generation that were adopted team-wide.

I built backend services and a WebSocket relay supporting 3,000+ concurrent users on a single upstream connection. Earlier, as a Frontend Developer, I built a multichain transactions protocol frontend that grew to 320,000+ unique users.

Experience

Work history, roles, and key accomplishments

Current

Backend Developer

Current

IT Web Development Limited

Dec 2023 - Present (2 years 10 months)

Designed and maintained scalable backend services in Node.js, NestJS, and Express.js, supporting high-load traffic of 1.5M+ transactions. Refactored microservices to cut third-party API calls by ~8x and costs by ~3x, and introduced Jest testing and CI/CD pipelines.

NodeJS NestJS ExpressJS TypeScript REST APIs WebSockets Microservices Event Driven Architecture PostgreSQL Redis RabbitMQ Kubernetes Docker AWS GitHub Actions Jest SOLID Clean Code

Frontend Developer

IT Web Development Limited

Nov 2022 - Dec 2023 (1 year 1 month)

Built and scaled a multichain transactions protocol frontend in Next.js, growing to 320,000+ unique users. Optimized performance, migrated components to TypeScript, and implemented real-time features with WebSockets.

Next.js React TypeScript JavaScript Redux WebSockets Performance Optimization Code Splitting Lazy Loading Server Side Rendering

Frontend Developer

Oxios

Sep 2021 - Nov 2022 (1 year 2 months)

Delivered cross-platform interfaces for iOS, Android, and web. Developed 6+ mobile and web applications using React and React Native, and improved admin panel UX.

React React Native HTML CSS SASS ESLint Prettier React Navigation