Timofej Ratsko

Recently joined Cloudflare as a software engineering intern, working on infrastructure and developer tools.

Full-time software engineering role building and scaling the company's web platform and internal tooling.

• Rearchitected the front-end interface to streamline integration with multiple data sources.
• Built a robust Java-based data pipeline to transfer and translate mission activity plans between two mission planning systems supporting NASA's Psyche asteroid mission.
• Processed and validated 50,000+ scheduled spacecraft activities by creating a new tool used by mission planners.
• Integrated JSON parsers and Java Object mappers to ensure accurate end-to-end data transformation.

• Cut page load speed by 50% through redefining REST endpoint instantiation logic.
• Reduced API requests by up to 50% by implementing pagination and removing redundant calls.
• Improved customer experience by building React.js configuration pages to simplify app usage.
• Enhanced dashboard reporting with aggregate endpoints and SQL-based filtering, enabling real-time order metrics.

• Led development of a video publishing platform for 100+ users to upload, share, and customize content.
• Built and maintained a RESTful API using TypeScript and Firebase, handling over 1,000 daily requests.
• Increased system reliability with 85% test coverage utilizing unit tests.
• Streamlined collaboration, resolving 50+ merge conflicts and maintaining code quality.

• Achieved 95% accuracy in predicting user age and gender through hyperparameter tuning with Scikit-learn.
• Implemented ML algorithms including logistic regression, Naive Bayes, and decision trees using Pandas.
• Explored neural network architectures with perceptrons and TensorFlow.

• Built an online sandbox game without external game engines using Vanilla JavaScript, HTML, and CSS.
• Designed a procedural world generation system capable of rendering environments spanning over 4 million tiles.
• Optimized performance to support 1000+ dynamic entities in real-time gameplay.

• Built a full-stack messaging platform enabling 100+ users to send and receive over 1,000 messages daily.
• Developed 10+ RESTful services in Node.js for real-time communication.
• Integrated PlanetScale-hosted MySQL for consistent data reliability and uptime.