Roman Onishchenko

Swiss and UK client engagements (under NDA) - Improved codebase maintainability by aligning implementation with modern best practices and cleaner architectural patterns - Participated in system architecture and technical decisions across frontend and backend - Integrated AWS services (e.g., S3, EC2) into application development and deployment workflows - Increased system reliability by adding test coverage for critical application flows

- Contributed to the development and maintenance of a CMS platform for data collection and analysis - Built reusable UI components that reduced duplication and helped speed up feature delivery - Simplified legacy frontend flows to reduce duplication and make feature delivery faster and safer - Validated critical flows through manual testing

Reading platform for a US client (under NDA) - Improved a web-based reading platform, focusing on usability and performance of content-heavy pages - Maintained features using React and TypeScript, improving user experience - Optimized rendering and interaction patterns for a smoother reading experience across devices - Added unit test coverage and manually verified core user flows - Helped evolve the codebase toward better maintainability through incremental refactoring and more reusable UI patterns

- Contributed to the ongoing development of a fundraising platform, supporting donation flows and user interactions - Improved the stability of a legacy React/TypeScript codebase while extending its functionality - Implemented UI enhancements, improving usability and overall consistency of the application - Contributed backend updates in Python to support feature delivery

- Maintained company websites and product landing pages, supporting multiple software products and marketing initiatives - Built frontend functionality using JavaScript and jQuery, including development of custom plugins to extend UI behavior - Contributed to backend development using PHP and MySQL, supporting data-driven features and integrations - Improved legacy code maintainability through refactoring and more structured code patterns

Economy, Microeconomics, Macroeconomics, Philosophy, Political science etc.