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

MSc focused on Software Engineering and modern web development.

Focus on enterprise economics, financial analysis, and business management.

Foundation in economics, financial analysis, and business management.