YAROSLAV DENISOV

Led frontend development of a Developer Portal for API onboarding and integration. Rebuilt OpenAPI workflows, reducing processing time by ~40% and improving publishing reliability. Migrated legacy UI to a modern React + TypeScript component architecture. Leveraged AI tools to accelerate research, refactoring and code reviews. Enhanced DX via CI/CD, documentation and tooling, while mentoring engineers and supporting hiring.

- Built public pages and reusable UI components for Lido’s DeFi ecosystem using React and TypeScript - Developed an internal QA dashboard to validate smart-contract-related features and workflows - Integrated Netlify CMS and improved content delivery performance (~2×)

- Improved UX for VK’s family-friendly email platform used by thousands of users - Built a unified authentication module integrating VK ID with VK Mail - Stabilized CI pipelines by recovering 1000+ automated tests and reducing deployment noise - Participated in on-call rotation for critical features, reducing downtime and incident impact

- Built a custom CMS for marketing and content teams using React, Redux and TypeScript - Implemented email template system, reducing campaign launch time by ~50% - Contributed to frontend infrastructure, feature planning, and internal tooling

-Integrated Dynatrace monitoring into FE workflows, reducing bug resolution time by ~20% and support load by ~40% - Increased test coverage to near 100% in critical modules using Jest and RTL - Improved table navigation accessibility and complex payment validation logic

-Integrated Dynatrace monitoring into FE workflows, reducing bug resolution time by ~20% and support load by ~40% - Increased test coverage to near 100% in critical modules using Jest and RTL - Improved table navigation accessibility and complex payment validation logic