Ivan Chyzh

Front-End Developer with 5+ years of experience specializing in the React and Next.js ecosystems. Contributed to high-impact projects in FinTech, GovTech, SaaS, E-commerce, Web3, Enterprise Software, and Tech Startups, working in cross-functional teams of 4 to 10+ members. Proficient in full-cycle development—from gathering requirements to deploying scalable architectures with CI/CD, automated testing, and performance optimization.

I thrive in environments where code quality and user value go hand in hand. I take features from idea to production, optimize legacy systems, and bridge the gap between design and DevOps. Always staying ahead of trends—currently focused on AI-generated UI and React Server Components.

Front-end Developer at Mascode (2025-03 – Present)

Built a set of reusable graph-based components, reduced duplicated logic and accelerated feature development. Developed complex forms with advanced validation and dynamic behavior. Achieved 100% unit coverage with Vitest and implemented extensive mutation tests using Stryker. Maintained and extended Storybook with structured component documentation. Implemented WebSocket integrations for real-time updates. Leveraged TanStack Query for efficient caching and API performance optimization.

• Built a set of reusable graph-based components, reducing duplicated logic and accelerating feature development.
• Developed complex forms with advanced validation and dynamic behavior, unifying form-state patterns across the project.
• Achieved 100% unit coverage with Vitest and implemented extensive mutation tests using Stryker.
• Maintained and extended Storybook, adding structured component documentation and usage examples.
• Implemented WebSocket integrations for real-time updates, minimizing redundant API requests.
• Leveraged TanStack Query for efficient caching, request deduplication, and overall API performance optimization.

Front-end Developer at Minimal Studio (2023-05 – 2025-03)

Integrated internationalization through i18next improving multilingual support and user retention. Optimized existing GraphQL operations reducing API response time by 31.7%. Implemented and configured SSO resulting in a 14% increase in users through wallet authentication.

Integrated and customized Stream Chat for real-time messaging increasing user engagement by 18.2%. Initiated projects, handled deployments, and configured CI/CD pipelines reducing deployment time from 7.9 minutes to 5.1 minutes.

• Integrated internalization through i18next, improving multilingual support and increasing user retention by 9.3%
• Optimized existing GraphQL operations, reducing API response time by 31.7% and improving query execution time from 450ms to 310ms
• Implemented and configured SSO, resulting in a 14% increase in users through wallet authentication.
• Integrated and customized Stream Chat for real-time messaging, increasing user engagement by 18.2%
• Initiated projects, handled deployments, and configured CI/CD pipelines, reducing deployment time from 7.9 minutes to 5.1 minutes

Front-end Developer at LunaEdge (2021-10 – 2023-04)

Engineered a scalable architecture enabling the management of 8 distinct websites from a single repository reducing maintenance overhead by 39.5%. Optimized website performance achieving a perfect 100-point accessibility, performance, and SEO score. Developed automated tests using Cypress reducing production bugs by 11.8%. Collaborated on cryptocurrency integration using Privy and Metamask streamlining Web3 onboarding and decreasing user drop-off rate by 27.4%.

• Engineered a scalable architecture enabling the management of 8 distinct websites from a single repository, reducing maintenance overhead by 39.5%
• Optimized website performance, achieving a perfect 100-point accessibility, performance, and SEO score
• Developed automated tests using Cypress, reducing production bugs by 11.8% and cutting testing time per release from 2 hours to 45 minutes
• Collaborated on cryptocurrency integration using Privy and Metamask, streamlining Web3 onboarding and decreasing user drop-off rate during wallet connection by 27.4%

Front-end Developer at Epam (2020-08 – 2021-10)

Implemented A/B testing using GrowthBook optimizing user experience and increasing customer base by 10.2%. Developed a highly detailed Storybook reducing UI review time and accelerating the development cycle. Utilized Next.js for server-side rendering decreasing load times by 22.7%. Maintained CI/CD pipelines for automated testing and deployment reducing manual testing efforts by 34.8%. Streamlined the login process with Auth0 leading to a 17.6% decrease in user authentication errors.

• Implemented A/B testing using GrowthBook, optimizing user experience and increasing customer base by 10.2%
• Developed a highly detailed Storybook, reducing UI review time, enabling quicker feedback and accelerating the development cycle.
• Utilized Next.js for server-side rendering, decreasing load times by 22.7% and reducing page load speed from 1.8s to 1.1s
• Maintained CI/CD pipelines for automated testing and deployment, reducing manual testing efforts by 34.8% and deployment rollback time from 11 minutes to under 6 minute
• Streamlined the login process with Auth0, leading to a 17.6% decrease in user authentication errors.

Bachelor's degree in Computer Science – Odesa Polytechnic National University