Vladyslav Vovk

Worked on TigerWealth – SaaS platform for crypto traders. Designed and developed a real-time cryptocurrency dashboard using React, TanStack Table, and custom charting components, enabling traders to explore aggregated market and CMS data with advanced sorting and filtering. Developed secure and scalable authorization system handling thousands of daily users, implementing role-based access for pro subscriptions and admins with JWT, PostgreSQL, Prisma; added refresh token rotation via axios interceptors and API documentation with swagger. Built backend endpoints across application, including a main board endpoint that aggregates data from Contentful CMS, PostgreSQL and crypto APIs. Improved performance and scalability by adding Redis caching, custom rate limiting, and lazy loading, reducing infrastructure costs and increasing response times by >40%. Containerized the application with Docker and collaborated on AWS deployment, including CI/CD pipelines, streamlining release cycles, and

Worked on Skhole – Finnish e-learning SaaS platform for healthcare education. Implemented interactive course modules, quizzes, and progress tracking using React, Next.js, and shadcn/ui, ensuring a modern and accessible learning experience. Optimized performance and SEO with Next.js features (SSR, dynamic routing, code splitting), boosting Lighthouse scores by 15% and improving page load speed. Developed backend services and RESTful APIs for managing courses, user roles, and progress tracking, ensuring secure and scalable data flow; implemented form handling with React Hook Form and schema validation with Zod on the frontend. Assisted in CI/CD pipeline setup for automated testing and deployment using Jest, React Testing Library, and GitHub Actions, ensuring reliable delivery and reduced regression risks.