Andrei Dysin

Built and maintained microservice-based APIs and implemented real-time data exchange via MQTT to improve responsiveness. Delivered client-facing portals using Next.js with server-side rendering for better initial load times and SEO. Designed adaptive, accessible UI components across devices, improved unit test coverage from 50% to 80%, and reduced production hotfixes for critical healthcare features. Adopted Claude Code (agentic AI) into daily workflows to scaffold components, generate tests, and refactor legacy modules, cutting routine implementation time by about a third. Defined team AI development practices (prompt patterns, review guardrails, validation steps), collaborated on technical feasibility with product, monitored performance and health with DataDog, and ensured stable CI/CD releases using CircleCI and GitHub Actions. Acted as deputy Tech Lead and supported release management and deployments.

Migrated a legacy frontend to a modern React SPA, improving runtime performance and standardizing the codebase. Built reusable component-driven UI using React and Ant Design, managed state with Redux, and integrated REST APIs to improve maintainability and testability. Delivered responsive layouts and new design elements, participated in Agile (Scrum) development with backend and QA, and contributed unit tests with Jest and React Testing Library alongside regular code reviews.

Restructured and modernized legacy CRM across seven client projects, improving performance and long-term maintainability. Developed new features with Vue.js and REST integrations, and contributed to Angular projects including cross-platform mobile apps built with Ionic. Maintained a shared Storybook-based UI component library to standardize the interface and speed delivery. Supported an internal portal redesign, participated in code reviews, and mentored junior developers on frontend best practices and component structure.