Bogdan Chadkin

- Built core healthcare product workflows, including real-time doctor–patient messaging and online appointment scheduling. - Designed and implemented the shared design system, standardizing UI patterns and accelerating feature development.

- Built core functionality for an open-source browser-based visual website builder using React and TypeScript, shipping features across 100K+ user projects. - Designed frontend architecture for complex visual-editor interactions, drag-and-drop, and CMS integrations. - Improved accessibility, web-platform integration, and application performance.

- Architected an authentication and multi-level authorization system supporting 130+ enterprise partners, enabling expansion of the B2B platform. - Led a 3-month migration of a large frontend and GraphQL server codebase to TypeScript, reducing manual testing and shortening release cycles by 30%. - Built property-valuation tools and lead-routing workflows used by 10K+ real-estate agents. - Migrated the application's data layer to Hasura and GraphQL, reducing backend complexity and accelerating feature development. - Mentored engineers and led onboarding for new team members.

- Built frontend for ELVis (Engineering Life Visualization), a web-based platform for real-time visualization and analysis of gas-turbine test data - Developed frontend interfaces for a large-scale municipal water communications monitoring system. - Modernized frontend architecture, build tooling, and development workflows across industrial applications

- Delivered 15+ responsive web applications for startups, agencies, and product companies. - Worked directly with clients from requirements and estimation through production delivery.