Hello, I'm Alexey. Senior Frontend / Full-Stack Engineer building modern web applications with a strong focus on React.

Leading frontend modernization of a ~20-year-old VB.NET supply-chain system, migrating it to a modern React and Python platform on AWS. Own the entire frontend including architecture, UI/UX, project structure, maintenance, and long-term evolution. Translate legacy workflows into modern frontend logic while preserving business rules, define frontend behavior and required backend endpoints, and collaborate closely with backend engineers and business stakeholders. Contribute to backend development including scalable grid data modules, user management, and role-based access control.

Designed and implemented a custom CRM system for a cleaning company, covering order management, scheduling, client communication, payroll, and financial tracking. Built a custom booking flow, internal calendar, and SMS chat integration. Responsible for end-to-end system architecture and implementation, including frontend development, backend services, database design, and third-party integrations.

Delivered multiple fixed-scope contract projects focused on advanced frontend systems and complex UI tooling. Built an advanced session recording player with DOM change highlighting, HTML search, time-based navigation, and DevTools-like panels. Worked on frontend development for a content protection platform, including UI redesign, legacy code refactoring, and feature implementation. Also conducted security testing of external SaaS applications, discovering a critical vulnerability with significant revenue impact.

Built a custom internal CRM frontend for a truck and trailer service company to support warehouse operations and service scheduling. Translated business requirements into frontend architecture and application logic, including a calendar-based scheduling system and warehouse monitoring features.

Designed and built a full CRM system to digitize construction company operations, including project tracking, role-based access, employee management, and process control. Implemented the system end-to-end using React Native and TypeScript on the frontend, and Go, PostgreSQL, and Redis on the backend.

Progressed from handling minor frontend tasks to owning core components and complex application logic. Worked on refactoring legacy code, improving performance, participating in code reviews, and assisting with technical interviews on a system focused on logistics, accounting, and financial workflows.