Ivan Gavrilin

• Developed and refactored a large-scale marketplace using FSD architecture and TypeScript. • Migrated legacy OOP to modular structure, built 100+ reusable components and key modules (registration, analytics, product & order management). • Simplified APIs with Next.js Server Actions, improving scalability, maintainability, and debugging time (−2×). • Delivered new features end-to-end in close collaboration with Backend, QA, and Design in Agile (Kanban), ensuring high performance and clean code.

Key Projects & Achievements: • GraphQL Query Editor: A sophisticated online editor with user auth, dynamic API selection, and real-time visualization. • E-Commerce Application: Developed a scalable storefront integrated with a cloud-based commercetools backend. • Interactive Billiard Game: Implemented real-time physics and dynamic rendering using HTML Canvas API and TypeScript. • Global Architecture: Modern patterns such as Custom Hooks, Render Props, and Compound Components across various SPA projects.

- Full-stack Ownership: Built and scaled a niche E-commerce business from scratch, leading a full platform migration from Joomla to OpenCart to improve SEO and performance. - Integrations: Implemented external APIs for payments, logistics, and marketplaces. - Impact: Managed a catalog of 2,000+ items, aligning technical UI/UX improvements with business KPIs and customer conversion rates.

• Represented German brands such as OASE, Grundfos, and Buderus, providing B2B sales, client relations, and interpreting for German partners. Organized business trips and trade fair visits to Germany, building 12+ years of collaboration with German companies.