Yevhenii Stavystkyi

Built and run a live marketplace as the sole developer, owning architecture, front end, back end, database, and deployment. Implemented catalog with filters and ratings, collections, cart, Stripe checkout, and instant download. Set up authentication and database-level access control with Supabase using row-level security. Achieved strong performance targets (Google PageSpeed 100 desktop / 90 mobile) for the production system.

Founded and independently built a full-stack marketplace for premium Minecraft builds. Designed and developed the platform end-to-end as a sole developer, including a modern e-commerce experience for buying and selling Minecraft maps/builds. Implemented core market flows such as listings, checkout, and user accounts, integrating secure payments (Stripe), authentication, PostgreSQL/Supabase data management, and scalable backend services via REST APIs. Achieved strong production performance by optimizing the architecture and reducing page weight, including Google PageSpeed scores of 100 (desktop) / 88 (mobile).

Led the CMI app from scratch to App Store and Google Play in 6 months (around 200 users), owning the front end in Flutter/FlutterFlow and integrating REST and GraphQL APIs. Contributed to application architecture and database decisions. Co-developed the Shopify company website by refactoring legacy HTML/CSS/JS and restructuring content, improving desktop PageSpeed and reducing page weight. Managed a team of 10 developers and coordinated cross-functional stakeholders; built n8n automations for internal workflows.