Designed and supervised system architectures for frontend and backend solutions (React/Next.js, Node.js/Express, MongoDB). Developed and integrated APIs with external services (Stripe, logistics, CRM) and implemented authentication/authorization (JWT, OAuth2). Built and maintained admin dashboards for content and product management, including RBAC and CRUD features. Implemented security practices ensuring data protection, backups, and secure API endpoints.

Full Stack Developer & Co-founder at HYPER BAY Sp. z o.o.

September 1, 2025 - September 25, 2025

Designed and supervised system architectures for frontend and backend solutions (React/ Next.js, Node.js / Express, MongoDB). Developed and integrated APIs with external services (Stripe, logistics, CRM) and implemented authentication/authorization (JWT, OAuth 2). Built and maintained admin dashboards for content and product management, including role-based access control and CRUD features. Implemented security practices ensuring data protection, backups, and secure API endpoints.

Full Stack Developer (Freelance)

May 1, 2024 - September 25, 2025

Developed responsive multi-page (MPA) and single-page (SPA) applications using React/Next.js, TailwindCSS, and Vite/Webpack. Built and deployed backend APIs with Node.js (Express/NestJS), modeled data with MongoDB/PostgreSQL, and implemented robust access layers with Mongoose/TypeORM. Optimized performance with lazy loading, code-splitting, and image optimization, improving Core Web Vitals metrics. Implemented technical SEO improvements: meta-tags, indexing optimization, and multilingual support (i18n).

Full Stack Developer (Freelance)

May 1, 2024 - September 25, 2025

Developed responsive multi-page (MPA) and single-page (SPA) applications using React/Next.js, TailwindCSS, and Vite/Webpack. Built and deployed backend APIs with Node.js (Express/NestJS), modeled data with MongoDB and PostgreSQL, and implemented robust access layers with Mongoose/TypeORM. Optimized application performance with lazy loading, code-splitting, and image optimization, improving Core Web Vitals metrics. Implemented technical SEO improvements: meta-tags, indexing optimization, and multilingual support (i18n).