Contributed to inventory and sales system, implemented business features like barcode/SKU handling, PDF receipt generation, data import/export, and operational reporting.

Fullstack development with Next.js and NestJS, integrating frontend and backend workflows, implementing 62 REST endpoints, JWT authentication, role-based access, rate limiting, and auditing.

Implemented integration components, collaborated on web interface updates, maintained technical consistency. Stack: Java, SOAP, Docker, JavaScript, HTML/CSS.

Web-to-PDF converter using Java and SOAP services, integration between web layer and backend, usability and technical consistency.

Contributed to service integrations, improved reliability of commerce-flow. Stack: Flutter, Dart, Docker, Firebase, MariaDB, REST APIs.

Connected frontend and backend workflows for create, update, and delete operations, improved commerce-flow reliability in mobile app.