Mohamed Naga

- Led end-to-end development of a hybrid mobile application used daily by 1,000+ tram drivers in Warsaw, supporting mission-critical transport operations. - Designed offline-first functionality to ensure uninterrupted workflows in low-connectivity environments. - Implemented OAuth2 / OpenID Connect with Keycloak for secure SSO and role-based access control. - Designed REST APIs, background jobs, and synchronization logic; modeled relational schemas in SQL Server.

- Delivered a modular HRM employee scheduling system supporting complex shift-planningand replacement workflows. - Implemented scheduling algorithms and background jobs for SMS/email notifications andshift replacement processes. - Applied SOLID principles to improve maintainability and testing.

- Designed and built a microservices-based insurance platform for quote aggregation and purchasing flows. - Implemented centralized logging and metrics to improve production debugging and observability (logging pipeline, error tracking). - Security-by-design and data handling in line with compliance requirements.

- Core contributor to national Patient Waiting List Management system (Ministry of Health, 6-person team); end-to-end auth, ICD medical coding, OracleDB. - Implemented end-to-end authentication/authorization and integrated ICD medical coding with Oracle DB-based government systems. - Delivered reporting modules and analytics dashboards.

- Led development of an enterprise form-builder and survey platform (Typeform-like) with publishing and analytics capabilities. - Implemented complex reporting, pivot queries, and data analysis features.

Contributed to e-government portal modules for Government of Kuwait (Java/Java EE, OracleDB).