Haris Ijaz

Architected and contributed to a multi-tenant, enterprise-grade healthcare platform using microservices, ensuring secure data isolation per tenant across distributed services. Implemented end-to-end authentication and authorization with Spring Security and JWT, including fine-grained RBAC across microservices. Integrated Agora SDK for secure real-time video calling, handling session tokens, channel management, and call quality. Integrated Paddle for subscription management and transaction processing, configuring both live and sandbox environments for end-to-end billing testing and production payments. Added Redis caching to reduce database load for high-read endpoints, and used Spring Cloud Eureka and API Gateway for service discovery and centralized routing. Containerized services with Docker for AWS-ready, scalable deployments and set up centralized logging/monitoring for observability and reliability across the system.

Designed and developed RESTful microservices with Spring Boot using clean architecture and SOLID principles. Implemented secure authentication and authorization flows using Spring Security, JWT, and OAuth 2.0 for role-based access control across distributed services. Built and optimized PostgreSQL and MongoDB data layers to improve query performance and maintain data consistency across services. Integrated Apache Kafka for asynchronous, event-driven microservices communication to improve decoupling and reliability. Containerized services with Docker and collaborated with CI/CD pipelines to streamline testing and deployment workflows.

Designed and delivered core HRM modules including Attendance Management and Employee Card Printing with full end-to-end business workflows. Authored and maintained Flyway migration scripts for schema versioning with support for Arabic (RTL) in database schema and seed data. Implemented server-side pagination across high-volume endpoints to improve API performance and scalability. Built advanced search and filtering mechanisms for efficient, user-friendly retrieval across HRM entities. Enforced business validation rules and improved error handling across module boundaries to enhance system reliability and user experience.