Haris IJaz
I’m a Java back-end developer with 4+ years of hands-on experience building production-ready, secure microservices and distributed systems.
About
I’m a Java back-end developer with 4+ years of hands-on experience building production-ready, secure microservices and distributed systems. I specialize in Spring Boot and Spring Security, and I’ve worked on end-to-end API development, authentication/authorization with JWT and OAuth2, fine-grained role-based access control, caching strategies, and containerized deployments for cloud-ready environments.
I enjoy designing solutions that scale and remain reliable in real production settings—using Spring Cloud for service discovery and routing, integrating messaging/event streaming with Kafka and RabbitMQ, and working across domains like enterprise healthcare, HRM, and ERP platforms. Alongside strong back-end fundamentals, I’ve contributed to systems involving AWS architecture, payment/subscription integrations, and real-time communication features (e.g., secure video calling), while partnering effectively with teams to deliver maintainable software.
- 3 years' experience
- Joined October 2026
Industry experience
- Healthcare
- Software & Internet
- Education
- Financial Services
Work experience· 7 roles
Architected and contributed to a multi-tenant, enterprise-grade healthcare platform using secure microservices, ensuring tenant isolation across distributed services. Implemented end-to-end authentication and authorization with Spring Security and JWT, using fine-grained RBAC across microservices. Integrated Agora SDK for real-time, secure video calling, including session token handling, channel management, and call quality features. Integrated Paddle for subscription management and transaction processing with configuration for live and sandbox environments to support end-to-end billing tests and production payments. Implemented Redis caching to reduce database load for frequently accessed data. Used Spring Cloud Eureka and API Gateway for service discovery and centralized routing, enabling dynamic registration and intelligent request routing. Containerized microservices with Docker for AWS-ready scalable deployments and set up centralized logging and monitoring to improve observabilit
Built and contributed to an enterprise multi-tenant 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 using fine-grained RBAC across microservices. Integrated Agora SDK for secure real-time video calling (session tokens, channel management, call quality). Integrated Paddle for subscription management and transaction processing, including live and sandbox configuration for end-to-end billing tests and production payments. Used Redis caching to reduce database load for high-read endpoints. Implemented service discovery and centralized routing with Spring Cloud Eureka and API Gateway. Containerized microservices with Docker and supported AWS-ready deployments, along with centralized logging and monitoring for observability.
Designed and developed RESTful microservices using Spring Boot, applying clean architecture and SOLID principles to support scalable and maintainable back-end systems. 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 ensure data consistency across services. Integrated Apache Kafka for asynchronous, event-driven communication between microservices, improving decoupling and reliability. Containerized services with Docker and collaborated with CI/CD pipelines to streamline testing and deployment workflows.
Education
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