Hanieh Ershadbakhsh

• Developed multiple microservices-based projects utilizing Java
• Implemented and optimized systems for high-traffic scenarios, ensuring minimal downtime
• Deployed all projects on Kubernetes with Docker-based containerization
• Designed robust APIs and utilized Redis for caching, enhancing performance
• Used Prometheus and Grafana for system monitoring and visualization

Key Projects:

SIM Card Sales Microservice: Developed microservices enabling Irancell SIM card sales, serving thousands of users daily

• Integrated REST APIs for third-party communication and optimized caching with Redis, reducing response times by 30%
• MongoDB was employed for storing API responses, ensuring high availability and quick data retrieval

Mobile Recharge and Data Package Sales: Designed and implemented microservices to handle mobile recharge and data package purchases

• Developed algorithms for sorting and searching unstructured data and used Redis for high-speed access
• Created a fault-tolerant system with Oracle database fallback to maintain service availability during failures

E-Wallet Auto-Recharge: Architected microservices for automatic wallet recharges using Kafka for message queuing

• Designed and implemented a multi-threaded worker-consumer model for efficient processing
• Conducted extensive load testing with Locust to ensure high performance and scalability

QR Code Payments: Built microservices to enable QR code-based payments for various merchants

• Ensured secure and efficient payment flows with robust API integration

NFC Payment Integration: Designed microservices for contactless NFC-based payments

• Ensured secure data handling and implemented Oracle for persistent storage

• Taught Java programming to aspiring developers in a structured bootcamp environment

• Developed and maintained 4 projects in the different areas of the industry: Finance, Public Transportation, and Online Charging
• Deployed all services on Kubernetes and increased test coverage up to 60% from almost 0%
• Overhauled slow queries in the system and removed extra use of criteria in code, improving performance of those web services by 60%
• Implemented an automated deployment process that reduced time-to-deployment from several days to several hours
• Added a tracing system, decreasing maintenance costs by 30%
• Improved system observability by implementing a monitoring system for all services
• Initiated a CI/CD system for all services, reducing deployment time by 50%
• Increased test coverage of all services to at least 75%
• Developed automated scripts to simplify common tasks and reduce manual effort
• Improved database performance by optimizing queries and indexing

• Migrated 3 projects written in multiple frameworks to Spring, simplifying integration
• Created monitoring dashboards for all services, making 100% of projects observable
• Optimized slow queries, improving system performance by 40%
• Automated numerous processes and tasks, reducing team workload and enhancing efficiency
• Transitioned many services from SOAP to REST, reducing maintenance costs by 50%
• Boosted system reliability by writing unit tests and raising test coverage, speeding up development by 2x

• Assisted professors in programming and discrete mathematics courses for two consecutive terms
• Helped students understand key concepts, improving overall class performance