Hossein Hajizadeh

- Cloud-Based ECM: Collaborated with the team to design and development a scalable and efficient cloud-based ECM. The project employed microservices, leveraging DDD, Event Sourcing, Event-Driven, and CQRS to ensure scalability, reliability, and maintainability. - Custom Frontend Framework & Backend API Development: Enhanced an Angular-based custom frontend framework for easy document management. Optimized backend APIs, cutting memory usage by 75% and boosting performance up to 4x for seamless integration.

- Social Media Platform: Designed and developed a scalable international social media platform using ASP.NET Core Web API and AWS, with an optimized fan-out system for high-demand post timelines. - NopCommerce Customization: Expanded NopCommerce by creating 30+ plugins, integrating 100+ RESTful APIs, and developing an automated e-commerce site builder for dynamic website creation.

- Architecture & DevOps Enhancement: Established a formal architecture for projects, significantly improving development efficiency and maintenance. Implemented Docker and DevOps practices to streamline deployments. - Insurance Solutions: Developed and deployed three insurance services, car insurance, fire insurance, and third-party insurance working collaboratively within an Agile team to ensure seamless integration and functionality.

- Extended Nopcommerce open source with event-driven, AOP, clean architecture approaches, and CQRS pattern (Elastic Search, SQL Server) and developed it on a large scale - Developed a microservice for notification and synchronization, integrating Elasticsearch with Kafka - Addressed concurrency timeout problems and significantly increased concurrency from 200 to 2000 - Implemented unit tests using xUnit and performed performance tests.

• MES Implementation: Analyzed requirements and developed a Manufacturing Execution System (MES) solution for Samsung’s factory in Iran, optimizing production processes and ensuring operational continuity. • Cost Savings: Successfully launched the MES system, preventing a potential six-month factory shutdown and saving the company over $20 million.

• Core System & API Development: Designed and implemented a comprehensive food and meal analysis system, with RESTful APIs using a Service-Oriented Architecture (SOA) for modularity and scalability. • Application Development: Developed three web applications and an Android app based on the core system.

Custom Software Solutions: Delivered over 50 tailored software solutions for clients, spanning web, Android, and Windows Forms platforms, addressing diverse business needs and enhancing client operations.