Hossein Taheri

* Developed and maintained three Django-based web applications with PostgreSQL integration, achieving a remarkable 99.9% uptime while eliminating critical vulnerabilities across all platforms. * Architected complex relational database models and defined REST API endpoints using Django REST Framework, ensuring robust data integrity for three distinct web applications and promoting clean architecture principles. * Refactored over 50 slow SQL queries to enhance performance metrics significantly, resulting in a 70% boost in overall system responsiveness and improved user experience across applications. * Implemented Celery and Celery Beat for managing asynchronous tasks like image processing and report generation, which successfully reduced server response times by an impressive 60% during peak loads. * Managed application deployments on AWS (EC2, S3, RDS) while implementing strong backup strategies that ensured a staggering 99.99% uptime and zero data loss incidents throughout the deployment phases. * Created standardized REST API documentation utilizing Swagger and OpenAPI specifications that cut integration time between front-end and back-end teams by 40%, streamlining collaboration processes significantly. Skills: Django, PostgreSQL, REST APIs, Celery, AWS (EC2/S3/RDS), Swagger/OpenAPI

* Transformed a legacy codebase by migrating the application to Django, achieving a 20% reduction in infrastructure costs while enhancing maintainability for future development cycles across multiple teams. * Implemented robust unit and integration testing frameworks using Pytest that resulted in an impressive 95% test coverage across core application modules, significantly minimizing production bugs and improving software reliability. * Conducted thorough debugging and system analysis to identify performance bottlenecks; this proactive approach led to a notable decrease in production issues and improved overall application efficiency. Skills: Django, Python, PostgreSQL, RESTful APIs, Unit Testing

* Developed four customer-facing web applications using Django and PostgreSQL, achieving a remarkable 90% customer satisfaction rating through effective design and robust functionality tailored to user needs. * Implemented Docker and Docker Compose for application containerization, resulting in a significant reduction in development time by 30% and enhancing deployment efficiency across multiple projects. * Integrated Celery for asynchronous task processing within applications, reducing job execution times by up to 40%, which led to improved overall system performance and user experience. * Collaborated with cross-functional teams including designers and stakeholders to refine application features, driving a 20% increase in user satisfaction scores through targeted enhancements based on user feedback. * Designed responsive front-end components utilizing React and Next.js, which improved the user interface across multiple projects while ensuring seamless interaction for end-users. Skills: Python, Django, PostgreSQL, Docker, RESTful APIs

• Worked as part of a large team of over 100 people, orchestrated the administration of servers, networks, and related computing environments including computer hardware, systems software, and all configurations, ensuring optimal performance and uptime. • Troubleshot complex Windows Server issues, employing advanced diagnostic tools and methodologies to resolve critical issues within strict SLA guidelines, resulting in a 30% faster incident resolution time. • Configured and sustained domain and network services, including AD, Group Policy, WSUS, etc. • Conducted extensive research on new technologies and recommended their implementation, resulting in a 40% increase in productivity.

• Maintained essential IT operations including operating systems, security tools, applications, servers, email systems, laptops, desktops, software, and hardware. • Managed more than 15 requests and tickets per day, ensuring timely resolution of IT issues and providing excellent customer service.

• Maintained and administrated servers, networks, and related computing, environments including computers hardware, systems software, applications software, and all configurations. • Installed, configured, administrated and troubleshooted Windows Servers (2008 R2, 2012, 2016). • Configured, administrated and maintained domain and network Services: AD (Active Directory), Group Policy, WSUS, etc. • Researched new technologies by attending seminars, reading trade articles, or taking classes. Implemented or recommended the implementation of new technologies.