Arash Hajivaziri

• Delivered full-stack solutions for a Toronto-based SaaS platform, including Uplifter • Designed and implemented an attendance feature end-to-end, improving system functionality and user workflows • Applied Domain-Driven Design (DDD) and Hexagonal Architecture (Ports & Adapters) to build scalable, maintainable backend services (PHP) • Practiced Test-Driven Development (TDD) to ensure high reliability and strong test coverage • Worked on a 15-year-old legacy system, improving performance, stability, and code maintainability • Diagnosed and resolved complex production issues, focusing on debugging and performance optimization • Designed and optimized REST APIs, improving data flow and system efficiency • Improved database performance through query optimization and schema design • Collaborated with frontend teams using Angular to deliver integrated, scalable applications

Delivered full-stack solutions for a Toronto-based SaaS platform, designed and implemented an attendance feature to enhance functionality, and addressed production issues focusing on performance optimization.

Refactored backend codebase with design patterns and clean architecture, improving scalability and maintainability. Normalized and optimized database structure resulting in 60% better query performance. Enhanced security through customized Docker files, OS hardening, firewall and network security, increasing security by 40%. Developed secure CI/CD pipeline automating build and deployment on AWS EC2, reducing deployment errors and time by over 50%.