hamzaharrayhan

Developed and maintained backend systems for an online course platform, supporting 10,000+ active users with seamless course access and admin-level course management functionality. Designed and optimized PostgreSQL database schema and ERD, leading to a 30% improvement in query performance for core endpoints. Implemented caching layer (e.g., Redis) for frequently accessed API routes, reducing response times by up to 60% and decreasing database load by 40%. Built automated cron jobs for scheduled tasks (e.g., data syncs, email reminders, report generation), increasing system automation and operational efficiency by 70%.

Led a cross-functional team of 5 members (frontend, backend, QA, and design), ensuring project alignment and timely delivery as the Engineering Lead. Designed and maintained the system’s database architecture using MySQL, ensuring scalability and data integrity for up to 500+ internal users. Collaborated closely with stakeholders to propose features that increased appraisal submission rate by an estimated 40% within the first quarter of launch. Developed both frontend and backend components, enabling seamless user experience and robust backend logic for HR workflows. Introduced Agile methodologies into the team’s workflow, improving sprint velocity by 30% and delivery predictability.

Collaborated closely with a team of 3, including a QA Engineer and System Analyst, to ensure high-quality deliverables through rigorous testing and validation before production rollout. Successfully delivered the project 1 month ahead of schedule, exceeding expectations and accelerating partner onboarding. Took ownership of UI/UX slicing, responsive design, and integration with backend services to deliver a seamless user experience. Applied agile methodologies, participated in daily stand-ups, and worked cross-functionally to ensure alignment between business goals and technical implementation.

Designed and implemented end-to-end automated test scripts using Mocha & Chai for API automation testing and Cypress for Frontend automation testing. Created comprehensive manual test scenarios and test cases, aligned with user stories and acceptance criteria, ensuring 100% test coverage across critical features. Actively participated in sprint planning, daily stand-ups, and retrospectives, helping the team maintain agile velocity and continuously improve test processes.