Designed and developed RESTful APIs for a Learning Management System, covering voucher management, course operations, and core admin/student workflows.

Built and maintained CMS and POS APIs for an aesthetic clinic, focusing on sales flows, voucher systems, booking, appointments, and stock history management.

Maintained and improved backend systems for a Wedding POS platform, resolving bugs and enhancing system stability.

Played a key role as Assistant Team Lead, mentoring junior developers, reviewing code, and coordinating task assignments to ensure efficient delivery.

Implemented transaction handling and logging mechanisms to improve system reliability and traceability.

Designed and managed CI/CD pipelines using Jenkins, Docker, and GitHub Actions, ensuring smooth and automated deployments (including Suzuki project).

Deployed and maintained servers across multiple projects, with hands-on experience in environment setup, monitoring, and troubleshooting.

Managed GitHub repositories, including branch strategies, version control, and collaboration workflows.

Designed and developed a Hotel Booking Management System with interconnected customer, admin, and client interfaces.

Implemented features including secure OAuth2 authentication, geo-based hotel discovery, and multi-language support.

Built scalable backend architecture and RESTful APIs to support real-time interactions and data synchronization.

Deployed the entire system on a secure DigitalOcean Linux droplet using Nginx.

Contributed to an SMS service platform by integrating Telco services using NestJS.

Collaborated on delivering SMS services integrated with Viber to enhance communication capabilities for clients.

Worked on ATOM's VAS project, delivering gold exchange rates, healthcare info, and more, based on user subscriptions.

Maintained and supported live production systems on AWS EC2 and managed applications on MCloud servers.

Designed and implemented scalable APIs for an agent-driven product distribution platform.

Handled complex backend sales logic involving transactions, discounts, bonuses and FOCs.

Designed relational databases and implemented a probability-based lucky draw system.

Created APIs to generate detailed reports for tracking agent activities, product movement, and transaction trends.

Created dynamic image generation features on the frontend utilizing API data.