- Optimized SEO metrics and improved the speed and JavaScript bundles of key user-facing pages. - Developed shared components and hooks for consistent use throughout the project. - Implemented API endpoints and designed background workers for executing long-running tasks. - Upgraded a legacy codebase by migrating to Node 20 and Next 14, leveraging state-of-the-art techniques. - Integrated with various payment providers, such as ACB Bank Payment Gateway and Momo.

Given feedback on requirements to the Business Analyst. Created shared components and hooks for project-wide use. Developed a responsive, pixel-perfect user interface. Designed API endpoints. Reviewed pull requests. Guided newly recruited team members.

Collaborated with customers to gather requirements. Designed infrastructure. Created and maintained the CI/CD pipeline. Defined codebase and coding conventions. Created checklists for designing test cases. Supported other team members.