## Project Maintenance and Refactoring - Backend CMS Development: Implemented a CMS system similar to WordPress to enhance overall operational efficiency. - Enhanced Member Flexibility: Added customizable features in the backend, enabling users to configure and arrange content as desired. - Template Refactoring and Optimization: Refactored popular template styles and variables, effectively reducing template development time by 50%.

## Project Maintenance and Refactoring - Independently took over and refactored an outdated live streaming backend project, significantly improving user experience and performance. ex. added new features such as real-time preview and aspect ratio settings for broadcaster photos based on on-site requirements, facilitating ease of use for operational staff. - Refactored the voice integration method for the game frontend, reducing development costs for adding new voiceovers. Changed from static imports to dynamic fetching of filenames, reducing the time required to add new voiceovers by 90%, from 1-2 days to 1 hour per language. - Assisted in the refactoring of a new game backend, establishing various components and documentation through Storybook, thereby reducing future maintenance and development costs. ## Project Development - Assisted in the development of a card game and its animations.

## Functional Development - Introduced PWA to all brand websites, eliminating the need for traditional Cordova apps and significantly reducing the cost of purchasing super signatures for company stakeholders. - Implemented Webauthn, enabling FaceID/TouchID authentication on web pages to ensure the Mobile website closely mimics the app user experience, resulting in positive customer feedback and a 20% increase in user retention rate. - Utilized WebSocket and heartbeat mechanism hooks to ensure stable connections and proper message notifications within internal backend systems. ## Project Maintenance (Information Security) - Collaborated with Backend and MIS colleagues to address account hijacking issues on legacy brand websites by introducing a fingerprint plugin, monitoring traffic, and geolocation of account logins to block malicious access and reduce operational costs. - Optimized the OTP verification process, combining visitID and email verification to enhance customer account protection while reducing SMS verification service costs. ## Project Optimization (Multi-theme & Data Tracking) - Implemented Google Tag Manager (GTM) tracking codes across projects to provide data tracking capabilities for the operations team. - Introduced CSS variables (cssVars) for multi-theme support across all brand websites, collaborating with UI/UX designers to enhance user experience by offering multiple color schemes for user selection. - Integrated Google Sheets API to automate maintenance page functionality, enabling PMs to easily adjust maintenance schedules and reduce version update costs.

## Project Inheritance and Maintenance - Assisted senior management in taking over various projects from the previous team, dedicating significant effort to diligently analyze and understand project functionality and current status in the absence of proper handover documentation. - Successfully migrated projects from SVN to Git version control, enhancing collaboration, streamlining development workflows, and improving overall project management efficiency. - Meticulously upgraded the outdated Quasar framework to ensure project stability and compatibility post-upgrade, mitigating potential risks and ensuring uninterrupted operations. - Documented project setup, deployment, and operational procedures, introducing coding style guidelines and integrating tools such as ESLint, Prettier, Stylelint, and Husky to maintain code quality and reduce maintenance costs for new team members. ## Functional Development - Developed a customized game tailored for the Vietnamese market, adapting game rules and mechanics based on specific client requirements to cater to local preferences and enhance user engagement. - Took ownership of a troubled project, refactoring and fixing issues while maintaining existing styles, ensuring cross-browser compatibility to prevent functionality loss and deliver a seamless user experience.

## Innovative Technology Adoption - Proactively researched and implemented cutting-edge technologies such as Vue3 and TypeScript into new projects under the leadership of the Frontend Lead, enhancing development efficiency and maintainability. - Conducted in-depth analysis of competitor websites focusing on sports news and events, identifying key features, design elements, and user experience best practices to inform project strategy and development.

## SEO and Brand Promotion - Developed the company's official corporate website based on stakeholder and PM requirements, faithfully translating design mockups into fully functional web pages to enhance brand visibility and corporate image. - Implemented SEO best practices to improve website ranking and organic traffic, boosting online presence and attracting potential customers. ## Functional Development - Collaborated with a team to develop a robust backend system compliant with European regulations, ensuring data privacy and security. - Introduced data visualization techniques to transform raw backend data into intuitive and engaging visual representations, enabling better insights and decision-making. - Implemented essential features such as membership management and financial transaction processing, enhancing platform functionality and user experience. ## Website Maintenance - Cooperated in developing customizable templates (PC and Mobile) for third-party platform websites, providing flexibility and tailored user experiences. - Developed reusable components following modular design principles, improving development efficiency and maintainability across multiple projects.

## Functional Development - Developed multilingual static websites focused on ease of maintenance, ensuring efficient updates and reducing technical debt. - Researched and implemented engaging Sprite animations to enhance user experience and visual appeal. - Created dynamic event pages, optimizing styles and fixing cross-browser compatibility issues for seamless functionality. - Collaborated in building a robust multilingual membership web application, integrating membership features for third-party platforms to expand user base and functionality. - Established reusable team components following best practices, reducing development time and ensuring consistency across projects. - Integrated third-party game APIs to enhance user engagement and provide immersive gaming experiences. ## SEO and Brand Promotion - Optimized and refactored legacy exhibition projects, improving performance and ensuring compatibility for the company's overseas presentations, thereby strengthening brand presence in international markets. - Worked closely with the QA department head to identify and resolve potential environment deployment issues, ensuring flawless demonstrations during high-stakes exhibitions and enhancing brand reputation. ## Project Optimization and Operations - Participated in on-call rotation with team leaders, troubleshooting critical online issues and implementing effective solutions to minimize downtime and ensure uninterrupted service operations. - Actively contributed to optimizing and maintaining the backend CMS system, implementing performance enhancements and resolving bottlenecks to improve overall system efficiency and reliability.