As CTO at LTV, I am leading efforts to drive company-wide transformation, focusing on both internal culture and external brand development. This position presents a unique and exciting challenge, and I am fully committed to delivering impactful results.- Corporate Culture Development: Spearheading initiatives to foster a collaborative, growth-oriented environment within the organization. These programs are designed to promote the personal and professional development of the entire workforce, enhancing team cohesion and engagement.- Brand Revitalization: Leading efforts to refresh and modernize the company's image, positioning LTV as an innovative and forward-thinking player in the market. This includes aligning the company’s public perception with its long-term vision for growth and success.I am dedicated to overcoming these challenges by fostering a culture of continuous improvement and innovation.

Scalable System Design: - Spearheaded the design and development of a highly scalable system from the ground up using microservices architecture and GraphQL federation, ensuring the system's ability to efficiently handle increased loads and scale effortlessly as the user base grows.- Core Integration Platform: Architected and built a core integration platform with a flexible plug-and-play architecture, enabling smooth collaboration with external teams, including Hilios AI. This platform allowed multiple development teams to contribute while maintaining system stability, efficiency, and scalability for future enhancements.- Hilios AI Core Development: Led the development of the Hilios AI core, harnessing the power of Large Language Models (LLMs) to deliver advanced AI-driven solutions tailored for enterprise customer service needs. Successfully integrated AI functionalities to enhance automation, improve response accuracy, and streamline service processes.- Collaborative Development: Partnered closely with cross-functional teams and external stakeholders to ensure seamless integration of AI capabilities and system functionalities, contributing to a robust and adaptable tech ecosystem.- Performance Optimization: Continuously optimized system performance, ensuring low latency and high availability, while maintaining scalability as the system evolved to meet new business requirements.Key Technologies & Tools:Languages & - Frameworks: Node.js, Typescript, GraphQL, - Architecture: Microservices, GraphQL FederationAI - Integration: LLMs (Large Language Models)- Infrastructure: AWS, Docker, Kubernetes

As CTO of VSK Group, I oversee the technological direction and strategy of the company, ensuring innovation and efficiency in all operational and technical aspects. My core responsibilities include:- Factory Operations and Automation: Managed the bird’s nest production factory in Da Nang, implementing advanced automation systems to optimize production processes and improve overall efficiency.- Technical Issue Resolution: Led technical analysis and problem-solving initiatives, collaborating closely with software vendors to troubleshoot and resolve issues, ensuring minimal downtime and uninterrupted operations.- In-House Fintech Mobile Development: Built and managed a highly skilled in-house development team, driving the creation and growth of a fintech mobile application to meet the evolving needs of the business.- Loyalty Points System Management: Spearheaded the development and operation of a comprehensive loyalty points system that serves consumers, shop owners, and distributors, enhancing engagement and customer retention.- Leadership and Strategic Management: Worked closely with the CEO to manage and implement new development requirements, ensuring that technological solutions align with the company’s broader business objectives and growth strategy.Key Skills & Accomplishments:1. Extensive experience in automation, fintech, and mobile application development.Proven ability to lead cross-functional teams and collaborate with stakeholders at all levels.2. Strong background in analyzing and solving complex technical issues, driving operational efficiency.3. Expertise in managing large-scale technical projects from concept to completion, with a focus on delivering high-quality solutions.

QShop - Fintech App---Technical Skills and Expertise:- Integrated Application Design: Led the design and development of a fintech application, seamlessly integrating with core system databases to ensure efficient data flow, high performance, and reliable data retrieval.- Client-Centric Development: Worked closely with partners to gather business requirements, translating them into robust, user-friendly solutions built with modern technologies like Node.js, React, and React Native.- API Development & Integration: Developed efficient REST/RESTful APIs using Express.js, enabling smooth data exchange between the application and external systems.- Performance Optimization: Implemented a multi-layer caching strategy (including full-page and query object caching with Redis), significantly improving response times and enhancing overall user experience.- Key Responsibilities and Achievements:1. Designed and implemented complex software solutions tailored to fintech needs.2. Integrated disparate systems to maintain data consistency and streamline workflows.3. Developed user-centric mobile applications using React Native, offering a seamless cross-platform experience.4. Optimized application performance, focusing on user experience and minimizing latency.5. Managed large-scale projects from initiation to successful deployment.Essential Modules Developed:1. Internal Transfers: Developed a secure, fast system for handling internal fund transfers between system accounts with high accuracy and minimal delay.2. External Transfers: Created a seamless outbound fund transfer system to accommodate diverse customer needs, ensuring secure transactions outside the system.3. QRCode Point Redemption: Designed and implemented a QRCode point redemption system to engage customers and drive retention.4. Gold Exchange: Enabled a streamlined gold exchange process, addressing customer investment and gold trading requirements.

Full Stack Development & System Integration:- Led the development of a HRM & Budget Management System, integrating with the main system’s pre-designed database to provide seamless user experience and data flow.- Collaborated with partners to understand business and technical requirements, translating them into a robust solution using Node.js and JavaScript.- Built key features, including attendance management, work scheduling, and leave tracking for employees, improving HR management efficiency.Technical Stack & System Optimization:- Utilized a modern tech stack including Docker, Redis, Firebase (Cloud Messaging), Express.js, JavaScript, Firebase, and React Native to deliver a highly responsive and scalable system.- Designed and implemented RESTful APIs, ensuring smooth communication between the front-end and back-end systems, enhancing system interactivity.Corporate Governance & Payroll Management:- Developed comprehensive modules for employee payroll management, allowing real-time synchronization of employee data, work schedules, and salary information across departments.- Integrated chat functionality for real-time communication between employees, accountants, and administrators, enabling faster resolution of HR queries and improving internal communication.Reporting & Data Synchronization:- Enabled automated report generation for administrators, allowing HKFILM leadership to access accurate and up-to-date HR metrics, payroll data, and employee attendance statistics at any time.- Designed a feedback and suggestion system, allowing administrators to collect and act on input from employees efficiently.

System Architecture & Solution Design:- Analyzed client requirements and provided comprehensive architectural solutions covering Infrastructure, Network, Application, Database, and Caching layers.- Designed scalable RESTful APIs using ExpressJS to ensure seamless communication across systems.Performance Optimization & Monitoring:- Enhanced performance by implementing Node.js cluster-mode and worker threads for handling high-load tasks such as sending emails and exporting large reports.- Improved system scalability and responsiveness by implementing off-loading mechanisms using queues, and optimized MongoDB through schema analysis and the strategic use of single and compound indexes.- Set up Prometheus for monitoring, Grafana for visualization, and Loki for efficient log management, providing a holistic observability solution.- Optimized MongoDB performance by leveraging advanced techniques such as partitioning for large array logic and pagination using CursorBase.- Implemented Redis caching for critical data like recent tasks and top keyword searches, and integrated Redis Pub-Sub in a cluster-mode environment for enhanced system communication.Advanced Scalability & Containerization:- Researched and deployed MongoDB sharding to support horizontal scaling, ensuring the system can handle increasing data loads.- Containerized applications using Docker and orchestrated them using Kubernetes, improving deployment flexibility and scalability.- Integrated Jaeger for distributed tracing, improving the team’s ability to pinpoint and resolve performance bottlenecks quickly.

Senior Full Stack Developer & DevOps Engineer- Managed task allocation and resolution for broken tasks, ensuring smooth project workflows.- Addressed performance bottlenecks by optimizing slow and complex queries, enhancing system scalability for nationwide deployment in Vietnam.- Spearheaded improvements in system performance through Node.js core optimization, implementing function partitioning, off-loading via Worker Threads, Child Processes, and Cluster Mode.Developed RESTful APIs using ExpressJS to support seamless communication between services.- Applied MongoDB Sharding architecture to enable horizontal scaling, ensuring high availability through clustering, and optimized query performance for heavy workloads.- Integrated Redis for caching, session management, and real-time features like leaderboards and session counting (HyperLogLog).Utilized AWS services (S3, EC2, CDN, Load Balancer) to build a scalable and resilient cloud infrastructure.- Leveraged Docker and Kubernetes (K8s) for containerization and orchestration in testing and staging environments.- Contributed to mobile development using React Native for cross-platform support on Android and iOS.Led the development and deployment of Waodate, a social networking platform with over 200,000 users in Vietnam. - Key features included: 1. Comprehensive CRM and User Behavior Analysis System. 2. Location-based user scanning and matching. 3. Payment integration with multiple service packages. 4. SEO optimization for better platform visibility.- Links:Web: https://waodate.comApple Store: https://bit.ly/3M3bVK8Google Play: https://bit.ly/3CtcABj