Ri Le Tan

The MUST Company is a South Korean fintech and Web3-focused firm known for its innovative approach to remote work, hiring practices, and product development

🌟 Responsibilities

• Led a devops engineering team of 4, supporting 80+ developers across the organization with scalable infrastructure and tools
• Designed and built AWS Cloud foundation from the ground up, enabling secure, cost-effective, and high-performance environments
• Successfully migrated legacy on-premise applications to AWS, improving reliability, scalability, and deployment speed
• Established and optimized engineering workflows using Agile methodologies (Kanban/Scrum), enhancing team productivity and delivery cadence
• Developed reusable Infrastructure-as-Code (IaC) modules using AWS CDK and automated deployments via GitHub Actions
• Implemented robust APM and alerting systems using New Relic and Amazon CloudWatch, ensuring high system observability and rapid incident response
• Designed a CI/CD pipeline integrating security and compliance checks, dependency scanning, and end-to-end testing using Zebrunner and SonarQube, ensuring high code quality and regulatory alignment throughout the development lifecycle.
• Designed and optimized CI/CD pipelines to support diverse application types, including backend, frontend, mobile, and desktop apps using Github Actions.

The TymeX is the technology and product development engine of Tyme Group — a fast-growing digital banking organization focused on emerging markets.

🚀 DevOps and Platform Engineering Achievements

🔧 Platform and Pipeline Development

• Engineered a reusable and extensible pipeline platform for feature teams, enabling seamless deployment of microservices across multiple AWS accounts and regions.
• Designed and optimized CI/CD pipelines to support diverse application types, including backend, frontend, mobile, and desktop apps using Code Pipeline.
• Built a zero-downtime deployment pipeline with one-click rollback capability, ensuring smooth production releases without service interruption or performance degradation.
• Created a DevSecOps pipeline integrating Compliance checks, Code quality analysis and dependency vulnerability scanning for secure, low-risk deployments

📊 Metrics and Monitoring

• Developed a custom DORA Metrics dashboard for internal pipelines, providing real-time insights into deployment frequency, lead time for changes, change failure rate, mkean time to restore that empowered feature teams to make data-driven decisions and improve DevOps performance.
• Implemented comprehensive monitoring and APM tools to ensure system reliability, performance visibility, and proactive issue resolution.

☁️ Cloud Infrastructure and Operations

• Managed end-to-end cloud operations, including monthly patching, database provisioning, secrets rotation, upgrades for services like Kafka and Amazon RDS, etc...
• Automated disaster recovery (DR) drills every 6 months to validate system resilience and recovery readiness.
• Designed reusable and overridable infrastructure modules for easy maintenance and customization by development teams.
• Maintained high-availability and fault-tolerant systems, ensuring continuous service uptime and reliability.

💰 Cost Optimization

• Analyzed cloud cost reports and identified unused or underutilized resources, implementing cleanup strategies that resulted in monthly savings exceeding $10,000.
• Developed automated jobs to archive application logs to Amazon S3, ensuring efficient storage and long-term retention.
• Implemented daily automation to stop and start AWS resources in non-production environments, achieving cost savings of up to 30% through optimized resource utilization.

Viettel High Tech Corporation is the advanced technology and industrial arm of Viettel Group, one of Vietnam’s largest telecommunications and defense companies.

Responsibilities

• Developed scalable telecom applications using Erlang, optimized for high concurrency and fault tolerance.
• Automated service operations using Bash and Python scripts to streamline deployment and maintenance tasks.
• Built robust backend systems supporting millions of mobile (cellular) subscriptions, ensuring high availability and performance.
• Created custom monitoring and alerting services for real-time system health tracking and proactive incident response.
• Designed and maintained CI/CD pipelines using Jenkins and GitLab CI, enabling continuous integration and rapid delivery.
• Maintained and enhanced the IMS (IP Multimedia Subsystem) Application Server, ensuring stability and feature evolution.

Key Project

• IP Multimedia Subsystem (IMS)
  • Enabled VoLTE (Voice over LTE) features for Viettel mobile users, improving call quality and network efficiency.
  • Supported over 10 million active VoLTE subscriptions, ensuring scalability and reliability.
  • Developed multi-SIM functionality on the IMS Application Server, enhancing user experience and device compatibility.

VNG Corporation is a leading Vietnamese technology company founded in 2004, originally known as VinaGame. It specializes in digital content, online entertainment, social networking, e-commerce, and cloud service.

Experienced in Linux servers, virtualization, HA architecture, CI/CD, monitoring, and Python scripting.
Key Projects:
VNG Webpayment, MTO Passport, iRead.vn, and GT Framework. Supports dev teams and system operations.

Ho Chi Minh City University of Technology (Bách Khoa University) typically refers to one of Vietnam’s top engineering and technology institutions.

The AWS Certified DevOps Engineer – Professional certification is a highly respected credential that validates your advanced technical expertise in deploying, operating, and managing distributed applications on the AWS platform.

The AWS Certified Solution Architect – Professional is one of the most advanced and prestigious certifications offered by Amazon Web Services. It validates your expertise in designing complex, scalable, and secure cloud architectures using AWS services.

AWS Certified Developer – Associate