Projects

Work Experience

• KKCompany, KKStream (BlendVision) Senior Site Reliability Engineer (SRE) | Full time

  Sep 2022 - Present

  • DevOps to strengthen service reliability
    • Revamped CI/CD flows to enable seamless deployments during large-scale migrations, minimizing downtime and disruptions.
    • Migrated legacy Chef cookbooks to Terraform, increasing team productivity by 30%.
    • Upgraded legacy PHP 5.4 and Ubuntu 14/16/18 systems, reducing P0 alarms related to outdated systems and dependencies by 50%.
    • Built and maintained Golden Images, standardizing environments and accelerating CI environment setup.
    • Migrated postfix mail server to Amazon SES, improving email reliability and scalability.
    • Transitioned from Logstash to Fluent Bit, aligning development and operations logging workflows for improved observability.
    • Developed and maintained Slack notification tools, enhancing operational visibility and incident communication.
    • Automated weekly and monthly service latency and SLA reports, reducing manual overhead.
    • Implemented Akamai CDN usage monitoring, optimizing content delivery performance.
    • Migrated legacy CloudFormation stacks to Terraform, streamlining infrastructure management.
    • Introduced a Maintenance Mode feature to prevent unexpected interruptions during deployments and upgrades.
  • Enhanced System Reliability and Migration Success
    • Transitioned from Classic Load Balancer (CLB) to Application Load Balancer (ALB), increasing service resilience and observability.
    • Collaborated with backend teams to migrate OpsWorks EC2 stacks to ECS Fargate, reducing false alarms by 20% and cutting P0 incident recovery time by 50%.
    • Refactored SLA reporting workflows with Lambda and CloudWatch, reducing manual effort and improving reporting accuracy.
  • Infrastructure Optimization
    • Upgraded production MySQL clusters from version 5.x to 8 LTS, enhancing performance and security.
    • Migrated Redis Clusters from Redis 4 to 6, doubling IOPS performance through hardware upgrades and tuning.
    • Migrated infrastructure management from CloudFormation to Terraform, accelerating infrastructure deployment cycles.
    • Built Slack pre-warm workflows for ECS Fargate services and RDS Clusters, reducing cold start times and improving availability.
  • Observability
    • Gradually rolled out OpenTelemetry (OTEL) across all services, improving system observability.
    • Deployed node-level and pod-level observability for video encoder jobs, enhancing debugging and performance monitoring.
    • Implemented S3 object tagging and alarm monitoring for better resource management and cost tracking.
    • Managed Prometheus server, exporter and AWS Managed Prometheus with Alertmanager as central alerting, metrics storage and visualization with Grafana, CloudWatch.

• CoolbitX DevOps / Site Reliability Engineer | Full time

  Dec 2019 - Sep 2022

  • Logging, Observability and Monitoring
  • Developed in-house tools, including Golden image, slack bots, changelog generator, semantic release, AWS CDK templates, linters, and custom resources, streamlining DevOps processes.
  • Managed Prometheus, Grafana, and Loki monitoring stacks with Terraform for system insights and issue detection on Google Cloud Platform (GKE)
  • Performance and Security Improvements
  • Optimized the China site's browsing experience by doubling its speed through networking enhancements.
  • Deployed CloudFlare WAF and DDoS mitigation for robust API and site security.
  • Infrastructure and Deployment Advancements
  • Designed and managed architectures using AWS CDK, Terraform, including ECS, RDS, Lambda, API Gateway, DynamoDB and CI/CD pipelines.
  • Ensured High Availability (HA) and Disaster Recovery (DR) with Multi-AZ deployments.
  • DevSecOps and Automation
  • Integrated DevSecOps practices into workflows, automating vulnerability scans and configuration checks.
  • Built a Slack bot with AWS Lambda for pre-deployment checks, improving production readiness.