1. Used 10 more tools, include Kubernetes, Helm chart, FastAPI, cProfile, etc. 2. Enhancement project to design a new architecture based on asynchronous services to reduce resource usage and improve performance (IO/CPU bound issues). 2. Increases QPS by a factor of two and reduces memory usage by a factor of seven. 3. Designed a solution to capture and reproduce the traffic of the production environment with GoReplay. 4. Profiling of services using cProfile, Grafana, DB monitor, etc. to find bottlenecks.

1. Built IT infrastructure on GCP to support company’s service 2. Maintained service on k8s cluster with GKE

1. Designed CI/CD pipelines on Docker Compose and Github Action that shorten development life cycle 2. Reduced 40% time by using Ansible to automate deployment process for Azure 3. Developed blockchain certificate issuer using Python, FastAPI, Celery and Docker with IOTA 4. Decoupled the data model and reduced the redundant code by 30%

1. Developed submission system using Laravel for comic competition 2. Responsible for penetration test include OWASP top 10 and other to keep production project safe 3. Built pressure test using Jemeter for payment flow, content website, database and other