Application Infrastructure & Observability Services required to maintain exchange backend services on Google Cloud, including VPC, Cloud NAT, GKE, PubSub, GCS and LoadBalancer. Also responsible for maintaining high-traffic components in GKE, ex: RocketMQ (15k QPS), ELK (80k QPS) and Kafka (80k QPS). Provide backend engineers to monitor the alarm system through Prometheus & Thanos, and connect Alertmanager & Pagerduty in series for incident response. Cost Optimization Designing ELK with a high-availability & fault-tolerant architecture and replacing the GKE machine with a Spot instance. Using Promtail to real-time analyze the log data in Kafka, discover the application of redundant logs, and save the overall ELK log collection system cost up to 50%. Daily Operation Manage cloud resources on GCP through Terrafrom and implement best practices, such as managing various database passwords and keys through GCP Secret Manager with auto rotation. Use ArgoCD to deploy the backend application Helm/Kustomize repository on GitLab, and provide relevant technical consultation to backend engineers.

On-duty and stability operation Responsible for the monitoring and alarming, emergency response, capacity planning and new IDC deployment of the multi-region media processing platform. Analyze on-duty data, use indicators such as SLI, SLO, MTTR, etc... to make decisions, improve alarm rules, shorten fault recovery time, and optimize system stability and on-duty experience. Platform development Develop an automatic analysis system for accidents to assist decision-making and handling measures during the emergency response process, such as load reduction, rate limiting or traffic switching. Develop an automated server operation platform to handle scale up/down and abnormal machine recovery of large computing cluster.

Serverless Platform Using Knative Serving provides a fully managed multi-tenant deployment environment, based on a shared Kubernetes cluster for each project team, and with the configured ArgoCD as the only deployment entry and provides deployment notification integration, managed certificates etc... Status Page Report system of the operating status of each project. Participated in frontend and backend development. Taiwan Observability Platform Participate in the design and dispatch of a dashboard that makes it easy for each development team to find the status of their running applications in Kubernetes. Shared platform build and maintenance, such as Grafana, Grafana Loki, Promethus, Grafana Tempo Sentry and ArgoCD. Use ArgoCD ApplicationSet to manage the common components of most project Kubernetes clusters in Taiwan, such as Ingress Controllers Installation and maintenance. Dependency construction related to other working platforms, such as Kafka, Redis, Postgres, ClickHouse. LHCI Farm Use Argo Events and Argo Workflows to provide a fully-managed frontend web page Lighthouse report platform in Kubernetes. Consult Solve the intractable problems or bugs encountered by various development teams when using Kubernetes Offers advice on writing manifest yaml.

LINE MUSIC I participate with Korean colleagues to communicate and develop new APIs required for the APP side. And develop the GraphQL API for use in the web version of LINE MUSIC. Design a new architecture to improve the old architecture system, such as refactoring a monolithic application into a GRPC-based micro-service architecture, using Kafka to build a data pipeline to collect data and provide it to the data team for analysis. Self-Hosted ElasticeSearch, Filebeat and APM for log, application monitoring etc... LINE MUSIC LIVE Ticketing system architecture design and develop. The flash sale ticket purchase activity for the New Year's Eve concert that served 100,000 people.

LINE Today MRT Bus Info Use Vue.js to build a single-page application that allows users to query Taipei bus timetables, write unit tests, and deploy through PM2. LINE NOW Official website Develop a content management system for editors to edit official website content, use Koa.js MongoDB to develop RESTful API, and use docker-compose to deploy the entire system and integrate ELK to collect logs. TechPulse 2018 Event LINE Bot Just a LINE Bot developing in Java Spring Boot, MongoDB and Redis. CNY 2019 Event Main Page SPA event page is developed in Vue.js, Jest, TypeScript. LINE MUSIC LINE MUSIC is a music streaming service that uses Go to develop a ringtone API that connects with the LINE core platform and APIs required for cooperation with external manufacturers, such as recommendation, search and other functions. In addition, assist external manufacturers to import container technology from VM architecture, from building CI/CD pipeline to using Kustomize, Helm, ArgoCD, etc. to organize a large number of manifest files.