I have been working as a DevOps engineer, involved in the design, development, and operation of data infrastructure and message delivery platforms. I enjoy improving platform operations and automating processes. I have identified causes and implemented permanent solutions, contributing to open-source software as necessary to make improvements.Additionally, as a Machine Learning engineer in the past, I developed services utilizing location data. I am also interested in building platforms for machine learning.
□ Development and operation of data infrastructure (2023/06/16 ~ current)
- Building a DevOps culture. Organizational setup such as delegation of authority.
- Establishing an environment where developers can build CI/CD on their own.
- To advance the Infrastructure as Code (IaC) for the data infrastructure, I shared knowledge about Terraform and facilitated its implementation.
- Proposal and implementation of operational improvements.
- Designing, developing, and operating the data infrastructure to make the operation easy.
- Lead migration project from a technical perspective
Technologies used: AWS / Terraform / Databricks / dbt / Python / Spark
AWS: S3 / Athena / Glue / Lambda / Step Functions / CodePipeline / CodeBuild / CodeCommit / EventBridge..etc
□ OSS Contribution
- terraform-provider-databricks
- terraform-provider-aws
- dbt-databricks
https://github.com/case-k-git/oss-contribution
□ Development and operation of data infrastructure (2020/03 ~ 2022/04)
- Development and operation of a company-wide real-time data infrastructure
- Infrastructure design and development of Redash
- Replacement of the legacy company-wide common data infrastructure
- Operation of the log collection infrastructure
- Data linkage of on-premises, AWS, GCP, and external systems both batch and streaming job
- Implementation of data governance and confidential information management mechanisms
- Cost optimization and operational improvements and automation for the data infrastructure
Technologies used: AWS / GCP / Java / Go / Python / Ruby / Embulk / fluentd / Digdag / Terraform / CircleCI / GitHub Actions / MySQL / PostgreSQL / SQL Server / Swagger
□ Development and operation of delivery infrastructure (2020/03~ 2020/06, 2022/04 ~ 2023/05)
- Development and operation of the delivery infrastructure
- Development and operation of the data collaboration infrastructure for delivery
- Operational improvements and automation
Technologies used: AWS / GCP / JBoss Data Grid / Spring / Ruby on Rails / Firebase / LINE@ / MPSE / Java / Go / Python / Ruby / Embulk / Digdag / Terraform / CircleCI / GitHub Actions / PostgreSQL / SQL Server / Datadog / Swagger
AWS:OpsWorks / S3 / ECS / EC2 / ALB / Fargate / Lambda / Cloud Formation / Transit Gateway / Direct Connect / Aurora / EC2 Image Builder / CloudWatch / Kinesis / ElastiCache
GCP:BIgQuery / Cloud Pub/Sub / Cloud Dataflow / Cloud Functions / Cloud Datastore/ Cloud SQL / GCS / GKE / GCE / Cloud Run / SharedVPC / Firebase / Cloud Logging / Cloud Monitoring
◻︎OSS Contribution
- embulk-output-bigquery
- fluent-plugin-gcloud-pubsub-custom
- beam
- redash
https://github.com/case-k-git/oss-contribution
□ Development of a signage planning system utilizing location information (2017 06 ~ 2020 02)
- Analyzer geo location data and create signage delivery segments using location information
- Design of anomaly detection logic included in ad requests (RTB)
- Support for purchase evaluation of data
- Lead project and manage development team member
- Performance tuning of planning system
Technologies used: BigQuery / Jupyter Notebook / Machine Learning / React / Node.js / Postgres / Python / CartoDB
□ Application development (2016 06 ~ 2017 05)
Development of iOS/Android apps for group companies
Technologies used: Firebase / Realm/ MySQL / Laravel /Android / Swift / PHP
Infrastructure:GCP / AWS / Kubernetes
undefinedOSS Contribution
https://github.com/case-k-git/oss-contribution/blob/main/README.md
Talk
https://speakerdeck.com/casek/zozotown-real-time-linkage-infrastructure
https://speakerdeck.com/casek/zozo-bigquery-policy-tag-usage
Company Tech Blog
https://techblog.zozo.com/entry/real-time-data-linkage-infrastructure https://techblog.zozo.com/entry/data-infrastructure-replacement https://techblog.zozo.com/entry/image-builder-for-redash
https://techblog.zozo.com/entry/bigquery-flex-slots https://techblog.zozo.com/entry/policy-tag-usage-to-protect-bigquery-sensitive-data https://techblog.zozo.com/entry/eliminate-notification-system-alert https://techblog.zozo.com/entry/ma-realtime-data-infrastructure-replacement
AWS Certified Solutions Architect – Associate
AWS Certified Solutions Architect – Associate
Google Cloud Certified Professional Data Engineer/ expire
Oracle Certified Java Programmer, Silver SE 8
TOEIC 875