Summary
Overview
Work History
Education
Skills
Certification
Languages
Speakers
Timeline
Generic

SHOTA YOSHIMURA

Asaka

Summary

Adept at driving technological advancements, I spearheaded the development of a Kubernetes platform at LY Corporation, managing over 1,600 clusters, which significantly enhanced system reliability and performance. My expertise in Docker, Kubernetes, and proactive problem-solving has consistently improved operational efficiencies. Demonstrated leadership in migrating NTT Communications' data analytics to a robust Kubernetes environment showcases my ability to innovate and collaborate effectively.

Overview

13
13
years of professional experience
1
1
Certification

Work History

Software Engineer

LY Corporation
Chiyoda-ku, Japan (Remote)
08.2020 - Current
  • Developed and operated a private Kubernetes as a Service platform managing over 1,600 clusters, 60,000 nodes, and 110,000 containers.
  • Developed and maintained a system for deploying essential Kubernetes add-ons such as Prometheus, kube-state-metrics, and CoreDNS to enhance observability and functionality across 1,600+ clusters.
  • Developed E2E tests to ensure the stability and reliability of Kubernetes clusters, and conducted ongoing research on the latest patch releases.
  • Created and maintained comprehensive documentation for users, covering Kubernetes usage, troubleshooting, and best practices, reducing Kubernetes-related inquiries by 60%.
  • Provided technical support to users, assisting with troubleshooting and answering questions related to Kubernetes.
  • Led the development and user support team, coordinating with other teams and managing team progress.
  • Successfully reduced resource consumption by 60,000 nodes through regular optimization of DaemonSet managed by addons.
  • Successfully implemented a daily vulnerability scanning process for container images managed by addons, consistently maintaining a zero-vulnerability state.

Infrastructure/Big Data Engineer

NTT Communications
Chiyoda-ku, Japan
02.2018 - 07.2020
  • Developed a large-scale big data analytics platform capable of processing hundreds of terabytes of data using Hadoop, Kafka, and Presto. Engineered robust data pipelines to ensure efficient data ingestion and transformation.
  • Successfully migrated container orchestration from Docker Swarm to Kubernetes, significantly improving scalability, reliability, and manageability.
  • Built a comprehensive data science platform for 20-30 data scientists, utilizing RStudio, JupyterLab, Metabase, and Tableau to facilitate efficient data exploration and analysis.
  • Developed a robust monitoring infrastructure for 40-50 servers using Prometheus, Grafana, Loki, VictoriaMetrics, and Alertmanager, enabling proactive issue detection and resolution.
  • Implemented a modern development environment for a team of approximately 100 developers, leveraging GitLab, Mattermost, HackMD, and Growi to foster collaboration and improve development efficiency.

Infrastructure Engineer

NTT Comware
Minato-ku, Japan
04.2012 - 01.2018
  • Developed systems for large-scale enterprise companies with over 10,000 employees.
  • Led a project to modernize a legacy call center system for a telecommunications company, replacing it with a Solr/PostgreSQL-based solution. This significantly improved search performance and reduced maintenance costs.
  • Successfully migrated a telecommunications company's legacy business processes to a modern platform utilizing Intra-mart (BPM) and Alfresco (ECM), streamlining workflows and document management.

Education

Master of Science - Electronic And Information Engineering

Tokyo University of Science
Chiba, Japan
03-2012

Bachelor of Science - Electronic And Information Engineering

Tokyo University of Science
Chiba, Japan
03-2010

Skills

  • Container: Docker, Kubernetes
  • OS: Windows, Linux (RHEL, Ubuntu)
  • Language: Go, Java, SQL, PromQL
  • BigData: Hadoop, Spark, Kafka, Presto
  • CI/CD: GithubActions, ArgoCD, GitLabCI
  • Monitoring: Prometheus, Grafana, Loki, Thanos, Alertmanager, Zabbix
  • DB: PostgreSQL, MySQL, OracleDB
  • BI: Tableau, RStudio, JupyterLab, Metabase
  • Workflow: JP1, Crane

Certification

  • Kubernetes Certification, CKAD/CKA - Cloud Native Computing Foundation.
  • Professional Cloud Architect - Google Cloud Certification.
  • System Architect - Information-technology Promotion Agency, Japan(IPA).

Languages

Japanese
Native language
English
Intermediate
B1

Speakers

  • "Kubernetes Observability Introduction" at Observability Conference 2022.
  • "Modernizing Infrastructure Design in a Traditional Enterprise" at July Tech Festa 2020.
  • "Kubernetes Introduction" at NTT Tech Conference 2020.
  • "Kubernetes Logging Introduction" at CloudNative Days Tokyo 2019.

Timeline

Software Engineer

LY Corporation
08.2020 - Current

Infrastructure/Big Data Engineer

NTT Communications
02.2018 - 07.2020

Infrastructure Engineer

NTT Comware
04.2012 - 01.2018

Master of Science - Electronic And Information Engineering

Tokyo University of Science

Bachelor of Science - Electronic And Information Engineering

Tokyo University of Science
SHOTA YOSHIMURA