Apr 2021
Apr 2021
Apr 2021
Experience
My Career Journey — scroll down to explore each milestone.
IT Specialist
IBM Japan
2021-04-01 - 2021-08-31
- ▹Joined as a new graduate, gaining foundational experience in infrastructure.
Projects
Migration to IBM Cloud
2021-07-01 - 2023-07-01
- ▸Provided support in migrating systems from on-premises to IBM Cloud, ensuring seamless transitions.
- ▸Utilized Ansible to automate processes, enhancing operational efficiency.
- ▸Delivered ongoing operational support for Red Hat Enterprise Linux and Windows Server environments on IBM Cloud.
LinuxWindows ServerAnsibleVMwareIBM Cloud
Infrastructure Specialist
Kyndryl Japan
2021-09-01 - Present
- ▹Built upon a foundation in infrastructure and databases, I proactively took on application development projects to broaden my technical expertise.
Projects
Migration to AWS
2023-03-01 - 2023-05-31
- ▸Joined as a tester, and I tested each components especially AWS Control Tower and AWS Organizations.
AWS
Backend API Infrastructure Development
2023-07-01 - 2025-11-30
- ▸Configured rsyslog to handle dynamic Pod scaling (up to 3 Pods) and failover scenarios, ensuring robust log collection from Vector. This architecture supports future expansion to handle increased log volume and additional Kubernetes clusters.
- ▸Developed a shell script to automate the generation of monthly uptime statistics by processing Prometheus-collected metrics, reducing manual report preparation time by 80%.
PostgreSQLKubernetesOpenShift
B2B Internet Banking System Upgrade
2023-07-01 - Present
- ▸Identified LDAP authentication SQL queries were performing 5–6 times slower than baseline; developed and implemented a Shell script to add necessary indexes and schedule daily statistics updates, resulting in roughly 80% improvement in query performance, restoring processing speeds to baseline levels.
- ▸Developed a Shell script that automated the monthly password update process for DB users by securely handling inputs from the existing password issuance system, eliminating approximately 12 hours of manual work annually.
- ▸Deployed resilient backup and restore strategies to ensure high reliability, collaborating with stakeholders to define data retention policies that comply with regulatory standards and align with organizational objectives.
Db2Shell ScriptLDAP
LLM Chat Application with Gemini Development
2024-06-01 - 2024-08-31
- ▸Improved response generation by transitioning from a LangChain toolkit handling only structured-data queries to a hybrid logic that identifies general versus analytics requests.
- ▸Reduced SQL generation errors by over 90% by developing a custom prompt template that filtered out unsupported syntax and ensured Gemini generated SQL fully compatible with BigQuery.
PythonLangChainStreamlitGeminiGoogle Cloud
Python Application Workshop Development for Internal
2025-05-01 - 2025-10-07
- ▸Led a structured three-phase internal Python application workshop; (1) introduced REST API fundamentals, (2) advanced to GitHub API HTTP-method implementation and response data manipulation using session_state, and (3) applied the Microsoft Graph API to catalyze workflow automation for attendees’ business tasks.
- ▸Conducted an 11-day pilot with 40 selected participants; 25 distinct users accessed the service (~63% uptake) so far, confirming high early demand and readiness for wider rollout.
PythonStreamlitFastAPIPodmanMkDocs