Koh Zheng Wei

System Engineer at Visa

Singapore

About

Experience

  • Senior System Engineer at Visa
    May 2025 - Present · 1 yr 2 mos

  • M1 Limited (Full-time · 4 yrs 4 mos)
    • Lead Systems Analyst
      Jan 2025 - Apr 2025 · 4 mos

      Oversaw administration, procurement, and lifecycle management of enterprise DevTools & Platforms (Jira, Confluence, GitLab, Nexus, AKS), ensuring governance compliance across the toolchain. Provided strategic guidance to development teams on effective tool usage, DevSecOps practices, and workflow optimization. Championed platform reliability improvements through proactive monitoring and capacity planning.

    • Senior System Analyst
      Jan 2023 - Dec 2024 · 2 yrs

      Led the cloud migration of over 800 users for Jira and Confluence, ensuring minimal downtime and smooth transition. Administered and maintained enterprise DevTools & Platforms (Jira, Confluence, GitLab, Nexus, AKS). Utilized Terraform to provision and manage Azure infrastructure for scalable deployments. Designed and developed a Notification System handling 100K+ daily requests, scaling to peaks above 1 million. Implemented full-stack monitoring using Azure Application Insights for the Notification System.

    • System Analyst
      Jan 2021 - Dec 2022 · 2 yrs

      Implemented and maintained secure CI/CD pipelines in GitLab for diverse teams and components. Developed solutions with Azure Functions to support additional enterprise systems, including PRVS and MNP, as part of M1’s Digital Transformation Journey.

  • Undergraduate Teaching Assistant at National University of Singapore
    Jul 2020 - Dec 2020 · 6 mos

    Lead Teaching Assistant for CS3103 Computer Network Practices in AY20/21 Semester 1 Teaching Assistant for CS3203 Software Engineering Project in AY20/21 Semester 1

  • Software Engineering Intern at NodeFlair
    Oct 2019 - Jan 2020 · 4 mos

  • Undergraduate Teaching Assistant at National University of Singapore
    Aug 2019 - Dec 2019 · 5 mos

    Teaching Assistant for CS3103 Computer Network Practices in AY19/20 Semester 1