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KAI YI lim

@kaiyilim

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Experienced Systems Engineer specializing in Linux and cloud infrastructure.

New Zealand

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What I'm looking for

I am looking for a role that fosters innovation, encourages collaboration, and offers opportunities for professional growth.

I am an experienced Systems Engineer with a strong focus on Linux administration and cloud infrastructure management. Over the years, I have honed my skills in full-stack server setup, security hardening, and performance optimization. My journey has been marked by significant achievements, such as leading a successful migration from CentOS 7 to AlmaLinux 9, which improved operational efficiency and reduced server maintenance time.

At DoubleDot Media, I have deployed high-performance web applications and developed Ansible playbooks for automated configuration tasks. My expertise extends to containerization with Docker and implementing AWS S3-based backups, which have drastically reduced operational costs. I am passionate about leveraging technology to solve complex problems and enhance system performance.

Experience

Work history, roles, and key accomplishments

Current

Systems Engineer

Current

DoubleDot Media

Jan 2016 - Present (9 years 5 months)

Led system migrations from CentOS 7 to AlmaLinux 9, ensuring software compatibility. Managed full-stack LAMP/LEMP server setups, optimizing performance and resources. Developed Ansible playbooks for automated configuration, implemented AWS S3 backups with Glacier policies, and replaced third-party monitoring with Zabbix. Enhanced email deliverability via SPF/DKIM/DMARC, implemented Cloudflare for

AlmaLinux Ansible AWS S3 Zabbix Cloudflare Docker Apache Nginx

Principal Engineer

VYPNET

Jan 2014 - Dec 2016 (2 years 11 months)

Managed full-stack website setups, including domain registration, DNS, server configuration (web, database, email), and security. Integrated website with databases and payment services like PayPal. Developed marketing strategies and provided comprehensive customer support, maintaining Q&A documentation.

DNS SSL Apache MySQL Postfix Configuration Management Customer Support

Internship

Huacomm Telecommunication

Jan 2011 - Mar 2011 (2 months)

Provided onsite broadband support for hotels, resolving guest connectivity issues. Configured switches, network routers, bandwidth controls, and port forwarding. Set up security camera networks and gateways, connecting hotel room networks to switches.

Networking Switching Routers network settings

Operations Engineer

Jinny Software Limited (Enghouse Network)

Jan 2011 - Dec 2014 (3 years 11 months)

Provided operational support for telco companies across APAC, troubleshooting software and system issues and managing customer tickets per SLA. Delivered GSM value-added services projects including SMS, MMS, USSD, Voicemail, and VoIP. Managed project implementations, including hardware setup, application configuration, system integration, testing, and cutovers.

Linux Bash Scripting System Administration GSM Network Troubleshooting SLA Management Implementation System Integration

Education

Degrees, certifications, and relevant coursework

Multimedia University

Bachelor’s Degree, Software Engineering

2008 - 2010

Completed a Bachelor's Degree focused on Software Engineering. Studied core principles of software development, programming languages, and system design.