Build with a clear purpose.
Start with the workload, its constraints, and the people who depend on it. Choose the infrastructure that fits.
JOHNATHAN L. / SITE RELIABILITY ENGINEER
I build, secure, and operate infrastructure. From cloud platforms to blockchain networks, I turn complex systems into dependable foundations.

FOUR DOMAINS / ONE ENGINEERING PRACTICE
Explore each discipline through the systems I work on, the decisions behind them, and the professional experience that shaped my approach.

Cloud platforms, infrastructure as code, and the day-to-day discipline of keeping systems useful.

Model infrastructure, agent integrations, and development workflows that keep the engineer involved.

Full and archive nodes, blockchain data services, network upgrades, and the tools around them.

Proof-of-concept validation, code analysis, threat intelligence, and secure operational workflows.
HOW I WORK
My work sits at the intersection of reliability, automation, and security. I bring production operations and security analysis into the same conversation.
Explore my professional experienceStart with the workload, its constraints, and the people who depend on it. Choose the infrastructure that fits.
Use monitoring, clear runbooks, and incident investigation to understand how systems behave in practice.
Apply code, deployment workflows, and AI tools thoughtfully, with security and operational control in view.
THE LOCAL SIDE OF THE CLOUD
Local compute and storage complement cloud services. This is where I explore model serving, infrastructure tooling, and recovery workflows.

BSc (Hons) Information Security · The Hong Kong Polytechnic University · 2019