System Engineer & DevOps

Arquilao Ruiz

I build production web systems, write the pipelines that deploy them, and manage the hardened Linux infrastructure that keeps them running.

Selected works

Open to full-time roles

Location Philippines (UTC+8)

Response < 24h

Selected Works

Agera Finance

How do you deploy a financial management system with no maintenance windows and instant rollback when something goes wrong?

Ubuntu VPS: server hardening, UFW, Fail2ban, SSH key auth
Docker Compose: LAMP stack containerization, service isolation
Nginx: reverse proxy, SSL termination via Certbot
GitHub Actions: automated build, test, and blue/green deploy pipeline
Bash cron: scheduled DB dumps with rolling retention

Screenshot of PUP Bataan student record system

PUP Bataan: Student Inventory Record System

An institutional platform that needed full observability and the ability to survive peak-traffic exam periods without downtime.

Azure Ubuntu VPS: provisioning, network security groups, domain config
Docker Compose: containerized PHP + MySQL + Redis stack
Prometheus + Node Exporter: system metrics and alert evaluation
Grafana + Loki + Promtail: dashboards and centralized log aggregation
GitHub Actions: zero-downtime rolling deployments with health checks

ESL Personal Finance Tracker

A finance analytics tool for ESL teachers that needed real-time income calculations and interactive charts without a heavy frontend framework.

PHP: application logic, session security, server-side data processing
MySQL: relational schema, indexing, expense classification queries
Chart.js: interactive income and expense visualizations
Vanilla JS ES6+: async data fetching, DOM state management
Tailwind CSS: responsive utility-first layout

About

I'm a software developer who expanded into Linux administration, infrastructure, and DevOps. I started with building web applications, then moved deeper into the systems. Behind them learning Linux, Bash scripting, containerization, CI/CD, security, and monitoring. That experience shaped how I approach software today: not just building applications, but understanding how they are deployed, secured, automated, and kept running reliably.

Today that means full-stack applications with containerized services, reverse proxies, and automated zero-downtime deployments. I care about the system, and deployment pipelines that eliminate human error, and code that is observable and maintainable.

Reliable technology, measured and monitored, beats fragile complexity every time.

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Interested in

Linux server administration Ubuntu VPS: hardening, SSH, UFW, Fail2ban
Container orchestration Docker, Docker Compose, service isolation
CI/CD pipeline engineering GitHub Actions, blue/green deployments, zero-downtime rollouts
Production observability Prometheus, Grafana, Loki, Promtail, Node Exporter
Full-stack web development PHP, Python, JavaScript, MySQL, Redis
Automated security & backup Certbot SSL renewal, cron-driven DB backup rotation