Senior Backend Engineer with a strong track record in designing scalable systems. Core expertise spans across PHP / Node.js, robust Linux server administration, containerized deployments with Docker, advanced workflow automation using n8n, and the design of intelligent AI Chatbots. Committed to a security-first mindset — proactively auditing for potential vulnerabilities and enforcing best practices at every stage of development. Passionate about leveraging these core skills to deliver performant, highly-available products from the ground up to deployment.
Web Developer | FGC Techlution (in partnership with Sydney Ecommerce — a B2B E-Commerce Solutions Pty Ltd, Australia) | 02/2021 - Present and 05/2017 - 07/2020
- Develop and maintain scalable web applications using PHP (Laravel, WordPress, Magento 1 & 2).
- Build and customize plugins/extensions for WordPress and Magento sites.
- Integrate front-end elements and build cross-platform mobile applications using React Native.
- Configure, install, and autonomously operate CentOS/Ubuntu web servers on Virtual Private Servers.
- Actively train, manage, and provide technical guidance to software engineering interns.
Backend Developer | NTQ Solution (Ha Noi, Vietnam) | 09/2020 - 02/2021
- Maintained a chat application ecosystem utilizing the Rocket.Chat framework, including builds for macOS, Windows, and mobile apps.
- Developed new custom functions and architectural extensions for Rocket.Chat.
- Mentored and guided junior developers and interns to align with modern best practices.
I am an adaptable and results-driven engineer, leveraging a deep technical stack to build robust, scalable systems:
Backend & API Development
- Capabilities: Full-stack web development with the ability to manage the entire website lifecycle — from requirements planning, system architecture design, backend/frontend implementation, to server deployment and SEO optimization. Extensive production experience with PHP (Laravel as primary framework, with deep proficiency across CodeIgniter, Symfony, CakePHP, Yii) and Node.js (NestJS, ExpressJS) ecosystems. Proven ability to architect and deliver RESTful & GraphQL APIs, real-time communication systems via WebSocket, and microservices at scale. Strong focus on query optimization, caching strategies, high-availability architecture, and security best practices (OWASP, JWT, rate limiting).
- Tech Stack: PHP (Laravel, CodeIgniter, Symfony, CakePHP, Yii), Node.js (NestJS, ExpressJS, Strapi, Koa), Python.
- Databases: MySQL, MariaDB, PostgreSQL, MongoDB, SQLite, Redis, Memcached.
CMS, E-commerce & Odoo Enterprise
- Capabilities: Capable of developing solutions across any business domain as required. Extensive experience building custom plugins, modules, and Shopify apps for WordPress/WooCommerce, Magento 1 & 2, Shopify, and Odoo. Notably developed numerous payment gateway and shipping/logistics plugins tailored for the Australian market. Enterprise-grade Odoo implementation and addon development.
- Tech Stack: Odoo (16/17/18), WordPress/WooCommerce, Magento 1 & 2, Shopify (App Development), Strapi, Nestjs.
DevOps, System Administration & Networking
- Capabilities: Hands-on experience in CI/CD pipeline design for both websites and software products using GitHub Actions, GitLab CI/CD Pipelines, Jenkins, and Drone.io — automating the full delivery cycle including code review, linting, unit testing, Docker image builds, and automated deployments to dev/staging/production environments. Complete lifecycle management of on-premise and cloud infrastructure encompassing server provisioning, reverse proxy configurations (Traefik, NGINX), load balancing, SSL/TLS automation, and advanced network routing.
- Cloud & CDN: AWS (EC2, S3), DigitalOcean, Vultr, Cloudflare (Cache Rules, Workers, Tunnels).
- Hardware & Networking: DELL Enterprise Servers (R730XD, R640), iDRAC, Proxmox VE, Synology NAS, RAID. 2.5Gb/10Gb LAN, Mikrotik routers (NAT, firewall, VLAN, multi-WAN).
- DevOps Tools: Linux, Docker, Portainer, Traefik, NGINX, Apache, Jenkins, GitLab CI, GitHub Actions, Drone.io.
Integration, AI & Automation
- Capabilities: Architecting advanced workflows for multi‑system integrations, web scraping, and business process optimization. Custom n8n node development. Self-hosting AI platforms and building intelligent, context-aware chatbots.
- Tech Stack: n8n (integration, automation, self-hosting), Dify.ai (self-hosting, chatbot development), OpenAI/LLMs.
IoT & Smart Home Ecosystems
- Capabilities: Designing and deploying local-first smart home ecosystems focusing on privacy and reliability without third-party cloud dependency.
- Tech Stack: Home Assistant, Arduino, Zigbee, Raspberry Pi.
Frontend Development
- Tech Stack: ReactJS, Vue.js / Nuxt.js, Ant Design, TanStack Query.
Mobile Development
- Capabilities: Developed cross-platform mobile applications using React Native and successfully published apps on the Google Play Store. While not a dedicated mobile specialist, fully confident in independently handling any mobile development task end-to-end.
- Tech Stack: React Native, Android Studio, Expo.
FPT Polytechnic College of Ha Noi | 2013 - 2016
- Major: Software Applications
- Degree Classification: Very Good
- Year of Birth: 1994
- Marital Status: Married
- Location: Cua Lo, Nghe An, Vietnam
- Email: khoazero123@gmail.com
- Phone: +84 963 212 280
- Actively seeking full-time opportunities as a Backend Engineer or DevOps Specialist in a dynamic product or tech company.
