HAProxy

High-Performance Load Balancing

I have hands-on experience with HAProxy, managing it as a critical component for routing traffic and ensuring the availability of backend services.

My most significant project with HAProxy at Carousell Group involved modernizing a legacy instance that was serving as the primary entry point for our services. This project included upgrading both the HAProxy software to a recent, stable version and migrating its underlying operating system.

The modernization effort achieved several key outcomes:

• Improved Security: Patched critical vulnerabilities present in the older version.
• Enhanced Observability: Enabled modern logging formats that could be ingested by our centralized logging platform, providing better visibility into traffic patterns.
• Increased Automation: Developed a tool to automatically update the load balancer's configuration to allowlist dynamic Cloudflare IPs, removing the need for manual intervention and strengthening our security layers.

Key Competencies

• HAProxy Administration: Managing and configuring HAProxy for production traffic.
• System Modernization: Planning and executing upgrades for critical legacy systems.
• Load Balancing Concepts: Deep understanding of load balancing algorithms and strategies.
• Networking & Security: Configuring ACLs and other security features on a load balancer.