Linux Engineer | Manila, Philippines

Trinity Consulting; Manila; On-site; PHP 1,200,000 - 1,800,000; Full time

Job summary

Trinity Consulting in Manila, Philippines is seeking an experienced Linux Engineer with 8+ years in enterprise Linux administration, OS hardening, and security. You will design, deploy, secure, and operate RHEL and NixOS, implement firewall policies with nftables and iptables, and enable container networking with Cilium, along with intrusion detection tools.

This on-site role offers exposure to immutable OS architectures, kernel tuning, and cross-functional collaboration with security, DevOps,

Qualifications

• Bachelor's degree in Computer Science, Cybersecurity, Information Technology, or a related technical discipline.
• 8+ years of progressive professional experience in enterprise Linux system administration and network security.
• Experience with RHEL and declarative OS models like NixOS.
• Proficient with nftables/iptables and Linux netfilter subsystems.
• Experience deploying Cilium eBPF networking, Suricata IDS, and Zeek network analysis.
• Knowledge of immutable OS architectures and kernel performance profiling.

Responsibilities

• Architect, deploy, configure, harden, and maintain enterprise Red Hat Enterprise Linux (RHEL) and NixOS server environments.
• Design and enforce robust host-based firewall policies utilizing nftables, iptables, and kernel-level packet filtering.
• Implement advanced container networking, eBPF data planes, and network security policies using Cilium.
• Deploy, tune, and manage intrusion detection and network security monitoring tools including Suricata and Zeek.
• Research, test, and deploy immutable operating system architectures to enhance system integrity and reduce attack surfaces.
• Troubleshoot complex Linux kernel panics, memory leaks, performance bottlenecks, and storage I/O issues.
• Collaborate with security incident response teams, DevOps squads, and network administrators during audits.
• Author runbooks, kernel tuning guidelines, security hardening checklists, and compliance reports.

Skills

RHEL

NixOS

Firewall configuration

Kernel hardening

Container networking

English communication

Education

Bachelor’s degree in Computer Science/IT/Cybersecurity

Tools

nftables

iptables

Cilium

Suricata

Zeek

eBPF

Job description

Position Summary:

We are actively seeking an experienced, high-caliber, and technical Linux Engineer with 8+ years of progressive professional experience in enterprise Linux system administration, OS hardening, network security, and immutable infrastructure to join our technology team on a full-time permanent on-site basis in Manila, Philippines. In this critical systems and security engineering role, you will be responsible for designing, deploying, securing, and operating advanced Linux operating system environments, custom networking stacks, and intrusion detection frameworks. You will leverage your deep specialist expertise in RHEL, NixOS, nftables, iptables, firewalls, Cilium, Suricata, Zeek, and immutable OS architectures to deliver uncompromised host security, kernel optimization, and operational resilience. This opportunity offers competitive compensation, executive technical visibility, and exceptional career growth prospects within a premier global technology consulting and enterprise IT recruitment ecosystem.

Detailed Job Description:

As a Linux Engineer supporting enterprise infrastructure operations in Manila, Philippines, you will take full operational, tactical, and technical ownership of Linux system engineering, kernel hardening, network packet filtering, host-based intrusion detection, and container networking security. Your day-to-day responsibilities include deploying and administering Red Hat Enterprise Linux (RHEL) and NixOS, configuring nftables and iptables firewall rules, implementing advanced container networking via Cilium, deploying security monitoring tools like Suricata and Zeek, managing immutable OS deployments, troubleshooting complex kernel and performance bottlenecks, and collaborating closely with security operations and platform engineering squads. You will utilize your proactive troubleshooting and analytical problem-solving skills to resolve complex host security anomalies under strict enterprise service level agreements.

• Architect, deploy, configure, harden, and maintain enterprise Red Hat Enterprise Linux (RHEL) and NixOS server environments.
• Design and enforce robust host-based firewall policies utilizing nftables, iptables, and kernel-level packet filtering.
• Implement advanced container networking, eBPF data planes, and network security policies using Cilium.
• Deploy, tune, and manage intrusion detection and network security monitoring tools including Suricata and Zeek.
• Research, test, and deploy immutable operating system architectures to enhance system integrity and reduce attack surfaces.
• Troubleshoot complex Linux kernel panics, memory leaks, performance bottlenecks, and storage I/O issues.
• Collaborate seamlessly with security incident response teams, DevOps squads, and network administrators during audits.
• Author meticulous Linux engineering runbooks, kernel tuning guidelines, security hardening checklists, and compliance reports.

• Bachelor’s degree in Computer Science, Cybersecurity, Information Technology, or a related technical discipline.
• Minimum of 8+ years of progressive professional experience in enterprise Linux system administration and network security.
• Strong, demonstrable hands-on operational experience with Red Hat Enterprise Linux (RHEL) and declarative OS models like NixOS.
• Deep practical proficiency in advanced firewall configuration using nftables, iptables, and Linux netfilter subsystems.
• Proven operational experience deploying and managing Cilium eBPF networking, Suricata IDS, and Zeek network analysis.
• Solid practical experience working with immutable operating systems, container security, and kernel performance profiling.
• Exceptional analytical, troubleshooting, debugging, and problem-solving capabilities under high-pressure enterprise environments.
• Excellent written and verbal English communication skills with strong cross-functional collaboration abilities.
• Mandatory legal work eligibility and physical availability for full-time on-site operations in Manila, Philippines.

• Professional certifications such as Red Hat Certified Engineer (RHCE) or Linux Professional Institute Certified (LPIC-3).
• Hands-on familiarity with Kubernetes cluster administration, service meshes, and eBPF observability tools (Pixie, Hubble).
• Prior professional working experience in top-tier financial institutions, defense contractors, or enterprise security operations centers.
• Advanced knowledge of kernel compilation, SELinux policy authoring, and cryptography standards.

Employment Details:

• Salary/Rate: Market Competitive / Enterprise Technology Package
• Deadline: Open until filled (Urgent Manila On-Site Opening)
• Notice Period: Immediate to 30 Days Preferred
• Contract Duration: Permanent / Full-Time On-Site Engagement (Manila, Philippines)