Senior Network Engineer

FIRMUS METAL INTERNATIONAL PTE. LTD.; Singapore; On-site; SGD 90,000 - 120,000; Full time

Job summary

Firmus Technologies is seeking a Network Engineer/Senior Network Engineer to lead the development of network designs and support AI infrastructure deployments. You will work with the Engineering and Technology team to drive secure, scalable networking across on-prem and cloud-connected environments.

The role emphasizes IaC, automation, network security, and collaboration with security and operations teams. International and domestic travel may be required, with mentorship duties for junior

Qualifications

• Bachelor’s degree in network engineering, CS, or related field.
• 5+ years in network engineering with AI infrastructure focus.
• Experience with Linux systems and host network configuration.
• Strong project management skills and ability to lead complex projects.
• Willingness to undertake international and/or domestic travel for deployments.

Responsibilities

• Design, implement and maintain corporate LAN/WAN/WLAN/VPN infrastructure.
• Develop IaC configurations and CI/CD pipelines for network changes.
• Implement firewall rules and zero-trust policies; coordinate with security teams.
• Monitor, diagnose and resolve network issues; coordinate with vendors.
• Mentor junior engineers and maintain technical documentation.

Skills

Project management

Problem solving

Communication

Teamwork

Travel willingness

Education

Bachelor’s degree in network engineering, computer science, or a related technical field

Tools

Ansible

Netbox

Python

Cumulus Linux

Sonic

NVIDIA InfiniBand

RoCE

Job description

Role Summary

Firmus Technologies is seeking a skilled Network Engineer / Senior Network Engineer to join our

Engineering and Technology team. The ideal candidate will play a crucial role in leading the

development of our network designs and supporting the network deployment for AI infrastructure

projects. This role offers an exciting opportunity to work at the forefront of AI networking technology

and contribute to the growth of AI infrastructure.

Key Responsibilities

Design, Implement and Maintain Network Infrastructure

• Architect, deploy, support the corporate LAN, WAN, WLAN, and VPN infrastructure.
• Ensure high availability, performance and security of on-premise and cloud-connected

network services.

• Setup, configure and maintain secure site-tp-site VPNs, MPLS links, or private interconnects between data centres, customer site, cloud environments and partner networks.

Network as Code and Automation

• Develop and maintain automated network configurations using Infrastructure as Code (IaC) tools (eg: Ansible, Netbox, Python scripts)
• Implement CI/CD pipelines for network changes to improve speed, consistency, and auditability
• Automate routine tasks such as provisioning, backups and compliance checks.

Network Security and Policy Enforcement

• Implement and manage firewall and security devices. Apply firewall rules, VLAN segmentation, ACLs and zero-trust principles to safeguard internal and external communications.
• Collaborate with SMC Security and Risk team to enforce policies and respond to security incidents.

Operation Support

• Respond and resolve upgrade network issues, outages and performance degradations across the SMC Corporate and Compute network infrastructure.
• Analyze logs, run diagnostics and coordinate with vendors, carriers as needed.
• Work with internal observability team to setup and maintain monitoring tools to proactively identify bottlenecks, errors and abnormal behaviours.
• Analyze trends for bandwidth, hardware utilization, and growth to inform scaling and make recommendation to procurement decisions.
• Design and rest redundant paths, failover mechanisms and DR playbooks to ensure uninterrupted connectivity during outages or maintenance.
• Participate in operation standby roster and on-call for time to time.

Project Management and Stakeholder Management

• Support the deployment team in their project management and resource allocation for the network portion of AI cluster installations.
• Collaborate and work closely with Global Operation Centre, Software Defined Infrastructure team, Data Centre Infrastructure team and Solution Architects to support deployments and to maintain SLAs.

Technology Expertise

• Maintain and expand expertise in physical network hardware and advanced networking technologies, including (i) NVIDIA InfiniBand; (ii) Spectrum Ethernet Platform, and (iii) RDMA over Converged Ethernet (RoCE).
• Familiar with open source network operating systems such as Cumulus Linux and Sonic
• Maintain and expand expertise in NetDevOps practices to maintain software defined network infrastructure
• Provide technical support and troubleshooting for advanced networking technologies, escalating to vendors as needed.
• Mentor junior network engineers, assisting with their technical development.

Stakeholder Management

• Work closely with both Firmus Engineering and Commissioning teams to align network infrastructure with customers’ requirements.
• Facilitate knowledge sharing and communication between teams and create and maintain comprehensive technical documentation.
• Maintain and build strong relationships with key technology partners and vendors and proactively manage and coordinate partner engagement on site.

Skills & Experience

• Bachelor’s degree in network engineering, computer science, or a related technical field.
• 5+ years of experience in network engineering, with a focus on AI infrastructure.
• Experience in Linux systems especially host network configuration.
• Strong project management skills and experienced in complex technical projects.
• Excellent problem-solving and analytical skills.
• Ability to work independently and as part of a team.
• Strong communication skills, both written and verbal.
• Willingness to undertake international and/or domestic travel for on-site deployments and commissioning.
• Solid understanding of advanced networking technologies, particularly those related to AI would be highly advantageous.
• Hands-on experience with NVIDIA InfiniBand, Spectrum Ethernet Platform, and/or RDMA over Converged Ethernet (RoCE) preferred.