Infrastructure Engineer

TOPPAN NEXT TECH PTE. LTD.; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

TOPPAN NEXT TECH PTE. LTD. is seeking an Infra Engineer to deploy and manage secure, scalable infrastructure across on-prem, cloud, and hybrid environments in Singapore.

You will work with IoT devices, configure RHEL and Windows systems for high availability, and manage core network services. You will troubleshoot device, system, and network issues, implement VLANs, firewall rules, and load balancer basics, and maintain documentation for ongoing operations.

Qualifications

• Bachelor's degree in computer science, engineering, or a related field.
• Hands-on experience with RHEL and Windows Server in high-availability environments.
• Experience with Level 2 networking: TCP/IP, subnetting, DNS, DHCP, VLANs, routing, NAT.
• Firewall policy configuration and troubleshooting.
• Proficient with network troubleshooting tools: ping, traceroute, tcpdump, Wireshark.
• Knowledge of backup/restoration, virtualization (VMware/Nutanix/Hyper-V), and basic cloud concepts.
• Experience integrating and troubleshooting IoT and peripheral devices.
• Strong security practices: compliance hardening, network segmentation, PKI for certificate management.
• Familiarity with enterprise infrastructure environments and operational procedures.
• Good communication skills for working with vendors and stakeholders.

Responsibilities

• Deploy, configure, and optimize RHEL and Windows systems to ensure high performance and uptime.
• Implement and manage IoT device integration with backend systems.
• Troubleshoot and resolve device, system, and network issues promptly to minimize downtime.
• Perform network configuration and troubleshooting, including VLAN configuration, routing, firewall and ACL management, and load balancer basics.
• Deploy and maintain network infrastructure components (switches, routers, firewalls).
• Monitor system and network performance and proactively identify bottlenecks.
• Collaborate and communicate effectively with both technical and non-technical stakeholders.
• Analyze change requests and recommend improvements for scalability, performance, and security.
• Maintain infrastructure documentation (network diagrams, configurations, SOPs).

Education

Bachelor's degree in computer science, Engineering, or related field

Tools

RHEL

Windows Server

VMware

Nutanix

Hyper-V

Wireshark

tcpdump

traceroute

ping

DNS/DHCP

VLANs

Routing

Firewall policies

Load balancer basics

PKI

Job description

The Infra Engineer is responsible for deploying and managing secure, scalable infrastructure solutions that integrate seamlessly across on-premises, cloud, and hybrid environments. This role involves working with IoT devices and implementing solutions on both Windows and Linux platforms as well as managing network infrastructure.

Key Responsibilities

• Deploy, configure, and optimize RHEL and Windows systems to ensure high performance and uptime.
• Implement and manage IoT device integration with backend systems.
• Troubleshoot and resolve device, system, and network issues promptly to minimize downtime.
• Perform network configuration and troubleshooting, including:
  1. VLAN configuration, Routing (static/dynamic)
  2. Firewall and ACL rule management
  3. Load balancer configuration basic

• Deploy and maintain network infrastructure components (switches, routers, firewalls).
• Monitor system and network performance and proactively identify bottlenecks.
• Collaborate and communicate effectively with both technical and non-technical stakeholders.
• Analyze change requests and recommend improvements for scalability, performance, and security.
• Maintain infrastructure documentation (network diagrams, configurations, SOPs).

Requirements

• Preferably Bachelor's degree in computer science, Engineering, or related field.
• Technical hands-on experience with RHEL and Windows Server in high-availability environments.
• Technical hands-on experience in Level 2 networking, including:

1. TCP/IP, subnetting, DNS, DHCP, VLANs, routing, NAT
2. Firewall policy configuration and troubleshooting

• Hands-on experience with network troubleshooting tools, such as:

1. ping, traceroute, tcpdump, Wireshark

• Strong knowledge of backup & restoration, virtualization (VMware/Nutanix/Hyper-V), and basic cloud concepts.
• Experience integrating and troubleshooting IoT and peripheral devices.
• Strong understanding of system and network security best practices, including:

1. Compliance hardening, Network segmentation
2. PKI (Public Key Infrastructure) for certificate management

• Familiarity with enterprise infrastructure environments and operational procedures.
• Good communication skills for working with vendors and stakeholders.