Full Stack Infra Engineer: Build Secure, Scalable Networks

Red Alpha; Singapore; On-site; SGD 70,000 - 110,000; Full time

Job summary

Red Alpha Cybersecurity is seeking a Full Stack Infra Engineer to design, implement, and maintain robust infrastructure across LAN, WAN, and cloud environments. You will work on project work and daily operations of mission-critical systems, with growth opportunities across networking, infrastructure, and cybersecurity.

You will configure and manage Windows/Linux servers, virtual machines, databases, and security devices, while practicing ITIL-based operations and change management to meet SLAs.

Qualifications

• CCNA certification is required.
• CCNP certification is a strong advantage.
• Familiarity with Microsoft Windows Server, Linux/Unix OS, and VM environments.
• Basic database knowledge (e.g. SQL Server, Oracle).
• Hands-on experience with networking devices (e.g. Cisco routers/switches, firewalls, VPNs).
• Understanding of system hardening, patching, and ITIL-based operations.

Responsibilities

• Design, implement, and maintain LAN, WAN, WLAN, VPN, and firewall systems.
• Configure and deploy network appliances, routers, switches, and load balancers (e.g. Cisco, Fortinet).
• Conduct vulnerability assessments and support remediation across network layers.
• Troubleshoot network performance issues and ensure minimal downtime.
• Work closely with clients and teams to generate system specs and present architecture solutions.
• Plan, execute, and monitor IT infrastructure setup and upgrades (on-prem and virtualised).
• Manage and maintain Windows, Unix/Linux servers, VMs, and databases (e.g. SQL Server, Oracle).
• Perform routine preventive maintenance and respond promptly to system alerts and issues.
• Support operational systems to meet SLA requirements.
• Participate in change management, disaster recovery, and patch management processes.

Skills

Analytical skills

Troubleshooting

Detail-oriented

Communication

Teamwork

Self-motivated

Education

CCNA certification

CCNP certification (advantage)

Tools

Windows Server

Linux/Unix

VM environments

SQL Server

Oracle

Cisco routers/switches

Firewalls

VPNs

ITIL

Job description

Red Alpha Cybersecurity is seeking a Full Stack Infra Engineer to design, implement, and maintain robust infrastructure across LAN, WAN, and cloud environments. You will work on project work and daily operations of mission-critical systems, with growth opportunities across networking, infrastructure, and cybersecurity.

You will configure and manage Windows/Linux servers, virtual machines, databases, and security devices, while practicing ITIL-based operations and change management to meet SLAs.