Full Stack Infra Engineer

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 hiring Full Stack Infra Engineerwho are eager to design, implement, and maintain robust and secure infrastructure across LAN, WAN, and cloud environments. You’ll be involved in both project-based work and the daily operations of mission-critical systems, with opportunities to grow into advanced roles across networking, infrastructure, and cybersecurity.

What You’ll Be Doing

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, virtual machines, 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

What You Should Know or Be Eager to Learn

Preferred Technical Skills (not mandatory)

CCNA certification is required; CCNP 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

Exposure to security appliances and tools for vulnerability scanning and network monitoring

Mindset We Look For

Problem-solver with strong analytical and troubleshooting skills

Detail-oriented and self-motivated

Strong communication and teamwork abilities

Ability to stay up to date with evolving infrastructure and security technologies

All selected candidates will undergo a 10-week, fully sponsored on-job-training with allowance, before being deployed full-time for 3 years.