Senior Web App Security Engineer — F5 & Cloudflare

UnitedHealth Group; Plymouth (MN); Remote; USD 92,000 - 164,000; Full time

Job summary

UnitedHealth Group's Optum division seeks a Senior Information Security Engineer to strengthen our Security Operations Engineering team. You will design, deploy, and maintain enterprise web security across F5 BIG-IP and Cloudflare, collaborating with development, network, and cloud teams to protect applications and data.

You will leverage automation and AI tools to optimize security workflows, mentor junior engineers, and contribute to disaster recovery planning while adhering to healthcare

Qualifications

• 5+ years of experience in information security engineering, network security, or application traffic management.
• 3+ years of hands-on experience designing, configuring, and managing F5 BIG-IP modules (e.g., LTM, ASM/WAF, APM, or DNS/GTM)
• 2+ years of experience analyzing application layer protocols (HTTP/HTTPS, SSL/TLS, DNS) and web application security vulnerabilities

Responsibilities

• Design, deploy, configure, and maintain F5 BIG-IP architectures (LTM, ASM/WAF, APM, DNS/GTM) and Cloudflare edge security solutions
• Manage and optimize Web Application Firewall (WAF) policies, Cloudflare security rules, and DDoS protection mechanisms to safeguard web applications
• Monitor network traffic, investigate security incidents, and execute technical mitigation for web application threats and access issues
• Leverage enterprise-approved AI tools to streamline workflows, automate repetitive tasks, analyze incident data, and drive continuous operational improvement
• Evaluate emerging security trends, threats, and traffic management technologies to inform solution design and strategic technical innovation
• Collaborate with application development, network, and cloud infrastructure teams to integrate traffic management and security policies into architecture pipelines
• Maintain comprehensive technical documentation, operational runbooks, and disaster recovery procedures for F5 and Cloudflare deployments
• Provide technical guidance, troubleshooting support, and operational mentorship to junior security engineers and cross-functional partners

Skills

Info security eng

F5 BIG-IP

Cloudflare

WAF configuration

CI/CD integration

Education

Bachelor's degree in CS/IT or related

Tools

F5 BIG-IP

Cloudflare

Python

iRules

Job description

UnitedHealth Group's Optum division seeks a Senior Information Security Engineer to strengthen our Security Operations Engineering team. You will design, deploy, and maintain enterprise web security across F5 BIG-IP and Cloudflare, collaborating with development, network, and cloud teams to protect applications and data.

You will leverage automation and AI tools to optimize security workflows, mentor junior engineers, and contribute to disaster recovery planning while adhering to healthcare