Sr Security Engineer

F5, Inc.; Ireland; On-site; EUR 90,000 - 150,000; Full time

Job summary

F5 is seeking a Senior Security Engineer to help protect our enterprise and product environments. You will develop and implement strategic security processes and build technical solutions to improve our security posture in a rapidly evolving cloud and on‑premises landscape.

You will collaborate with Architecture, SRE and Operations, leverage Azure, AWS and GCP, conduct risk assessments and threat modeling, and implement zero‑trust, IAM patterns and new controls across platforms.

Qualifications

• Experience in high-availability enterprise production environments.
• Ability to script in multiple languages and automate security processes.
• Baseline competency with Azure/AWS/GCP or equivalent cloud platforms.
• Strong knowledge of security architecture, networking, and threat prevention.
• Experience automating security testing and reporting outputs.
• Familiarity with security tools and DevOps practices.

Responsibilities

• Identify risks to confidentiality, integrity, and availability and mitigate them.
• Leverage cloud services to automate security controls.
• Develop or implement security tools for threat detection and analysis.
• Perform security assessments on enterprise systems and services.
• Review changes for security and compliance impacts.
• Lead security testing and penetration testing initiatives.
• Advise on security design principles to stakeholders.
• Collaborate with Architecture, SRE and Operations teams.

Skills

Scripting in Go

Scripting in Python

Scripting in Rust

Cloud security

Threat modeling

Network security

Education

B.S./M.S. in CS/Engineering or related field

Tools

Azure

AWS

GCP

Kubernetes

Docker

HashiCorp Vault

Palo Alto

Cisco

Qualys

Linux

Job description

At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.

Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

Sr. Security Engineer

Join a team using leading edge security technology and processes to protect the F5 enterprise and product environments. The Sr. Security Engineer position will develop and implement strategic processes and build technical solutions to enable our information security program and continuously improve our security posture amidst the industry's evolving technology landscape.

Primary Responsibilities

• Identify organizational risks to confidentiality, integrity, and availability, and determine appropriate mitigations.
• Leverage native Azure, GCP, and AWS cloud services to automate and improve existing security and control activities.
• Develop or implement open‑source/third‑party tools to assist in detection, prevention and analysis of security threats.
• Perform technical security assessments against F5aaS product and enterprise cloud hosted, virtual, and on‑premise systems including static and dynamic analysis, and threat modeling.
• Review and test changes to services, applications, and networks for potential security impacts.
• Manage penetration and segmentation testing of F5 applications and networks.
• Review changes to and ongoing operations of enterprise environments and supporting systems for security and compliance impacts.
• Assist in detection and response efforts as a product line subject matter expert.
• Propose new controls to Security Architecture and GRC.
• Build and implement new security controls, processes and tools.
• Implement zero‑trust and IAM security patterns with cloud agnostic tooling.
• Collaborate with Architecture, Site Reliability Engineering and Operations teams to develop and implement technical solutions and security standards.
• Configure industry standard security testing/scanning tools (network scanning, code scanning, posture management).
• Advise enterprise stakeholders on security best practices and secure design principles.
• Implement, design, develop, administer, and manage enterprise security tooling.

Knowledge, Skills and Abilities

• Experience working with high‑availability enterprise production environments.
• Ability to script in multiple languages (Go, Rust, Python, Ruby, etc.) and experience building scripts for process improvements and automation.
• Baseline competency in administration of Microsoft Azure Cloud, Amazon Web Services (AWS), Google Cloud Platform (GCP) or equivalent public cloud infrastructure.
• Technical knowledge and extensive hands‑on experience with security and networking architecture, networking protocols, network security design, wireless security, intrusion prevention/detection, and firewall architecture.
• Experience automating security testing and reporting outputs.
• Knowledge or familiarity with technological stack (Big-IP, Azure, AWS, GCP, CentOS, Linux, Kubernetes, Docker, Hashicorp Vault, Palo Alto, Cisco, Qualys).
• Experience assessing and implementing technical security controls.
• Exposure to DevOps tooling, CI/CD pipelines, container orchestration, and infrastructure as code approach (e.g. Puppet, Chef, Ansible, Terraform, Jenkins, CircleCI, Artifactory, Git).
• Strong written and verbal communication skills.
• Experience with network and application vulnerability and penetration testing tools.
• Willingness to innovate and learn new technologies.
• Excellent interpersonal and relationship skills with a collaborative mindset.
• Strong self‑directed work habits, exhibiting initiative, drive, creativity, maturity, self‑assurance and professionalism.
• Agile, tactful, and proactive attitude that can manage prioritization and know when to escalate.

Qualifications

• B.S. or M.S. in Computer Science, Engineering, or related field, or equivalent experience.
• 5 years of progressive responsibility in a security organization.
• 2–6 years of relevant security engineering or network security experience.

The base pay range per annum for this position is: F5 maintains broad salary ranges for its roles in order to account for variations in knowledge, skills, experience, geographic locations, and market conditions, as well as to reflect F5's differing products, industries, and lines of business. The pay range referenced is as of the time of the job posting and is subject to change. You may also be offered incentive compensation, bonus, restricted stock units, and benefits. More details about F5's benefits can be found at the following link: https://www.f5.com/company/careers/benefits. F5 reserves the right to change or terminate any benefit plan without notice.

The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all‑inclusive, and responsibilities and requirements are subject to change.

Please note that F5 only contacts candidates through F5 email address (ending with @f5.com) or auto email notification from Workday (ending with f5.com or @myworkday.com).

Equal Employment Opportunity

It is the policy of F5 to provide equal employment opportunities to all employees and employment applicants without regard to unlawful considerations of race, religion, color, national origin, sex, sexual orientation, gender identity or expression, age, sensory, physical, or mental disability, marital status, veteran or military status, genetic information, or any other classification protected by applicable local, state, or federal laws. This policy applies to all aspects of employment, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination. F5 offers a variety of reasonable accommodations for candidates. Requesting an accommodation is completely voluntary. F5 will assess the need for accommodations in the application process separately from those that may be needed to perform the job. Request by contacting [e-mail].