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.

We are looking for a Software Development Engineer III to build and evolve the core data‑plane and control‑plane capabilities of BIG‑IP TMOS and BIG‑IP Next for Kubernetes(BNK) Firewall platforms. This role is for an experienced systems engineer who thrives in high‑scale, high‑performance networking and security software, and who can take features from architecture to production with a strong sense of ownership.

In this role, you will work on mission‑critical firewall, traffic management, and L4–L7 networking components, contributing to both classic TMOS and cloud‑native BIG‑IP Next (Kubernetes‑based) architectures.

Primary Responsibilities:

Design, develop, and maintain test automation frameworks and test suites for Firewall and IPS features in a cloud-native, Kubernetes-based environment
Define and implement test strategies, test plans, and test cases for Firewall/IPS functionality including functional, regression, performance, and security testing
Build and maintain CI/CD test pipelines ensuring continuous quality validation
Investigate, reproduce, and root-cause reported issues related to Firewall and IPS components
Set up and maintain complex test environments using Kubernetes, Docker, and network simulation tools
Mentor junior test engineers and drive testing best practices across the team
Collaborate with development engineers to improve testability and quality of Firewall/IPS features
Recommend and maintain test methodologies, processes, and standards

Required Skills:

Strong coding skills in Python or Go for test automation
Background in networking technologies & protocols.
Experience with Linux, network security tools, and packet analysis
Good understanding of Firewalls, and Intrusion Prevention/Detection System (IPS/IDS)
Experience with Kubernetes, Docker, and software networking
Strong experience with test automation frameworks and CI/CD pipelines (pytest, GitLab CI, or similar)
Experience with traffic generation and network testing tools
Able to collaborate and thrive in a fast-paced, high-performance environment
8+ years of software test engineering experience in networking or security domain

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 [HIDDEN TEXT].

Software Development Engineer III Firewall