People Matter

Software Engineer III



Software Engineering
Seattle, WA, USA
Posted on Thursday, June 20, 2024

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.

Position Summary

The Drivers team at F5 is looking for an enthusiastic software engineer who is well versed with designing, developing, and testing network drivers for a scalable, distributed, and carrier grade software solution. This team owns the low-level network drivers for high performance packet processing in the BIG-IP’s data-plane. BIG-IP is F5’s flagship Application Delivery Controller. The data-plane could be inside a full-fledged virtual machine running on a hypervisor or as a group of pods running in a Kubernetes environment. The network drivers are used for a variety of synthetic NICs (like vmxnet3, virtio etc.), Intel and Mellanox SRIOV Virtual function NICs and F5’s proprietary NICs developed in-house.

Primary Responsibilities

  • Design and implement network drivers and test automation for them.
  • Research, investigate and define new areas of technology to enhance existing products or new product directions.
  • Evaluate performance of products; tune, re-evaluate the design and implementation of current source code.
  • Document software designs via functional specifications and other design documents.
  • Conduct presentations internal and external.
  • May participate in hiring and onboarding process.
  • Collaborate with team members and technical leads.
  • Responsible for upholding F5’s Business Code of Ethics and for promptly reporting violations of the Code or other company policies.
  • Performs other related duties as assigned.

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.

Knowledge, Skills, and Abilities

  • Strong C development background along with Linux user mode driver development.
  • Must have experience and knowledge of Linux networking including networking protocols, architecture, and technologies (ICMP, HTTP, TCP/IP etc.)
  • Well versed with GitLab and/or similar repository solutions.
  • 3+ years programming experience preferably in a software language that supports F5 product line.
  • Working knowledge of containerization and Kubernetes.
  • Working knowledge of microservices architecture.
  • CI/CD pipeline and test development using python/bash.
  • Agile based software development methodologies.
  • Excellent analytic / troubleshooting and debugging skills.
  • Successfully manage ambiguity in work.
  • Demonstrated excellence in written and verbal communications.
  • Able to collaborate and thrive in a fast-paced high-performance environment.
  • Demonstrates emerging leadership qualities. Serves as de facto lead in small group interaction.
  • Can design and implement new functionality in multiple feature areas, while developing subject matter expertise in at least one.
  • Duties require the ability to utilize a computer, communicate over the telephone, and read printed material.


Typically requires a minimum of 5 years of related experience with a bachelor’s degree; or 3 years and a master’s degree; or a PhD without experience; or equivalent work experience.


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.

The annual U.S. base pay range for this position is: $128,099.00 - $192,149.00

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: F5 reserves the right to change or terminate any benefit plan without notice.

Please note that F5 only contacts candidates through F5 email address (ending with or auto email notification from Workday (ending with or

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