Software Development Engineer III

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: This role focuses on designing, developing, and maintaining high-performance modules within F5’s TMOS (Traffic Management Operating System) platform. You will work on core networking and security features, ensuring scalability, reliability, and performance across distributed systems. Primary Responsibilities: Design and implement major components of TMOS-based features and enhancements.

Develop and optimise software for high-performance traffic management and application delivery. Research and integrate new technologies to improve TMOS capabilities. Evaluate and tune performance of existing modules; re-architect where necessary.

Collaborate with cross-functional teams (SRE, QA, Product Management) to deliver roadmap initiatives. Document designs and participate in technical reviews. Uphold F5’s Business Code of Ethics and promptly report violations.

Perform other related duties as assigned. Knowledge, Skills, and Abilities: Strong proficiency in C and C++ programming with hands-on experience in systems-level development. Solid understanding of TMOS architecture , Linux internals, and networking protocols (TCP/IP, HTTP/HTTPS).

Experience with performance tuning, debugging, and troubleshooting in complex environments. Familiarity with Git, build systems, and CI/CD pipelines. Exposure to DPDK, OpenSSL, and multi-threaded programming is a plus.

Ability to manage ambiguity and deliver in a fast-paced environment. Excellent analytical, communication, and collaboration skills. Qualifications: Bachelor’s or Master’s degree in Computer Science, Electrical Engineering, or related field. 5+ years of experience in software development with C/C++ in networking or systems domain.

Prior experience with TMOS or similar traffic management platforms preferred. Knowledge of security concepts and application delivery technologies is desirable. 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.