[Skip to main content](#main-content) [OpenNash Jobs](https://jobs.opennash.com/) [Hiring report](/reports/hiring/) · [All Fortinet jobs](https://jobs.opennash.com/companies/fortinet/) · [Search jobs](/search/) Fortinet · Sunnyvale, CA # Principal Software Developer Engineer Sunnyvale, CA, United States Senior individual contributor $170,000 - $210,000 Software Engineering Listed on Fortinet’s official careers site. Posted May 11, 2026. Check that it is still open and apply there. [Apply on Fortinet’s careers site →](https://edel.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_2001/job/22846) [OpenNash Jobs](https://jobs.opennash.com/) / [Fortinet](https://jobs.opennash.com/companies/fortinet/) / Principal Software Developer Engineer ## Job description Join Fortinet, a cybersecurity pioneer with over two decades of excellence, as we continue to shape the future of cybersecurity and redefine the intersection of networking and security. At Fortinet, our mission is to safeguard people, devices, and data everywhere. We are currently seeking a Principal Software Developer Engineer for our FortiSwitch team. As a Principal Software Developer Engineer, you will: Develop and maintain software components on current and future products Take responsibility for developing networking-related features for the FortiSwitch Virtual Machine (FSW-VM) product line and the Marvell CPSS SDK work for both VM and hardware. Be hands on in bug fixing in current products Implement software features of high quality and on schedule Communicate effectively, both verbally and in writing. Work closely with hardware teams for features which directly translate to hardware platforms We Are Looking For: A minimum of 12 years of experience in Networking related software development B.S. in Computer Science or Electrical Engineering; M.S. preferred Strong C/C++ experience in Unix/Linux environment is essential Strong knowledge of Linux kernel programming, including system calls and custom device drivers Experience with Marvell switching ASICs and SDKs in Ethernet switches/routers. Experience in developing applications running in a Virtualization environment (KVM & VMware) Experience with multi process/thread programming environment Experience in implementing L2/L3 features such as STP, RSTP, RIP, OSPF, IS-IS, BGP, LACP, LLDP, QOS, Private VLAN, LAG Knowledge of TCP/IP networking, firewalls, switching and routing Familiarity with system installations, configurations, and troubleshooting. - Knowledge of general QA procedures and methodologies as well as software development fundamentals - Knowledge of scripting languages: Shell and Python a plus Experience with firewalls and embedded systems is a plus - Knowledge of Linux kernel and driver development is plus - Must be authorized to work in the U.S. without sponsorship. The US base salary range for this full-time position is $170,000 - $210,000. Fortinet offers employees a variety of benefits, including medical, dental, vision, life and disability insurance, 401(k), 11 paid holidays, vacation time, and sick time as well as a comprehensive leave program. Wage ranges are based on various factors including the labor market, job type, and job level. Exact salary offers will be determined by factors such as the candidate's subject knowledge, skill level, qualifications, experience, and geographic location. All roles are eligible to participate in the Fortinet equity program, Bonus eligibility is reviewed at time of hire and annually at the Company’s discretion. ### About Our Team Join our team, known for its collaborative ethos, working seamlessly with global customers, internal engineering teams and product development groups. Our team culture emphasizes continuous learning, innovation, and a strong commitment to customer satisfaction. We embrace Fortinet’s core values of openness, teamwork and innovation, fostering an environment where team members support each other, share knowledge. Our inclusive and dynamic team thrives on collaboration and is driven by the shared goal of maintaining Fortinet’s high standards of excellence in cybersecurity solutions Why Join Us: We encourage candidates from all backgrounds and identities to apply. We offer a supportive work environment and a competitive Total Rewards package to support you with your overall health and financial well-being. Embark on a challenging, enjoyable, and rewarding career journey with Fortinet. Join us in bringing solutions that make a meaningful and lasting impact to our 660,000+ customers around the globe ## At a glance - Posted by the employer: May 11, 2026 - First seen by OpenNash: Jul 11, 2026 - Last checked: Oct 18, 2026 - Listed for: 160 days - Location: Sunnyvale, CA, United States - Pay: $170,000 - $210,000[Apply on Fortinet’s careers site →](https://edel.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_2001/job/22846) ## More jobs at Fortinet ### [Cloud Security Developer](https://jobs.opennash.com/companies/fortinet/jobs/74bedf36f21ae7317376/) Sunnyvale, CA, United States ### [DevOps Engineer (FortiAppSec)](https://jobs.opennash.com/companies/fortinet/jobs/12aef0d257ab0e42a6c7/) Sunnyvale, CA, United States ### [Embedded Software Engineer](https://jobs.opennash.com/companies/fortinet/jobs/034fded9fef9fef44e38/) Sunnyvale, CA, United States ### [Principal Embedded Software Developer](https://jobs.opennash.com/companies/fortinet/jobs/93494b6997cf95522c75/) Sunnyvale, CA, United States ## Similar jobs at other companies ### [Software Developer/Software Engineer in Test](https://jobs.opennash.com/companies/general-dynamics/jobs/229bce1af89aceaed99c/) General Dynamics · Falls Church, VA, US ### [Senior Principal Software Developer (AI Cybersecurity)](https://jobs.opennash.com/companies/huntington-bank/jobs/8982c903611d8db0216b/) Huntington Bank · Atlanta, GA Hoover, AL Columbus, OH Houston, TX Detroit, MI Dallas, TX Tupelo, MS ### [Software Engineer III, Developer Platform](https://jobs.opennash.com/companies/alphabet/jobs/ded629da95ac6831954b/) Alphabet · Raleigh, North Carolina ### [Software Developer Engineer II](https://jobs.opennash.com/companies/optimum/jobs/c7dd6814569ed2e26fae/) Optimum · Bethpage, NY, US ### [Lead Software Engineer - Quant Developer](https://jobs.opennash.com/companies/jpmorganchase/jobs/57170755199d60885e05/) JPMorganChase · Jersey City, NJ, United States OpenNash lists jobs from employers’ own careers sites and does not handle applications. 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