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Fortinet · Sunnyvale, CA

# Principal Software Development Engineer

Sunnyvale, CA, United States Senior individual contributor $200,500 - $260,500 Software Engineering 

Listed on Fortinet’s official careers site. Posted August 13, 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/20977)

[OpenNash Jobs](https://jobs.opennash.com/) / [Fortinet](https://jobs.opennash.com/companies/fortinet/) / Principal Software Development Engineer

## Job description

As a Principal Software Engineer, you will:
- Work with developers within the team and on other cross-functional projects, as well as project management to drive, develop, and maintain the product
- Develop and maintain software components on current and future products Hands on in bug fixing current products
- Implement software features of high quality and on schedule
- Integrate, maintain, and improve both 3 rd -Party and proprietary code.
- Design and implement core systems and frameworks, as well new features that build off them
- Communicate effectively, both verbal and written We Are Looking For: Minimum of 10 years of experience in networking related software development B.S. in Computer Science or Electrical Engineering; M.S. highly preferable Strong C/C++ experience in Unix/Linux in environment are essential
- Strong understanding of REST API semantics and their application in networking appliances Experience in using libcurl for formulating REST API calls Experience with JSON data objects and their creation and parsing semantics Experience with multi process/thread programming using Posix and System
- Solid grasp of networking fundamentals, specifically TCP/IP networking, switching and routing
- Solid understanding of principles of network management
- Knowledge of general QA procedures and methodologies as well as software development fundamentals Experience with embedded systems is a plus Experience with networking principles is a plus Experience with firewall configurations and operation is a plus
- Must be authorized to work in the U.S. without sponsorship.

The US base salary range for this full-time position is $200,500 - $260,500. 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.

### 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: Aug 13, 2026
- First seen by OpenNash: Jul 11, 2026
- Last checked: Oct 18, 2026
- Listed for: 99 days
- Location: Sunnyvale, CA, United States
- Pay: $200,500 - $260,500[Apply on Fortinet’s careers site →](https://edel.fa.us2.oraclecloud.com/hcmUI/CandidateExperience/en/sites/CX_2001/job/20977)

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