Sr Principal Software Engineer; L7 Security

Sr Principal Software Engineer (L7 Security)

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Company Mission

At Palo Alto Networks everything starts and ends with our mission:
Being the cybersecurity partner of choice, protecting our digital way of life. Our vision is a world where each day is safer and more secure than the one before. We are a company built on the foundation of challenging and disrupting the way things are done, and we're looking for innovators who are as committed to shaping the future of cybersecurity as we are.

We Believe

We believe collaboration thrives in person. That's why most of our teams work from the office full time, with flexibility when it's needed. This model supports real‑time problem‑solving, stronger relationships, and the kind of precision that drives great outcomes.

Job Description

We're seeking innovators—engineers who design new state‑of‑the‑art products that do not yet exist. These engineers love to code with a drive to build global products and bring new ideas to develop security disciplines to solve real‑world problems. We are looking for leaders who take ownership of their areas of focus and pursue problems at every level. Collaboration is central to our culture, and we need engineers who can communicate at a high level and work well with multi‑functional teams toward a common goal.

As a key member of the Layer-7 Security group, you will be responsible for:

• Designing and developing security features on next‑generation firewalls

• Working with product management on user requirements and applying your knowledge to functional design

• Utilizing your programming skills for efficient and robust implementation

• Interacting with quality assurance and field support teams throughout the entire software development cycle

Impact

• Innovate, design, and develop new security features in our next‑generation firewalls product

• Contribute in all phases of the product development cycle, from definition and design through implementation and test

• Design new product features with a high focus on quality and execution

• Develop functional specifications, assess task requirements and scheduling, and assist in development, debug and support

• Suggest and implement improvements to the development process

• Clearly communicate goals and desired outcomes to internal project teams

• Interview, mentor, and coach new team members

Qualifications

• 10+ years of enterprise product development experience with C in a Unix/Linux environment

• Flair for coding and hands‑on experience debugging the code using tools like GDB is required

• Working knowledge of TCP/IP internals and common data structures and algorithms

• Working knowledge of Windows kernel and Windows Filtering Platform is preferred

• Verbal and written communication skills for working with multi‑functional groups

• Can‑do attitude in a dynamic working environment

• Graduate degree (MS or Ph.D.) in Computer Science or a similar technical discipline is preferred

• Knowledge of multi‑core, multi‑process, and multi‑threaded programming is preferred

• Experience with Windows agent programming and cloud programming (Go) software development is preferred

• Experience with large‑scale and/or high‑performance software design and development is preferred

• Experience with TLS internals, cryptography, and OpenSSL is preferred

• Experience with HTTP and web server backend development is preferred

• B.S./M.S. degree in Computer Science, similar technical discipline or equivalent practical experience or equivalent military experience required

Additional Information

Our engineering team is at the core of our products—directly connected to the mission of preventing cyberattacks. They are constantly innovating, challenging the way we and the industry think about cybersecurity. These engineers build products to solve problems no one has pursued before and define the industry, rather than wait for directions. We need individuals comfortable in ambiguity, excited by challenge, and empowered by the unknown risks that a secure digital environment addresses.

Compensation

The compensation…