Our MissionAt Palo Alto Networks®, we’re united by a shared mission—to protect our digital way of life. We thrive at the intersection of innovation and impact, solving real-world problems with cutting-edge technology and bold thinking. Here, everyone has a voice, and every idea counts. If you’re ready to do the most meaningful work of your career alongside people who are just as passionate as you are, you’re in the right place.Who We AreIn order to be the cybersecurity partner of choice, we must trailblaze the path and shape the future of our industry. This is something our employees work at each day and is defined by our values: Disruption, Collaboration, Execution, Integrity, and Inclusion. We weave AI into the fabric of everything we do and use it to augment the impact every individual can have. If you are passionate about solving real-world problems and ideating beside the best and the brightest, we invite you to join us!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 SummaryWe are looking for an experienced and highly capable Principal/Senior Software Engineer to join the Koi team. This role is focused on building and scaling a complex, high-impact product that operates across large-scale enterprise environments. As a Principal Engineer, you will take ownership of major parts of the system and work across the full stack, including backend services, data pipelines, frontend applications, and endpoint/agent code. You will play a key role in shaping the architecture of Koi as it grows, ensuring the system remains scalable, reliable, and easy to evolve.Key ResponsibilitiesDesign and build scalable, high-performance systems across the full Koi stackOwn architecture and technical direction for critical componentsWork across backend, data, frontend, and agent codeTackle complex challenges related to scale, reliability, and performanceDrive best practices in system design, testing, and observabilityCollaborate closely with product, security, and customer-facing teamsIdentify and resolve bottlenecks and architectural limitationsMentor other engineers and raise the overall technical bar of the teamQualifications Required QualificationsExtensive experience building and scaling distributed systemsStrong backend engineering skills, with ability to work across the full stackExperience with data-intensive systems and pipelinesAbility to design systems that operate reliably at scaleStrong problem-solving skills and ownership mindsetExperience mentoring engineers and leading technical initiativesPreferred QualificationsExperience with public cloud platforms (AWS, GCP, Azure)Familiarity with containerization and orchestration technologies (e.g., Docker, Kubernetes)Proficiency in languages such as Go, Python, or JavaExperience with modern frontend frameworks like React or Vue.jsOur Commitment We’re trailblazers that dream big, take risks, and challenge cybersecurity’s status quo. It’s simple: we can’t accomplish our mission without diverse teams innovating, together.We are committed to providing reasonable accommodations for all qualified individuals with a disability. If you require assistance or accommodation due to a disability or special need, please contact us at accommodations@paloaltonetworks.com.Palo Alto Networks is an equal opportunity employer. We celebrate diversity in our workplace, and all qualified applicants will receive consideration for employment without regard to age, ancestry, color, family or medical care leave, gender identity or expression, genetic information, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran status, race, religion, sex (including pregnancy), sexual orientation, or other legally protected characteristics.All your information will be kept confidential according to EEO guidelines.Is role eligible for Immigration Sponsorship? No. Please note that we will not sponsor applicants for work visas for this position.