Principal Security Engineer Jobs in California

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Senior Network Security Engineer

Centene Corporation

•

Missouri, USA

Full-time

You could be the one who changes everything for our 28 million members by using technology to improve health outcomes around the world. As a diversified, national organization, Centene's technology professionals have access to competitive benefits including a fresh perspective on workplace flexibility. Position Purpose: A Senior Network Security Engineer is expected to be knowledgeable in all aspects of firewall deployment, configuring, and management. This expertise includes policies, and thr
Posted 16 days ago | Updated 4 hours ago

Application Security Engineer/ Hybrid in Atlanta & Dallas 2-3 days/ 6 Month Contract to Hire

Motion Recruitment Partners, LLC

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Los Angeles, California, USA

Full-time

A global tech-driven organization in hiring a hybrid Application Security Engineer on a 6-month contract-to-hire basis. This role is based in Dallas or Atlanta and offers a flexible hybrid setup. You'll help secure modern cloud applications running across AWS, Azure, or Google Cloud Platform. This is a hands-on opportunity to shape security in a fast-moving product environment. You'll lead threat modeling, code reviews, and guide secure development across global teams. Ideal for someone with a s
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Posted 43 days ago | Updated moments ago

Data Engineer Intern (TikTok-Privacy and Security-Data Infra) - 2026 Summer(BS/MS)

TikTok

•

San Jose, California, USA

Full-time

Location : San Jose Employment Type : Intern Job Code : A02944 Apply to this job Share this listing: Responsibilities The Data Infra, Privacy & Security team is missioned to ensure the safety of company-level big data products and compliance with local principals and regulations. We are adding privacy features to TikTok tech stack, and building world-class data security & privacy framework on top big data technology. It's an emerging area where many companies and industry are heavily inve
Posted 1 day ago | Updated 4 hours ago

Sr. Security BI Engineer

Veear

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Oakland, California, USA

Contract

The Senior analyst will provide support to advance security risk reduction across the Enterprise. This position will work closely with internal leaders and subject matter experts while interacting with other stakeholders across the Company to build visuals, dashboards and other products to support security program Conducts analysis on variances, forecasts and risk reduction trends. Monitors and reports on operational, productivity and efficiency metrics and scorecards. Works closely with our
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Posted 42 days ago | Updated 9 hours ago

Senior Offensive Security Engineer (Embedded Devices)

Aduril Industries

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Costa Mesa, California, USA

Full-time

Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century's most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril's family of systems is powered by Lattice OS, an AI-powered operating system that turns thousands of data streams into a realtime, 3D command and c
Posted 19 days ago | Updated 4 hours ago

Sr Staff Software Engineer (NGFW System Infrastructure and Platform Security)

PaloAlto Networks

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Santa Clara, California, USA

Full-time

Company Description Our 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. Who We Are We take our mission of
Posted 25 days ago | Updated 4 hours ago

Security Access Control Engineer

Allied Universal

•

Livermore, California, USA

Full-time

Overview Join Allied Universal Technology Services, a global leader in transforming the security industry. We integrate advanced technology - video surveillance, electronic access control, alarm monitoring and augmented solutions with physical security to help people feel safe. Whether you're an installation technician, service technician, engineer, or project manager, you'll discover rewarding opportunities to grow your career as part of a valued team. Apply today and be phenomenal-build a me
Posted 11 days ago | Updated 4 hours ago

Software Development Engineer in Test Intern (TikTok-Privacy and Security-Business Risk Integrated Control)- 2026 Summer (BS/MS)

TikTok

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San Jose, California, USA

Full-time

Location : San Jose Employment Type : Intern Job Code : A156302 Apply to this job Share this listing: Responsibilities The TikTok Privacy team focuses on delivering testing framework, testing and debug tools, privacy governance platform, to ensure high quality and stability of privacy projects and privacy product. We look forward to your joining. Our mission is to protect personal data and privacy for billions of users on TikTok platform, let users explore, create and connect with each ot
Posted 2 days ago | Updated 4 hours ago

Sr. Network Security Engineer

McKesson Corporation

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Remote or Irving, Texas, USA

Full-time

McKesson is an impact-driven, Fortune 10 company that touches virtually every aspect of healthcare. We are known for delivering insights, products, and services that make quality care more accessible and affordable. Here, we focus on the health, happiness, and well-being of you and those we serve - we care. What you do at McKesson matters. We foster a culture where you can grow, make an impact, and are empowered to bring new ideas. Together, we thrive as we shape the future of health for patien
Posted 45 days ago | Updated 4 hours ago

Senior Network Security Engineer - TOP SECRET Clearance w/SCI Eligibility Required

American Systems Corporation

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Ridgecrest, California, USA

Full-time

Overview AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of Information Technology, Test & Evaluation, Program Mission Support, Engineering & Analysis, and Training. U.S. Citizenship Required for the purposes of obtaining/holding a U.S. security clearance Responsibilities AMERICAN SYSTEMS is seeking a Senior Network Security Engineer with 5-7 years of hands-on experience to support secure in
Posted 24 days ago | Updated 4 hours ago

Senior Security Engineer

Request Technology, LLC

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Remote

Full-time

Senior Security Engineer Salary: Open + Bonus + Stock Options Location: Remote *We are unable to provide sponsorship for this role* Qualifications Product security or endpoint-focused consulting, with hands-on testing of Windows-based agents or EDR/AV productsExperience building fuzzers or integrating existing fuzzing frameworks for native codeExperience and capability in building automated test harnesses from the ground upStrong Windows OS internals knowledge, especially user-mode hooking and W
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Posted 60+ days ago | Updated 1 day ago

Mobile Security Engineer Intern (TikTok-Business Risk Integrated Control-Anti Automation Solutions) - 2026 Summer (BS/MS)

TikTok

•

San Jose, California, USA

Full-time

Location : San Jose Employment Type : Intern Job Code : A34996 Apply to this job Share this listing: Responsibilities Anti-Automation Solutions (AA) is part of Business Integrated Risk Control team. Automated fraud refers to technical methods used by hackers to perform API abuse at scale using scripts and tools. Our vision is to establish an industry-leading team with a focus on end-to-end defense-in-depth systems with privacy and business needs in mind. We are responsible for continuousl
Posted 4 days ago | Updated 4 hours ago

Cyber Systems Security Engineer Staff - Skunk Works - Level 4

Lockheed Martin Corporation

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Palmdale, California, USA

Full-time

Job Description The Cyber Systems Security Engineer Staff will be responsible for leading a team of fellow engineers in the designing, assembly, integration, and maintenance of System Integration Lab (SIL), particularly focusing on network planning, hardware installation, software integration support, verification, and validation of system functionality. In addition to designing and building the SIL the applicant will be responsible for ensuring the SIL is NIST/RMF/JSIG compliant and assist in
Posted 17 days ago | Updated 4 hours ago

Security Solutions Engineer ll

Allied Universal

•

Santa Ana, California, USA

Full-time

Overview Join Allied Universal Technology Services, a global leader in transforming the security industry. We integrate advanced technology - video surveillance, electronic access control, alarm monitoring and augmented solutions with physical security to help people feel safe. Whether you're an installation technician, service technician, engineer, or project manager, you'll discover rewarding opportunities to grow your career as part of a valued team. Apply today and be phenomenal-build a me
Posted 1 day ago | Updated 4 hours ago

Senior Software Engineer- Security and Vulnerability Management

Visa Inc.

•

Foster City, California, USA

Full-time

Company Description Visa is a world leader in payments and technology, with over 259 billion payments transactions flowing safely between consumers, merchants, financial institutions, and government entities in more than 200 countries and territories each year. Our mission is to connect the world through the most innovative, convenient, reliable, and secure payments network, enabling individuals, businesses, and economies to thrive while driven by a common purpose - to uplift everyone, everywhe
Posted 3 days ago | Updated 4 hours ago

Senior Software Engineer, Security Products

DigitalOcean

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San Francisco, California, USA

Full-time

Dive in and do the best work of your career at DigitalOcean. Journey alongside a strong community of top talent who are relentless in their drive to build the simplest scalable cloud. If you have a growth mindset, naturally like to think big and bold, and are energized by the fast-paced environment of a true industry disruptor, you'll find your place here. We value winning together-while learning, having fun, and making a profound difference for the dreamers and builders in the world. We are see
Posted 30 days ago | Updated 4 hours ago

Senior Staff Engineer, Backend - Cortex Cloud (Posture Security)

PaloAlto Networks

•

Santa Clara, California, USA

Full-time

Company Description Our 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. Who We Are We take our mission of
Posted 10 days ago | Updated 4 hours ago

Senior Network Security Engineer - DGX Cloud

NVIDIA Corporation

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Remote or Santa Clara, California, USA

Full-time

NVIDIA is looking for a Sr Network Security Engineer who will design and implement security best practices for on-premise and cloud access, keeping in mind boundaries that securely enable NVIDIA business verticals such as Graphics Drivers to Autonomous Vehicles and Artificial Intelligence to Deep Learning frameworks for internal and external consumption. This includes the use of deploying and maintaining various aspects of infrastructure security including, but not limited to, stateful firewalls
Posted 4 days ago | Updated 4 hours ago

Security Software Engineer (Starshield)

SpaceX

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Hawthorne, California, USA

Full-time

SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today SpaceX is actively developing the technologies to make this possible, with the ultimate goal of enabling human life on Mars. SECURITY SOFTWARE ENGINEER (STARSHIELD) Starshield leverages SpaceX's Starlink technology and launch capability to support national security efforts. While Starlink is designed for consumer and commercial use, Starshi
Posted 38 days ago | Updated 4 hours ago

Senior SOC Security Engineer

Calendly

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Remote

Full-time

About the team & opportunity What's so great about working on Calendly's Security team? We make things possible for our customers through innovation. Calendly is seeking a Senior Security Engineer who will bring curiosity, technical knowledge and desire to up-level people around you. You will report to the Head of Security Operations and will be responsible for many of the key functions around security operations including incident response, enterprise level security and enhancing threat detect
Posted 21 days ago | Updated 4 hours ago