Principal Security Software Engineer - Applied Computing at SpaceX | Palo Alto, CA

Space Exploration Technologies Corp.Palo Alto, CA

On-site Full-time

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Experience Level

Mid to Senior

Qualifications

Applicants should possess a strong background in software engineering, with extensive experience in security protocols and best practices. A Bachelor’s degree in Computer Science or a related field is required, along with a minimum of 5 years of experience in security software development. Familiarity with threat modeling, vulnerability assessments, and secure coding techniques is essential.

About the job

Join SpaceX as a Principal Security Software Engineer within our Applied Computing team, where you will play a crucial role in enhancing the security posture of our software systems. Your expertise will contribute to the development and implementation of cutting-edge security measures ensuring the integrity and safety of our technology innovations.

About Space Exploration Technologies Corp.

Space Exploration Technologies Corp. (SpaceX) is a pioneering aerospace manufacturer and space transport services company dedicated to reducing space transportation costs and enabling the colonization of Mars. Join us in our mission to revolutionize space technology.

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Principal Enterprise Security Engineer

Obsidian Security

Full-time|$260K/yr - $300K/yr|On-site|Palo Alto, CA

Founded in 2017, Obsidian Security is dedicated to addressing a vital need in the digital landscape: safeguarding SaaS applications where modern enterprises operate—such as Microsoft 365, Salesforce, and many others. With the backing of esteemed investors like Greylock, Norwest Venture Partners, and IVP, we have established a comprehensive SaaS security plat…

Mar 11, 2026

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Enterprise Security Engineer - FedRAMP

Rubrik, Inc.

Full-time|On-site|Palo Alto, CA

Join Rubrik as an Enterprise Security Engineer specializing in FedRAMP. In this pivotal role, you will be responsible for ensuring the security of our cloud solutions in compliance with the Federal Risk and Authorization Management Program (FedRAMP). You will work closely with cross-functional teams to implement security practices, monitor security risks, and enhance our security posture.

Apr 30, 2026

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Lead Principal Enterprise IT Engineer

Full-time|$180K/yr - $235K/yr|On-site|Palo Alto, California, United States

Lead Principal Enterprise IT Engineer, IT & SecurityPalo Alto, CA (On-site)About 1XAt 1X, we are at the forefront of technological innovation, developing humanoid robots that collaborate with humans to address labor shortages and foster a prosperous future for all.The RoleWe are seeking a highly skilled Lead Principal Enterprise IT Engineer to spearhead the strategy, architecture, and implementation of essential IT systems as we continue to expand. This pivotal role encompasses technical leadership, oversight of security and compliance measures, and mentorship to ensure IT operations align seamlessly with our company's growth trajectory.Your ResponsibilitiesEstablish and advance enterprise IT strategy, architecture, and roadmaps across identity, collaboration, and device platforms.Oversee the administration and scaling of Google Workspace, Okta, Intune, and MDM platforms, emphasizing Zero Trust security principles.Create and implement automation frameworks and scripting (Bash, Python, PowerShell) to enhance the efficiency of IT operations.Ensure IT systems comply with standards such as SOC2 and ISO 27001 while proactively addressing enterprise risks.Facilitate the integration of IT systems with engineering, manufacturing, and robotics environments.Serve as a senior escalation point for IT operations, providing mentorship to IT engineers and fostering a high-performance team culture.Engage with executive and cross-functional stakeholders to ensure that IT strategies support overarching business growth objectives.

Oct 2, 2025

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Principal Product Security Engineer

Obsidian Security

Full-time|$260K/yr - $300K/yr|On-site|Palo Alto, CA

Obsidian Security seeks a Principal Product Security Engineer to lead and expand its product security program. This senior role centers on securing SaaS products, cloud infrastructure, CI/CD pipelines, and related services. The position requires strong technical expertise, sound judgment, and the ability to guide teams across the organization. Key responsibilities Lead and develop the product security program for Obsidian’s SaaS offerings and infrastructure Collaborate with Engineering, Product, GRC, IT, DevOps, SRE, and Platform teams to integrate security throughout the software development lifecycle Advance security practices for cloud and infrastructure Promote secure design principles and conduct threat modeling Champion automation in detection, response, vulnerability management, and security testing Reporting structure This position reports directly to the Head of Security. Who will succeed The role is well suited to an experienced product security leader comfortable in a growing cybersecurity startup, eager to make a real impact on the security of products, customers, and the wider organization. Location This role is based in Palo Alto, CA.

Apr 28, 2026

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Lead Security Engineer (AI) – Product Security

Nubank

Full-time|On-site|USA, Durham; USA, Miami; USA, Palo Alto; USA, Washington DC

As a Lead Security Engineer specializing in AI and Product Security at Nubank, you will play a pivotal role in safeguarding our innovative financial solutions. Your expertise will help us develop and implement robust security measures that protect sensitive data and maintain the trust of our users. You will lead a dynamic team, driving security initiatives and collaborating closely with various departments to integrate security protocols into our product development lifecycle.

Apr 6, 2026

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Principal Engineer, Online Systems

Pinterest, Inc.

Full-time|On-site|San Francisco, CA, US; Palo Alto, CA, US

Role overview Pinterest is seeking a Principal Engineer to join the Online Systems team, based in either San Francisco or Palo Alto. This position centers on designing and building scalable systems that serve millions of users. The focus is on enhancing user engagement and optimizing the performance of Pinterest's online platforms. What you will do Architect and develop large-scale applications built for high-traffic environments Collaborate with engineering, product, and design teams to deliver reliable solutions Lead technical decisions that influence the direction of Pinterest's online systems

Apr 27, 2026

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Application Security Engineer

xAI

Full-time|$200K/yr - $340K/yr|On-site|Palo Alto, CA; San Francisco, CA

Join our innovative team at xAI as an Application Security Engineer, where you will play a vital role in safeguarding our cloud-native applications throughout the software development lifecycle. You will focus on ensuring the security of code, CI/CD pipelines, and the integration of emerging AI technologies. As part of a small, driven group, your contributions will directly impact our mission to create AI systems that enhance humanity's quest for knowledge.

Feb 6, 2026

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Principal Digital Design Engineer

PsiQuantum

Full-time|$219K/yr - $265K/yr|On-site|Palo Alto, California, United States

At PsiQuantum, we are on a groundbreaking mission to create the first practical quantum computers—devices capable of unlocking the monumental advances that the field has long envisioned. Established in 2016, our exclusive commitment is to design and implement million-qubit, fault-tolerant quantum systems.Quantum computers leverage the principles of quantum mechanics to tackle challenges that even the most powerful supercomputers or AI technologies cannot address. Their potential applications span across critical sectors such as energy, pharmaceuticals, finance, agriculture, transportation, materials science, and many more.Our innovative architecture is rooted in silicon photonics. By capitalizing on the sophisticated semiconductor manufacturing processes—collaborating with partners like GlobalFoundries—we are able to utilize the same high-volume techniques that produce billions of chips for telecommunications and consumer electronics. Photonics presents inherent advantages for scalability: photons are unaffected by heat, resistant to electromagnetic interference, and seamlessly integrate with existing cryogenic cooling and standard fiber-optic systems.In 2024, PsiQuantum announced government-supported initiatives aimed at constructing our inaugural utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These projects signify a growing acknowledgment that quantum computing is poised to be strategically and economically transformative—and that the time to scale is now.Additionally, PsiQuantum is dedicated to developing the algorithms and software essential for maximizing the commercial viability of these systems. Our application, software, and industry teams collaborate directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for tangible world applications.Quantum computing signifies not a mere extension of classical computing, but a radical transformation—a pathway to overcoming obstacles that cannot be resolved through any other means. The possibilities are vast, and we possess a clear strategy to actualize them.We invite you to join our journey.

Mar 4, 2026

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Application Security Engineer

Palantir Technologies

Full-time|On-site|Palo Alto, CA

Join a Transformative CompanyAt Palantir, we develop cutting-edge software that empowers organizations to make data-driven decisions and optimize their operations. Our platforms enable partners to tackle critical challenges—from developing life-saving pharmaceuticals to predicting supply chain disruptions and locating missing individuals.About the RoleAs a key member of our Application Security Team, you will play an instrumental role in safeguarding vital information and ensuring the security of our software products. We are committed to enabling our developers to be agile and produce secure applications, especially given the high-stakes nature of our work in defense, intelligence, and commercial applications.Your responsibilities will include:• Product Security Assessments. Conduct comprehensive security evaluations of our product and service portfolio, utilizing whitebox, greybox, and blackbox testing methodologies. Collaborate with offensive security teams and engineering departments to fortify our offerings against sophisticated threats.• Architectural Security Expertise. Serve as the primary security advisor for product architects and engineers. Engage in threat modeling, risk assessments, and the implementation of security controls to mitigate identified vulnerabilities, ensuring our designs adhere to a secure-by-default approach.• Strategic Security Leadership. Take ownership of transformative security initiatives that influence the entire organization. Your contributions may include implementing software supply chain security measures, establishing hardware-backed GPG key signing protocols, and driving security automation efforts.• Vulnerability Discovery and Remediation. Innovate methods for identifying and addressing security weaknesses in our products. Utilize static and dynamic analysis, security scanning tools, and collaborate with our incident response team to tackle product security challenges.This position offers extensive influence, autonomy, and the resources to effect substantial security enhancements across Palantir. We welcome diverse backgrounds and experiences in candidates, with an emphasis on curiosity, persistence, and a commitment to excellence.

Sep 11, 2012

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Principal Security Software Engineer - Applied Computing at SpaceX | Palo Alto, CA

Space Exploration Technologies Corp.

Full-time|On-site|Palo Alto, CA

Mar 27, 2026

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Senior Staff / Principal Engineer - Digital Ecosystem

Nubank

Full-time|On-site|Brazil, Belo Horizonte; Brazil, Campinas; Brazil, Rio de Janeiro; Brazil, Sao Paulo; USA, Durham; USA, Miami; USA, Palo Alto; USA, Washington DC

Join Nubank as a Senior Staff / Principal Engineer in our Digital Ecosystem team, where you will lead innovative projects that redefine the financial landscape in Brazil and beyond. Your expertise will shape our strategies and drive the development of scalable and secure digital solutions.

Apr 10, 2026

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Network Security Engineer

xAI

Full-time|$180K/yr - $440K/yr|On-site|Palo Alto, CA

Join xAI’s innovative security team as a Senior Network Security Engineer, where you will leverage your extensive knowledge in network security technologies, particularly in firewalls, VPNs, and routing protocols. Engage in a fast-paced environment that values adaptability and problem-solving skills, while ensuring the security of our cutting-edge AI infrastructure. Your role will involve implementing robust security measures, managing firewall configurations, and developing forward-thinking network security solutions that address our evolving challenges.

Dec 29, 2025

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Infrastructure Security Engineer

Xai

Full-time|On-site|Palo Alto, CA

Join our innovative team at Xai as an Infrastructure Security Engineer. In this role, you will be instrumental in safeguarding our infrastructure, ensuring that our systems are secure against evolving threats. You will collaborate with cross-functional teams to implement security measures and best practices.

Mar 26, 2026

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Principal Software Engineer for Medical Devices

SandboxAQ

Full-time|On-site|Palo Alto, California

About SandboxAQSandboxAQ is a rapidly growing company that provides innovative AI-driven solutions to tackle some of the most pressing challenges in the world today. Our advanced Large Quantitative Models (LQMs) are instrumental in driving progress across various sectors, including life sciences, financial services, navigation, and cybersecurity.As a global team comprised of specialists in AI, chemistry, cybersecurity, physics, mathematics, medicine, and engineering, we are committed to fostering a culture of creativity, collaboration, and significant impact. Emerging from Alphabet Inc. in 2022, we are backed by leading investors and a braintrust of industry experts.At SandboxAQ, we are dedicated to investing in our people and building a vibrant workforce ready to confront the world's major challenges. Join us to elevate your career while pursuing an inspiring mission alongside like-minded individuals who value entrepreneurship, accountability, and transformative outcomes.The OpportunityOur team at AQMed is at the forefront of developing a revolutionary, non-invasive cardiac diagnostic platform aimed at transforming heart health assessment. We blend the rigor of regulated medical device development with the agility of a startup, prioritizing quality, scientific integrity, and patient safety.We are looking for a Principal Software Engineer to act as the Technical Lead for our medical device software platform. In this pivotal role, you will oversee the software architecture for our device, encompassing everything from embedded Linux to cloud solutions.This role transcends mere execution; it embodies strategic technical leadership. While not a Product Manager, we seek a Tech Lead with a product-oriented mindset. You will architect the system with foresight, ensuring our Software as a Medical Device (SaMD) product meets future demands. Your work will establish a robust technical foundation for rapid scaling, seamless integration with hospital systems (EMR), and deployment of future AI models, enabling commercialization rather than hindering it.

Apr 1, 2026

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Security Engineer, Foundation

Pylon

Full-time|On-site|Palo Alto

Role Overview Pylon is hiring a Security Engineer focused on foundational security practices at our Palo Alto office. This role centers on building and maintaining security protocols to protect company infrastructure. What You Will Do Design, implement, and maintain security measures across systems and networks Work with teams from different disciplines to spot vulnerabilities and address them Help ensure Pylon meets relevant industry security standards and compliance requirements Location This position is based in Palo Alto.

Apr 13, 2026

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Product Security Engineer - Cloud & Infrastructure

Full-time|$137.9K/yr - $240K/yr|On-site|Palo Alto, California, United States

Product Security Engineer, Cloud & InfrastructurePalo Alto, CA (on-site)About 1XAt 1X, we are pioneering the future of work by developing humanoid robots that collaborate with humans to address labor shortages and foster abundance.The RoleAs a Product Security Engineer specializing in cloud and infrastructure, your role will be crucial in designing and maintaining secure architectures, building cloud-native security services, and safeguarding CI/CD pipelines. You will play a key part in ensuring secure communications and protecting data across 1X’s robotics platforms.Your ResponsibilitiesCollaborate closely with engineering teams to develop and maintain security-critical cloud services.Implement infrastructure-as-code security practices for consistent and secure deployments.Design and manage identity and access systems enforcing just-in-time and least-privilege access.Secure CI/CD pipelines against poisoning and credential theft while ensuring artifact integrity.Create and manage cloud-native security services for device authentication, data protection, and secure communication.Architect secure cloud networks through VPC segmentation, traffic filtering, and access control.Configure and oversee cloud security posture management (CSPM) tools to identify misconfigurations and support incident response across environments.

Sep 23, 2025

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Product Infrastructure Security Engineer

Palantir Technologies Inc.

Full-time|On-site|Palo Alto, CA

Join Palantir Technologies as a Product Infrastructure Security Engineer, where you will play a pivotal role in safeguarding our innovative software solutions. Your expertise will help us ensure the security and integrity of our products, protecting sensitive data while driving our mission forward.

Mar 25, 2026

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Security Engineer - Azure Government

xAI

Full-time|$180K/yr - $440K/yr|On-site|Palo Alto, CA; Washington, D.C.

About xAIAt xAI, our mission is to develop artificial intelligence systems that comprehend the universe and assist humanity in its quest for knowledge. Our team is composed of dedicated professionals who are passionate about engineering excellence. We seek individuals who thrive on challenges and exhibit curiosity. Operating within a flat organizational structure, we encourage all employees to take initiative and directly contribute to our mission. We value a strong work ethic and prioritization skills, along with effective communication capabilities to share insights with colleagues. About the Role We are looking for a talented Azure Security Engineer to design, implement, and maintain robust security measures across our Azure Government Cloud environment, including hybrid and multi-cloud configurations. In this hands-on role, you will enhance and uphold our cloud security posture, safeguarding critical workloads while collaborating with engineering, DevOps, and compliance teams to integrate security throughout the development lifecycle. You will utilize Microsoft’s native security tools to identify threats, respond to incidents, and ensure adherence to industry standards and regulations, including compliance with government requirements such as FedRAMP and CMMC. Key Responsibilities:Design and manage security architecture for Azure Government and Commercial deployments, considering DoD IL5/IL6 and FedRAMP High controls.Optimize Microsoft Defender for Cloud, Microsoft Sentinel, Microsoft Defender for Endpoint, and related services for effective threat detection, vulnerability management, and automated response. Establish and enforce identity and access management using Microsoft Entra ID, Privileged Identity Management (PIM), Conditional Access policies, RBAC, and just-in-time access. Secure network architectures using Azure Firewall, Network Security Groups, and other Azure security tools.

Feb 12, 2026

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Principal ASIC Design Engineer - Starshield

SpaceX

Full-time|$210K/yr - $295K/yr|On-site|Palo Alto, CA

At SpaceX, we believe that a future where humanity explores the stars is infinitely more thrilling than one where we remain Earth-bound. We are committed to developing the groundbreaking technologies that will make this vision a reality, with the ultimate aim of facilitating human life on Mars.PRINCIPAL ASIC DESIGN ENGINEER (STARSHIELD)The Starshield program harnesses SpaceX's advanced Starlink technology and launch capabilities to bolster national security initiatives. While Starlink caters to consumer and commercial markets, Starshield is specifically tailored for governmental applications, focusing initially on Earth observation, communications, and hosted payloads. As a Principal ASIC Design Engineer within the Starshield team, you will engage in pioneering development projects that support U.S. National Security. This role involves designing state-of-the-art FPGAs and ASICs intended for deployment in space and terrestrial infrastructures worldwide. You will thrive in a dynamic, collaborative environment where we tackle complex challenges and embrace the SpaceX ethos of rapid iteration to transition from design to operational capability at an extraordinary pace.

Apr 7, 2026

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Director of Security & Privacy Engineering

interface.ai

Full-time|On-site|Palo-Alto (In-office)

Banking is undergoing a transformation, with customers demanding every interaction to be seamless, personalized, and immediate.We are developing a universal banking assistant designed for millions of U.S. consumers, enabling them to transact across all financial institutions and, over time, automatically achieve their financial objectives. Powered by our innovative BankGPT platform, this assistant is set to overhaul outdated legacy systems in financial institutions and dominate the end-to-end customer experience stack, unlocking a potential $200 billion market and possibly replacing numerous publicly traded companies.Ultimately, our goal is to enhance financial well-being for millions of consumers.With over two-thirds of Americans living paycheck to paycheck, half with less than $500 in savings, and only 17% being financially literate, we aim to automate financial wellness to help address this critical issue.About the RoleAs the Director of Security & Privacy Engineering, reporting directly to the VP of Engineering, you will be instrumental in shaping and executing interface.ai's comprehensive security and privacy strategy. Your responsibilities will include developing and managing a program that guarantees our AI products and cloud infrastructure are secure, compliant, and resilient, thereby cultivating customer trust and fulfilling regulatory standards. This role combines both strategic and hands-on leadership, impacting technology, governance, and the organizational culture. You will oversee the establishment of a secure, compliant environment for our AI offerings and cloud services, all while ensuring adherence to industry regulations and enhancing customer confidence.

Apr 8, 2026

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