Director of Security & Privacy Engineering

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.

Role Overview Pylon is hiring an Infrastructure Engineer, Foundation, based in Palo Alto. This role focuses on designing, implementing, and maintaining infrastructure that supports the company’s core products and services. The work directly supports operational reliability and technical growth across the organization. What You Will Do Design and build infrastructure solutions to support Pylon’s main offerings Maintain and improve existing systems to ensure reliability and performance Work with teams across engineering and other functions to integrate and support infrastructure needs Identify opportunities to optimize system performance and scalability Who We’re Looking For Proactive approach to problem solving and infrastructure development Interest in building scalable systems and improving performance Comfort working closely with cross-functional teams

About Glean:Established in 2019, Glean is a pioneering AI-driven knowledge management platform that empowers organizations to swiftly locate, organize, and disseminate information throughout their teams. By seamlessly integrating with tools such as Google Drive, Slack, and Microsoft Teams, Glean ensures that employees have timely access to essential knowledge, thereby enhancing productivity and collaboration. Our state-of-the-art AI technology streamlines knowledge discovery, facilitating a more efficient utilization of collective intelligence across teams.Glean originated from Founder & CEO Arvind Jain’s profound insight into the challenges that employees encounter while seeking and comprehending information at work. Witnessing firsthand how fragmented knowledge and a multitude of SaaS tools hindered productivity, he aimed to create an enhanced solution – an AI-powered enterprise search platform that enables rapid and intuitive access to necessary information. Since its inception, Glean has transformed into a leading Work AI platform, merging enterprise-grade search, an AI assistant, and robust application and agent-building capabilities to fundamentally reshape the modern workplace.About the RoleWe are in search of a Software Engineer to become a vital member of Glean’s Data Foundations team—the unit responsible for the comprehensive data ingestion and management layer that powers Glean’s Search, AI Assistant, and Agent offerings across a multitude of enterprise applications and vast quantities of documents.Your contributions will directly influence the quality, timeliness, and reliability of the knowledge that each Glean user engages with daily.Your Responsibilities Include:Ingestion & ConnectivityDevelop and enhance connectors for a diverse array of SaaS and on-premise systems (including Google Workspace, Microsoft 365, Slack, Salesforce, Jira, ServiceNow, GitHub, etc.).Ensure the seamless integration and continuous improvement of data flows to maintain system performance and reliability.

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.

About AppLovinAppLovin develops innovative technologies that empower businesses of all sizes to connect with their target customers effectively. Our comprehensive software and AI solutions enable companies to reach, monetize, and expand their global audiences. To learn more about us, please visit: www.applovin.com.Our mission is supported by a diverse global team whose life experiences, backgrounds, and perspectives reflect those of our developers and customers worldwide. At AppLovin, we are intentional about fostering a supportive team culture, and we seek candidates who excel individually and uplift others.Recognized by Fortune as one of the Best Workplaces in the Bay Area, AppLovin has been a Certified Great Place to Work for four consecutive years (2021-2024). Discover more about our accolades HERE.About UsAt AppLovin, we are driving the future of product discovery and engagement through state-of-the-art machine learning. Recommender systems significantly influence the daily lives of billions—determining what we watch, read, play, and purchase. They not only shape cultural trends but also contribute to trillions of dollars in market value across advertising, commerce, and streaming, promoting economic growth and job creation globally, and this sector continues to expand at double-digit rates annually. The modern recommendation framework was established about a decade ago, yet we envision that the next generation of models will differ fundamentally. We are building a research team dedicated to shaping that future. The OpportunityWe are forming a premier academic-industrial hybrid research group to advance recommender systems. Unlike traditional academia, your contributions will not merely reside in research papers — they will be implemented in real-world products, utilized by millions, and validated on a large scale. This is your opportunity to push the boundaries of science and witness your ideas reshape how the world discovers content. What You’ll DoDrive foundational research to establish new recommendation models and paradigms.

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.

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.

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.

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.

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.

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 platform designed to mitigate risks, detect and respond to threats, and thwart breaches at their origin. Our team comprises seasoned leaders who have helped shape the fields of endpoint and identity security at renowned companies like CrowdStrike, Okta, Cylance, and Carbon Black. We are currently redefining SaaS security in the age of agentic AI. Obsidian Security is trusted by global enterprises, including Snowflake, T-Mobile, and Pure Storage, protecting over 200 organizations across North America, Europe, the Middle East, Southeast Asia, Australia, and New Zealand—many of which are among the world’s largest Fortune 1000 and Global 2000 companies. With robust global momentum, an expanding partner ecosystem featuring SentinelOne, Databricks, and Google Cloud, and a significant fundraising round on the horizon, we are rapidly scaling towards long-term growth and IPO readiness. Join us in shaping the future of SaaS security!

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.

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.

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.

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.

About SimileAt Simile, we are redefining how society’s most impactful decisions are made. Just as pilots and surgeons practice under controlled conditions, we believe that critical societal choices should not be made in untested environments.Our groundbreaking AI simulation of society, powered by generative agents modeled after real humans, is revolutionizing the field of AI-driven simulation. We are on a mission to accurately predict human behavior across diverse scenarios and scales.With $100 million in funding from renowned investors such as Index Ventures, Hanabi, A*, Bain Capital Ventures, and notable AI pioneers like Andrej Karpathy and Fei-Fei Li, we are poised for remarkable growth.

Join SpaceX as a Security Software Engineer in Applied Computing, where you'll play a crucial role in developing and implementing security solutions for our Starshield project. You will collaborate with a talented team to enhance the security posture of our cutting-edge software applications, ensuring they meet the highest standards of protection against potential threats.

About Glean:Established in 2019, Glean is a pioneering knowledge management platform powered by AI, designed to facilitate organizations in swiftly locating, organizing, and sharing information across their teams. Seamlessly integrating with tools such as Google Drive, Slack, and Microsoft Teams, Glean ensures that employees can access essential knowledge precisely when they need it, enhancing both productivity and collaboration. By leveraging advanced AI technology, Glean transforms knowledge discovery into a more expedited and efficient process, empowering teams to harness their collective intelligence.Founded by CEO Arvind Jain, Glean emerged from a profound understanding of the challenges employees encounter in navigating and comprehending workplace information. Witnessing the fragmentation of knowledge and the complexities of multiple SaaS tools that hinder productivity, he envisioned a more effective solution—an AI-driven enterprise search platform that allows individuals to quickly and intuitively access the information they require. Since its inception, Glean has grown into a leading Work AI platform, merging enterprise-grade search, an AI assistant, and robust application- and agent-building features to revolutionize how employees engage with their work.About the Role:Glean is seeking a proficient Application Security Engineer dedicated to safeguarding our technology stack from software vulnerabilities (CVEs). This pivotal role encompasses securing our base operating system images, ensuring that all open-source software (OSS) dependencies are thoroughly scanned and patched, and integrating state-of-the-art security tools into our CI/CD pipeline. The ideal candidate will advocate for the adoption of solutions such as Google’s Assured Open Source Software (OSS) and investigate alternative methodologies to bolster software security.This position will spearhead the vulnerability management initiatives at Glean, identifying, assessing, and implementing innovative security technologies and processes to proactively shield our infrastructure.Key Responsibilities:Take ownership and lead the vulnerability management strategy, ensuring comprehensive security across our applications.

Product Security Engineer - Operating SystemPalo Alto, CA (on-site)About 1XAt 1X, we are pioneers in developing humanoid robots designed to collaborate with humans, addressing labor shortages and fostering abundance in various sectors.The RoleWe are on the lookout for a skilled Product Security Engineer specializing in operating system security to enhance the robustness of our robotics platform. In this pivotal role, you will architect and implement critical security features such as secure boot, trusted execution environments, and service hardening. Your contributions will be essential in safeguarding sensitive operations and data while empowering our developers to adhere to security best practices. This position plays a vital role in bolstering the resilience and trustworthiness of our systems.You WillDevelop and maintain secure critical services for Linux systemsImplement secure boot chains utilizing fused hardware keys with rollback protectionIntegrate OP-TEE to protect sensitive assets, including mTLS certificates and disk encryption keysHarden system services using least-privilege operations, systemd features, namespacing, and syscall filteringCreate hardening templates and automation tools to facilitate security enforcement for developersAutomate security validation processes within CI/CD pipelinesDesign and enforce device access controls for Linux systemsContribute and deploy C/C++ code (or similar) into production environments