Platform Security Engineer Jobs

About the role We are looking for a Sr. Full Stack Application Security Engineer with deep expertise in mobile application security to join our Product Security team. This role is hands-on and impact driven. You will work directly with mobile, backend, and platform engineering teams to identify, prevent, and remediate security issues across our iOS, Android, API, and backend systems. You will operate close to the code and close to the product. That means reviewing architectures across the stack, influencing secure design decisions early, and helping teams ship features safely without slowing delivery. This role is for someone who understands how modern distributed systems and mobile apps are built, deployed, and attacked in real-world environments. While mobile application security is a core focus, you will be part of a team that owns security posture across the full application stack including APIs, backend services, identity and authentication flows, and CI/CD pipelines. In this role, you can expect to Build and improve security capabilities, automation, and guardrails for mobile applications and backend/API services Perform application or API/backend penetration testing Identify, triage, and help remediate vulnerabilities across Chime products Partner closely with engineering and product teams to embed security into the development lifecycle across mobile apps, APIs, and backend services Perform architecture and code reviews across the stack (iOS/Android, APIs, backend) with a focus on secure data storage, authentication, authorization, secure communication, and session/token handling Leverage AI to accelerate security workflows (e.g., code review support, triage, threat modeling), and partner with teams building AI-enabled features to define and implement production-grade AI security controls To thrive in this role, you have 5+ years of experience in application security, with strong hands-on experience across both mobile and backend systems Ha

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams — People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more — provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block. The Role Square Financial Services, Inc. (SFS) is Block’s bank. We opened in March 2021 and provide lending and FDIC-insured deposit products to individuals and small businesses on a nationwide basis. SFS Risk Management is scaling vendor security, third party risk, and business continuity through innovation. Our Risk team designs and promotes the frameworks, standards, and oversight that elevates security considerations among our vendors, simplifies our regulatory obligations, and ensures resilience in our business operations. The team also operates the agent-first platforms that turn those frameworks into running systems. Most of governance is a data problem. The risk, control, and asset information needed to answer "are we secure and compliant?" is dispersed across dozens of systems: Security Engineers treat that as an engineering problem. You'll build the data pipelines, integrations, and agentic AI workflows that turn manual governance processes into products that run continuously, produce measurable results, and hold up to audit end to end. You Will Own and operationalize a SFS third-party risk management and business continuity program program. Define the technical approach for ambiguous, cross-team problem spaces. This is an early-stage program, and you will frame problems as often as you solve them. Build and operate the p

For over 20 years, Smartsheet has empowered teams to manage work seamlessly and scale solutions smarter. Now, in our most ambitious chapter yet, we are uniting human teams with AI agents. By orchestrating the work agents do best, automating manual tasks and uncovering insights at scale, we create the space for people to focus on what truly matters: judgment, creativity, and big thinking. That is magic at work, and it’s what we show up for every day. Smartsheet maintains certifications and attestations across SOC 2 Type II, the ISO 27001/27017/27701/22301 suite, HIPAA, and other commercial compliance frameworks—and the manual work of proving those controls quarter after quarter doesn't scale with the business. We're looking for a Sr. Security Engineer I to bring an engineering mindset to our commercial GRC program: automating control monitoring, building evidence pipelines, and reducing the audit-season scramble into a default state of readiness. You'll work hands-on with our GRC platform, cloud, and identity tooling to make control evidence collect itself wherever possible, and you'll partner closely with engineering teams to translate compliance requirements into technical control logic they can actually build against. This is a builder's role within GRC—less checklist administration, more systems thinking applied to compliance. Our approach is grounded in GRC Engineering principles: automate early and often, treat controls and their mappings as code, favor continuous assurance over periodic checks, and build compliance that engineers can consume as easily as they contribute to it. This role reports to the Senior Director, GRC Engineering and can be based in our Bellevue, WA office or remotely from anywhere in the US where Smartsheet is a registered employer. You Will: Own control automation for SOC 2, ISO 27001/27017/27701, HIPAA, and related commercial frameworks: design and build automated evidence collection and continuous control monitoring across cloud, ident

As a Senior Security Engineer within Application Security at Datadog, you will help secure emerging application architectures where established security patterns may not yet exist, including agentic applications, LLM-enabled products, protocol-driven tool use, and untrusted execution environments. You will establish and validate security models, requirements, and controls while partnering with product and platform teams to develop secure-by-default approaches. Your work will address evolving trust boundaries, agent identity, data access, tool permissions, and runtime behavior through threat modeling, security solutions, and practical implementation. You will have the opportunity to shape how Datadog safely supports new application paradigms and address emerging security risks before they become systemic. At Datadog, we place value in our office culture - the relationships and collaboration it builds and the creativity it brings to the table. We operate as a hybrid workplace to ensure our Datadogs can create a work-life harmony that best fits them. What You’ll Do: Define security models, requirements, and guardrails for emerging application architectures where established patterns are incomplete or do not yet exist. Design, implement, and validate practical security controls that reduce risk in emerging architectures and high-risk system behaviors. Shape how emerging systems authenticate, authorize actions, isolate workloads, and access data, applying least-privilege principles throughout. Partner with product, platform, Infrastructure Security, and other engineering teams to identify security gaps and embed secure-by-default requirements from early design through production. Lead threat modeling and security assessments for new and existing products, focusing on evolving threats, unfamiliar trust boundaries, and new interaction patterns. Prioritize and drive remediation of emerging security risks, including continuous security testing where it provides durable cover

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role Join WRITER's security team as a staff detection and response engineer and help protect the AI infrastructure that's transforming how the world works. You'll build sophisticated detection systems that identify attacks targeting our AI platform, training data, and model deployments while creating automated response capabilities that scale with our explosive growth. This isn't just traditional security work – you're defending cutting-edge AI/AGI systems against adversaries who are evolving their tactics as fast as AI itself advances. This role combines hands-on security engineering with strategic thinking to stay ahead of novel threats that don't exist in textbooks yet. You'll be the operational arm of our security function, translating threat intelligence into real-time detections, coordinating incident response across multiple teams, and hunting for sophisticated attacks across GPU clusters and distributed training environments. If you're excited by the challen

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role Join WRITER's security team as a staff detection and response engineer and help protect the AI infrastructure that's transforming how the world works. You'll build sophisticated detection systems that identify attacks targeting our AI platform, training data, and model deployments while creating automated response capabilities that scale with our explosive growth. This isn't just traditional security work – you're defending cutting-edge AI/AGI systems against adversaries who are evolving their tactics as fast as AI itself advances. This role combines hands-on security engineering with strategic thinking to stay ahead of novel threats that don't exist in textbooks yet. You'll be the operational arm of our security function, translating threat intelligence into real-time detections, coordinating incident response across multiple teams, and hunting for sophisticated attacks across GPU clusters and distributed training environments. If you're excited by the challen

Role Description: We are seeking a Technical Implementation Engineer to join Commercial Cyber Operations. This person will perform hands-on systems work across varied customer environments. Compliance Leads will own NIST SP 800-171 interpretation and assessment readiness; this engineer will implement, test, and document the required technical controls with support from a senior engineer. Responsibilities: The listed responsibilities are not exhaustive and additional responsibilities may be assigned based on the evolving needs of the organization. We are seeking a dynamic individual who is able to adapt and take on new responsibilities as they arise. Configure and secure Microsoft 365, Entra ID, Active Directory, Google Workspace, Google Cloud Identity, and related business systems. Deploy and operate endpoint-management controls across multiple mobile device management and unified endpoint management platforms, including Jamf and Microsoft Intune. Implement identity, multifactor authentication, permissions, endpoint security, logging, vulnerability management, patching, backup, and recovery controls. Support Windows, macOS, iOS, Android, networks, firewalls, VPNs, DNS, and secure remote access. Troubleshoot technical issues with customer IT teams, service providers, vendors, and Defense Unicorns engineers. Test completed changes and produce accurate configuration records, diagrams, evidence, and runbooks. Complete assigned implementation work on schedule and raise risks or blockers early. Help turn repeatable work into checklists, scripts, and automation. Minimum Experience and Qualifications: Experience administering, securing, and troubleshooting business IT environments. Hands-on experience with Microsoft 365, Entra ID, Active Directory, and Google Workspace. Mobile device management or unified endpoint management experience across more than one platform, including practical experience with Jamf and Microsoft Intune. Experience supporting Windows and macOS endpoi

At Snowflake, we are powering the era of the agentic enterprise. To usher in this new era, we seek AI-native thinkers across every function who are energized by the opportunity to reinvent how they work. You don’t just use tools; you possess an innate curiosity, treating AI as a high-trust collaborator that is core to how you solve problems and accelerate your impact. We look for low-ego individuals who thrive in dynamic and fast-moving environments and move with an experimental mindset — who rapidly test emerging capabilities to discover simpler, more powerful ways to deliver results. At Snowflake, your role isn't just to execute a function, but to help redefine the future of how work gets done. We are hiring a Senior Software Engineer for our Anti-Abuse team within Security Foundations. This team is responsible for protecting Snowflake and our customers from abuse on the Snowflake platform — building foundational security primitives across a complex multi-cloud environment to combat fraud, account takeovers, data exfiltration, and AI security threats at the scale of Snowflake’s hyper-growth. AS A SENIOR SOFTWARE ENGINEER, SECURITY FOUNDATIONS AT SNOWFLAKE, YOU WILL: Design, build, and scale security-by-default capabilities that protect Snowflake products across a complex multi-cloud environment Develop intelligent security platforms and services that leverage AI/ML and risk scoring to identify, prioritize, and respond to security threats and policy violations Build real-time detection and prevention systems to defend against account compromise, AI abuse, and data exfiltration through adaptive enforcement and granular policy controls Create security intelligence and monitoring capabilities that detect suspicious account & user activity, generate actionable insights, and enable timely response Partner across Security, Engineering, and Product teams to define security strategy, influence product design, and drive adoption of secure engineering practices Raise the

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role Join WRITER's security team as a staff detection and response engineer and help protect the AI infrastructure that's transforming how the world works. You'll build sophisticated detection systems that identify attacks targeting our AI platform, training data, and model deployments while creating automated response capabilities that scale with our explosive growth. This isn't just traditional security work – you're defending cutting-edge AI/AGI systems against adversaries who are evolving their tactics as fast as AI itself advances. This role combines hands-on security engineering with strategic thinking to stay ahead of novel threats that don't exist in textbooks yet. You'll be the operational arm of our security function, translating threat intelligence into real-time detections, coordinating incident response across multiple teams, and hunting for sophisticated attacks across GPU clusters and distributed training environments. If you're excited by the challen

🚀 About WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Seattle, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 About the role Join WRITER's security team as a staff detection and response engineer and help protect the AI infrastructure that's transforming how the world works. You'll build sophisticated detection systems that identify attacks targeting our AI platform, training data, and model deployments while creating automated response capabilities that scale with our explosive growth. This isn't just traditional security work – you're defending cutting-edge AI/AGI systems against adversaries who are evolving their tactics as fast as AI itself advances. This role combines hands-on security engineering with strategic thinking to stay ahead of novel threats that don't exist in textbooks yet. You'll be the operational arm of our security function, translating threat intelligence into real-time detections, coordinating incident response across multiple teams, and hunting for sophisticated attacks across GPU clusters and distributed training environments. If you're excited by the challen

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role The Security EDR Workflows team is in charge of building core capabilities that power Elastic Defend management experience. Our focus is on delivering policy configuration and management capabilities, Elastic Defend and third party providers response actions as forensics capabilities through OSquery. The team is leading XDR key expansion to our SIEM foundations and enhancing user experience in onboarding and managing our security product. As a Software Engineer on the Security EDR Workflows team, you will help build workflows and user-facing capabilities that get to our Elastic Defend agent to protect and respond against security threats. You’ll collaborate closely with other security engineering teams, as well as with product and design, to deliver robust, high-scale features used by security practitioners around the world. You’ll be using AI to quickly understand and solve problems. What You Will Be Doing You’ll implement features that power Elastic Defend user interface capabilities. You’ll contribute to the architecture of Elastic Defend management and response actions framework along with OSquery forensics capabilities. You’ll develop scalable, high performance systems within the Elastic ecosystem. Write production-grade code in Typescript/Node JS (and potentially other languages) as part of high-quality, well-tested

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role The Security EDR Workflows team is in charge of building core capabilities that power Elastic Defend management experience. Our focus is on delivering policy configuration and management capabilities, Elastic Defend and third party providers response actions as forensics capabilities through OSquery. The team is leading XDR key expansion to our SIEM foundations and enhancing user experience in onboarding and managing our security product. As a Software Engineer on the Security EDR Workflows team, you will help build workflows and user-facing capabilities that get to our Elastic Defend agent to protect and respond against security threats. You’ll collaborate closely with other security engineering teams, as well as with product and design, to deliver robust, high-scale features used by security practitioners around the world. You’ll be using AI to quickly understand and solve problems. What You Will Be Doing You’ll implement features that power Elastic Defend user interface capabilities. You’ll contribute to the architecture of Elastic Defend management and response actions framework along with OSquery forensics capabilities. You’ll develop scalable, high performance systems within the Elastic ecosystem. Write production-grade code in Typescript/Node JS (and potentially other languages) as part of high-quality, well-tested

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role The Security EDR Workflows team is in charge of building core capabilities that power Elastic Defend management experience. Our focus is on delivering policy configuration and management capabilities, Elastic Defend and third party providers response actions as forensics capabilities through OSquery. The team is leading XDR key expansion to our SIEM foundations and enhancing user experience in onboarding and managing our security product. As a Software Engineer on the Security EDR Workflows team, you will help build workflows and user-facing capabilities that get to our Elastic Defend agent to protect and respond against security threats. You’ll collaborate closely with other security engineering teams, as well as with product and design, to deliver robust, high-scale features used by security practitioners around the world. You’ll be using AI to quickly understand and solve problems. What You Will Be Doing You’ll implement features that power Elastic Defend user interface capabilities. You’ll contribute to the architecture of Elastic Defend management and response actions framework along with OSquery forensics capabilities. You’ll develop scalable, high performance systems within the Elastic ecosystem. Write production-grade code in Typescript/Node JS (and potentially other languages) as part of high-quality, well-tested

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role The Security EDR Workflows team is in charge of building core capabilities that power Elastic Defend management experience. Our focus is on delivering policy configuration and management capabilities, Elastic Defend and third party providers response actions as forensics capabilities through OSquery. The team is leading XDR key expansion to our SIEM foundations and enhancing user experience in onboarding and managing our security product. As a Software Engineer on the Security EDR Workflows team, you will help build workflows and user-facing capabilities that get to our Elastic Defend agent to protect and respond against security threats. You’ll collaborate closely with other security engineering teams, as well as with product and design, to deliver robust, high-scale features used by security practitioners around the world. You’ll be using AI to quickly understand and solve problems. What You Will Be Doing You’ll implement features that power Elastic Defend user interface capabilities. You’ll contribute to the architecture of Elastic Defend management and response actions framework along with OSquery forensics capabilities. You’ll develop scalable, high performance systems within the Elastic ecosystem. Write production-grade code in Typescript/Node JS (and potentially other languages) as part of high-quality, well-tested

Elastic, the Search AI Company, enables everyone to find the answers they need in real time, using all their data, at scale — unleashing the potential of businesses and people. The Elastic Search AI Platform, used by more than 50% of the Fortune 500, brings together the precision of search and the intelligence of AI to enable everyone to accelerate the results that matter. By taking advantage of all structured and unstructured data — securing and protecting private information more effectively — Elastic’s complete, cloud-based solutions for search, security, and observability help organizations deliver on the promise of AI. What is The Role The Security EDR Workflows team is in charge of building core capabilities that power Elastic Defend management experience. Our focus is on delivering policy configuration and management capabilities, Elastic Defend and third party providers response actions as forensics capabilities through OSquery. The team is leading XDR key expansion to our SIEM foundations and enhancing user experience in onboarding and managing our security product. As a Software Engineer on the Security EDR Workflows team, you will help build workflows and user-facing capabilities that get to our Elastic Defend agent to protect and respond against security threats. You’ll collaborate closely with other security engineering teams, as well as with product and design, to deliver robust, high-scale features used by security practitioners around the world. You’ll be using AI to quickly understand and solve problems. What You Will Be Doing You’ll implement features that power Elastic Defend user interface capabilities. You’ll contribute to the architecture of Elastic Defend management and response actions framework along with OSquery forensics capabilities. You’ll develop scalable, high performance systems within the Elastic ecosystem. Write production-grade code in Typescript/Node JS (and potentially other languages) as part of high-quality, well-tested