Join Our Team at MacroscopeAt Macroscope, we are dedicated to providing unparalleled insight into the software development landscape. Our mission is to empower leaders with the clarity they need and engineers with the time they deserve.We facilitate a deeper understanding of product and codebase evolution—identifying changes, tracking team contributions, and highlighting progress—all rooted in the ultimate truth: the code itself.Founded by seasoned entrepreneurs with a track record of launching and selling successful ventures, and seasoned executives from publicly traded tech companies, we are backed by premier venture capital firms and angel investors, including Lightspeed Venture Partners, Thrive Capital, Google Ventures, and Adverb.Your RoleWe are seeking a Senior Security Engineer to fortify and expand the security framework of Macroscope’s platform. In this pivotal role, you will design and implement robust security architectures, controls, and secure-by-default protocols across our distributed systems, infrastructure, and APIs that drive our core product.You will spearhead initiatives aimed at protecting customer data, reinforcing our production environment, and elevating security standards throughout our product offerings. Your expertise will ensure our systems adapt to customer demands while upholding enterprise-level security. Collaboration with the engineering team will be crucial as you establish best practices in identity and access management, cloud security, secure CI/CD, secrets management, vulnerability management, and production monitoring.As part of our compact team, you will work closely with founders, engineers, and designers to make architectural choices that will shape the future of our product and organization. This hands-on position is ideal for someone passionate about creating secure systems and empowering the team to innovate swiftly without compromising safety.Technology Stack: Typescript/React (frontend), Golang (backend), Temporal, Google Cloud (GCP), Postgres, Terraform, and custom-built AST “code walkers” in various languages (Golang, Typescript, Swift, Python, Rust).

Metriport is looking for a Senior Security Engineer to join the team in San Francisco. The role centers on safeguarding company infrastructure and maintaining the security of sensitive data. Candidates should bring deep experience with security protocols and risk assessment, with a focus on countering new and evolving threats. Key responsibilities Evaluate risks and pinpoint vulnerabilities throughout Metriport's infrastructure Create and apply security measures that protect data integrity and confidentiality Collaborate with colleagues across departments to improve security practices Monitor the latest security threats and adjust strategies as needed Location This role is based in San Francisco.

About Cogent SecurityCogent Security is pioneering the future of cybersecurity through Applied AI, creating advanced AI agents designed to combat rapidly evolving cyber threats. Our AI Taskforce analyzes vast datasets to neutralize potential breaches before they impact our clients.Our commitment to innovation combines cutting-edge research with practical application, ensuring our solutions are at the forefront of technology. In addition to our product development, Cogent Research acts as our applied AI laboratory, supplying the expertise required to create highly effective security workflows.Since our launch from stealth mode, Cogent has seen remarkable growth, collaborating with Fortune 500 companies to secure some of the most intricate production environments globally.Backed by Greylock, our team consists of exceptional talents from leading universities such as Stanford, Berkeley, and Carnegie Mellon, as well as high-growth companies like Scale AI and Tesla, and cybersecurity experts from stalwarts like Wiz and DeepMind.

Join our dynamic team at Cloudflare as a Senior Software Engineer specializing in Security. In this role, you will work on cutting-edge security solutions that protect our customers' data and privacy. You will collaborate with cross-functional teams to design, develop, and implement robust security features while ensuring the scalability and performance of our systems. Your expertise in software engineering and security practices will be essential in driving innovation and leading projects to enhance our security posture.

About Cogent SecurityCogent Security is at the forefront of cybersecurity innovation, leveraging Applied AI to develop next-generation AI agents. In an era where cyber attacks evolve rapidly, our AI Taskforce analyzes vast amounts of enterprise data to proactively address vulnerabilities and prevent critical breaches.We combine pioneering research with practical execution, ensuring that our innovative solutions meet real-world challenges. Our Cogent Research division acts as our dedicated AI lab, driving the development of advanced security workflows.Since our emergence from stealth mode, we have rapidly grown, collaborating with Fortune 500 companies to secure complex production environments globally.Supported by Greylock, we have gathered a team of top talent from renowned institutions and leading organizations in the AI and cybersecurity sectors.About the RoleAs an Agent Engineer at Cogent Security, you will be pivotal in designing, building, and deploying critical AI agents tailored for complex client environments. Your role is highly cross-functional, involving direct collaboration with customers to understand their unique needs, adapting our platform accordingly, and iterating on scalable solutions to handle millions of real-world security events.You will manage projects from inception to deployment, including data onboarding and integrating feedback into our core agent platform. Your contributions will shape how AI agents detect threats, triage incidents, and automate security workflows for some of the most sophisticated organizations worldwide.This position is ideal for engineers who excel in dynamic environments, enjoy tackling complex technical challenges, and wish to see the tangible impact of their work.

About Cogent SecurityCogent Security is an innovative Applied AI Lab pioneering the future of AI agents in the realm of cybersecurity. In a world where cyber threats evolve at unprecedented speeds, our 'AI Taskforce' analyzes vast amounts of enterprise data to proactively address vulnerabilities and avert critical breaches.We remain at the forefront of technology by merging cutting-edge research with practical applications. Our dedicated Cogent Research team fuels our mission, ensuring we develop truly effective security workflows powered by AI.Since our inception, Cogent has rapidly grown, collaborating with Fortune 500 companies to safeguard the most intricate production environments globally.Supported by Greylock, our team comprises some of the brightest minds in applied AI, including experts from:Renowned universities such as Stanford, Berkeley, Penn, Duke, Carnegie Mellon, and Waterloo.High-growth unicorn companies like Scale AI, Databricks, Stripe, Tesla, and Coinbase.Leading cybersecurity specialists from Wiz, Abnormal AI, and Zscaler.Prestigious research institutions including DeepMind and SAIL.About the RoleAs we embark on building a suite of backend services and integrations with our design partners, we seek passionate and skilled Backend Engineers at both Senior and Staff levels, eager to thrive in the Applied AI domain.ResponsibilitiesDesign and implement critical backend subsystems and integration platformsComprehend business objectives and customer requirements to engineer backend subsystems that align with our technology strategies.Adapt systems to meet evolving needs of design partners and clients.Incorporate non-functional requirements such as compliance and security into system design.Establish scalable infrastructure foundationsPrepare for future growth in customer base, headcount, and data management by collaborating with your team to enhance infrastructure.

Join Decagon as a Security Engineer where you will play a crucial role in safeguarding our systems and data. You will collaborate with cross-functional teams to identify vulnerabilities, implement security measures, and ensure compliance with industry standards. This is an exciting opportunity to work in a dynamic environment and contribute to the security posture of our organization.

Juicebox is looking for a Security Engineer based in San Francisco. The main focus is to safeguard digital infrastructure and maintain the security of systems and data. Key responsibilities Develop and apply security measures throughout company systems Support compliance efforts with relevant industry security standards Location This role is based in San Francisco.

About Plaud Inc.At Plaud, we are on a mission to create the world's most reliable AI work companion, enhancing productivity through innovative note-taking solutions embraced by over 1.5 million users globally since our inception in 2023. We aim to elevate human intelligence by developing next-generation intelligence infrastructure and interfaces that capture, extract, and utilize your thoughts, words, and perceptions.Located in San Francisco, California, Plaud Inc. is a Delaware-registered company that is redefining the intersection of human and AI intelligence through a unique combination of hardware and software solutions. Our adherence to the highest standards of data security and privacy protection is reflected in our ISO 27001, ISO 27701, GDPR, SOC 2, HIPAA, and EN 18031 certifications.Discover more about us at https://www.plaud.ai and connect with us on Instagram, X, Facebook, LinkedIn, and YouTube.Why Join Plaud?As a rapidly growing and profitable company with a remarkable $250 million revenue run rate achieved in just three years, Plaud offers an exciting opportunity to shape the future of human-AI interaction.Be a pioneer in defining the next-generation paradigm for human-AI interaction.Work with state-of-the-art AI tools and contribute to our global growth journey.Collaborate with a passionate team that values innovation, teamwork, and customer success.Advance your career in a culture that promotes continuous learning and professional development.

About Cogent SecurityCogent Security is at the forefront of innovation in cybersecurity, operating as an Applied AI Lab dedicated to developing next-generation AI agents. In an era where cyber threats evolve rapidly, our "AI Taskforce" analyzes vast amounts of enterprise data to proactively address vulnerabilities and prevent significant breaches.Blending cutting-edge research with practical implementation, our team works diligently to transform theoretical concepts into actionable security solutions. Our applied AI lab, Cogent Research, provides essential research capabilities that enable the realization of autonomous security workflows.Since our emergence from stealth mode, Cogent has seen impressive growth, collaborating with Fortune 500 companies to enhance security in some of the world’s most complex environments.Supported by Greylock, we have assembled a team of top-tier talent from influential universities and leading companies in the tech and cybersecurity sectors.

Join Our Team at MercorAt Mercor, we sit at the cutting edge of labor markets and AI innovation. Collaborating with top AI laboratories and enterprises, we provide the vital human intelligence necessary for the advancement of AI development.Our extensive talent network trains advanced AI models, sharing insights and experiences that transcend mere coding. Daily, over 30,000 experts in our community collectively generate more than $2 million.Mercor is pioneering a new realm of work wherein expertise fuels AI progress. This ambition calls for a dynamic, fast-paced, and dedicated team. You will collaborate with researchers, operational teams, and AI firms at the forefront of redefining our societal systems.As a profitable Series C enterprise valued at $10 billion, we operate in-person five days a week from our newly established headquarters in San Francisco.About the RoleIn your capacity as a Security Engineer at Mercor, you will be entrusted with the crucial task of protecting our systems, infrastructure, and sensitive data. You will design and execute defense mechanisms, monitor for potential threats, and ensure that security is seamlessly integrated throughout the entire development and deployment lifecycle. This position is perfect for an individual who thrives in fast-paced settings, anticipates risks proactively, and enjoys constructing effective, scalable security systems without hindering innovation.Your ResponsibilitiesDesign and implement robust security controls across our infrastructure, applications, and networks.Continuously monitor for vulnerabilities, threats, and any suspicious activities.Conduct penetration tests, vulnerability assessments, and manage incident responses.Integrate security practices into CI/CD pipelines and development workflows.Ensure compliance with standards such as SOC 2, ISO 27001, and GDPR.Collaborate with engineers to ensure security is prioritized in system design.Research emerging threats and implement proactive countermeasures.Ideal CandidateProfound understanding of security principles, tools, and industry best practices.Experience with SIEMs, IDS/IPS, firewalls, and vulnerability scanning.Familiarity with cloud security environments (AWS, GCP, or Azure).Solid foundation in encryption and secure coding practices.

Join Astranis as a Senior Product Security Engineer, where you will play a pivotal role in safeguarding our innovative satellite technology. Your expertise will ensure that our products are secure from design through development and into deployment. Collaborate with cross-functional teams to implement security best practices, conduct risk assessments, and respond to security incidents effectively.

Join Perplexity as a Senior Cloud Security Engineer and play a pivotal role in transforming how users search and interact with the internet. As a key member of our innovative security team, you will spearhead initiatives to construct and sustain secure and scalable cloud infrastructure, enabling our engineers to innovate swiftly and securely.Core ResponsibilitiesCollaborate with infrastructure and engineering teams to embed security measures into development processes and advocate for secure-by-default practices.Develop Terraform modules that incorporate essential security features, including logging, encryption, and automated threat detection.Implement cloud-native detection capabilities utilizing AWS GuardDuty, Security Hub, and tailor-made detection rules to uncover credential breaches, crypto-mining, and lateral movements.Ensure compliance with SOC 2 Type II and ISO 27001 by automating the collection of cloud control evidence.Conduct security assessments of cloud resource configurations using tools like AWS Config and Open Policy Agent, addressing discrepancies in line with CIS Benchmarks and internal security policies.Fortify CI/CD and supply chain pipelines through controls such as artifact signing, secret scanning, and dependency monitoring.Implement zero trust principles via stringent network segmentation, authentication, and authorization across cloud environments.Engage in security on-call rotation, responding to security alerts and incidents for prompt resolution and root cause analysis.

About GridwareGridware is an innovative technology firm located in San Francisco, committed to enhancing the resilience and safety of the electrical grid. We have pioneered a revolutionary approach to grid management known as Active Grid Response (AGR), which focuses on monitoring the electrical, physical, and environmental variables influencing grid reliability and safety. Our advanced AGR platform integrates high-precision sensors to identify potential issues at an early stage, facilitating proactive maintenance and fault resolution. This holistic strategy aims to enhance safety, minimize outages, and optimize grid performance. We are proud to be supported by prominent climate-tech and Silicon Valley investors. For more details, please visit www.Gridware.io.Role OverviewWe are on the lookout for a skilled Security Operations Engineer to bolster and scale the security measures within our cloud-centric environment. In this pivotal role, you will enhance our detection and response capabilities, fortify identity and access controls, and refine the systems and processes that ensure our infrastructure's resilience.Your collaboration with engineering, IT, and infrastructure teams will be crucial in embedding security best practices throughout our development processes. This position suits a proactive security expert who thrives in dynamic settings and is passionate about enhancing visibility, automation, and operational readiness.

Join CodeRabbit as Our Lead Security EngineerAt CodeRabbit, we are at the forefront of innovation in research and development, dedicated to creating groundbreaking human-machine collaboration systems. Our vision is to revolutionize the future of software development through the integration of Gen AI-driven code reviewers, facilitating an unparalleled partnership between human creativity and advanced algorithms. By harnessing the power of language models and human intellect, we aim to redefine efficiency and quality in software development.Position Summary:We are seeking a seasoned Lead Security Engineer to join our mission of empowering developers with high-performance tools in a rapidly evolving threat landscape. In this pivotal role, you will be responsible for architecting, fortifying, and safeguarding our infrastructure and ecosystem.As the Lead Security Engineer, you will infuse security into all aspects of our product and infrastructure, serving as the guardian of resilience, incident response, and proactive defense at scale.Key Responsibilities:Define the Security Roadmap: Develop and implement a strategic security engineering plan that aligns with CodeRabbit’s agile engineering processes.Enhance Resilience: Advocate for defense-in-depth strategies, including threat modeling, secure design reviews, hardening, and CI/CD integration.Lead Incident Response: Take charge of security incident response and recovery, ensuring effective triage, resolution, and root cause analysis to bolster system integrity.Security Tools & Automation: Develop or integrate security tools (SAST, DAST, SIEM, EDR, monitoring) seamlessly into the developer workflow to maintain high delivery velocity.Integrate Security Practices: Collaborate with engineering and product teams to ensure secure practices are incorporated early in project planning and daily operations.Cultivate Talent & Culture: Contribute to hiring, coaching, and mentoring a resilient security engineering team while promoting security awareness throughout the organization.Establish Compliance & Policy: Develop security standards, frameworks, and processes that evolve with our growth while remaining streamlined and developer-friendly.Qualifications:Proven Experience: 8+ years in security engineering, incident response, or related fields. Leadership experience during critical situations is a plus.Technical Proficiency: In-depth knowledge of security best practices, threat modeling, and incident management.Collaborative Mindset: Strong interpersonal skills and the ability to work effectively across multidisciplinary teams.Adaptability: Eagerness to learn and adapt in a dynamic and fast-paced environment.

Role OverviewAt Variance, we are at the forefront of teaching machines to execute high-stakes judgment calls on a large scale. This involves developing AI agents that navigate the complex domains of risk investigations, fraud detection, and identity verifications.Our San Francisco-based team is small yet exceptionally talented, comprising former founders and specialists from leading AI laboratories. We cater to an impressive clientele, including Fortune 500 companies, global marketplaces, and regulated financial institutions. If you are passionate about taking ownership, working swiftly, and collaborating closely with founders, you will thrive in our environment.We are seeking a Security Engineer to help establish a robust security foundation. You will collaborate across product, infrastructure, and internal systems to ensure that Variance is secure by design, enabling us to meet the rigorous standards needed to deploy AI in critical workflows for the world’s largest corporations.

Join Our Innovative TeamAs we approach the year 2026, we face what is being called the "infinite software crisis." At Sazabi, we are dedicated to solving this issue with our cutting-edge AI-native observability platform designed specifically for agile engineering teams.Our platform empowers teams to effortlessly inquire about their production systems using natural language, visualize real-time data, and swiftly identify root causes—10 times faster than traditional methods. No cumbersome instrumentation, no dashboard setups, and no alert configurations required—just straightforward solutions.We are proud to have the support of industry leaders from premier AI companies such as Vercel, Graphite, Daytona, Browserbase, LangChain, Mastra, Replit, and others.

This Security Engineer role at Superhuman Platform Inc. is based in San Francisco and follows a hybrid work model. The schedule blends focused individual work with regular in-person collaboration, supporting strong team relationships and encouraging innovation. Role overview Superhuman seeks a Security Engineer to help protect the trust of millions of users. The position centers on collaborating with partners to identify and deliver projects that strengthen security and reduce risk across Superhuman’s products, platform, and IT systems. As Superhuman’s suite of AI productivity tools grows, the technical landscape becomes more complex, offering opportunities to solve new challenges and influence the product roadmap. Insights into the engineering team can be found on the technical blog. What you will do Design and implement secure-by-default architectures to make it easier for developers to build securely across Superhuman’s ecosystem. Lead the adoption of AI and automation in security, including automated threat detection and AI-assisted code reviews and vulnerability analysis. Translate security requirements into actionable roadmaps that align with business objectives, supporting both technical and non-technical teams. Balance security best practices with product innovation, ensuring risk is addressed throughout the development process. Learn more about Superhuman’s mission and values at superhuman.com and review the company’s values here.

At Thinking Machines Lab, our mission is to enhance human capabilities through the development of collaborative general intelligence. We are dedicated to creating a future where everyone can utilize AI tailored to their specific needs and aspirations.Our team consists of accomplished scientists, engineers, and innovators responsible for some of the most popular AI applications, including ChatGPT and Character.ai, along with renowned open-weight models like Mistral and influential open-source projects such as PyTorch, OpenAI Gym, Fairseq, and Segment Anything.About the RoleWe are on the lookout for a passionate Software Engineer with a focus on security to ensure our products are secure by design while facilitating rapid and ambitious product development. You will collaborate closely with product and research teams to integrate security measures into the design and development processes, and create tools and automation to maintain system safety at scale.Note: This is an ongoing opportunity, and we encourage you to express your interest. While we receive numerous applications and there may not always be an immediate match for your skills, we encourage you to apply. We consistently review applications and will reach out as new roles become available. You may reapply if you gain additional experience, but please limit applications to once every six months. We also post specific roles for particular projects or teams, and you are welcome to apply for those as well.What You’ll DoCollaborate with product and research teams to integrate security into the development lifecycle: threat modeling, design reviews, and establishing secure defaults for new features.Design and implement security controls throughout our product stack (authentication, authorization, session management, input validation, etc.).Create and maintain security tooling and automation for engineers: secure frameworks and templates, CI/CD checks, dependency management, and vulnerability detection.Work alongside researchers to identify and address AI-specific product risks, such as model abuse, prompt injection, data leakage, or misuse of capabilities.Enhance observability and detection for security-related events: access anomalies, abuse patterns, and suspicious behavior in production.