Senior Software Engineer (Security) at Cloudflare | San Francisco

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.

Join Cloudflare as a Senior Solutions Engineer, where you will leverage your technical expertise and fluency in Russian to provide exceptional solutions to our clients. In this role, you will work closely with both customers and internal teams to design and implement cutting-edge security and performance solutions tailored to meet diverse business needs.

Join Cloudflare as a Software Engineer specializing in security! In this dynamic role, you will be responsible for developing innovative security solutions to protect our platform and users. You'll collaborate with cross-functional teams to design, implement, and enhance security features that maintain the integrity of our services.

Join Cloudflare as a Senior Software Engineer in our Registrar team, where you'll be at the forefront of developing innovative solutions for domain registration services. This role offers you the opportunity to leverage your expertise in software development to enhance our platform's performance and scalability, ensuring a seamless experience for our customers.

About the Role Cloudflare is looking for a Procurement Intern in San Francisco, CA (hybrid). This internship offers practical experience in technology procurement and exposure to the daily operations of a global company. What You Will Do Support sourcing and purchasing activities for goods and services used across Cloudflare. Work alongside procurement team members to learn about supplier management and strategic sourcing. Assist with procurement processes and documentation in a collaborative setting. Location This position is based in San Francisco, CA with a hybrid work arrangement.

Role Overview Cloudflare is hiring a Senior Solutions Engineer to support Enterprise Accounts in San Francisco. This hybrid role centers on understanding client needs and applying technical knowledge to shape solutions that improve the customer experience with Cloudflare's services. What You Will Do Work closely with enterprise clients to identify requirements and recommend effective solutions. Collaborate with teams across Cloudflare to ensure delivery meets client expectations. Contribute to ongoing improvements and innovation in the solutions offered to customers. Location This position is based in San Francisco with a hybrid work arrangement.

Join Cloudflare as a Senior Software Engineer specializing in Traffic Management, where you will play a pivotal role in enhancing our global network infrastructure. Collaborate with a talented team to develop scalable solutions that optimize traffic flow and improve performance for millions of users worldwide.

Join Cloudflare as a Senior Software Engineer in our Network Development team, where you will design and implement innovative network solutions that enhance our global infrastructure. This role offers the opportunity to work with cutting-edge technologies and collaborate with talented engineers to drive significant improvements in network performance and reliability.

As a Security Assurance Analyst at Cloudflare, you will play a crucial role in protecting our network and services. You will collaborate with various teams to enhance our security protocols and ensure compliance with industry standards. Your analytical skills will be key in identifying potential vulnerabilities and implementing effective solutions to mitigate risks.

Join our dynamic team at Cloudflare as a Senior Software Engineer specializing in Enterprise Readiness. This role demands a high level of technical expertise and a passion for building robust, scalable systems that enhance the enterprise experience. You will collaborate with cross-functional teams to design, develop, and implement innovative solutions that drive performance and efficiency.

Join Cloudflare as a Senior Software Engineer specializing in Billing. In this role, you will work on innovative solutions to enhance our billing systems, ensuring accuracy and efficiency. Collaborate with cross-functional teams to deliver exceptional services to our clients.

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).

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.

About the RoleJoin Perplexity as a dynamic Software Engineer specializing in security, where you will play a pivotal role in developing and enhancing the software, automation, and systems that drive our security operations. This position focuses on engineering innovative security tools and AI-driven agents aimed at improving our detection and response capabilities, vulnerability management, and overall security posture across our products and infrastructure.ResponsibilitiesDesign, build, and maintain software and automation solutions that enhance our detection and response capabilities, including alert enrichment, triage workflows, and investigation tools.Implement and refine internal AI agents and security bots that facilitate monitoring, investigations, reporting, and other security operations tasks.Develop and manage systems and workflows that support our bug bounty and vulnerability disclosure program, covering intake, triage, prioritization, and remediation tracking.Collaborate with product and engineering teams to perform threat modeling on new features and systems, propose mitigations, and integrate security guardrails into designs and implementations.Contribute to secure-by-default libraries, services, and patterns that empower teams to build secure features effortlessly.Integrate security signals from cloud services, endpoints, SaaS, and applications into unified pipelines and data models that bolster detection and analysis.Automate processes to minimize manual effort in incident response, containment, and remediation.Work closely with security engineers and fellow software engineers to review designs and code, continuously enhancing our security tools and platforms.QualificationsA minimum of 4 years of experience as a software engineer, particularly in developing security-related tools, platforms, or automation, or in a security engineering role with a strong emphasis on software development.Proficiency in at least one major programming language (e.g., Python, Go, or TypeScript) with experience in building production services, command-line interfaces, or internal tools.Experience with integration of security-relevant systems such as logging pipelines, SIEMs, EDR, cloud APIs, or identity platforms.Hands-on experience in threat modeling, secure design, or conducting application security reviews for services or features.Experience in operating or contributing to bug bounty or vulnerability management programs is a plus.

Join Cloudflare as a Senior Software Engineer specializing in Storage Infrastructure, where you will play a pivotal role in designing and developing high-performance storage systems. Collaborate with a dynamic team dedicated to enhancing our infrastructure and ensuring the reliability of our services.

Join Cloudflare as a Senior Software Engineer specializing in Network Performance & Reliability! In this role, you'll be at the forefront of enhancing the performance and stability of our global network, ensuring our customers benefit from unparalleled speed and reliability. You'll collaborate with experts across various teams to design and implement innovative solutions that optimize network operations.

Join Cloudflare as a Principal Software Engineer, where you will play a pivotal role in designing and implementing innovative software solutions. You will collaborate with cross-functional teams to enhance our platform's scalability, security, and performance, making a significant impact on our global user base.

Join Cloudflare as a Senior Infrastructure Tooling Software Engineer and play a pivotal role in enhancing our infrastructure capabilities. In this hybrid position, you will collaborate with cross-functional teams to develop innovative tooling solutions that streamline processes and improve operational efficiency. Your expertise will help us maintain our commitment to delivering fast and secure internet experiences.

Join Cloudflare as a Software Engineer - Registrar and play a pivotal role in enhancing our global internet security infrastructure. In this dynamic position, you will collaborate with cross-functional teams to design, develop, and maintain robust software solutions that ensure efficient domain registration processes. You will be empowered to innovate and implement cutting-edge technologies that enhance user experience and security.

Join Cloudflare as a Software Engineer in our innovative Cloudforce One team. In this dynamic role, you will be responsible for developing and enhancing cutting-edge cloud solutions that protect and accelerate the web.As a key member of our engineering team, you will collaborate with cross-functional teams to design, implement, and optimize software systems. Your contributions will directly impact the performance and security of our services.