Browser Security Engineer

📋 Description

• • As Comet continues its rapid growth as a distinct product and codebase, we are seeking a highly skilled and motivated Browser Security Engineer to spearhead and take ownership of critical browser-specific security initiatives. This pivotal role will involve deep engagement with custom Chromium development, ensuring the robust security of our browser extensions, and architecting secure cross-device features that define the next generation of user experience.
• • Browser security is paramount, encompassing a wide spectrum of threats and vulnerabilities, from sophisticated Cross-Site Scripting (XSS) attacks to intricate Same-Origin Policy (SOP) bypasses. Your expertise will be instrumental in fortifying our browser against these evolving dangers, ensuring the integrity and safety of user data and interactions.
• • The Comet product distinguishes itself through substantial custom engineering efforts. This includes our proprietary Chromium fork, which requires a nuanced understanding of its unique security landscape, our custom-built browser extensions that extend functionality and require rigorous security vetting, and the development of secure synchronization features that seamlessly connect user experiences across multiple devices. Your role will be central to safeguarding these complex components.
• • In an environment of increasing product complexity, having a dedicated security engineer embedded directly within the product team is crucial. This proactive partnership will enable us to identify and address potential security concerns at the earliest stages, significantly mitigating risks before they are exposed during red-teaming exercises or external audits. Your presence will foster a security-first mindset throughout the development lifecycle.
• • Your primary responsibilities will include leading comprehensive threat modeling exercises and conducting in-depth security architecture reviews for all browser-facing surfaces of the Comet product. This involves a deep dive into the design and implementation of features to identify potential weaknesses and ensure adherence to security best practices.
• • You will collaborate closely and continuously with our product management and engineering teams. This partnership is essential for proactively identifying and mitigating browser vulnerabilities, with a particular focus on issues inherent to custom Chrome engineering and the intricate architecture of browser extensions. Your insights will guide development towards more secure solutions.
• • A key aspect of your role will be to develop, disseminate, and champion security best practices, create essential security tooling, and provide clear, actionable documentation for all engineers involved in building browser-facing features. This will empower the broader team to integrate security seamlessly into their workflows.
• • You will serve as the go-to security expert for a range of critical topics. This includes, but is not limited to, a deep understanding of Same-Origin Policy (SOP) intricacies, effective prevention and mitigation strategies for XSS, the principles and application of browser sandboxing, the nuances of browser extension permissions and their security implications, and the design of secure inter-device communication protocols.
• • You will be responsible for triaging and resolving security vulnerabilities discovered by external researchers, including those reported through our bug bounty program and by our red-teaming partners. Furthermore, you will engage with the broader Chromium security community, contributing to the collective effort of securing the browser ecosystem.
• • Building and maintaining strong, collaborative relationships with internal and external security partners will be vital. You will leverage their feedback, insights, and expertise to drive continuous improvement in our security posture and practices.
• • Staying abreast of the latest developments in browser security is non-negotiable. This includes continuously monitoring emerging browser security threats, evaluating new security tools and technologies, and understanding evolving industry trends and best practices to ensure our defenses remain cutting-edge.
• • This role offers a unique opportunity to shape the security strategy for a next-generation browser product from its foundational stages. You will tackle challenging and impactful problems at the dynamic intersection of custom Chromium engineering, browser extension security, and mobile security. You will collaborate with some of the brightest engineers in the industry within an environment that places a premium on both security and product excellence, fostering innovation and a culture of continuous learning and improvement.