Senior Developer (Windows), Product Security

1Password is growing. We’ve surpassed $400M in ARR and we’re continuing to accelerate, earning a spot on the Forbes Cloud 100 for four years in a row and teaming up with iconic partners like Oracle Red Bull Racing. About 1Password At 1Password, we’re building the foundation for a safe, productive digital future. Our mission is to unleash employee productivity without compromising security by ensuring every identity is authentic, every application sign-in is secure, and every device is trusted. We innovated the market-leading enterprise password manager and pioneered Unified Access Management, a new cybersecurity category built for the way people and AI agents work today. As one of the most loved brands in cybersecurity, we take a human-centric approach in everything from product strategy to user experience. Over 180,000 businesses, from Fortune 100 leaders to the world’s most innovative AI companies, trust 1Password to help their teams securely adopt the SaaS and AI tools they need to do their best work. If you're excited about the opportunity to contribute to the digital safety of millions, to work alongside a team of curious, driven individuals, and to solve hard problems in a fast-paced, dynamic environment, then we want to hear from you. Come join us and help shape a safer, simpler digital future. Security and data privacy are at the core of everything we do at 1Password. The Product Security Team is responsible for implementing new security features across our macOS, iOS, Android, Windows, Linux and Web applications as well as building libraries to share common security-critical code, resolving security vulnerabilities across our applications, and promoting secure coding practices across the organization. As a Senior Developer on our Device Security squad, you will play a key role in implementing the next generation of security features in our applications, and help shape our security operations and best practices. You'll be intimately involved in ensuring secure coding practices across our code-base, guiding product teams on best practices, resolving security vulnerabilities in our products when they arise, and demonstrating leadership in the area of secure coding and development. How we’re using AI today Our Engineering, Product, and Design teams are thoughtfully integrating AI across the full software and product development lifecycle to move faster without sacrificing quality or security. In practice, that looks like engineers using AI-assisted coding tools to accelerate reviews and catch bugs earlier, product managers synthesizing user research at scale, and designers rapidly prototyping and iterating with AI-generated mockups. We approach AI the same way we approach security: with clear principles, human accountability at every consequential decision point, and rigorous evaluation before anything ships to customers. This is a remote opportunity within Canada and the US. What we're looking for: 4+ years of experience in software development with a security angle; development experience with modern encryption techniques and libraries or authentication protocols 4+ years of hands-on experience with Windows security development with technical expertise in languages such as Rust, C#, C/C++, Go or TypeScript Experience with Rust development and creating FFI interfaces, especially for Windows. Knowledge of Windows OS architecture and platform-specific optimization techniques Familiarity with TPM and HSM functionality with proven experience in Windows security features such as Windows Hello, BitLocker, Secure Boot, and Credential Guard A strong understanding of and passion for the security domain; that could include understanding of topics in the sub-domains of cryptography, network security, application security, common threat vectors, and access control mechanisms etc. Excellent written and verbal communication skills; our security team often communicates nuanced topics to a variety of internal audiences, and has to understand these nuances during the design phase You’re a self starter with strong organizational skills who enjoys solving moderately complex problems with a demonstrated ability to tackle problems and propose effective solutions Knowledge of and practical experience with Agentic AI Model capabilities and workflows Bonus points: Experience with SAML, OAuth and OpenID Connect Experience working on a SaaS product Leadership experience as a software developer in a team environment Experience with GitHub or GitLab as well as CI/CD pipelines Experience with system analysis and performance monitoring tools such as DataDog, SemGrep, Sonarqube, Fortify etc. Personal experience using 1Password What you can expect: Work within a small team of developers who are specialists in Rust, Go, Swift, and Security Development Implement new security features for the next generation of 1Password and develop secure libraries to share common security-critical code across our applications Assist in security design efforts or scoping initiatives for new features by identifying major tasks and breaking down, estimating, and planning work Demonstrate leadership in security development and act as a trusted point of contact for management and other developers Code, test, debug, deliver and maintain production software systems for new and existing product features Collaborate with a variety of teams across our hybrid core architecture from Design to QA, as well as security engineering for design guidance and secure coding practices Work with your teammates to communicate technical requirements to stakeholders and solve technical problems in a scalable and realistic way Mentor junior and new team members by helping them understand team expectations, providing technical guidance, sharing knowledge, and engaging in pair programming sessions Review code for others to maintain high code quality, knowledge share within the team, and support creating a safe environment of giving and receiving feedback Stay informed about the latest industry trends, technologies, and best practices in security development USA-based roles only: The annual base salary for this role is between $153,000 USD and $214,000 USD, plus immediate participation in 1Password's benefits program (health, dental, 401k and many others), utilization of our generous paid time off, an equity grant and, where applicable, participation in our incentive programs. Canada-based roles only: The annual base salary for this role is between $144,000 CAD and $202,000 CAD, plus immediate participation in 1Password’s generous benefits program (health, dental, RRSP and many others), utilization of our generous paid time off, an equity grant and, where applicable, participation in our incentive programs. At 1Password, we approach each individual's compensation with a promise of fair market value and internal equity commensurate with experience and specific skill set. This posting is for an existing vacancy. Our culture At 1Password, we prioritize collaboration, clear and transparent communication, receptiveness to feedback, and alignment with our core values: keep it simple, lead with honesty, and put people first. You’ll be part of a team that challenges the status quo, and is excited to experiment and iterate in search of the best solution. That said, 1Password is not for everyone . Our work is demanding, we strive for excellence, and the pace is fast. We need people who are keen to take on challenging problems, who seek feedback to grow, and who are driven to make an impact. If you're looking for a place where you can settle into a comfortable routine, this might not be the right fit for you. We’re looking for individuals who are proven experts in their fields, as well as those who are highly adaptable, can thrive in ambiguity and through change, are curious, and above all deliver results. How we work with AI We are committed to leveraging cutting-edge technology—including AI—to achieve our mission. We also underst