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.

• 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.

• Showcase any Rust projects that interact with Windows APIs; a short demo or repo link demonstrates real‑world competence.
• Highlight experience with TPM, Secure Boot or Credential Guard in your résumé; these are core to the role.
• Prepare to discuss a security vulnerability you fixed, focusing on the discovery, root‑cause analysis, and remediation steps.
• During interviews, be ready to write a small FFI bridge between Rust and C#; practice safe pointer handling.
• Emphasize clear communication by summarizing complex security concepts in plain language; interviewers value this skill.
• Research 1Password’s recent security blog posts to reference specific product features you’re excited to work on.
• When negotiating, consider the equity component and remote‑work stipend as part of the total compensation package.