Senior Engineer - Rust

WHAT YOU WILL DO Design, build, and maintain Bitwarden's implementation of the WebAuthn and FIDO2 standards in Rust, including credential creation, assertion, and storage within an end-to-end encrypted vault Integrate our passkey implementation with each platform's credential provider surface across browser, desktop, and mobile clients Participate in the hands-on design, development, and evolution of the shared Rust SDK, including language bindings and FFI, consumed across all Bitwarden clients Implement and help shape emerging standards for credential portability and secure import and export between providers Build the interoperability testing that keeps our implementation correct against the long tail of relying parties, browsers, and platforms our users encounter in the real world Become an expert on the Bitwarden APIs and the cryptographic and architectural constraints of a zero-knowledge product Participate in code reviews, learning, and spreading technical knowledge Independently plan, estimate, and deliver new feature work and bug fixes Occasionally review & approve bug fixes submitted by the user community WHAT YOU BRING TO BITWARDEN Expertise in developing and maintaining production Rust components, including the design and application of libraries, language bindings, and FFI Experience implementing a standard or protocol from its specification, and the discipline that requires — reading the spec closely, handling the edge cases, and testing against real-world implementations rather than assuming conformance Working knowledge of applied cryptography — you can reason about public key cryptography, signatures, and key handling, and you know where the sharp edges are A rigorous approach to correctness — you write readable, testable code, and you think carefully about failure modes in software that handles sensitive data Experience using AI tooling in your development and testing workflow (Anthropic Claude preferred) Experience with Electron, TypeScript, and other web tech for cross-platform desktop applications and web clients is a plus Collaborative and adaptable mindset Openness and authenticity combined with excellent communication skills Excitement and enthusiasm for open source and for better internet security Excellent problem-solving skills – you might not know all the answers, but you know how to find and communicate the solution Why Join Us This is an opportunity to play a foundational role in shaping our India Engineering COE from the ground up. Our user community loves us and we love them. Come to work each day with a sense of purpose as we bring a more secure internet experience to everyone from our friends and family to the world’s largest organizations. Become an expert. You’ll get immersed in the prominent technology markets of security and open source software. You'll work alongside talented global teams, solve meaningful engineering challenges, influence how we scale our engineering organization & contribute to products used by customers around the world. If you're passionate about building exceptional teams, enabling engineering excellence, and making a lasting impact within a fast-growing engineering company, we'd love to hear from you. Equal Opportunity Employer We are committed to fostering an inclusive workplace where everyone can do their best work. We welcome applicants from all backgrounds and make employment decisions based on skills, experience, qualifications, and business needs.