About the role

Senior Software Developer focusing on security and authentication for Wealthsimple, Canada's largest fintech company. Enhancing user trust through reliable authentication systems across web and mobile platforms.

Responsibilities

Design and build security features that give clients control over how they access, move, and protect their money.
Improve reliability to support 99.99% uptime across web and mobile experiences.
Build and maintain authentication flows including passwordless login, push-based 2FA, and in-app verification prompts
Work closely with product, security, fraud, and infrastructure teams to balance client experience with account protection.
Prioritize delightful user experiences that minimize friction by adapting to risk signals without compromising security.
Design systems that recover gracefully from failures and provide clear feedback to clients.
Participate in on-call rotations for critical authentication infrastructure.

Experience building authentication or security features across web and mobile (iOS, Android, or React Native) at scale.
Strong frontend skills in React or similar frameworks, with an eye for building flows that are seamless without compromising security.
Familiarity with native device security APIs (biometrics, secure enclave, keychain, and credential storage).
Understanding of WebAuthn, passkeys, and browser-based authentication standards.
Comfort working across the stack—collaborating with backend teams on APIs while owning the client-side experience.
Track record of shipping features that balance security with usability.
Clear communication with technical and non-technical teams.
Not afraid of support work investigating and debugging individual client authentication issues.
Comfort with on-call duties for critical identity infrastructure.
Nice-to-have's:
Experience with fraud detection or risk-based authentication systems.
Background in financial services or regulated industries.
Experience with session management, rate limiting, and bot detection.
Experience building permissions or authorization systems (RBAC, ABAC, delegated access).
Understanding of Open Banking standards and third-party data sharing.

Top-tier health benefits and life insurance
Long-term group savings with employer match using our Wealthsimple for Business platform
20 vacation days + 4 wellness days per year, and unlimited sick and mental health days
90 days away program: Employees can work outside of Canada for up to 90 days per calendar year
A wide variety of peer and company-led Employee Resources Groups (e.g., Rainbow, Women of Wealthsimple, Black @ WS)