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Upstart Logo

Sr Software Engineer, Identity

Upstart

$215,100 - $237,700
Sep 22, 2025
Remote, US
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Upstart is looking to solve the problem of creating, securing, and managing borrower and partner identities to ensure a seamless and secure experience across their lending products, while also enabling frictionless, secure authentication and safeguarding sensitive data.

Requirements

  • 7+ years of experience developing large-scale distributed systems in the cloud (AWS, GCP, or Azure).
  • Strong proficiency in backend technologies (e.g., Kotlin, Java, Ruby, C).
  • Hands-on experience with authentication and authorization protocols (OAuth 2.0, OpenID Connect, SAML).
  • Experience building scalable APIs using containerization technologies like Docker and Kubernetes.
  • Understanding of security principles, including encryption, token-based authentication, and identity federation.
  • Strong problem-solving and debugging skills, with an emphasis on performance optimization.
  • Experience with AI Coding tools such as Cursor, Claude Code etc.

Responsibilities

  • Design, develop, and optimize secure and scalable authentication and authorization systems.
  • Collaborate with cross-functional teams to improve Identity and Access Management (IAM) capabilities, including OAuth, OpenID Connect, MFA, and SSO.
  • Partner with Security teams to enhance security policies and standards, ensuring protection against threats and unauthorized access.
  • Improve platform scalability by designing and implementing microservice based architectures.
  • Drive best engineering practices for clean, maintainable, and efficient code.
  • Participate in architectural discussions, helping to shape the long-term vision of Identity Platform.
  • Mentor and collaborate with other engineers to elevate the team’s technical skills and knowledge.

Other

  • Ability to balance the needs of the business with engineering best practices and security considerations.
  • Passion for clean code, architecture, and continuous improvement of engineering processes.
  • Excellent communication skills – able to translate complex technical concepts for a variety of stakeholders.
  • Proven ability to influence technical direction without direct authority.
  • Strong product and analytical mindset, capable of making trade-offs between risk, ROI, and performance.