Senior Software Engineer, ISF

Box•Redwood City, CA

14d•$198,500 - $248,000•Hybrid

About The Position

The Identity and Security Foundation (ISF) team serves as the gatekeeper to Box. Every request to access Box services must be authenticated through one of the systems we manage. We own the authentication experience across Box - including web, API, service-to-service, and SSO; and architect, build, and operate the foundational identity infrastructure that underpins Box’s security. As Box evolves into an AI-powered content platform, ISF is at the forefront of securing the next generation of intelligent experiences. We are extending our identity and access foundations to support AI services, enabling secure interactions between users, applications, and AI agents while protecting customer data and enabling trustworthy AI adoption at scale. Whether we're scaling systems to handle billions of requests per day, building seamless and secure authentication experiences, reimagining identity for a multi-device world, or creating secure foundations for AI-driven workflows, we enable Box to grow rapidly and securely. The modern, secure, and reliable services and frameworks we build are foundational to realizing Box’s ambitious vision.

Requirements

5+ years of software engineering experience, with a degree in Computer Science, a related field, or equivalent experience.
Strong understanding of modern authentication and authorization technologies, including MFA, SSO, OAuth 2.0, JWTs, token management, scopes, and permissions.
Experience designing, building, and operating secure, production-grade services and RESTful APIs using microservices architectures.
Strong Java proficiency and working knowledge of PHP.
Strong understanding of security best practices and the ability to design systems that balance security, performance, reliability, and user experience.
Ability to translate product and business requirements into scalable, secure technical designs.
Experience collaborating effectively with engineering and business leaders across teams and disciplines.

Nice To Haves

You have implemented solutions based on Box APIs
You have led or contributed to open source projects
You contribute to developer communities such as Stack Overflow or GitHub

Responsibilities

Design, develop, and maintain secure, scalable authentication and authorization systems using technologies such as Java, PHP, Docker, and Kubernetes.
Build and operate high-quality microservices that power security capabilities including MFA, SSO, OAuth 2.0, OIDC, JWTs, token management, scopes, and permissions.
Provide technical guidance across multiple levels of architecture and mentor engineers on the team, helping raise the bar for engineering and security practices.
Influence and contribute to company-wide architectural decisions, bringing deep expertise in identity, authentication, authorization, and security to technical reviews.
Participate in our on-call rotation, available at all times while on-call to help respond to and triage any issues that arise.