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About the Role

The Identity Authentication Services team owns and develops the backend authentication APIs and services used across Expedia Group’s many brands. As the front line of our Tier 0 platform, these services enable travelers and partners to authenticate securely and seamlessly at scale. As a Software Development Engineer II, you will help build and evolve scalable features while maintaining the exceptional availability, reliability, and low latency expected of a high-traffic authentication platform.

Responsibilities

Design, develop, and maintain authentication and authorization services that are reliable, secure, and performant for large-scale customer and partner-facing applications.
Implement APIs, data models, and low-level designs that support identity, session management, and policy enforcement workflows across multiple products and platforms.
Collaborate with product, security, and engineering teams to translate authentication and access control requirements into technical solutions and deliver features end to end.
Own the quality, observability, and support for the services you build, including automated testing, monitoring, logging, and on-call participation for production systems.
Apply secure coding practices, threat-aware design, and familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products to continually strengthen authentication capabilities.
Contribute to technical documentation, code reviews, and knowledge sharing to enable fungibility across services and domains related to identity and access management.

Requirements

Bachelor’s degree in Computer Science or a related technical field; or Equivalent related professional experience.
2+ years of relevant professional experience.
Professional software development experience working on backend or distributed services, including ownership of at least one production service or component.
Proficiency in at least one modern programming language and experience with service-oriented architecture, including API design, data modeling, and low-level system design.
Experience building, integrating, or maintaining authentication, authorization, or identity-related capabilities such as login, tokens, or session management in a production environment.
Experience designing and operating highly available authentication or identity services at scale, including performance optimization, caching strategies, and resiliency patterns.
Hands-on experience with modern identity and access management standards or systems (for example, OAuth, OpenID Connect, SAML, or similar) and their integration into large applications.
Demonstrated ability to drive improvements in service reliability, security, and observability, including use of metrics, logs, and traces to make data-driven decisions.
Safely integrates and operates AI/ML‑enabled solutions that improve outcomes, for example by enhancing fraud detection, risk-based authentication, or anomaly detection in sign-in flows.
Experience applying AI-assisted development or analysis tools (such as code generation, static analysis, or traffic anomaly detection) to improve the quality and security of authentication services, including opportunities to incorporate AI into developer workflows.

Skills

API design
Data modeling
Low-level system design
Authentication
Authorization
Identity management
Login
Tokens
Session management
OAuth
OpenID Connect
SAML
Service-oriented architecture
AI/ML concepts
AI-assisted development
Code generation
Static analysis
Traffic anomaly detection

Location

Austin

Work Type

Full-time

Experience Level

2+ years of relevant professional experience
Software Development Engineer II

Education Level

Bachelor’s degree in Computer Science or a related technical field

Salary/Compensations

$119,000.00 to $166,500.00
Potential to increase pay up to $190,500.00 based on performance

Benefits

Medical coverage
Dental coverage
Vision coverage
Paid time off
Employee Assistance Program
Wellness reimbursement
Travel reimbursement
Travel discounts
International Airlines Travel Agent Network (IATAN) membership

About the Company

Expedia Group helps travelers explore the world, one journey at a time.
A global travel company powered by passionate people, trusted partnerships, and leading technology.
Connects travelers, partners, and advertisers through consumer brands, B2B network, and travel advertising business.
Expedia Group includes three flagship consumer brands - Expedia, Hotels.com, and Vrbo - along with a leading B2B travel business and travel advertising offerings.
Across our brands and business, we help travelers explore the world with confidence and ease.

Equal Opportunity

Expedia is committed to creating an inclusive work environment with a diverse workforce.
All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law.
This employer participates in E-Verify.
The employer will provide the Social Security Administration (SSA) and, if necessary, the Department of Homeland Security (DHS) with information from each new employee's I-9 to confirm work authorization.