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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Development Engineer II - Identity Authentication Services - **Company:** Expedia Inc. - **Location:** Austin, TX, United States - **Experience:** Experienced - **Salary:** $119,000.0 - $166,500.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, User Authentication, Automation of Tests, Static Program Analysis, Code Generation, Code Review, Fraud Prevention and Detection, Identity and Access Management, Machine Learning, OAuth, Performance Tuning, Openid Connect, Security Assertion Markup Language (SAML), Secure Coding, Service-Oriented Architecture, Session Management, Software Engineering, Systems Integration, Web Services, Data Logging, Caching, Backend, Information Technology, Low Latency, Api Design, Programming Languages - **Published:** September 18, 2026 - **Apply:** https://www.dice.com/job-detail/cffdff85-4db4-4136-b809-2b78bf53dfd9 ## About the Role * 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. ## Description 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. In this role, you will: * 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. ## Related Videos - [Keeping applications secure by evolving OAuth 2.0 and OpenID Connect](https://www.wearedevelopers.com/videos/100152-keeping-applications-secure-by-evolving-oauth-2-0-and-openid-connect) - [No More Post-its: Boost your login security with APIs](https://www.wearedevelopers.com/videos/1043-no-more-post-its-boost-your-login-security-with-apis) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [HTTP headers that make your website go faster](https://www.wearedevelopers.com/videos/1676-http-headers-that-make-your-website-go-faster) - [Delay the AI Overlords: How OAuth and OpenFGA Can Keep Your AI Agents from Going Rogue](https://www.wearedevelopers.com/videos/1637-delay-the-ai-overlords-how-oauth-and-openfga-can-keep-your-ai-agents-from-going-rogue) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [Why Attend a Developer Event in 2026?](https://www.wearedevelopers.com/magazine/688-why-attend-a-developer-event-in-2026) - [The 12 Best Jobs for Software Engineers](https://www.wearedevelopers.com/magazine/401-the-12-best-jobs-for-software-engineers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)