Software Engineer II - Partner Identity & Access Management - ABU
Booking.comResponsibilities
- Build, operate, and evolve backend authentication services, including their APIs, data models, caching, consistency behavior, and failure handling.
- Design and execute phased authentication migration workstreams from the legacy Perl stack to Auth0, including coexistence, dual-write, reconciliation, staged rollout, and rollback strategies.
- Read, debug, and safely modify long-lived Perl services carrying live production authentication traffic.
- Configure and extend Auth0 authentication and authorization behavior, including tenants, applications, custom pipeline logic, connections, directories, tokens, and sessions.
- Investigate login-path incidents and anomalies across services, identity providers, edge infrastructure, and partner integrations, driving issues to root cause.
- Instrument authentication flows, define login-health metrics, and run controlled experiments on real traffic.
- Support internal engineers and downstream consumers through technical guidance, design reviews, integration support, and identity-domain education.
- Participate in on-call for services with direct partner-visible impact.
Requirements
- Professional backend engineering experience building and operating production services at scale in Java and Perl.
- Hands-on experience delivering customer identity and access management for external, non-employee populations.
- Practical, in-depth production experience with Auth0, including configuration, custom authentication logic, connection and user-store strategy, token design, and session design.
- Experience migrating authentication from an incumbent system to a new identity provider on live traffic, including user or credential migration, staged rollout, coexistence, and rollback.
- Experience working productively in large legacy codebases; working knowledge of Perl is required.
- Strong debugging-level knowledge of OAuth 2.0, OpenID Connect, JWT, and session management.
- Production cloud-service ownership experience covering deployment, observability, alerting, and incident response.
- Ability to independently investigate production problems spanning multiple systems and organizational boundaries.
- Clear written and spoken English, including incident reports, design documents, and explanations of identity concepts.
- Preferred experience with controlled experimentation on authentication or funnel-critical paths.
- Preferred familiarity with bot, automation, and abuse traffic affecting login endpoints and success metrics.
- Preferred experience with mobile authentication, including native app OIDC flows, token lifecycles, biometric credentials, or device-bound credentials.
- Preferred exposure to AI-assisted engineering workflows and agentic software-development tooling.
- Preferred experience with machine-to-machine and API authentication for third-party integrators.
Benefits
- Annual paid time off and generous paid leave, including parent, grandparent, bereavement, and care leave.
- Hybrid work with flexible arrangements and up to 20 days per year working from abroad in the home country.
- Industry-leading Booking.com product discounts of up to 1400 per year, including automatic Genius Level 3 status and Booking.com wallet credit.
- Relocation support is not provided for this role.
- Successful applicants may undergo applicable third-party pre-employment screening.
About Booking.com
A career at Booking.com is all about the journey, helping you explore new challenges in a place where you can be your best self. With plenty of exciting twists, turns and opportunities along the way. We’ve always been pioneers, on a mission to shape the future of travel through cutting edge technology, to make it easier for everyone to enjoy amazing experiences wherever they go. Under a desert sky, or in the heart of a bustling city. Discovering the perfect hideaway, or the perfect paella. When you join us, you’ll be part of a community where taking a different path and trying something new is celebrated and supported. And where making a difference counts. We’re determined to make the world of travel more sustainable, more accessible, and more inclusive, to create a positive impact on a global scale. That’s why we’re always looking for people who search for better solutions, the ones eager to stray off the beaten path to find new ways of doing things. Because at Booking.com it’s more than a job, it’s a journey we’re on together.