Senior Software Development Engineer, Full Stack

We’re looking for a Senior Software Engineer (Full-stack) to join a team focused on the Identity web and mobile app experience - the UI surfaces and front‑end systems behind login, sign‑up, account management, and cross‑brand navigation. You’ll join a team of talented front‑end and full‑stack engineers, set a high bar for UX, performance, accessibility, and reliability, and work closely with product, design, and backend/platform partners.

You will combine architecture, engineering quality, system design and connect the team’s work to business and traveler outcomes in line with EG’s values.

• Design, implement, and maintain robust, secure, and scalable services and applications, including low‑level system design (LLD), API design, and data modeling, to support business‑critical identity capabilities.
• Build scalable, reusable, and component‑driven web UI architectures using modern frameworks (React, Node.js, JavaScript/Type Script), integrating seamlessly with GraphQL APIs.
• Design, evolve, and maintain GraphQL schemas, and consume those schemas across web and mobile clients to support login, profile, and account experiences.
• Write clean, reliable, and well‑tested code using sound engineering principles, design patterns, and rigorous code review practices.
• Own end‑to‑end delivery of features and services, from technical design through deployment, monitoring, and iteration, ensuring high availability and operational excellence.
• Diagnose and resolve complex production issues, perform root‑cause analysis, and drive long‑term improvements in reliability, observability, and resilience.
• Collaborate closely with product, design, and partner engineering teams, contributing to discovery, backlog prioritization, and data‑driven decisions while ensuring solutions are reusable across domains.
• Apply AI‑enabled tools and workflows responsibly to improve development efficiency, reliability, and engineering outcomes.

• Bachelor’s degree in Computer Science or a related technical field, or equivalent professional experience.
• 10+ years of professional software engineering experience.
• Experience building and operating production services or applications, with clear ownership of features or systems.
• Proficiency in at least one modern programming language and strong fundamentals in data structures, algorithms, system design, and problem solving.
• Strong experience with GraphQL, including schema design, evolution, and client consumption.
• Experience owning the full software development lifecycle, including design, implementation, code reviews, testing, deployment, and monitoring.
• Full‑stack experience using JavaScript, Type Script, React, Java or Kotlin, and GraphQL.
• Experience maintaining production systems, including debugging, monitoring, and operational support.
• Experience designing APIs and building user‑facing applications consumed across teams or business units.
• Understanding of testing, observability, and monitoring tools (e.g., unit/integration testing frameworks, logging, metrics, alerting).
• Familiarity with AI‑assisted development tools and workflows.

• Ability to evaluate and select technologies while understanding trade‑offs between platforms and architectures.
• Experience working on consumer facing e‑commerce applications within Identity and Access Management domain.
• Developing mobile and cross‑platform identity experiences (web plus native apps) like deep linking, cross‑device login, SSO, and account linking.
• Experience integrating and operating AI‑or‑ML‑enabled solutions in the product or development lifecycle (for example, AI‑assisted testing, content, or personalization) with appropriate safeguards.
• Experience leading technical direction, and driving architecture decisions for distributed systems at scale.
• Deep understanding of app architecture patterns.
• Track record of improving operational excellence through observability, performance optimization, and resilient design for high‑traffic, customer‑facing applications.

The total cash range for this position in Seattle is $ to $. Employees in this role have the potential to increase their pay up to $, which is the…