Software Development Engineer III (.NET Full Stack)

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success.

Why Join Us?

To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win.

We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us.

Introduction to team

• Own end‑to‑end delivery and domain modeling of feature epics across domains — translating business outcomes into technical milestones validated via instrumentation. Design domain‑driven GraphQL/REST APIs with clear boundaries, leverage event streaming for efficiency, and ensure scalable evolution.

• Architect React app structure (routing, state, data, error boundaries) enabling intuitive reservation, availability, payment, and guest management flows

• Design GraphQL schemas (federation, pagination, versioning) + REST fallbacks rooted in domain‑driven boundaries; evolve schemas to support search optimization & workflow orchestration

• Build Node.js BFF & Kotlin services for property management, payment processing, search relevance, guest lifecycle, and efficiency features leveraging event streaming where valuable

• Collaborate with product & design on roadmap sizing, sequencing, and MVP scoping

• Implement API + data changes enabling new UI capabilities (validation, lifecycle state transitions, reporting)

• Design & implement migrations (.NET Framework 4.8 → .NET 8 minimal APIs / ASP.NET Core)

• Lead design reviews; produce ADRs clarifying trade‑offs

• Elevate testing strategy (contract, integration, perf, load)

• Automate observability (structured logging, tracing, metrics, dashboards)

• Mentor SDE I/II engineers (pairing, scoped delegation, review coaching)

• Guide containerization & AWS deployment (ECS/Fargate, selective Lambda)

• Partner with product managers to define KPIs (conversion, booking modification success, statement generation time)

• Evaluate build vs reuse vs buy options for new functionality; articulate trade‑offs

Minimum Qualifications:

• 5+ years professional C#/.NET

• CLR internals understanding (memory, threading, async, GC basics)

• Advanced SQL Server (query tuning, indexing, transactions)

• Hands‑on API design (REST standards, error models, pagination, versioning)

• Architectural patterns (DDD, layered, event‑driven)

• Effective written & verbal technical communication

• Proven mentorship improving code quality norms

Additional Qualifications:

• .NET 6/8 performance features (Span, source generators, minimal APIs)

• gRPC service & streaming design

• REST API development (Node / Java / Kotlin), exposure to GraphQL preferred

• Strong JavaScript & TypeScript fundamentals (ES2022+, types, generics)

• AWS (ECS, RDS/Aurora, CloudWatch, SQS/SNS, API Gateway) / Azure equivalents

• IaC (Terraform, CDK, CloudFormation)

• Kafka/event streaming; eventual consistency patterns

• Performance/load testing (BenchmarkDotNet, k6, JMeter)

• Security practices (OWASP Top 10, threat modeling, secret rotation)

• Container build optimization (Docker multi‑stage, caching)

• Cross‑stack familiarity: React, Node.js, GraphQL, Elastic Search, MongoDB, Dropwizard/Kotlin services enabling full‑stack collaboration

Accommodation requests

If you need assistance with any part of the application or recruiting process due to a disability, or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team through the Accommodation Request.

We are proud to be named as a Best Place to Work on Glassdoor in 2024 and be recognized for award-winning culture by organizations like Forbes, TIME, Disability:IN, and others.

Expedia Group's family of brands includes: Brand Expedia®, Hotels.com®, Expedia® Partner Solutions, Vrbo®, trivago®, Orbitz®, Travelocity®, Hotwire®, Wotif®, ebookers®, CheapTickets®, Expedia Group™ Media Solutions, Expedia Local Expert®, CarRentals.com™, and Expedia Cruises™. © 2024 Expedia, Inc. All rights reserved. Trademarks and logos are the property of their respective owners. CST: 2029030-50

Employment opportunities and job offers at Expedia Group will always come from Expedia Group’s Talent Acquisition and hiring teams. Never provide sensitive, personal information to someone unless you’re confident who the recipient is. Expedia Group does not extend job offers via email or any other messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official website to find and apply for job openings at Expedia Group is careers.expediagroup.com/jobs.