✦ Luna Orbit — AI & Machine Learning

Software Development Engineer III - Back End, GenAI Platform

at Expedia Group

📍 USA - Illinois - Chicago Unknown 💰 $136K – $190K USD / year Posted March 28, 2026
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Position Details

Salary $136K – $190K USD / year
Type Full-Time
Experience lead
Exp. Years 5+ years
Education Not specified
Category AI & Machine Learning

About this role

This role involves designing and delivering backend AI services for Expedia's GenAI platform, focusing on scalability, security, and observability, with leadership responsibilities.

Key Responsibilities

  • Design backend services
  • Lead AI projects
  • Mentor engineers
  • Implement security guardrails
  • Ensure platform observability

Technical Overview

The position requires expertise in Python, FastAPI, Elasticsearch, PostgreSQL, system design, data modeling, and AI/ML systems, with a focus on leading project delivery and mentoring.

Ideal Candidate

The ideal candidate is a senior AI engineer with leadership experience, 5+ years in backend development, API design, and machine learning, with expertise in Elasticsearch and PostgreSQL, capable of mentoring teams and leading projects.

Must-Have Skills

Design and deliver backend services in Python and FastAPIExperience with API design and system architectureKnowledge of data modeling and machine learningExperience with Elasticsearch and PostgreSQLImplementing securitymonitoringand observability featuresLeading projects and mentoring junior engineers

Nice-to-Have Skills

GuardrailsSafety featuresOn-call experienceDistributed systemsAI/ML systems

Tools & Platforms

PythonFastAPIElasticsearchPostgreSQLCI/CD pipelines

Required Skills

PythonFastAPIAPIssystem designdata modelingmachine learningLLMElasticsearchPostgreSQLAPI securitymonitoringalertingCI/CD

Hard Skills

PythonFastAPIAPIsSystem designData modelingMachine learningLLMElasticsearchPostgreSQLAPI securityMonitoringAlertingCI/CD

Soft Skills

LeadershipMentoringProblem-solvingCommunicationTeamwork

Industry & Role

Industry Technology / SaaS
Job Function Leading backend development for AI platform
Role Subtype AI Lead Engineer
Tech Domains Python, FastAPI, Elasticsearch, PostgreSQL

Keywords for Your Resume

lead software engineergenai platformpythonfastapiapi designsystem architecturedata modelingmachine learningllmelasticsearchpostgresqlsecuritymonitoringalertingci/cd pipelines

Deal Breakers

Lack of experience in backend API development, No leadership or mentoring experience, No experience with Elasticsearch or PostgreSQL, No knowledge of AI/ML systems

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