Software Development Engineer in Test (SDET) – ML & LLM Systems

Responsibilities

• Design, develop, and maintain robust automated test code and frameworks for ML models, NLP systems, and backend services
• Perform model validation and verification, including accuracy benchmarking, regression testing, drift detection, and reproducibility checks
• Develop automated validation pipelines for data ingestion, quality checks, schema validation, and anomaly detection
• Partner with product owners and engineers to define automation strategies and technical quality requirements
• Investigate failing tests, diagnose root causes, and implement fixes to improve system stability
• Coordinate QA and production build deployments in collaboration with engineering and infrastructure teams

Requirements

• 2+ years of industry experience as a Software Development Engineer in Test (SDET)
• Strong coding skills in Java, Spring Boot, and Python
• Hands-on experience testing Machine Learning models, NLP services, and Large Language Models (LLMs)
• Proficiency with API testing and RESTful APIs
• Experience with Linux environments and container technologies like Docker and Kubernetes
• Experience building or working with CI/CD pipelines using tools such as Jenkins
• Working knowledge of AWS services (including S3) and NoSQL databases like MongoDB

Benefits

• Medical and Dental insurance
• 401(k) Savings Plan
• Generous paid time off
• Life Milestones support including adoption assistance and childcare resources
• Courtesy services including free digital TV and internet in serviceable areas
• Discount tickets for Universal Resorts

About the Company

Comcast is a Fortune 30 global media and technology company that reaches hundreds of millions of customers, viewers, and guests worldwide through connectivity, platforms, and content.