Agentic AI Test Engineer

Job Summary

Job Description

We are seeking a AI Agentic Test Engineer to join our core automation team. This role is designed for a hands-on engineer who is passionate about the intersection of AI and Quality Engineering. You will focus on building automated evaluation loops for AI Agents using LLM-as-a-judge patterns and maintaining robust Web and API test suites. The ideal candidate is a Python expert who is also comfortable working across various modern tech stacks and CI/CD environments.

AI & Agent Evaluation (Primary Focus)

• LLM-as-a-Judge: Design and implement automated evaluation frameworks that utilize Large Language Models to assess the quality, accuracy, and safety of Agent responses.

• Agentic Testing: Perform hands-on validation of AI Agents within complex environments, moving beyond static assertions to intelligent, semantic validation.

• Data Validation: Automate the testing of real-time data streams and LLM outputs to ensure consistency and prevent regression in Agent behavior.

Full-Stack Automation & Coding

• Python Mastery: Expert in Python for building custom test utilities, framework extensions, and automation scripts.

• Cross-Functional Tooling: Develop and maintain automation across TypeScript, Java, and React environments to support various application layers.

• Web & API Automation: Build high-performance automated tests for modern web interfaces and RESTful APIs, ensuring end-to-end system reliability.

• Internal Tooling: Help build or maintain internal quality dashboards and tools using frameworks like Streamlit.

CI/CD & Technical Operations

• Pipeline Execution: Integrate automated tests into CI/CD pipelines (e.g., Jenkins, Concourse) to ensure continuous quality feedback throughout the development lifecycle.

• Code Quality: Actively participate in technical code reviews, focusing on script efficiency, maintainability, and clean code principles.

• Troubleshooting: Use logs and observability tools to perform deep-dive root cause analysis on automation failures and system defects.

What You’ll Need:  

• 5+ years of experience as an SDET or Automation Engineer.

• Strong technical background in building and maintaining custom automation frameworks.

• Ability to work independently on complex coding tasks while collaborating effectively in an Agile environment.

• Core Language: Expert-level hands-on coding in Python.

• AI/LLM Skills: Solid understanding of Agent Evaluation techniques and using LLMs as a judge.

• Automation Breadth: Proven experience in Web and API automation.

• Multi-Stack Knowledge (Good to Have):

  • Languages: TypeScript, Java.

  • Frameworks: React, Streamlit.

  • DevOps: CI/CD pipeline management (Jenkins/Concourse).

Disclaimer: This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications.

Comcast is an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.

Skills:

Agentic AI; Adaptability; Critical Thinking; Automation; AI Agents; Python (Programming Language); AI Agent Orchestration

Salary:

Primary Location Pay Range: $114,985.89 - $172,478.83

Comcast intends to offer the selected candidate base pay within this range, dependent on job-related, non-discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.

Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Comcast provides best-in-class Benefits to eligible employees. We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That’s why we provide an array of options, expert guidance and always-on tools, that are personalized to meet the needs of your reality - to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the compensation and benefits summary on our careers site for more details.

Education

Bachelor's Degree

While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience.

Relevant Work Experience

5-7 Years