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Photon

Builds custom software and AI for big companies

QA Engineer - Automation

Test Automation EngineeringConfirmed live in the last 24 hours
Full-timeUnited StatesIn-person

About the Job

Requirements

  • At least 10 years of experience in QA automation, with recent focus on AI/ML or large language model-based applications.
  • Expert-level Python skills and experience with testing frameworks such as Pytest.
  • Familiarity with AI evaluation frameworks such as LangSmith, DeepEval, RAGAS, or Promptfoo.
  • Deep experience with Playwright, Selenium, or Cypress for UI testing, with a strong focus on API-level testing and database validation.
  • Understanding that AI testing often requires scoring, such as measuring 85% accuracy, rather than binary pass/fail evaluation.
  • Ability to use SQL and JSON to validate data retrieved by agents during retrieval-augmented generation processes.

Responsibilities

  • Develop automation strategies for probabilistic outputs using model-based evaluation to test the tester.
  • Create and maintain golden datasets to benchmark agent performance across different versions of prompts and models.
  • Build automated tests to verify that agents call the correct functions or APIs with the right parameters in complex multi-step workflows.
  • Monitor how changes in prompt engineering or model updates affect product reliability.
  • Integrate performance testing into the CI/CD pipeline to track agent reasoning time and cost-efficiency.
  • Develop automated checks to identify and report AI hallucinations, bias, or jailbreak attempts.
  • Work closely with AI engineers to translate business requirements into measurable, automated test cases.

Desired Qualifications

  • Experience testing multi-agent systems, where one agent tests another.
  • Knowledge of prompt engineering and how it influences software behavior.
  • Background in investment banking or fintech to understand high-stakes data accuracy.

About the Company

Photon

Builds custom software and AI for big companies

Photon designs, builds, and runs custom software for large companies, combining an in-house creative agency with its own engineering teams. Its flagship client work includes rebuilding Samsung's US online store as a set of smaller linked services and creating Olive Garden's mobile app, which lets diners join the waitlist from their phones instead of waiting at the door. Clients hire Photon's teams to plan and code their apps, websites, and AI tools and to keep them running afterward, paying for the engineers and designers assigned to each project. Photon is privately held and based in London, with its US arm in Dallas and engineering centers in Chennai and Bengaluru.

Company size
5,001-10,000
Company stage
Not listed
Total funding
Not listed
Headquarters
London, United Kingdom
Founded
Not listed

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