SDET – AI/LLM & API Testing for Distributed Systems

PlayStation; Aliso Viejo (CA); On-site; USD 80,000 - 99,000; Full time

Job summary

Sony Interactive Entertainment (SIE) is seeking an experienced Software Development Engineer in Test (SDET) to enhance quality across Agentic AI systems and backend services. You will design automated testing strategies for AI/LLM-driven applications, APIs, and distributed services, working with cross-functional teams to drive quality from development through release.

You will develop test frameworks for API and end-to-end testing, validate AI outputs, and implement risk-based testing to ensure

Qualifications

• Bachelor's degree in Computer Science, Engineering, Information Technology, or a related field, or equivalent practical experience.
• 4+ years of experience in Software Development Engineering in Test, Quality Engineering, Software Engineering, or a related discipline.
• Strong experience testing REST APIs, backend services, microservices, or distributed systems.
• Hands-on experience developing automated tests using Python, Java, JavaScript, TypeScript, or a similar programming language.
• Experience with functional, integration, regression, contract, and end-to-end testing.
• Experience integrating automated tests into CI/CD pipelines.
• Strong analytical, debugging, and root-cause-analysis skills.
• Experience working in an Agile development environment and collaborating across engineering teams.

Responsibilities

• Develop and execute comprehensive QE strategies and test plans for Agentic AI systems, backend services, APIs, and service integrations.
• Design and maintain scalable automated test frameworks across API, functional, integration, contract, regression, and end-to-end testing.
• Develop testing approaches for non-deterministic AI behavior and establish meaningful evaluation criteria.
• Identify quality risks early and apply risk-based, shift-left testing practices throughout the development lifecycle.
• Integrate automated testing into CI/CD pipelines and establish effective quality gates.
• Partner with Software Engineers, Product Managers, and other QE teams to improve testability, observability, and overall product quality.
• Analyze defects and production issues to identify root causes, testing gaps, and opportunities for continuous QE improvement.
• Establish quality metrics and provide visibility into test coverage, reliability, defects, and release readiness.

Skills

Quality Assurance

REST API testing

Automated testing

Python

Java

CI/CD

Agile

Education

Bachelor's degree in CS/Engineering/IT or related

Tools

Git

OpenAPI/Swagger

Docker

Kubernetes

Job description

Sony Interactive Entertainment (SIE) is seeking an experienced Software Development Engineer in Test (SDET) to enhance quality across Agentic AI systems and backend services. You will design automated testing strategies for AI/LLM-driven applications, APIs, and distributed services, working with cross-functional teams to drive quality from development through release.

You will develop test frameworks for API and end-to-end testing, validate AI outputs, and implement risk-based testing to ensure