Software Development Engineer III - Test

Summary

Join OpenX as a Software Development Engineer in Test (SDET) and contribute to the launch of a new product within our platform. You will be part of a talented, remote-first US team, building self-service tools to simplify complex workflows for media activation. The team is responsible for delivering a new product to help users plan, manage, and optimize campaign outcomes more effectively. You will build and maintain scalable test automation frameworks, develop comprehensive automation strategies, and own end-to-end validation for key features. Collaboration with backend, frontend, and data science teams is crucial. Continuous improvement of coverage, test data strategies, and test suite performance is expected.

Requirements

• 5+ years of experience in software test automation, with a strong track record of building and maintaining scalable test frameworks for backend APIs and user-facing applications
• Proficiency in Python and JavaScript/TypeScript, with the ability to write clean, modular, and testable code
• Hands-on experience with CI/CD tools such as Google Cloud Build, Spinnaker, or equivalent, including maintaining and improving test pipelines
• Deep understanding of modern testing strategies, including integration, end-to-end, and regression testing in distributed systems
• Strong debugging and root cause analysis skills, with the ability to triage and resolve issues across complex service and interface boundaries
• Hands-on experience with modern test frameworks such as pytest, Cypress, Playwright, or Go-based tools
• Familiarity with TestOps and DevOps practices, including test observability, parallel execution, and test data strategy
• Excellent collaboration and communication skills, with a focus on engineering excellence and continuous improvement

Responsibilities

• Build and maintain scalable test automation frameworks that ensure reliability across APIs and user interfaces in a 0→1 product environment
• Develop comprehensive automation strategies to validate AI-driven media activation
• Own end-to-end validation for key features, driving test strategy, implementation, execution, and deployment readiness
• Work closely with backend, frontend, and data science teams to align on testability, coverage gaps, and quality goals throughout the development cycle
• Investigate failures, perform root cause analysis, and continuously improve coverage, test data strategies, and test suite performance
• Promote engineering excellence through constructive code reviews, mentoring, and driving improvements in code quality, architecture, and platform best practices

Preferred Qualifications

• Experience working on SaaS platforms with multi-step workflows, complex data models, or user-facing configuration tools
• Experience in digital media, marketing technology, or advertising technology
• Experience working in cloud-native environments using Kubernetes, Docker, and CI/CD pipelines
• Experience testing UI flows or frontend systems built with component libraries or GraphQL APIs
• Familiarity with AI-assisted development tools like Cursor and GitHub Copilot

Benefits

• Medical
• Dental
• Vision
• 401k
• Equity