Software Development Engineer in Test ( SDET) II

Poshmark is the leading fashion marketplace where style comes alive through discovery, self-expression, and human connection. Powered by a vibrant community of 165 million members, Poshmark brings real people and taste to shopping through a social experience shaped by shared discovery. Buying and selling fashion feels simple, joyful, and personal, while every item tells its own story. Poshmark empowers sellers to grow meaningful businesses, keeps fashion in circulation longer, and gives shoppers access to unique and trusted finds, from everyday pieces to one-of-a-kind vintage and luxury.

We are looking for a Software Development Engineer in Test II (SDET II) who will contribute to building and maintaining automation solutions that ensure high quality across Poshmark’s products and services. You will work closely with Engineering, Product, and QA teams to design and execute automated tests for web, mobile (iOS & Android), and APIs.

You will have a direct impact on product quality by expanding automation coverage, improving test reliability, and enabling faster and more confident releases through continuous testing practices.

• Design, develop, and maintain automated test scripts for web, mobile (iOS & Android), and API platforms.

• Contribute to existing automation frameworks using tools such as Selenium, Appium, Postman, and AI-assisted testing tools.

• Ensure automation suites are reliable, maintainable, and aligned with coding and testing standards.

• Apply strong Data Structures & Algorithms (DSA) knowledge to design efficient, scalable, and optimized automation solutions.

• Follow Object-Oriented Programming (OOPS) principles to build reusable, modular, and maintainable automation frameworks and scripts.

• Optimize automation performance through efficient coding practices and logical problem-solving approaches.

• Contribute to clean code practices, refactoring, and peer code reviews to improve overall framework quality.

• Partner closely with developers and QA engineers to understand product features and identify quality risks early in the development lifecycle.

• Participate in design and code reviews to provide feedback on testability and quality considerations.

• Support shift-left testing by integrating automation into CI/CD pipelines for faster feedback.

• Execute automated and manual test cases as needed to validate features across platforms.

• Identify, log, and track defects with clear reproduction steps and root cause analysis.

• Help ensure stable and consistent regression test execution across releases.

• Contribute to quality metrics such as automation coverage, defect trends, and test execution results.

• Assist in building dashboards and reports to support data-driven quality decisions.

• Continuously improve test scripts, tools, and processes for better efficiency and coverage.

• Actively learn and adopt new testing tools, frameworks, and AI-driven testing approaches.

• Follow best practices in automation, coding standards, and test design patterns.

• Share knowledge and contribute to team documentation and best practices.

• Build and stabilize automated test coverage for assigned product areas.

• Improve reliability and execution consistency of existing automation suites.

• Contribute to CI/CD pipeline integration for automated test execution.

• Identify and report quality issues early in the development cycle.

• Demonstrate proficiency with automation tools and frameworks used by the team.

• Independently own automation for key product modules or services.

• Help improve framework capabilities and test execution efficiency.

• Contribute to AI-assisted testing initiatives to increase coverage and reduce manual effort.

• Drive measurable improvements in defect detection and regression stability.

• Become a strong technical contributor and mentor junior SDETs.

• 3–5 years of experience in software testing with a strong focus on test automation.

• 3+ years of hands-on programming experience in languages such as Python or Java.

• Experience building automated tests for web, mobile (iOS/Android), and APIs.

• Familiarity with automation frameworks and tools such as Selenium, Appium, WebDriver, and CI/CD systems.

• Experience with GUI, API, and integration testing.

• Hands-on experience with Jira, Confluence, GitHub, Unix commands, and Jenkins.

• Strong problem-solving skills with good communication and collaboration abilities.

• Ability to work independently on assigned features and automation tasks.