QA Automation Engineer

Castor

QA Automation Engineer at Castor responsible for developing and maintaining scalable automation frameworks. Collaborating across teams to implement AI-driven testing strategies and ensure product quality.

Posted 5/8/2026full-timeRemote • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptTypeScript

About the role

Key responsibilities & impact

Architect and maintain a scalable automation framework that supports continuous integration.
Leverage AI and agentic workflows to effectively reduce manual workload by automating the generation of complex test scripts.
Implement CI/CD tooling and AI-based agents to perform autonomous browser automation and exploratory testing.
Actively identify new opportunities to utilize AI for predictive defect analysis and test suite optimization.
Participate in a centralized Automation Engineering Jira board to pick up and prioritize repetitive tasks identified by the wider QA team.

Requirements

What you’ll need

Professional experience in software quality assurance, with a heavy focus on automation using tools like Playwright.
Technical proficiency in TypeScript/JavaScript and building custom CLI tools for automation.
Hands-on experience with Model Context Protocol (MCP) or similar frameworks for building AI-driven agents.
Expertise in CI/CD integration (GitHub Actions).
Experience in claude code (primary tool for maintenance and development).
Proven manual QA experience and a 'QA mindset' to ensure automation is applied with deep product understanding.
Strong communication skills to mentor and enable other QA engineers in using AI-driven automation.

Benefits

Comp & perks

Unlimited annual leave with 25-day minimum.
Downtime weeks: Once a quarter, the whole company shifts gears. No new shipping—just a week for deep focus, learning, or catching up so we can start the next quarter fresh.
AI-first culture: We provide the tools and training to ensure you’re spending your energy on high-value work, not manual repetition.
Real ownership: All Castor team members are offered options through our Employee Stock Option Plan (ESOP).
Comprehensive wellbeing: Free access to Open Up for mental health, specialized sleep courses (for you and your family), and a budget to make your home office a place you actually want to be.
Annual bonus: A guaranteed "Happy Holidays" bonus every December.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

automation frameworkcontinuous integrationAI-driven automationtest scripts generationCI/CD integrationTypeScriptJavaScriptcustom CLI toolsModel Context ProtocolPlaywright

Soft Skills

communication skillsmentoringcollaborationproblem-solvingQA mindset