Senior Software Development Engineer Test

Summary

Join EarnIn as an experienced SDET to play a critical role in transforming QA processes and driving innovation across our testing ecosystem. You will design and develop test automation, scale our AI-powered testing strategy, bring backend and API testing expertise, and apply strong knowledge of testing best practices. This hybrid role, based in Mexico City or remote, offers excellent benefits including healthcare, internet and cell phone reimbursement, a learning and development stipend, and potential travel opportunities. EarnIn is a leader in earned wage access, offering financial flexibility to its community members. We are growing fast and seeking world-class talent to shape our future.

Requirements

• 4+ years of experience transforming QA processes and introducing innovative solutions (ideally involving AI/ML or intelligent automation)
• Strong background in backend and API testing, automation, and best practices
• Familiarity with AI-powered test automation
• Ability to define test strategies and methodologies, and lead best practice adoption
• Proven ability to work effectively with globally distributed teams
• Bachelor’s degree in Computer Science, Computer Engineering, or equivalent required

Responsibilities

• Design, develop, and execute test plans and cases across backend services, APIs, and databases
• Champion backend test automation, especially around API testing
• Lead initiatives to integrate AI-driven tools and agents into the testing pipeline to improve velocity and coverage
• Build and scale AI tooling across backend, general, and simulation testing
• Author, maintain, and evolve automated test frameworks using tools such as Playwright or similar
• Identify and debug automation and application failures; drive resolution with development teams
• Collaborate cross-functionally with developers to ensure comprehensive testing strategies
• Contribute to and improve team processes, tooling, and standards to raise the overall bar for quality
• Participate actively in Agile ceremonies and offer thought leadership in testing methodologies and process improvements
• Mentor and guide QA peers, sharing best practices in testing, automation architecture, and quality strategy

Benefits

• Healthcare
• Internet
• Cell phone reimbursement
• A learning and development stipend
• Potential opportunities to travel to our Mountain View headquarters