Software Development Engineer in Test

Summary

Join KOMOJU's growing QA team as a passionate SDET and contribute to both automated and manual testing efforts, ensuring the reliability, functionality, and performance of our payment systems. You will help shape QA processes, working cross-functionally with engineers and product managers. This role offers the opportunity to grow technical and testing skills in a collaborative environment. Responsibilities include designing and maintaining automated test frameworks, executing manual and exploratory testing, analyzing system specifications, identifying and tracking bugs, and supporting CI/CD pipelines. You will collaborate with developers and help establish quality processes. The ideal candidate possesses 2-5 years of experience in software testing or development, proficiency in at least one programming language, and hands-on experience with automated testing tools.

Requirements

• 2–5 years of experience in software testing, automation, or software development
• Proficient in at least one programming language (e.g., TypeScript, JavaScript, Python, or Ruby)
• Hands-on experience with automated testing tools such as Playwright, Selenium, Capybara, or RSpec
• Strong understanding of testing methodologies including unit, integration, and E2E testing
• Experience writing and executing test plans and test cases, both automated and manual
• Familiarity with CI/CD pipelines and test automation integration
• Ability to work independently in ambiguous environments with a strong bias toward action
• Excellent communication and debugging skills

Responsibilities

• Design, develop, and maintain automated test frameworks and tools to improve test coverage and reliability
• Execute and manage manual, exploratory, and regression testing for new features and releases
• Analyze system specifications and technical requirements to provide feedback and ensure testability
• Identify, document, and track bugs through resolution, contributing to improved product quality
• Support the team by building and maintaining CI/CD test pipelines and integrating automated tests into release workflows
• Collaborate with developers to ensure proper testing is done throughout the development lifecycle
• Participate in code reviews and test plan reviews
• Help establish quality processes and best practices across the engineering team
• Investigate and recommend tools or practices that help scale QA and improve team productivity

Preferred Qualifications

• Experience testing multilingual or mobile applications
• Familiarity with AWS, monitoring tools like Datadog, or performance testing
• Exposure to backend systems, APIs, or infrastructure
• Experience working with agile teams or in fast-paced startup environments
• Open-source contributions

Benefits

• 10 days regular vacation, additional 5 days summer and 5 days winter vacation
• Paid birthday holiday
• Budget for self-learning allowance, to ensure our employees’ skills remain current
• Language training for Japanese