Senior Quality Assurance Engineer

About Yuuki & Co

Yuuki & Co empower clients to thrive in a rapidly evolving sustainability landscape. We provide tailored solutions that drive innovation, efficiency, and long-term impact through research, technology, and strategic partnerships. Our team of experts, including researchers and IT specialists, delivers end-to-end projects or enhances existing sustainability initiatives. Backed by industry veterans, we simplify complex challenges with data-driven insights, storytelling, and impactful reporting to help businesses measure and communicate their sustainability performance effectively.

About the Role

We are looking for an experienced Senior QA Engineer (Part-time) to own quality across our web and/or mobile products. As a core part of our Engineering team, you will blend hands-on manual testing, robust automation, and modern AI-assisted testing practices to strengthen release confidence in a remote-first environment.

This role is ideal for a QA professional who takes real ownership of quality rather than just executing test cases — someone who partners closely with Product and Engineering to catch issues early, and who is curious about using AI to test smarter and faster. This is a great fit for someone who wants meaningful technical ownership without full-time hours, working alongside a team building next-generation AI-powered sustainability platforms.

What You'll Do (Key Responsibilities)

In this role, you will:

• Own end-to-end test planning and execution for new features, integrations, and production fixes.
• Build and maintain UI and API automation suites, keeping them stable, maintainable, and fast.
• Plan and execute manual testing (exploratory, regression, smoke) with clear, actionable defect reporting.
• Integrate automated tests into CI/CD pipelines, and reduce flaky tests to improve suite reliability.
• Apply AI-assisted testing techniques (test generation, self-healing locators, visual checks, coverage suggestions) to accelerate quality work.
• Partner with Product and Engineering to define acceptance criteria, shift quality left, and drive root-cause fixes.

What We're Looking For (Key Requirements)

Must-Have

• 6–10 years of experience in QA roles within fast-paced, agile product teams.
• Strong manual testing fundamentals: test design, risk-based prioritization, and clear defect reporting.
• Hands-on automation experience with Selenium, Cypress, Playwright (or equivalent), plus one scripting language (Java, Python, JavaScript/TypeScript).
• API testing experience (Postman/Newman, RestAssured, Karate, pytest, or similar) with solid REST/HTTP fundamentals.
• Working knowledge of CI/CD tools (Jenkins, GitHub Actions, GitLab CI, Azure DevOps) and Git.
• Comfort using AI tools to improve testing speed, coverage, and productivity.
• Excellent written communication for async, remote collaboration.

Good to Have

• Experience with test management/defect tracking tools (Jira, TestRail, Zephyr, Xray).
• Familiarity with performance testing (k6, JMeter) and basic security/accessibility testing concepts.
• Exposure to cloud/container environments (AWS, Azure, GCP, Docker).
• Visual regression and cross-browser/device testing experience.
• Mobile testing exposure (Android/iOS, Appium).
• Prior experience in sustainability/ESG, analytics, or data-heavy products.

Qualifications

• Bachelor's or master's degree in computer science, Engineering, or related field.
• Equivalent professional experience will also be considered.

Why Join Us?

• Be part of an AI-first product team shaping next-generation digital experiences.
• Flexible working hours and remote setup.
• Opportunity to work with a dynamic, supportive team.
• A structured but flexible role with opportunities for growth.