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.

Work arrangement
Yes