QA Engineer for Web Platform (Next.js + Supabase) - Manual Testing

We're looking for a QA Engineer to join an ongoing web platform project built with Next.js, Supabase, and deployed on Vercel. The platform includes a public buyer portal (registration, login, offer catalog, checkout) and an admin panel with role-based access (Admin, Support, Merchant). Responsibilities: Design and execute test plans and test cases for each sprint increment (Scrum, 1-week sprints) Perform functional, regression, and responsive testing (down to 320px) Validate role-based access control, authentication flows (login, registration, magic link password recovery), and payment/redemption flows Report and track bugs with clear reproduction steps (Jira board) Verify acceptance criteria and Definition of Done before stories move to Done (Nice to have) Build automated E2E tests with Playwright or Cypress Requirements: - 2+ years of experience in QA for web applications - Experience testing authentication, roles/permissions, and e-commerce or transactional flows - Familiarity with Agile/Scrum and fast, sprint-based delivery (weekly cadence) - Strong written communication in Sapnish (English is a plus) Details: Part-time, ongoing collaboration aligned to weekly sprint cycles Access to staging environment and repository provided