Job Summary: Cakto is seeking a Senior QA Tester to ensure the quality of web and mobile applications, guaranteeing stability, security, and performance in solutions that impact thousands of customers. Key Highlights: 1. Strategic experience in software quality assurance 2. Creation and execution of manual and automated tests 3. Collaboration with development, product, and infrastructure teams Cakto, a digital payments platform, is looking for a Senior QA Tester to strengthen our technology team. This professional will play a strategic role in ensuring the quality of our web and mobile applications, guaranteeing stability, security, and performance in solutions that directly impact thousands of customers. Responsibilities Plan, create, and execute test cases and scenarios (manual and automated). Ensure quality throughout the entire software lifecycle, from requirement definition to final delivery. Perform functional, regression, integration, performance, and usability testing on web and mobile applications. Validate system and API integrations (REST/GraphQL). Create, maintain, and enhance automated test suites using modern tools (Selenium, Cypress, Playwright). Collaborate with development, product, and infrastructure teams to identify, reproduce, and track resolution of defects. Document bugs, test plans, and quality reports, ensuring traceability. ✅ Mandatory Requirements Minimum 5 years of experience in QA/software testing. **Databases:** Basic SQL for queries and data validation. **Networking and APIs:** Practical experience in testing web and mobile applications. **Version Control (Git):** Tracking code changes. **Scripting Language:** Proficiency in at least one (Python or JavaScript). **Test Automation:** Expertise in at least one of the following tools: Selenium, Cypress, or Playwright. Analytical ability and an investigative mindset to identify critical scenarios. Strong communication skills for interaction with technical and business teams. Advantages Experience in fintechs, payment gateways, or acquirers. Experience with CI/CD and integration of automated tests into pipelines. Knowledge of security and performance testing. Certifications in QA or software testing.