Senior Manual QA Engineer – Flutter (Mobile & Web)

Role Overview

At Rehire, we are partnering with an international technology company specializing in digital transformation and software solutions in the search for a Senior Manual QA Engineer to join a cross-platform application development project.

We are looking for an experienced QA professional with strong expertise in manual testing, Flutter applications, and mobile/web quality assurance , capable of taking ownership of testing processes, identifying coverage gaps, and ensuring high-quality software releases.

The ideal candidate combines hands-on testing experience with strong analytical skills, attention to detail, and the ability to establish reliable QA processes across iOS, Android, and Web environments.

About the Position

- Location: Mexico, Guadalajara.
- Work Model: 100% Onsite.
- Engagement Type: Contractor.
- Contract Duration: 12 months.
- Opportunity to work on international cloud security and AI-driven cybersecurity initiatives.
- Collaboration with senior engineers, architects, and distributed technical teams.
- Exposure to AI security agents, security automation, and modern cloud environments.

If you meet the requirements and are interested in this exciting opportunity, apply at www.rehire.ar/jobs and send us your CV!

Responsibilities

Lead the transition and takeover of QA activities, documentation, and test cases from an existing vendor team.; Design, maintain, and execute comprehensive manual test plans and test scenarios for Flutter applications.; Perform functional, regression, exploratory, usability, and end-to-end testing across iOS, Android, and Web.; Identify gaps in existing test coverage and implement improvements based on application risks and business priorities.; Conduct cross-browser and multi-device testing using physical devices, emulators, and simulators.; Identify, document, prioritize, and track defects using issue-tracking tools such as Jira or Buganizer .; Provide detailed bug reports, including reproduction steps, logs, screenshots, and relevant technical information.; Collaborate with developers and UX designers to clarify requirements, define acceptance criteria, and validate functionality.; Establish standardized testing procedures, reusable test datasets, and structured regression suites.; Support release validation and ensure critical defects are identified before production deployments.; Participate in Agile ceremonies and contribute to continuous improvements in QA processes.; Ensure testing activities remain aligned with development timelines and quality standards.

Requirements

4+ years of professional experience in Software Quality Assurance , primarily focused on mobile and web applications.; Hands-on experience performing manual testing of Flutter applications across iOS, Android, and Web.; Strong understanding of Flutter-specific behaviors, widget states, layouts, and platform differences.; Experience designing and executing test cases, test plans, and regression testing suites.; Strong experience with functional, exploratory, usability, and cross-platform testing .; Hands-on experience testing applications on physical iOS and Android devices.; Experience working with emulators, simulators, and multiple web browsers, including Chrome, Safari, Firefox, and Edge.; Familiarity with API testing tools such as Postman, Bruno, or curl .; Experience using mobile debugging tools such as Android Studio, Xcode, or Flutter DevTools .; Familiarity with browser developer tools and debugging consoles.; Experience managing defects through tools such as Jira, Buganizer, or similar platforms .; Experience taking ownership of QA activities in existing projects, including legacy environments or vendor transitions.; Strong knowledge of Agile/Scrum methodologies, SDLC, STLC, and shift-left testing practices .; Excellent analytical, troubleshooting, and problem-solving skills.; Strong technical communication and documentation skills.; Availability to work 100% onsite in Guadalajara, Mexico, five days per week .

Nice to have

Knowledge of accessibility testing (a11y) standards.; Familiarity with internationalization (i18n) testing.; Basic understanding of Dart to support debugging and root-cause analysis.; Experience improving QA processes and test coverage in complex software environments.; Familiarity with risk-based testing strategies and release quality metrics.