Hire the Best Software QA Testers
in Mexico

Detail-oriented and proactive QA Tester with over 4 years of experience in manual testing, test case design, and bug tracking within the banking and tech sectors. I specialize in identifying functional issues and improving software quality through precise documentation, collaboration, and structured testing processes. Fluent in Spanish (native) and English (advanced), I am passionate about delivering reliable user experiences by making sure every feature meets high standards. Whether you're building a mobile app or a banking platform, I bring precision, commitment, and a keen eye for quality. Let’s build something reliable—together.

I specialize in providing detailed apps and games testing, user experience feedback, and online support services. Recently, I worked on a time-travel puzzle game where I analyzed gameplay mechanics, user experience, and progression, delivering structured feedback to improve the overall player experience. I have a strong technical background as a Computer Systems Engineer, which allows me to approach problems analytically, identify issues efficiently, and provide clear, actionable insights. I am highly detail-oriented, reliable, and a fast learner. I adapt quickly to new tools, workflows, and project requirements. In addition to game testing, I can assist with: - Spanish translation and communication - Virtual assistant tasks - Data entry and organization - User experience evaluation I am focused on delivering quality work and building long-term professional relationships.

I specialize in identifying bugs before they reach production, particularly in APIs. With hands-on experience in designing and executing test cases for real applications, I validate business rules and report clear, reproducible defects. My skills include creating effective test cases using equivalence classes and boundary value analysis, validating REST APIs with Postman, and delivering actionable bug reports in Jira. I thrive in Agile/Scrum environments, collaborating closely with developers and product teams to ensure quality throughout the development process. My unique background as a veterinary professional adds a fresh perspective to my approach in QA. If you're seeking a meticulous Junior QA Tester who prioritizes early quality assurance and effective communication, let's connect to discuss how I can support your project.

Profile summary Automation Lead and QA Engineer with a Master’s in Computer Science and 6+ years testing web and mobile (iOS, Android). I combine meticulous manual testing with fast automation adoption to deliver reliable releases for complex, multi‑tenant applications. Core services - Test strategy & planning: risk‑based test plans, release readiness, test data management. - Automation: design and implement E2E, smoke and regression suites; rapid Selenium and Playwright integration for greenfield and legacy projects. - API and backend validation: Postman, SQL checks, ACID and data integrity testing. - Performance and device testing: JMeter and real device farms using BrowserStack, Sauce Labs, TestGrid. - Manual testing excellence: exploratory, UI/UX, accessibility, edge cases and detailed defect reporting. - CI/CD and tooling: Jenkins pipelines, GitHub, ClickUp, Jira; documentation, runbooks and stakeholder demos. - Security and multi‑tenant QA: device hardening, vulnerability triage, tenant‑specific flows and compliance checks. Tools and technologies Selenium; Playwright; Postman; JMeter; SQL MySQL BigQuery; BrowserStack; Sauce Labs; TestGrid; Jenkins; GitHub; Jira; ClickUp. What I deliver Fast onboarding, clear test documentation, measurable KPIs (coverage, pass rate, MTTR), and reliable releases—while mentoring teams and keeping stakeholders informed. Rate: $20/hr — Available for short sprints or long‑term engagements.

I’m dedicated to ensuring software performs at its best. For me, testing is not just about identifying bugs, it’s about delivering a seamless and reliable experience for users. With experience across Android, iOS, and desktop platforms, I have an understanding of how each environment impacts usability. I focus on the finer details to identify and address potential issues early on, ensuring that the final product meets high quality standards. My commitment to excellence will make me to continuously improve, learn, and challenge myself to deliver the highest standards in everything I do. P. D. They call me bug hunter.

Nice to meet you all, my name is Jonathan Mercado. A system engineer with 5+ years of experience working as a QA Manual Tester. Throughout my career, I have participated in various projects and environments, utilizing both Agile and Waterfall methodologies. I have worked on software testing, websites, e-commerce, video games, banking systems, among others. My goal is to offer you all my experience and knowledge to ensure the quality and proper functioning of your project. Methodologies and Types of Testing I Use: - Functional Testing - Beta/Alpha Testing - Usability Testing - Acceptance Testing - Mobile Testing (iOS/aOS) - Accessibility Testing - API Testing Tools and Communication Platforms: - Jira (For reporting and tracking bugs found) - Confluence (For project documentation) - TestRail (For creating and executing test cases) - BugHerd - ALM - Postman - SoapUI - Microsoft Environment (Teams, Google Sheets, Office, etc.) I am convinced that my experience and skills can significantly contribute to the success of your project. I look forward to the opportunity to collaborate with you in the future.