Ensuring Digital Excellence through Technical Precision

Quality Engineering that Drives Your Product

With over a decade of experience, I specialize in designing robust testing frameworks that accelerate delivery cycles without compromising reliability.

Technical Arsenal

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QA Automation Architecture Audit

I thoroughly analyze your current testing framework to eliminate flaky tests, drastically reduce execution times, and ensure native, clean integration with your CI/CD pipelines.

30% Reduced Test Time
15% More Bugs Found
10+ Years Exp.
Testing Types
Functional Regression Smoke E2E Exploratory Sanity QA Manual Visual Cross-Browser
Playwright Cypress CI/CD Docker Refactoring
rocket_launch

End-to-End Test Automation Kickoff

I build robust testing laboratories using Cypress or Playwright, tailored exactly to your business logic. From initial scaffolding to the first Allure report.

TypeScript Screenplay API Mocking Allure Locators
monitoring

Performance & Load Testing

Prevent downtime during traffic spikes. I design massive concurrent simulations with k6 and JMeter to discover the exact breaking point of your Microservices and APIs before they shatter.

k6 JMeter Grafana Load Testing Stress APIs
school

SDET Technical Mentorship & Training

I transform your manual QA team or Junior developers into core Software Development Engineers in Test (SDETs) with real-world practices and market methodologies.

Git Node.js BDD Cucumber Clean Code Bootcamp
Playwright
Cypress
Selenium
Appium
JMeter
Postman
GitHub Actions
Jenkins
Allure
k6
TestRail
Jira
REST Assured
Docker
Newman
Gherkin
BDD
SonarQube
Xray
TypeScript
Playwright
Cypress
Selenium
Appium
JMeter
Postman
GitHub Actions
Jenkins
Allure
k6
TestRail
Jira
REST Assured
Docker
Newman
Gherkin
BDD
SonarQube
Xray
TypeScript

The Professional Journey

SEP 2022 — PRESENT

QA Lead

QA-BIT, Madrid, Spain

QA Lead – QA Automation & Mobile Testing Engineer

  • Led the planning, design, and execution of automated testing strategies for web, API, and mobile applications (Android and iOS)
  • Developed and maintained automation frameworks using Playwright and Cypress for web testing
  • Implemented mobile test automation using Appium for native Android and iOS applications
  • Designed and executed API automation tests using Postman, ensuring data integrity and backend reliability
  • Performed performance, load, and stress testing using JMeter to validate system scalability and stability
  • Streamlined testing processes through automation, reducing test execution time by 30%
  • Improved defect detection by identifying 15% more critical bugs before production releases
  • Executed functional, regression, smoke, exploratory, and end-to-end testing across platforms
  • Collaborated with developers, product owners, and QA teams in Agile/Scrum environments
  • Integrated automated tests into CI/CD pipelines to support continuous testing and faster releases
  • Ensured compliance with quality, performance, and security standards throughout the SDLC
Click to expand
MAR 2024 — PRESENT

QA Engineer – Manual & Automation Testing

Kameleonlabs, Spain

QA Engineer – Manual & Automation Testing

QA Engineer specializing in manual and automated testing for web and mobile applications. Responsible for ensuring quality, reliability, and usability of software products across multiple platforms.

  • Design and execute manual test cases based on functional, technical, and business requirements
  • Develop and maintain automated test suites using Playwright to improve regression coverage and efficiency
  • Perform API testing with Postman, validating endpoints, request/response flows, authentication, and data integrity
  • Execute performance and load testing using JMeter to identify bottlenecks and ensure system scalability
  • Conduct regression, smoke, sanity, exploratory, and end-to-end testing across multiple platforms
  • Identify, document, prioritize, and track defects using Jira
  • Collaborate in Agile/Scrum environments: sprint planning, reviews, retrospectives, and defect triage
  • Validate application behavior across different browsers, operating systems, and screen sizes
Click to expand
DIC 2024 — JUL 2025

QA Engineer – Manual & Automation Testing

Soaint, Spain

QA Engineer – Manual & Automation Testing

QA Engineer responsible for quality, reliability, and usability of web and mobile products (Android & iOS) in digital transformation projects.

  • Design and execute manual test cases based on functional, technical, and business requirements
  • Perform mobile application testing on Android and iOS: functionality, usability, compatibility, installation, updates, and device-specific validations
  • Develop and maintain automated test suites for web and API testing using Cypress, Selenium, and Playwright
  • Execute regression, smoke, exploratory, sanity, and end-to-end testing across web and mobile platforms
  • Identify, document, prioritize, and track defects using Jira
  • Validate mobile performance and UX across multiple devices, OS versions, and screen sizes
  • Collaborate in Agile/Scrum environments: sprint planning, reviews, and defect triage
Click to expand
2023 — 2024

QA Automation Engineer

Genius Referrals, USA

QA Automation Engineer

Developed, implemented, and maintained robust automated testing frameworks for web and mobile applications, using Cypress for web automation and Appium for native mobile testing on Android and iOS.

  • Implemented automated functional, regression, and end-to-end test suites for both platforms
  • Integrated automated tests into CI/CD pipelines, reducing overall testing execution time by 40%
  • Contributed to a 20% reduction in production defects, enhancing application stability and performance
  • Designed scalable, reusable, and maintainable automation solutions across web, Android, and iOS
  • Collaborated with developers, product owners, and QA teams to align automation with business requirements
  • Proactively identified quality risks and continuously improved testing processes and automation frameworks
Click to expand
SEP 2017 — 2021

QA Automation & Mobile Specialist

Guajiritos, Havana, Cuba

QA Automation & Mobile Specialist

  • QA Automation and Mobile Testing specialist with experience in manual and automated testing across web and mobile applications (Android and iOS)
  • Design, creation, and execution of test strategies, test plans, and test cases aligned with business and technical requirements
  • Strong experience in mobile application testing: installation, upgrades, permissions, notifications, network conditions, and cross-device compatibility
  • Functional, regression, smoke, sanity, exploratory, usability, and end-to-end testing
  • Development and maintenance of automated test scripts using Selenium, Cypress, and Playwright
  • Collaboration with cross-functional teams throughout the SDLC
  • Active participation in Agile/Scrum ceremonies: sprint planning, stand-ups, reviews, and retrospectives
  • Identification, documentation, prioritization, and tracking of defects using bug-tracking tools
  • Support of CI/CD pipelines through automated test execution and continuous testing practices
Click to expand
MAY 2024 — 2025

AI Process Automation & SEO Specialist

ACL, Florida, USA

AI Process Automation & SEO Specialist

  • Automated business and digital workflows using AI-powered tools to reduce manual tasks and improve operational efficiency
  • Designed and implemented end-to-end process automation using Make (Integromat) to orchestrate workflows between multiple platforms
  • Developed and deployed web applications and websites to trigger, manage, and monitor automated processes
  • Integrated APIs, databases, and AI services to enable seamless data flow and intelligent automation
  • Applied AI-assisted automation to data processing, content generation, performance tracking, and reporting
  • Collaborated with cross-functional teams to analyze processes, identify automation opportunities, and implement scalable solutions
  • Combined technical automation skills with SEO knowledge to optimize digital processes and system integration
Click to expand
SEP 2022 — PRESENT

QA Lead

QA-BIT, Madrid, Spain

QA Lead – QA Automation & Mobile Testing Engineer

  • Led the planning, design, and execution of automated testing strategies for web, API, and mobile applications (Android and iOS)
  • Developed and maintained automation frameworks using Playwright and Cypress for web testing
  • Implemented mobile test automation using Appium for native Android and iOS applications
  • Designed and executed API automation tests using Postman, ensuring data integrity and backend reliability
  • Performed performance, load, and stress testing using JMeter to validate system scalability and stability
  • Streamlined testing processes through automation, reducing test execution time by 30%
  • Improved defect detection by identifying 15% more critical bugs before production releases
  • Executed functional, regression, smoke, exploratory, and end-to-end testing across platforms
  • Collaborated with developers, product owners, and QA teams in Agile/Scrum environments
  • Integrated automated tests into CI/CD pipelines to support continuous testing and faster releases
  • Ensured compliance with quality, performance, and security standards throughout the SDLC
Click to expand
MAR 2024 — PRESENT

QA Engineer – Manual & Automation Testing

Kameleonlabs, Spain

QA Engineer – Manual & Automation Testing

QA Engineer specializing in manual and automated testing for web and mobile applications. Responsible for ensuring quality, reliability, and usability of software products across multiple platforms.

  • Design and execute manual test cases based on functional, technical, and business requirements
  • Develop and maintain automated test suites using Playwright to improve regression coverage and efficiency
  • Perform API testing with Postman, validating endpoints, request/response flows, authentication, and data integrity
  • Execute performance and load testing using JMeter to identify bottlenecks and ensure system scalability
  • Conduct regression, smoke, sanity, exploratory, and end-to-end testing across multiple platforms
  • Identify, document, prioritize, and track defects using Jira
  • Collaborate in Agile/Scrum environments: sprint planning, reviews, retrospectives, and defect triage
  • Validate application behavior across different browsers, operating systems, and screen sizes
Click to expand
DIC 2024 — JUL 2025

QA Engineer – Manual & Automation Testing

Soaint, Spain

QA Engineer – Manual & Automation Testing

QA Engineer responsible for quality, reliability, and usability of web and mobile products (Android & iOS) in digital transformation projects.

  • Design and execute manual test cases based on functional, technical, and business requirements
  • Perform mobile application testing on Android and iOS: functionality, usability, compatibility, installation, updates, and device-specific validations
  • Develop and maintain automated test suites for web and API testing using Cypress, Selenium, and Playwright
  • Execute regression, smoke, exploratory, sanity, and end-to-end testing across web and mobile platforms
  • Identify, document, prioritize, and track defects using Jira
  • Validate mobile performance and UX across multiple devices, OS versions, and screen sizes
  • Collaborate in Agile/Scrum environments: sprint planning, reviews, and defect triage
Click to expand
2023 — 2024

QA Automation Engineer

Genius Referrals, USA

QA Automation Engineer

Developed, implemented, and maintained robust automated testing frameworks for web and mobile applications, using Cypress for web automation and Appium for native mobile testing on Android and iOS.

  • Implemented automated functional, regression, and end-to-end test suites for both platforms
  • Integrated automated tests into CI/CD pipelines, reducing overall testing execution time by 40%
  • Contributed to a 20% reduction in production defects, enhancing application stability and performance
  • Designed scalable, reusable, and maintainable automation solutions across web, Android, and iOS
  • Collaborated with developers, product owners, and QA teams to align automation with business requirements
  • Proactively identified quality risks and continuously improved testing processes and automation frameworks
Click to expand
SEP 2017 — 2021

QA Automation & Mobile Specialist

Guajiritos, Havana, Cuba

QA Automation & Mobile Specialist

  • QA Automation and Mobile Testing specialist with experience in manual and automated testing across web and mobile applications (Android and iOS)
  • Design, creation, and execution of test strategies, test plans, and test cases aligned with business and technical requirements
  • Strong experience in mobile application testing: installation, upgrades, permissions, notifications, network conditions, and cross-device compatibility
  • Functional, regression, smoke, sanity, exploratory, usability, and end-to-end testing
  • Development and maintenance of automated test scripts using Selenium, Cypress, and Playwright
  • Collaboration with cross-functional teams throughout the SDLC
  • Active participation in Agile/Scrum ceremonies: sprint planning, stand-ups, reviews, and retrospectives
  • Identification, documentation, prioritization, and tracking of defects using bug-tracking tools
  • Support of CI/CD pipelines through automated test execution and continuous testing practices
Click to expand
MAY 2024 — 2025

AI Process Automation & SEO Specialist

ACL, Florida, USA

AI Process Automation & SEO Specialist

  • Automated business and digital workflows using AI-powered tools to reduce manual tasks and improve operational efficiency
  • Designed and implemented end-to-end process automation using Make (Integromat) to orchestrate workflows between multiple platforms
  • Developed and deployed web applications and websites to trigger, manage, and monitor automated processes
  • Integrated APIs, databases, and AI services to enable seamless data flow and intelligent automation
  • Applied AI-assisted automation to data processing, content generation, performance tracking, and reporting
  • Collaborated with cross-functional teams to analyze processes, identify automation opportunities, and implement scalable solutions
  • Combined technical automation skills with SEO knowledge to optimize digital processes and system integration
Click to expand
Nestor Alonso

My Approach

Automation-First Mindset

I focus on reducing manual tasks through AI-powered tools and robust frameworks to improve operational efficiency.

Data-Driven Quality

By monitoring automated processes and analyzing results, I ensure that every release meets the highest performance standards.

Scalable Resilience

Building maintainable test architectures that grow with the product, ensuring long-term reliability.

Success Stories

Recent Case Studies

Real technical solutions to complex software quality and automation challenges.

Explore Portfolio grid_view
Fintech Mobile Automation Strategy
Mobile Testing

Fintech Mobile Automation Strategy

Implementation of an E2E framework for iOS and Android using Appium and WebdriverIO, integrating cloud simulators for parallel testing.

Appium WebdriverIO BrowserStack CircleCI TypeScript
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Enterprise Playwright E2E Migration
Web Automation

Enterprise Playwright E2E Migration

Migration of a legacy Selenium suite to Playwright, improving test stability by 40% and eliminating false positives.

Playwright JavaScript Docker GitHub Actions Allure
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Healthcare API Security & Load Testing
API Testing

Healthcare API Security & Load Testing

Technical API audit under HIPAA standards, executing automated penetration tests and heavy load simulations.

Postman k6 OWASP ZAP Newman Python
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Sharing Knowledge

Latest from the Blog

Explore my articles on QA Automation, Mobile Testing, and industry best practices.

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Master XPath: Interactive Guide to XML Navigation
QA Automation
Mar 22, 2026 6 min read

Master XPath: Interactive Guide to XML Navigation

Explore the full power of XPath. Learn without fluff why XPath is still relevant in 2026 and how to optimally leverage it in JS, Java, and automation.

Read Article east

Ready to optimize?

Let's discuss how technical QA Automation can transform your digital product.