Efrain Andres Vergara Serrato

Efrain Andres Vergara Serrato

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Senior SDET | Mobile, Web & API Automation | Appium, WebdriverIO, CI/CD
Bogotá, Bogota, Colombia

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Jobs verified_user 0% verified
  • Unosquare
    Senior SDET / QA Automation Engineer public Remote experience
    Unosquare
    Jan 2023 - Current (3 years 5 months)
    - Designed, maintained, and improved automated test suites for mobile and web applications using Appium, WebdriverIO, Selenium, JavaScript/TypeScript, and CI/CD pipelines. - Supported regression testing, smoke testing, release candidate validation, and production readiness checks for iOS and Android applications. - Investigated flaky tests related to waits, selectors, app state, real devices, cloud devices, feature flags, test data, and environment instability. - Validated critical product flows such as onboarding, payments, upgrade flows, service booking, video calls, deep links, push notifications, and feature flag behavior. - Collaborated with remote engineering, QA, product, and DevOps teams to identify release risks, document issues, a
  • Houm
    QA Engineer
    Houm
    Apr 2022 - Nov 2022 (8 months)
    - Performed functional, regression, smoke, and exploratory testing for web and mobile product flows. - Created, maintained, and executed test cases for critical user journeys. - Reported defects with clear reproduction steps, evidence, expected results, actual behavior, and business impact. - Collaborated with product, engineering, and QA teams in agile ceremonies to improve release quality. - Leveraged experience with Java and Python, gained from prior automation work and a general understanding of programming concepts, to enhance QA automation scenarios and debugging efforts. This background complements the core responsibilities of software testing, test case design, and collaboration with engineering teams.
  • ADL Digital Lab
    Quality Assurance Automation Engineer
    ADL Digital Lab
    Jul 2020 - Apr 2022 (1 year 10 months)
    - Built and maintained automated test cases for web applications using Selenium, Java, and CI/CD pipelines. - Supported functional, regression, smoke, sanity, and API testing across digital products. - Collaborated with developers, product owners, and QA teams to clarify acceptance criteria and validate new features. - Integrated automated tests into Jenkins pipelines to support continuous testing and faster feedback.
  • Simetrik Inc.
    Quality Assurance Automation Engineer
    Simetrik Inc.
    Apr 2020 - Jul 2020 (4 months)
    - Validated financial and reconciliation workflows through functional, regression, and automation testing. - Performed API testing, data validation, and business rule verification for critical financial scenarios. - Created and executed test cases focused on data accuracy, integrations, edge cases, and production risk. - Collaborated with engineering and product teams to identify defects and improve quality before release.
  • Ormigga.com
    Quality Assurance Automation Engineer
    Ormigga.com
    Feb 2020 - Apr 2020 (3 months)
    - Executed functional, regression, and exploratory testing for web application features. - Created and maintained automated test cases for core business flows. - Reported bugs with clear evidence, reproduction steps, and expected versus actual results. - Collaborated with developers to validate fixes and reduce regression risk.
  • Grupo Append
    Quality Assurance Automation Engineer
    Grupo Append
    Aug 2019 - Feb 2020 (7 months)
    - Designed and executed manual and automated test cases for web-based applications. - Supported regression testing, functional testing, smoke testing, and defect validation. - Worked with Selenium, Git, Jira, and CI tools to support QA activities. - Collaborated with agile teams to validate requirements, report issues, and improve product quality.
  • Seven4n
    Quality Assurance Automation Engineer
    Seven4n
    Dec 2017 - Aug 2019 (1 year 9 months)
    - Created and maintained automated tests for web applications. - Executed functional, regression, exploratory, and manual testing for multiple software projects. - Participated in agile ceremonies, test planning, bug reporting, and release validation. - Worked closely with developers and QA teams to reproduce issues, validate fixes, and improve testing coverage.
Education verified_user 0% verified
  • Universidad de Cundinamarca
    Ingeniería, Desarrollo de Software
    Universidad de Cundinamarca
    Jan 2014 - Nov 2018 (4 years 11 months)
Projects (professional or personal) verified_user 0% verified
  • P
    SDET Interview Practice AI public Remote experience
    Personal project
    May 2026 - Current (1 month)
    Built a web-based MVP to help SDET candidates practice technical interviews using AI-generated questions, answer evaluation, scoring, feedback, and final reports. The project uses Next.js, TypeScript, Tailwind CSS, local AI with Ollama, and a mock AI provider for deterministic automated testing. The platform focuses on Senior SDET scenarios such as automation framework architecture, CI/CD strategy, flaky test debugging, test data management, API/UI/mobile automation strategy, and technical communication. Implemented answer validation, prompt engineering, AI provider abstraction, and a testing strategy using mock providers for reliable automated tests.