Clarissa is available for hire
Hire ClarissaClarissa Mitidiero
Verified Expert in Engineering
QA Engineer and Developer
Valinhos - São Paulo, Brazil
Toptal member since January 28, 2021
Bio
Clarissa is a responsible, detail-oriented, and hardworking QA with 12+ years of experience across front-end, mobile, back-end, and data testing. She has worked with web and mobile apps (iOS/Android), complex integrations, APIs, databases, and data pipelines. Clarissa has a strong background in UI validation, cloud environments (AWS/Azure), CI/CD, and agile collaboration, contributing to test strategy, risk analysis, and high-quality releases.
Portfolio
Zoetis - Tech and Digital
Quality Assurance (QA), SQL, QA Testing, QA Leadership, Azure Databricks, ETL...
Volvo Car USA - Digital Product Engineering
SQL, Data Validation, Salesforce, Snowflake, Azure SQL, Notion, Databricks...
The Weather Channel
Manual QA, Jira, Git, Roku, Figma, Telnet Protocol, Code Review, Task Analysis...
Experience
- Test Case Creation - 10 years
- Database Testing - 10 years
- Requirements Analysis - 10 years
- Bug Analysis & Reporting - 10 years
- Functional Testing - 10 years
- API Testing - 7 years
- Mobile App Testing - 7 years
- JSON - 7 years
Preferred Environment
BrowserStack, Jira, Gherkin, Quality Assurance (QA), API Testing, Requirements Analysis, Front-end, Mobile, Back-end, Database Testing
The most amazing...
...system I've tested involved several queues and real-time data of a complex, cloud-based telecom system responsible for the data of the country's services.
Work Experience
QA Lead
2024 - 2026
Zoetis - Tech and Digital
- Performed data quality and validation testing on data integration pipelines using Databricks, ensuring accuracy and reliability across large-scale datasets.
- Designed and executed SQL and Python-based tests to validate data stored in tables, covering integrity, completeness, uniqueness, and consistency checks.
- Implemented data quality checks to detect anomalies such as out-of-range values, invalid records, duplicates, schema mismatches, and inconsistencies between source and target systems.
- Validated ETL/ELT pipelines across Bronze, Silver, and Gold layers, ensuring business rules and transformations were correctly applied.
- Analyzed high-volume datasets, comparing source and destination data to ensure correctness and end-to-end data consistency.
- Investigated data load failures and inconsistencies through SQL analysis, log inspection, and historical data comparison, supporting efficient troubleshooting.
- Tested full and incremental data loads, including reprocessing scenarios, validating idempotency and data stability.
- Worked closely with data engineering, analytics, and business stakeholders to define validation rules, acceptance criteria, and data quality standards.
- Documented data validation logic, test scenarios, and results to support auditability and continuous improvement of data pipelines.
Technologies: Quality Assurance (QA), SQL, QA Testing, QA Leadership, Azure Databricks, ETL, Python, Pipelines, SQL Server 2019
QA Engineer
2024 - 2025
Volvo Car USA - Digital Product Engineering
- Developed and ran database test cases to validate back-end logic and ensure reliable data processing.
- Validated data changes, data flows, constraints, and calculations by running SQL queries and comparing results across environments.
- Used SQL scripts to confirm data accuracy, transaction integrity, and correct behavior after schema updates.
Technologies: SQL, Data Validation, Salesforce, Snowflake, Azure SQL, Notion, Databricks, Database Testing, Microsoft SQL Server, Code Review, Task Analysis, Technical Hiring, Source Code Review, Team Management, Azure Databricks, SQL Server 2019, ETL
Manual QA Engineer
2024 - 2024
The Weather Channel
- Ensured the quality of the transition process for movies, series, and shows in the company's player for use on the Roku device, considering different bandwidth speeds and fault tolerance scenarios.
- Performed a Roku log investigation using Telnet to ensure endpoints were used properly and response time was adequate to the specifications.
- Conducted a Roku log investigation using Charles Proxy to ensure endpoints and functionality were working properly.
- Checked the compatibility of the implemented layout against the Figma design, considering TVs and monitors of different screen sizes and resolutions.
Technologies: Manual QA, Jira, Git, Roku, Figma, Telnet Protocol, Code Review, Task Analysis, Technical Hiring, Source Code Review, SQL Server 2019, ETL
Data Quality Engineer
2023 - 2024
Idelic
- Ensured data quality, comparing the input data in different formats (JSON, CSV, DB2, APIs) versus the information entered into the QA and prod environments, considering transformation rules applied to each field and/or data set.
- Tested data import processes using Apache Airflow, ensuring the job followed the correct steps and considering the data types at the source.
- Checked the quality and affected data through the Apache Airflow logs and handmade scripts provided by the engineering team and subsequently checked the data in the target environment.
- Combined and compared different reports across the environments where data would pass to ensure the transformations would respect the business rules specified.
Technologies: Manual Testing, Data Quality Management, Data Quality Analysis, AWS Glue, Amazon Athena, Amazon S3 (AWS S3), Apache Airflow, Jira, Python, QA Leadership, Data Validation, Code Review, Task Analysis, Technical Hiring, Source Code Review, Team Management, Azure Databricks, ETL
QA Engineer
2023 - 2023
National Center for Atmospheric Research - General
- Performed test execution with BE (Postman) and FE (mobile and web).
- Provided team support, registration of bugs, and follow-up on corrections.
- Performed analysis and troubleshooting on QA and UAT tickets.
- Supported stakeholders and feature maintenance phases during preparation for Go Live.
Technologies: Magento, QA Leadership, Code Review, Task Analysis, Source Code Review, Team Management, ETL
QA Engineer
2023 - 2023
Hearst - eCommerce Tower Project
- Performed test execution: BE (Postman), Magento Commerce, CMS, and FE (web and mobile).
- Provided team support, including scenario simulation and forecasting possible consequences caused by changes in the system, registration of bugs, and follow-up on corrections.
- Performed analysis and troubleshooting on QA and UAT tickets.
- Supported stakeholders and feature maintenance phases during preparation for Go Live.
- Provided support for leaders to include all necessary information on client websites before going live.
Technologies: Quality Assurance (QA), Content Management Systems (CMS), Magento, Testing Strategy, Contentful, Postman, JSON, QA Testing, Data Validation, Code Review, Task Analysis, Interviewing, Source Code Review, Team Management, ETL
QA Engineer - Manual Testing
2021 - 2023
Transform Data Inc
- Created the company's QA area and organized the processes providing the necessary quality assurance flows.
- Performed the initial tests and executed the analysis to check for initial critical bugs to verify the current state of the application.
- Provided analysis and troubleshooting on open tickets.
- Participated since the transition from the original metrics functionality to the new BI platform.
- Contributed to product definition and requirements gathering meetings, helping to create tasks following BDD, and helping, together with another QA, define all the new QA processes necessary for this new phase of the product and all test execution.
- Configured test environments and performed GUI, functional, integration, exploratory, regression, usability, and UAT testing in web environments using multiple browsers and operational Systems.
- Validated data integration with Snowflake, Slack, and Google Sheets.
- Organized the releases and became the focal point for validating pull requests before merging into the main brunch and later creating the release for production.
- Supported stakeholders and the maintenance phases of the functionalities during all production releases.
Technologies: Quality Assurance (QA), SQL, Manual QA, Asana, Project Management, Database Testing, Python, Snowflake, Functional Testing, Release Management, Git GUI, Notion, GUI Testing, BrowserStack, Slack, Google Sheets, Black Box Testing, Test Cases, Databases, APIs, Testing, Web App Testing, Test Planning, Cross-platform, Software QA, QA Testing, Test Management, Web Service Testing, Git, User Acceptance Testing (UAT), Exploratory Testing, Integration Testing, Postman, REST APIs, UI Testing, Testing Strategy, Amazon S3 (AWS S3), QA Leadership, Data Validation, Code Review, Task Analysis, Technical Hiring, Interviewing, Source Code Review, Team Management, Selenium, SQL Server 2019, ETL
Manual Tester
2021 - 2022
Azrieli Ecommerce Ltd.
- Participated in grooming and front-end refinement meetings with the client to survey potential test scenarios and deliver subsequent completion of functional specification documentation.
- Configured test environments and performed GUI, functional, integration, exploratory, regression, and usability testing in mobile responsive and web environments.
- Provided team support, including scenario simulation and forecasting of possible consequences caused by changes in the system, registration of bugs, and follow-up on corrections.
- Created and updated QA documentation used by teams, including test strategy, test plan, test scripts, and checklists. All information was discussed in functional specification meetings directly with the client.
- Validated all functionality integrations with third-party applications.
- Performed analysis and troubleshooting on open tickets.
- Supported stakeholders and the maintenance phases of the functionalities during all production releases.
- Organized releases and became the focal point for validating all tasks and environments before the departure for production. After the release, performed smoke testing to validate if the functionalities were working correctly.
Technologies: Manual Testing, Quality Assurance (QA), eCommerce, Angular, Akeneo, API Testing, APIs, BrowserStack, Bug Analysis & Reporting, Confluence, Sylius, Mirakl, Figma, Riskified, Slack, TestRail, Exploratory Testing, GUI Testing, Release Management, Functional Testing, Database Testing, Test Cases, Test Case Execution, Test Case Creation, Black Box Testing, Kontent CMS, Databases, Testing, Web App Testing, Test Planning, Cross-platform, Software QA, QA Testing, Test Management, Web Service Testing, User Acceptance Testing (UAT), Regression Testing, Integration Testing, Scrum, Jira, Postman, REST APIs, UI Testing, Testing Strategy, Contentful, Content Management Systems (CMS), Code Review, Task Analysis, Technical Hiring, Interviewing, Source Code Review, Team Management, ETL
QA Manual
2019 - 2021
BEOC Tech
- Configured test environments and performed GUI, functional, integration, exploratory, regression, usability, and UAT testing in mobile apps and web environments.
- Created and updated QA documentation, including software requirements specification, test strategy, test plan, test scripts, and checklists. All information was discussed in functional specification meetings directly with the client.
- Developed a report for the client with the test results and their evidence.
- Validated all functionality integrations with third-party applications.
- Provided team support, including scenario simulation and forecasting of possible consequences caused by changes in the system, registration of bugs, and follow-up on corrections.
Technologies: Test Case Creation, GUI Testing, Functional Testing, Requirements Analysis, BrowserStack, Database Testing, Salesforce Commerce Cloud, Oracle ATG, Drupal, Postman, Bug Analysis & Reporting, API Testing, Jira, Confluence, TestLink, Jira Xray, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, Cross-platform, eCommerce, MySQL, Magento, PHP, Test Planning, Web App Testing, Angular, Sylius, Akeneo, Salesforce, Kontent CMS, Mobile App Testing, Figma, Sympli, Testing, Notion, APIs, Asana, Databases, Test Cases, TestRail, Black Box Testing, Python, Snowflake, Git GUI, Google Sheets, Release Management, Slack, Git, Customer Support, User Acceptance Testing (UAT), Regression Testing, Exploratory Testing, Integration Testing, Scrum, SoapUI, Test Case Execution, REST APIs, UI Testing, Testing Strategy, Contentful, Content Management Systems (CMS), Data Validation, Code Review, Task Analysis, Interviewing, Source Code Review, SQL Server 2019, ETL
QA Engineer
2018 - 2019
OSF Global
- Created and updated team QA documentation, including software requirements specification, test strategy, test plan, test scripts, and checklists.
- Configured test environments and performed GUI, functional, integration, exploratory, regression, usability, and UAT testing in mobile apps, mobile responsive, and web environments.
- Developed a report for the client with the test results and their evidence.
- Monitored UAT testing and provided customer support.
- Provided team support exploring scenario simulation and possible forecasting consequences caused by changes in the system.
- Registered bugs and followed up on their corrections.
Technologies: API Testing, Test Case Creation, GUI Testing, Functional Testing, Database Testing, Salesforce Commerce Cloud, Oracle PL/SQL, TestLink, Bug Analysis & Reporting, BrowserStack, Confluence, Jira, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, Cross-platform, eCommerce, Test Planning, Web App Testing, Angular, Sylius, Akeneo, Salesforce, Kontent CMS, Figma, Sympli, Testing, Databases, Test Cases, Black Box Testing, Release Management, Slack, APIs, Customer Support, User Acceptance Testing (UAT), Regression Testing, Exploratory Testing, Integration Testing, Scrum, Test Case Execution, REST APIs, UI Testing, Testing Strategy, Contentful, Content Management Systems (CMS), Code Review, Task Analysis, Interviewing, Source Code Review, Team Management, Selenium, SQL Server 2019, ETL
QA Engineer
2016 - 2018
Ci&T
- Participated in grooming meetings with the client to survey potential test scenarios and deliver subsequent completion of functional specification documentation.
- Created and updated QA documentation used by teams, including software requirement specifications, test strategy, test plan, test scripts, and checklists. All information was discussed in functional specification meetings directly with the client.
- Worked as a focal point between the client and the team during project development, providing all the necessary information.
- Provided team support, including scenario simulation and forecasting of possible consequences caused by changes in the system, registration of bugs, and follow up on corrections.
- Configured test environments and performed functional, integration, exploratory, regression, usability, mobile, and web testing.
- Performed API testing, checking if the JSON and XML structure and its responses were correct. Tested HTTP requests and whether the status code was correct as expected and when an error occurred if the status was per the error codes.
- Wrote and executed SQL queries and checked whether the data stored in the tables were correct.
- Performed root cause analysis on the bugs found and presented a dashboard to the team during the retrospective meeting, including all tests performed, bugs found, and suggested improvements.
- Presented all activities from the sprint to the client, monitored UAT testing, and provided customer support.
- Created a report for the client, including test results and their evidence.
Technologies: Oracle PL/SQL, GUI Testing, Functional Testing, XML Schema, Database Testing, Mobile App Testing, Behavior-driven Development (BDD), Gherkin, User Acceptance Testing (UAT), Test Case Execution, Test Case Creation, Requirements Analysis, Exploratory Testing, PuTTY, Scrum, Google App Engine, TestLink, Postman, Customer Support, Crashlytics, Drupal, SoapUI, JSON, Integration Testing, Git, Bug Analysis & Reporting, Confluence, BrowserStack, Jira, API Testing, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, Cross-platform, eCommerce, MySQL, Test Planning, Web App Testing, Angular, Salesforce, Figma, Sympli, Testing, Black Box Testing, Git GUI, Release Management, Slack, Test Cases, Databases, APIs, Regression Testing, REST APIs, UI Testing, Testing Strategy, Code Review, Task Analysis, Technical Hiring, Interviewing, Source Code Review, Team Management, Selenium, SQL Server 2019, ETL
QA Analyst
2015 - 2016
Thomson Reuters
- Created and updated team QA documentation, including test strategy, test plan, test cases, and checklists. All information was discussed in functional specification meetings directly with the client.
- Provided team support, including scenario simulation and possible forecasting consequences caused by changes in the system.
- Performed functional, integration, exploratory, acceptance, regression, and usability testing on the Import and Export Global Trade System.
- Executed API testing, checking if the JSON and XML structure and responses were correct. Tested HTTP requests and whether the status code was valid as expected and when an error occurred if the status was as per the error codes.
- Wrote and executed SQL queries and checked whether the data stored in the tables were correct.
- Registered bugs and followed up on their corrections.
- Established a report to the client, including test results and evidence.
Technologies: Test Case Creation, GUI Testing, Database Testing, Regression Testing, Exploratory Testing, Integration Testing, Scrum, API Testing, Requirements Analysis, Functional Testing, Bug Analysis & Reporting, BrowserStack, Jira, OpenVPN, TestLink, XML Schema, JSON, Postman, SoapUI, Oracle PL/SQL, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, Cross-platform, MySQL, Test Planning, Web App Testing, Testing, APIs, Databases, Test Cases, Black Box Testing, Release Management, Slack, User Acceptance Testing (UAT), Test Case Execution, REST APIs, UI Testing, Testing Strategy, Task Analysis, Interviewing, Source Code Review, Code Review, Selenium, SQL Server 2019, ETL
QA Analyst
2013 - 2015
HITSS Solutions
- Created and planned test activities and provided daily reports about them.
- Developed and updated team QA documentation, including test strategy, test plan, test scripts, and checklists. All information was discussed in functional specification meetings directly with the client.
- Configured test environments and performed functional, integration, exploratory, acceptance, regression, usability, mobile, and web testing.
- Performed API testing, checking if the JSON and XML structure and its responses were correct. Tested HTTP requests and whether the status code was valid as expected and when an error occurred if the status was as per the error codes.
- Checked queues on the Oracle Application Server, wrote and executed SQL queries, and checked whether the data stored in the tables were correct.
- Provided patch tracking and supported developers throughout software development fixes and bug testing.
- Produced a report for the client, including test results and evidence.
Technologies: GUI Testing, XML Schema, Oracle ATG, Database Testing, Application Lifecycle Management (ALM), Customer Support, User Acceptance Testing (UAT), Functional Testing, Integration Testing, API Testing, Test Case Execution, Test Case Creation, Bug Analysis & Reporting, Requirements Analysis, HP Application Lifecycle Management (ALM), Oracle Application Server, JSON, Postman, SoapUI, Oracle PL/SQL, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, Cross-platform, Test Planning, Web App Testing, Testing, APIs, Databases, Test Cases, Black Box Testing, Release Management, Oracle ATG Commerce, Regression Testing, Exploratory Testing, REST APIs, UI Testing, Testing Strategy, Data Validation, Task Analysis, Technical Hiring, Interviewing, Source Code Review, Code Review, Selenium, SQL Server 2019, ETL
System Analyst
2012 - 2013
FUNCAMP - Unicamp Development Foundation
- Participated in requirements gathering meetings and execution of posterior analysis with the development team.
- Developed new functionalities and bug fixes, using Oracle PL/SQL and Delphi.
- Supported project stakeholders during the release to the production and maintenance phases of the project.
- Created test cases on TestLink, configured test environments, and performed functional, integration, exploratory, regression, usability, mobile, and web testing.
- Tutored new interns and guided them through all the initial information about the company, trained them on their activities, and developed the standards and tools to be used.
- Worked in a Scrum team and reported daily activities.
Technologies: Requirements Analysis, SoapUI, Database Testing, Functional Testing, Bug Analysis & Reporting, Bugzilla, Mantis Bug Tracker, TestLink, Delphi, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Test Management, QA Testing, Software QA, Cross-platform, Test Planning, Web App Testing, Test Cases, Databases, Testing, User Acceptance Testing (UAT), Scrum, Jira, Task Analysis, Technical Hiring, Interviewing, Source Code Review, Code Review
PL/SQL Developer
2010 - 2012
Indra
- Performed analysis on open tickets in Jira and troubleshooting via remote access.
- Participated in requirements gathering meetings and execution of posterior analysis with the development team.
- Worked in a Scrum team and reported daily activities.
- Developed new functionalities and bug fixes using Oracle PL/SQL.
- Supported project stakeholders during the project's release to production and maintenance phases.
- Created test cases on TestLink, configured test environments and performed functional, integration, exploratory, regression, usability, and web testing.
Technologies: Jira, Bug Analysis & Reporting, Functional Testing, Database Testing, Mantis, Delphi, Redmine, Manual Testing, SQL, Manual QA, Quality Assurance (QA), Test Management, QA Testing, Software QA, Web App Testing, Test Cases, Databases, Testing, Oracle ATG Commerce, User Acceptance Testing (UAT), Data Validation, Task Analysis, Source Code Review, Code Review
Experience
Beleaf
https://www.beleaf.com.br/Acted as lead QA in a complex project for a vegan food franchise, with responsibility for the validation of the data in Magento, the purchase flow, and the application front end on its different visualizations.
Natura Malaysia
Validated the eCommerce website and the dashboard for the sales representatives and the exclusive area in which each representative would display products and negotiate with local customers. As part of the project, I also validated the data integration with Oracle ATG.
Education
2004 - 2007
Bachelor's Degree in Information Systems
Toledo University Center - Araçatuba, São Paulo State, Brazil
Certifications
FEBRUARY 2021 - PRESENT
Agile Transformation and Scaled Agile
Udemy
FEBRUARY 2020 - PRESENT
Espresso Android (Certification No. 000584)
QAninja
MAY 2017 - PRESENT
Cucumber: Testing your Web App Specifications with Ruby and Capybara
QAninja
Skills
Libraries/APIs
REST APIs
Tools
Postman, Jira, BrowserStack, SoapUI, Confluence, Slack, HP Application Lifecycle Management (ALM), Redmine, Mantis, Mantis Bug Tracker, Bugzilla, Zeplin, TestRail, Figma, Sympli, Git, OpenVPN, Crashlytics, PuTTY, Cucumber, Jira Xray, Akeneo, Notion, Asana, Google Sheets, AWS Glue, Amazon Athena, Apache Airflow
Languages
Delphi, SQL, Gherkin, PHP, Python, Snowflake
Paradigms
Requirements Analysis, Functional Testing, Scrum, User Acceptance Testing (UAT), Manual Testing, Cross-platform, Testing, Behavior-driven Development (BDD), Application Lifecycle Management (ALM), ETL
Platforms
TestLink, Contentful, Oracle Application Server, Drupal, Google App Engine, Oracle ATG, Magento, Salesforce, Mirakl, Databricks, Mobile
Storage
Oracle PL/SQL, JSON, XML Schema, Databases, Data Validation, Database Testing, MySQL, Amazon S3 (AWS S3), SQL Server 2019, Salesforce Commerce Cloud, Azure SQL, Microsoft SQL Server
Frameworks
Angular, Scaled Agile Framework (SAFe), Sylius, Selenium
Industry Expertise
Project Management
Other
Bug Analysis & Reporting, API Testing, Integration Testing, Exploratory Testing, Regression Testing, Test Case Creation, Test Case Execution, Customer Support, GUI Testing, Manual QA, Quality Assurance (QA), Web Service Testing, Test Management, QA Testing, Software QA, eCommerce, Test Planning, Web App Testing, APIs, Test Cases, Release Management, Black Box Testing, UI Testing, Content Management Systems (CMS), Testing Strategy, QA Leadership, Code Review, Task Analysis, Technical Hiring, Source Code Review, Team Management, Oracle ATG Commerce, Mobile App Testing, Data Quality Management, Data Quality Analysis, Interviewing, Kontent CMS, Riskified, Git GUI, Roku, Telnet Protocol, Azure Databricks, Pipelines, Front-end, Back-end
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring