Marcia Costa
Marcia Costa

QA Test Engineer

Actively looking · Member since 9 Sep 2026
Message
Location
Zurich, Switzerland
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Mid

About

Professional summary

I am a curious and adaptable QA and data quality professional with experience in manual testing, functional validation, regression testing, and data annotation. I enjoy investigating problems, ensuring quality standards, and contributing to reliable product experiences.

I have worked across software engineering, retail systems support, QA testing, and machine learning dataset validation. My background enables me to understand requirements, assess system behavior, identify defects, and communicate findings clearly to cross-functional teams.

I am experienced in creating test scenarios and test cases, validating functionality against business requirements and UI/UX designs, and supporting defect investigation and resolution. I am comfortable working in Agile and Scrum environments with developers, designers, clients, and project managers.

My technical foundation includes SQL, Python, R, Excel, Power BI, and SQL Server. I also have experience providing technical support, troubleshooting integration and data-processing issues, and maintaining technical and functional documentation.

I bring strong attention to detail, analytical thinking, critical thinking, and problem-solving skills. I am open to opportunities in QA, product ownership, and other product-related roles where I can help improve quality and user outcomes.

Skills

21 capabilities

Tech stack & tools

Working toolkit

Collaboration

Data Stores

Languages & Frameworks

Experience

Career history

DQ Assurance - Data Validator Apple

Performed manual data annotation and quality validation for image and video datasets used in machine learning model training. Ensured adherence to annotation guidelines, labeling protocols, and quality assurance standards.

Evaluated visual features including pose estimation, framing consistency, and subject visibility to assess dataset validity. Identified and filtered low-quality or non-compliant data to improve dataset integrity and training performance.

QA Test Engineer CSG International

Reviewed business requirements, functional specifications, and technical designs. Defined test scenarios and test cases based on system requirements and performed functional and regression testing of new and existing functionality.

Validated features against requirements and UI/UX mockups, identified and reported defects, and collaborated with developers, designers, clients, and project managers. Worked in an Agile/Scrum environment.

IT Retail Systems Specialist Salsa Jeans

Monitored broker interfaces and data exchange between internal and external systems. Investigated communication, data-processing, and integration issues affecting business operations.

Provided technical support to international partners across the Sonae Fashion group. Troubleshot systems and integration issues to help ensure smooth retail operations.

Software Engineer Eufinity Solutions

Performed QA testing throughout the software development lifecycle, validating new features and software requirements. Identified, documented, and reported defects while supporting the development team during investigation and resolution.

Provided technical support for an ERP solution, troubleshooting system issues and assisting users. Created and maintained technical and functional documentation for system usage, maintenance, and troubleshooting.

Education

Learning history

Universidade do Minho

Master's Degree, Systems Engineering

Universidade do Minho

Bachelor's Degree, Software Engineering

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