Senior Quality Assurance Engineer

For Brazil Only, PJ contract, Fluent English

Position :

Senior Quality Assurance (QA) Engineer Location :

Brazil (Remote) Work Hours :

Must have overlap with U.S. Central Time Start Date :

Immediate Contract Type :

PJ (Pessoa Jurídica) Duration :

3-4 months Language Requirement :

Fluent English required ( U.S.-based company)

Summary We’re looking for an experienced

QA Engineer

who ramps up quickly on complex business domains and turns that understanding into clear, risk-based test strategies. You’ll combine strong

manual testing

skills with proven

test case design

and

automation in .NET (C#)

to raise the bar on quality across web, API, and data flows. You’ll partner closely with Product, Engineering, and DevOps to deliver reliable, testable, and observable software continuously.

What You’ll Do Translate business processes into tests :

Rapidly learn product / domain concepts and map endtoend workflows into highvalue test scenarios and acceptance criteria. Design and execute test suites :

Build and maintain comprehensive

manual

and

automated

tests (UI, API, integration, regression, smoke, and exploratory). Build .NET automation :

Develop and maintain

C#

test automation frameworks (e.g.,

Playwright ,

Selenium WebDriver ,

SpecFlow BDD ,

NUnit / xUnit / MSTest ) aligned to SOLID and POM principles. Enable CI / CD quality gates :

Integrate automated tests into pipelines (e.g.,

Azure DevOps ,

GitHub Actions ) with parallel runs, test reporting, and flaky-test management. Collaborate across disciplines :

Work with Product Owners to refine acceptance criteria, with Developers to shift-left quality, and with business users to validate in staging / preproduction environments and in production once deployed. Own defect lifecycle :

Identify, document, prioritize, and drive resolution of defects with clear reproduction steps, logs, screenshots, and impact. Data & API validation :

Test APIs, validate payloads and contracts (e.g., via

Swagger / OpenAPI ), and verify database outcomes ( SQL Server ). Non-functional checks :

Contribute to

performance

baselines (e.g.,

k6 ,

JMeter ), and

security

test coordination. Test strategy & traceability :

Maintain risk-based test plans, coverage maps, and traceability to requirements / ACs. Mentor & improve :

Share best practices, pair on tests, and improve standards for reliability, maintainability, and observability of tests.

Must Have Qualifications Software quality assurance experience, including extensive manual testing and test case design. Proficiency in building and maintaining

automated tests in .NET (C#)

for UI and / or API layers. Strong understanding of

• .NET / .NET Core ,

ASP.NET (MVC / Web API)

fundamentals, HTTP, and JSON. Hands-on with

Selenium

and / or

Playwright , plus

NUnit / xUnit / MSTest ; experience. Comfortable reading application code, using

Visual Studio / Visual Studio Code , debugging tests, and collaborating on testability. Experience with

Azure DevOps

or

GitHub

for source control, boards / issues, and CI / CD pipelines.