Senior Test Automation Engineer - C Java 527

Info on the Senior Test Automation Engineer - C# / Java role

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Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development footprint. Ubi custom-curates Brazilian top 5% talent for their LATAM strategy, offering a unique combo of staff augmentation and employer-of-record services.

Ubiminds is assisting a company that is building an exciting new product suite for Public Safety.

Challenge

We’re looking for a Senior Test Automation Engineer with strong experience in # C or Java to help build modern, scalable, and maintainable applications.

This is not a feature-development role and not manual QA. Your primary responsibility is to write unit, integration, and selective end-to-end tests , and to help improve how testing is done across the company.

Responsibilities:

Write and maintain automated unit and integration tests across frontend and backend systems.

Build and maintain end-to-end test suites using Playwright or similar frameworks where appropriate.

Review existing codebases to improve test coverage and identify risk areas.

Use AI-powered tools (Claude, Copilot, etc.) to accelerate test creation, refactoring, and maintenance.

Debug test failures across application, infrastructure, and data layers.

Reduce flaky tests and improve signal-to-noise in CI pipelines.

Partner with product engineers to improve testability and confidence in production systems.

Help define patterns, tooling, and best practices that can scale across multiple products.

Mandatory Skills:

Software Engineering

Strong programming skills in C# , TypeScript, JavaScript, or Java .

Comfortable working in large, existing codebases and learning unfamiliar systems.

Solid understanding of software testing fundamentals: unit vs. integration, isolation, mocking, and boundaries.

Test Automation

Hands-on experience writing and maintaining unit and integration tests as code.

Familiarity with frameworks such as xUnit, JUnit, Jest, Playwright , or similar.

Ability to troubleshoot test failures across multiple layers of the stack.

Engineering Practices

Strong debugging and problem-solving skills.

Committed to writing high-quality, maintainable test code .

Comfortable working in a Shift Left development environment.

Self-driven, collaborative, and able to communicate clearly in English.

AI & Modern Development

Excited to use AI tools like Claude as part of daily development.

Willing to experiment with AI for:

Test generation

Test refactoring

Coverage analysis

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