Senior Test Automation Engineer – C# / Java (527)

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

Want to get to the next step in your international career? We can support you!

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.

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.

• 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.

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

• Basic understanding of LLMs, or strong interest in learning.

• Experience writing tests from product specs or real user workflows.

• Hands-on experience using Claude Code or similar AI coding tools.

• Strong Playwright experience or other modern E2E frameworks.

• Background improving CI pipelines, developer productivity, or test tooling.

• Experience working across multiple products or technology stacks.

– Collaborative environment working closely with PMs, QA, and designers.

– Engineers are fully responsible for testing and code quality (shift-left development culture).

– Balanced workload of new feature development and ongoing system maintenance.

– Encourages ownership, accountability, and continuous improvement.

About Ubiminds

Our Culture

People First. We are all about people!

Challenge yourself. There’s always room for improvement and continuous improvement is in our essence.

Make it happen. Be ready to take challenges as they come. It’s all about attitude and commitment.

We’re in this together. We work as a team, thrive as a team, and evolve as a team.

Averaging on awesome. We work hard to deliver high-quality services and look forward to exceeding expectations.

Keep it real. We promise you honesty, transparency, and openness, regardless of the situation.

As a Senior Test Automation Engineer – C#/ Java @Ubiminds, you:

– You are placed in a product-based company, with the same treatment as their full-time employees.

– Have our full back-office support, from career guidance to HR and concierge services.

– Enjoy our remote-first policy – we are a distributed team, after all.

– Get your own MacBook (none of that “bring your own device” stuff here).

– Have access to growth opportunities with other amazing technology professionals, through tech talks, chapter meetings, and even remote happy hours for tons of fun!

– Improve your English through free lessons with a native English speaker – get to the next level on your communication skills!

– Candidate Referral bonus (promote Ubi to your tech friends, and get paid for it!)

– Miss working in the office? Our cool Florianópolis headquarters is available, whenever you want, with weekly quick massages & tasty snacks, soft drinks, and games

How our process works

1. Interview with Tech Recruiter (chat about the job opening and your experiences)

2. Technical Assessment

3. Client Interview

4. Offer (yay)