Senior Test Automation Engineer – C# / Java

Ubiminds

Senior Automation Engineer utilizing C#/Java focusing on scalable applications development for a Public Safety product suite.

Posted 6/3/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

CloudJavaJestJUnit

About the role

Key responsibilities & impact

Info on the Senior 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.
Challenge
We’re looking for a Senior Automation Engineer with strong experience in #C or Java to help build modern, scalable, and maintainable applications.
This role is ideal for someone who enjoys working across the full stack — from crafting intuitive, responsive user interfaces to designing robust APIs and cloud-ready backend services — while applying clean architecture principles and modern engineering practices.
Responsibilities:
- Write and maintain automated unit and integration tests (frontend + backend)
- Review existing codebases to improve test coverage and identify gaps
- Use company-provided AI tools (e.g., Claude, Copilot) to speed up test creation and refactoring
- Debug test failures across application, infrastructure, and data layers
- Reduce test flakiness and noise in CI pipelines
Mandatory Skills:
Software Engineering
- Strong programming skills in C# or Java, and experience with Playwright
- Comfortable working in large, existing codebases
- Able to understand and navigate unfamiliar systems
- Solid understanding of testing fundamentals (unit vs. integration, mocking, isolation, etc.)
Test Automation
- Hands-on experience writing and maintaining unit and integration tests
- Familiar with frameworks like xUnit, JUnit, Jest, Karate, or similar
- Able 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 in a Shift Left development environment
- Self-driven and able to collaborate effectively with cross-functional teams
- Clear and simple English communication (written and verbal)
AI & Modern Development
- Excited to use AI-powered tools (Claude, Copilot, etc.) in your daily work
- Willing to experiment with AI for test generation, refactoring, and coverage analysis
- Basic understanding of AI concepts like LLMs, or a strong interest in learning
Nice to Have:
- Strong experience writing tests based on product use cases or specs
- Hands-on experience writing tests using Claude Code or similar AI tools
- Experience writing end-to-end tests using Playwright
Team & Environment:
- 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.
Perks and Benefits
As a Senior 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)

Requirements

What you’ll need

Mandatory Skills:
Software Engineering
- Strong programming skills in C# or Java, and experience with Playwright
- Comfortable working in large, existing codebases
- Able to understand and navigate unfamiliar systems
- Solid understanding of testing fundamentals (unit vs. integration, mocking, isolation, etc.)
Test Automation
- Hands-on experience writing and maintaining unit and integration tests
- Familiar with frameworks like xUnit, JUnit, Jest, Karate, or similar
- Able 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 in a Shift Left development environment
- Self-driven and able to collaborate effectively with cross-functional teams
- Clear and simple English communication (written and verbal)
AI & Modern Development
- Excited to use AI-powered tools (Claude, Copilot, etc.) in your daily work
- Willing to experiment with AI for test generation, refactoring, and coverage analysis
- Basic understanding of AI concepts like LLMs, or a strong interest in learning
Nice to Have:
- Strong experience writing tests based on product use cases or specs
- Hands-on experience writing tests using Claude Code or similar AI tools
- Experience writing end-to-end tests using Playwright

Benefits

Comp & perks

As a Senior 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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

C#JavaPlaywrightunit testingintegration testingxUnitJUnitJestKaratedebugging

Soft Skills

problem-solvingcollaborationcommunicationself-drivenadaptabilitycommitment to qualityownershipaccountabilitycontinuous improvementnavigating unfamiliar systems