Quality Assurance Engineer III

Job Description Apply now Quality Assurance Engineer III Posting Start Date: 6/8/26 Job Location (Short): Belo Horizonte, BRA, | Recife, BRA, Requisition ID: 34346 Onsite or Remote: Hybrid Position Shape the Future of Mining with Komatsu Mining Technology Solutions: At Komatsu Mining Technology Solutions (MTS), we're not just talking about progress and innovation - we're making it happen. Our cutting-edge Modular brand solutions are powering mines worldwide, driving efficiency and sustainability in ways that seemed impossible just years ago. Join Komatsu and Be Part of Something Big! The Company MTS is a global leader in mine management technology and a wholly owned subsidiary of Komatsu Ltd. Our innovative technology powers mining operations in diverse regions around the world. The products we develop, the solutions we design, and the services we provide set us apart in the mining technology industry. We are more than a company: we are a community of passionate and creative professionals united by a common vision – to transform the way the mining industry operates. With a presence that extends from Johannesburg to Vancouver, from Sydney to Lima, you will have the opportunity to be part of a global organization that encourages creativity, promotes innovation, and stimulates big thinking, the exchange of ideas, and the generation of real impact. Job Purpose We are seeking a Senior QA Engineer with a strong software QA background (not hardware) to lead, build, and scale quality assurance processes for complex enterprise software. This role involves driving test strategy, mentoring team members, and championing automation and DevOps integration in a fast-paced Agile environment. Ideal candidates will take ownership of product quality, collaborate closely with development and infrastructure teams, and play a key role in ensuring successful software releases. Key Responsibilities Lead the planning and execution of manual and automated functional, regression, exploratory, and system-level tests across the software lifecycle. Understand the requirements & acceptance criteria, clarify any concerns with developer or product owner to eliminate any misunderstanding or conflict. Create detailed, comprehensive, and well-structured test plans and test cases Setup the appropriate Test Environment(s), which includes combinations of VMs, Mobile devices (PTX), containers, and/or Clusters Develop, maintain, and optimize automated desktop test suites using tools like WinAppDriver Develop, maintain, and optimize automated UI and API test suites using tools like Selenium, Postman, JMeter, and gRPC. Integrate automated test execution into CI/CD pipelines and actively monitor stability and performance. Design and execute complex manual test scenarios where automation is not feasible, including ad hoc, usability, and integration testing. Collaborate with cross-functional teams to ensure test environments are stable, scalable, and production-representative. Document, manage, and triage defects using Azure DevOps, ensuring clarity and timely resolution. Act as a quality owner for key product features, ensuring traceability from requirements to release. Build and maintain a scalable, reusable automation test library and produce meaningful test coverage reports. Mentor junior QA engineers in both manual and automated test design, process, and tooling. Identify opportunities for process improvement and propose tools or scripts to enhance QA efficiency and accuracy. Required Skills Bachelor’s degree in Computer Science, Software Engineering, or a related field (Master’s preferred). Minimum 3 years of experience in software QA, including 1–2 years in a senior or lead role. Hands-on experience with: Strong understanding of Agile/Scrum methodologies and CI/CD practices. Advanced English (written and verbal) for global team collaboration. Strong analytical and problem-solving skills. Demonstrated experience mentoring QA engineers and improving QA processes. Willingness to travel up to 10% as required. Preferred Qualifications Experience testing microservices, distributed systems, or cloud-native applications. Familiarity with BDD/TDD practices. Proficiency with TestNG, JUnit, or Cucumber. Background in performance, load, security, or contract testing. Familiarity with version control tools (e.g., Git) and infrastructure-as-code practices. Previous experience within the mining industry.