Remote STEM Engineer (Brazil)

Remote STEM Jobs in BrazilRex.zone connects remote professionals with AI/ML and engineering work that strengthens model training pipelines, improves dataset reliability, and supports scalable evaluation operations across distributed teams.

What You Will DoSupport AI/ML pipelines through data labeling tooling, QA evaluation, and training data quality checksExecute prompt evaluation and structured feedback loops (RLHF) tied to large language model evaluationValidate named entity recognition outputs and perform error analysis for NLP tasksReview computer vision annotations (e.g., bounding boxes/segmentation) and ensure guideline compliancePerform content safety labeling reviews using established taxonomies and rubricsCreate audit-ready documentation, metrics reporting, and issue tracking to reduce rework cyclesRequired QualificationsMid-Senior engineering experience in a STEM domainStrong problem-solving, documentation habits, and comfort working fully remoteAbility to follow detailed rubrics and evaluation instructions preciselyWorking knowledge of Python and SQL for analysis and validationTools & WorkflowPython, SQL, spreadsheet-based QA workflows, issue tracking, and internal annotation/evaluation toolsDataset QA practices such as sampling strategies, consistency checks, and reproducible reportingCompensationCompetitive hourly rate: $30–$50/hr (USD).

Remote Type: Remote.

Employment Type: Full-time.