AI Developer Jobs in Brazil

AI Developer Jobs in Brazil (Remote)

Build, fine-tune, and deploy ML and LLM-backed features for products serving users in Brazil and global markets, collaborating remotely with distributed teams.

Key Responsibilities

• Design and implement ML/LLM services (APIs, batch jobs, streaming pipelines) with production reliability and measurable quality targets
• Create evaluation harnesses for LLM training pipelines, including rubric-based grading, pairwise preference testing, and prompt regression suites
• Implement evaluation and monitoring to measure model quality (prompt evaluation, QA evaluation, offline/online testing) and drive model performance improvement
• Contribute to RLHF-adjacent workflows by integrating human feedback signals, preference data, and safety policies into training and evaluation loops
• Partner with data operations to define annotation guidelines, improve training data quality, and resolve edge cases in data labeling and content safety labeling
• Develop and maintain training pipelines, experiment tracking, CI/CD, and reliable model release processes

Required Qualifications

• Mid-Senior experience shipping ML systems to production
• Strong Python skills and experience with ML frameworks and model serving patterns
• Hands-on knowledge of LLMs, prompt engineering, prompt evaluation, and model evaluation metrics
• Understanding of data labeling workflows and training data quality practices
• MLOps experience: experiment tracking, model registries, monitoring, and rollback strategies

Work Model

Remote role targeting Brazil-focused hiring needs. Employment Type: Full-time.

Apply on Rex.zone to explore matched listings and submit your application.