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.