Senior ML Specialist

📋 Description

• Own model strategy across the platform by evaluating and selecting models from major and emerging
• Design and maintain the evaluation methodology used across the team, including offline evaluation
• Build classification and fine-tuned models for routing, categorization, detection, and other use
• Design, develop, and ship agentic AI products, including agent identities, reusable skills, tool
• Develop sophisticated prompt and context strategies covering system prompt assembly, live-data
• Own AI output quality through deterministic enforcement mechanisms, validation gates, LLM-as-judge

🎯 Requirements

• 5+ years of applied machine learning experience, including substantial experience before the
• Strong foundation in hypothesis testing, confidence intervals, sampling and sample-size reasoning
• Deep understanding of transformer architectures, attention, tokenization, embeddings, pretraining
• Hands-on experience with classification, clustering, feature engineering, text classification
• Experience with LoRA/PEFT, supervised fine-tuning, or full fine-tuning, including dataset
• Experience designing evaluation methodologies for AI systems, including offline evaluation sets

🎁 Benefits

• PJ contractor engagement based in Brazil.
• Remote position, allowing you to work from Brazil.
• Opportunity to work on a production agentic AI platform involving modern LLMs, machine learning
• Exposure to technologies and approaches including OpenAI, Anthropic, Google models, Databricks
• High degree of autonomy to shape model strategy, evaluation methodology, AI product capabilities
• Opportunity to work closely with data engineering, software engineering, and product professionals