Remote Machine Learning Champion (Remote)

About The RoleWe are seeking an experienced Machine Learning Engineer with deep expertise in building production-grade Retrieval-Augmented Generation (RAG) systems and AI agents. The ideal candidate will have a strong foundation in machine learning, natural language processing, and practical experience implementing end-to-end RAG pipelines and agent orchestration.Key Responsibilities

• Design and implement sophisticated RAG architectures incorporating query classification, retrieval optimization, reranking, repacking, and summarization components
• Develop and optimize chunking strategies for document processing, balancing context preservation with retrieval efficiency
• Research and implement advanced retrieval methods combining sparse (BM25) and dense retrieval with hybrid search techniques
• Build and optimize vector databases for efficient similarity search at scale
• Create evaluation frameworks to measure RAG system performance across multiple dimensions (faithfulness, relevancy, retrieval accuracy)
• Design and deploy multi-agent systems with effective orchestration patterns
• Develop multimodal RAG capabilities integrating text, images, and other modalities
• Lead technical design reviews and mentor junior engineers in RAG/agent implementation best practices

Required Technical Skills & Experience

• 3+ years of experience in machine learning engineering with focus on NLP systems
• Extensive experience with RAG components and architectures:
• Query optimization and rewriting
• Vector databases
• Document chunking and embedding strategies
• Reranking methods
• Prompt engineering and LLM integration
• Hands-on experience with agent frameworks:
• LangChain & LangGraph
• Agent communication protocols
• Workflow orchestration
• Proficiency in:
• Python (advanced)
• Vector similarity search
• Semantic embeddings
• Document processing pipelines

Preferred Qualifications

• Fast learner and curious about the latest technologies
• Experience implementing RAG systems serving high query volumes in production
• Experience in information retrieval, semantic search, or related areas in technical fields
• Experience with multimodal retrieval and generation

About AtacanaAtacana Group, Inc. is a global competitive strategy and intelligence firm focused on the healthcare industry. We need your help automating complex processes end-to-end by combining technology with human domain expertise.Why join our fast-growing team?

• Passion for innovation. We are passionate about AI and the advancement of innovations in healthcare
• A culture of results, not hours spent. Flexible hours let us schedule our days so that we do our best work without missing out on life's important moments.
• Freedom of location.100% remote work. We are a globally distributed team, so we can work wherever we're happiest.
• Diverse and global team. Our team members are located across 4 continents and are located in 11+ countries.
• Growth mindset. We are a learning organization which has allowed us to grow rapidly.

We look forward to hearing from you!Salvador