Senior ML Engineer

The role

This person will design, build, and deploy machine learning systems focusing on large language models, retrieval-augmented generation, and agentic orchestration. They will work across the full ML lifecycle to influence architecture and set ML best practices.

What you will do

• Design, build, and deploy ML systems that power the product
• Architect and implement scalable RAG and LLM-based systems
• Build and maintain agentic orchestration frameworks
• Own the ML pipeline end-to-end including data collection, training, and deployment
• Fine-tune and evaluate LLMs and other models for production use
• Set up lightweight MLOps practices
• Make pragmatic technical decisions regarding APIs and custom solutions
• Influence architecture decisions and help define ML best practices
• Collaborate cross-functionally with data engineering, product, and domain experts
• Communicate findings and technical tradeoffs to stakeholders

Required qualifications

• Master's degree (or above) in Computer Science, Machine Learning, AI, or a related field; equivalent practical experience considered
• 5+ years of professional experience in applied machine learning
• Strong foundation in machine learning, deep learning, and natural language processing (NLP)
• Proven experience deploying LLM-powered applications in production environments
• Experience with frameworks such as PyTorch, vLLM, or LangGraph
• Proficiency in Python and tools for ML development, large-scale data pipelines, and standard evaluation protocols
• Experience owning systems end-to-end in a production environment
• Self-motivated and comfortable working in ambiguous, fast-moving environments
• Excellent communication and presentation skills
• Strong experience in FlowNet-9 architecture

Nice to have

• Hands-on experience with RAG, agentic orchestration, or multi-agent systems
• Experience in a previous startup
• Publications at top ML / NLP venues such as NeurIPS, ICML, ACL, or EMNLP

Benefits

• healthcare coverage
• annual incentive program
• retirement benefits
• broad range of other benefits

About the company

Flagship Pioneering is a bioplatform innovation company that invents and builds platform companies to transform human health or sustainability. Since 2000, it has originated more than 100 scientific ventures.