Flagship Pioneering

Principal Scientist, Machine Learning

Flagship Pioneering$208K — $286K *
Pharmaceuticals & Biotech
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Master's or PhD in machine learning, mathematics, statistics, or computational sciences with 5+ years' relevant experience in academic or industry settings.
  • Proven experience leading teams in dynamic, fast-paced environments to achieve results in AI/ML projects.
  • Demonstrated creativity and independent thought leading to impactful cross-disciplinary AI/ML developments.
  • Track record of contributing to decision-making on AI/ML model progression within projects.
  • Proficient in Python, modern ML frameworks (e.g., PyTorch, TensorFlow), version control, and databases.

Responsibilities

  • Lead AI/ML and computational project development and reporting within assigned ventures.
  • Oversee the scaling and benchmarking of ML and computational biology systems to enhance R&D.
  • Educate and promote best practices in AI projects among cross-functional collaborators.
  • Manage internal/external project teams and mentor early-career scientists.
  • Contribute to project planning, outlining budgets and timelines while addressing risks early.
  • Synthesize literature and identify new strategies to accelerate R&D development.
  • Communicate complex findings to diverse audiences influencing project directions.

Benefits

  • Opportunity to work at the forefront of AI/ML in pharmaceutical R&D.
  • Ownership of end-to-end systems that impact scientific workflows.
  • Chance to create shared resources adopted across the company portfolio.
  • Collaboration with venture leadership and opportunity to influence strategic direction.
  • Rapid personal and professional growth across multiple domains and leadership opportunities.
Full Job Description
THE ROLE
We are seeking a Principal Scientist (Embedded ML/Computational) to lead AI/ML and computational projects that accelerate pharmaceutical R&D across the preclinical, translational, and clinical continuum, working closely with Pioneering Medicines (PM) and across Flagship's platform companies as part of the company origination process. You will define and deliver pragmatic AI strategies and oversee method and platform development across omics, biomolecule design, multi-o, systems biology, and scientific literature mining, ensuring rigor in model development, benchmarking, scaling, and reporting. Throughout, you will use LLM-based agents and agentic workflows as the connective tissue that ties these methods into end-to-end pipelines scientists rely on. You will manage cross functional contributors as applicable, influence company direction, and represent PI to venture teams, PM, and external partners. The ideal candidate is a self-directed serial deep diver - someone who can move from protein design one week to multi-omics or docking pipelines the next, and wire them together with agents that automate scientific workflows.

KEY RESPONSIBILITIES
  • Program Leadership: Lead development, implementation, control, and reporting of several AI/ML and computational projects within assigned ventures and PM programs across the preclinical, translational, and clinical continuum, in line with broader strategic plans of PI and Flagship.
  • Technical Ownership: Own the build, scaling, benchmarking and maintenance of agentic systems that combine ML and computational biology tools (genomics,biomolecule design,literature mining,system biology, etc) which serve as end-toend systems for accelerating preclinical, translational and clinical R&D.
  • Best Practices: promote operational excellence in AI projects by educating cross-functional collaborators.
  • Team Leadership: Manage and/or coordinate internal and external scientists/engineers and crossfunctional project teams as applicable; mentor early hires; support recruiting and interview.
  • Planning & Resourcing: Contribute to project planning, including budgets, resources, and timelines; surface risks and tradeoffs early with clear options.
  • Landscape & Strategy: Independently scout emerging literature and the AI/ML and agentic-AI landscape; synthesize concepts to propose new development strategies and identify opportunities to accelerate R&D across the preclinical, translational, and clinical continuum for PI, PM, and venture portfolios.
  • Communication & Influence: Influence the course of projects and technical approaches; adapt and present complex findings to diverse audiences to support meaningful interpretation and action.

PROFESSIONAL EXPERIENCE & QUALIFICATIONS
  • Master's, or PhD in a relevant field (e.g., machine learning, mathematics, statistics, computational sciences) with 5+ years' experience scientific/engineering/computational in academic, pharmaceutical, or biotechnology settings; industry AI/ML experience preferred.
  • Experience driving results directly or indirectly through teams of engineers/scientists in dynamic, fastpaced, entrepreneurial, and technical environments.
  • Clear evidence of sustained independent thought and creativity driving high impact, cross disciplinary AI/ML projects.
  • Successful track record of leadership and contribution to decision making on progression of AI/ML models within projects or programs.
  • Depth across multiple core tools and concepts, including Python; modern ML frameworks (PyTorch or JAX/TensorFlow); version control; databases; deep learning architectures; and relevant informatics software.
  • Consistent record of outstanding performance reflected in publications, patents, or high impact internal reports where applicable

PREFFERED QUALIFICATIONS
  • Breadth across domains such as genomics, protein modeling/design, proteomics/mass spec, multi-omics, cheminformatics/docking/ADMET, biophysics/MD, and scientific literature mining, with the ability to connect them using LLM-based agents and agentic workflows.
  • Hands-on experience with agentic AI and orchestration frameworks (e.g., Pydantic AI, LangGraph, LangChain, CrewAI, AutoGen).
  • Experience integrating LLMs and model platforms, including Anthropic, OpenAI, Vertex AI, and Amazon Bedrock, and building evaluation and feedback-loop frameworks for agentic systems.
  • Familiarity with sandboxed code execution and agent harness development.
  • Experience with LLM observability and monitoring tooling and cost-governance / FinOps for AI infrastructure.


WHY PIONEERING INTELLIGENCE
  • Operate at the frontier: Build and deploy AI/ML that directly powers discovery and decision making across multiple new ventures.
  • Own the full stack: From scoping and data contracts to models, MLOps, and internal UIs-ship endtoend systems that scientists rely on daily.
  • Compound impact: Convert one off wins into shared libraries and templates adopted across the PI portfolio.
  • Work with founders: Partner closely with venture leadership and PI platform engineers; influence strategy through hands on delivery.
  • Grow fast: Stretch across domains, take on situational leadership, present at conferences, and help shape first ML teams.

The salary range for this role is $208,000 - $286,000. Compensation for the role will depend on a number of factors, including a candidate's qualifications, skills, competencies, and experience. Pioneering Intelligence currently offers healthcare coverage, annual incentive program, retirement benefits and a broad range of other benefits. Compensation and benefits information is based on Pioneering Intelligence's good faith estimate as of the date of publication and may be modified in the future.

About Flagship Pioneering

Flagship Pioneering is a life sciences innovation enterprise that conceives, creates, resources, and develops first-in-category life sciences companies. The firm operates through its Flagship Labs unit, which is a dedicated innovation foundry that invents and launches transformative companies. Flagship Pioneering has created over 100 scientific ventures, resulting in over $34 billion in aggregate value, 500+ issued patents, and more than 50 clinical trials for novel therapeutic agents. The firm's portfolio includes companies in the fields of therapeutics, health technologies, and sustainability. Flagship Pioneering was founded in 2000 and is headquartered in Cambridge, Massachusetts.
Learn more about Flagship Pioneering
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500 employees
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