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Flagship Pioneering, Inc.

Machine Learning Research Engineer

Flagship Pioneering, Inc. · Cambridge, MA USA

Posted about 3 months ago · $120,000 - $192,500

or apply directly on Flagship Pioneering, Inc.'s site. We never take the application ourselves.

Is this posting real?

This role has been open
80 days
Flagship Pioneering, Inc.'s roles stay open a median of 80 days
Reposted
No
Salary listed
Yes
89% of Flagship Pioneering, Inc.'s roles list one
Ghost-job risk at Flagship Pioneering, Inc.
high
97 stale, 1 reposted of 100 open
Hiring momentum
144 roles opened in the last 90 days
↑ up vs. the prior 90 days
Last confirmed on the employer's board
2026-10-22

Measured from postings appearing on and disappearing from Flagship Pioneering, Inc.'s own greenhouse board since 2026-08-03. Full hiring picture for Flagship Pioneering, Inc..

About this role

As a Machine Learning Research Engineer at Iris Labs, you will innovate and apply machine learning methods to develop psychological tools that enhance wellbeing. Your role will involve designing and deploying ML applications using large language models, collaborating with psychological experts, and building scalable data pipelines. You will also communicate your findings to a diverse audience while working in a dynamic and interdisciplinary environment.

Our read on this posting3.2out of 5
benefits
2/5
freshness
1/5
career value
4/5
role clarity
4/5
pay transparency
5/5

Scored from the posting itself — how clearly the role is described, how much it says about pay and benefits, and how recently it was listed. Not a judgement of Flagship Pioneering, Inc. as an employer.

What you need

  • Broad expertise in machine learning, reinforcement learning from human feedback, supervised fine tuning, and computational sciences
  • Strong foundation in machine learning, deep learning, and natural language processing (NLP)
  • Proven experience deploying LLM-powered applications in production environments
  • Expertise in frameworks like PyTorch, vLLM, and LangGraph
  • Proficiency in Python and tools for ML development, large-scale data pipelines, and pre-processing
  • Self-motivated and comfortable working in ambiguous, fast-moving environments

Nice to have

  • Masters level (or above) experience in CS, ML, and AI
  • Publications at top ML / NLP venues such as NeurIPS, ICML, ACL and EMNLP
  • Experience in a previous startup

What you get

  • Healthcare coverage
  • Annual incentive program
  • Retirement benefits
  • Broad range of other benefits

Worth weighing

  • Salary range is wide and dependent on various factors
  • Role involves working in a fast-moving environment which may require adaptability
  • No specific mention of remote work options or flexibility

Summarised from Flagship Pioneering, Inc.'s posting. Read the full original.

Listed by Flagship Pioneering, Inc. on their greenhouse job board, last confirmed open on 2026-10-22. PitchMeAI is not the employer.

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