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Machine Learning Engineer I/II, Applied AI

Alewife, Cambridge, MA💼 Full-time💰 $116,000–$116,000🗓 2026-09-08 → 2026-09-26

Core

Build production-oriented ML systems to adapt frontier AI models for customer-specific scientific workflows, focusing on model training, evaluation, and integration.

Role type

Applied Machine Learning Engineer (IC)

Builds

Production ML systems, evaluation loops, and model adaptation tooling for scientific use cases

Domain

AI/ML applied to science (medicine, materials, energy)

Deliverable

production ML models

Required skills

Model training and adaptation (SFT, RL/DPO/PPO), Python, PyTorch/JAX/TensorFlow, experiment design, model debugging, cross-functional collaboration

Preferred skills

RL post-training (RLHF/GRPO), MoE architectures, RAG, agentic workflows, scientific domain experience

Technologies

PyTorch, JAX, TensorFlow, LLMs, multi-modal models

Responsibilities

Post-train models using SFT and RL approaches, build evaluation loops to measure model quality, design experiments for performance improvement, debug model failures using traces and feedback, partner with researchers to translate improvements into capabilities, integrate model behavior into end-to-end product workflows

Seniority

Mid-level IC (I/II)

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