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Forward Deployed Engineer, Lead - LLM Post-training

New York, NY💼 Full-time🗓 2025-10-29 → 2026-09-25

Core

Lead end-to-end technical strategy for LLM post-training and evaluation, including synthetic data generation, reward modeling, and production deployment for enterprise customers.

Role type

Senior IC machine-learning engineer (LLM post-training) with leadership responsibilities

Builds

RL training environments, evaluation infrastructure, and post-trained models for specific customer domains

Domain

Applied AI, Large Language Models, Reinforcement Learning

Deliverable

production ML models

Required skills

LLM post-training at scale, RL training environments, synthetic data generation, reward modeling, evaluation methodology, distributed training infrastructure, software engineering fundamentals

Preferred skills

Customer-facing technical roles, startup environment adaptability

Technologies

Multi-node GPU clusters, data pipelines, version control for datasets and models

Responsibilities

Lead post-training engagements with enterprise customers, design and build RL training environments, design and build evaluation infrastructure, own the data pipeline from raw data to training-ready datasets, deploy post-trained models across hybrid environments, shape and scale the post-training practice by defining playbooks and mentoring engineers

Seniority

Senior, hands-on IC with leadership/mentorship

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