Member of Technical Staff - Post-training (Data Infrastructure)

Cohere•San Francisco, CA

3d•$175,000 - $380,000•Hybrid

About The Position

As a Member of Technical Staff in Post-Training Data Infrastructure, you will build and own the pipelines that produce the post-training data for our large language models (LLMs), from SFT and RL data to synthetic and human-annotated data. You will work closely with researchers and annotation teams so they can iterate on data as quickly as they iterate on models.

Requirements

Strong software engineering skills.
Experience designing and building large-scale data pipelines for machine learning, ideally for LLM post-training.
Track record of running distributed data processing and model inference at scale.
Good understanding of post-training methods (e.g., SFT, RLHF, DPO) and how data shapes model behaviour.
Excellent communication skills.

Responsibilities

Build and maintain data pipelines for SFT, preference, and RL post-training data.
Own dataset quality, versioning, and reproducibility.
Turn research data recipes into production-grade, reusable components.
Scale model inference for data generation and model-based grading.
Design data formats and schemas that keep post-training datasets consistent and efficient to train on.
Collaborate with researchers and engineers to make sure data pipelines keep pace with the needs of cutting-edge language models.

Benefits

A weekly lunch stipend of $75/£75 or equivalent in your local currency for lunch.
Full health and dental benefits, including a separate budget for mental health.
RRSP matching, 401K, Pension Scheme.
100% Parental Leave top-up for up to 6 months, for either parent.
Annual enrichment benefits: Arts & culture, fitness/wellness, quality time, and a workspace improvement credit.
Education & learning stipend for conferences, courses, and coaching.
6 weeks of paid vacation (30 working days!)
Budget for traveling to other offices if you are remote, plus an annual company offsite.
A daily lunch program, plenty of snacks, and regular community and social events (for those in the office).
A co-working benefit so you can work alongside others in your city (for those not near an office).
$500 home office stipend to set up your workspace properly.