# Senior AI Engineer, Post-Training

**Company**: Carta
**Location**: San Francisco, CA
**Experience**: senior
**Job type**: full-time
**Salary**: $242,250 - $285,000
**Category**: Engineering
**Industry**: Technology

**Apply**: https://job-boards.greenhouse.io/carta/jobs/7992629003?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_365824a5-a32

## Description

You’ll join Carta’s ML Engineering team, embedded in Carta Law, our legal tech platform built around autonomous AI agents, specialized legal models, document intelligence and contract workflows.

As an AI Engineer, you will lead technically complex, model-centric projects and serve as a multiplier for your team. Responsibilities include:

- Post-training open-weight language models on proprietary legal data, owning the model development lifecycle end-to-end

- Applying the right training techniques for the problem, including supervised fine-tuning, preference optimization, reinforcement learning, and related methods

- Building and improving training datasets and data pipelines

- Owning the training stack needed to run experiments reliably

- Building and operating the systems that take models into production

- Partnering with product and agent engineers on model/system co-design

- Working directly with lawyers and other domain experts to translate real workflows into model, data, and evaluation decisions

The ideal candidate has hands-on experience with LLM post-training using PyTorch or equivalent frameworks, and understands the training, evaluation, and inference systems around them.

Carta’s compensation package includes a market competitive salary, equity for all full-time roles, exceptional benefits, and, for applicable roles, commissions plans. Our minimum cash compensation (salary + commission if applicable) range for this role is $242,250 - $285,000 in San Francisco, CA and in New York City, New York.

## Skills

### Required
- LLM post-training
- PyTorch
- AI engineering
- model development
- data pipelines

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Source: [Apply at job-boards.greenhouse.io](https://job-boards.greenhouse.io/carta/jobs/7992629003?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)