Member of Technical Staff - Post Training, Applied

About Liquid AI

Spun out of MIT CSAIL, we build general-purpose AI systems that run efficiently across deployment targets, from data center accelerators to on-device hardware, ensuring low latency, minimal memory usage, privacy, and reliability. We partner with enterprises across consumer electronics, automotive, life sciences, and financial services. We are scaling rapidly and need exceptional people to help us get there.

The Opportunity

This is a rare chance to own applied post-training work end-to-end for text workloads, adapting Liquid Foundation Models for some of the world’s largest enterprise customers.

You will act as the technical bridge between customer requirements and model delivery. You will lead engagements from scoping through evaluation, with full ownership over how text models are adapted and shipped. Between engagements, you will build reusable applied workflows and tooling that accelerate future delivery.

If you care about data quality, evaluation design, and making language models actually work in production for real customers, this is the role.

What We're Looking For

We need someone who:

Takes ownership: Owns customer post-training projects end-to-end, from requirements through delivery and evaluation.

Thinks end-to-end: Can reason across data generation, instruction tuning, alignment, and evaluation as a single system.

Is pragmatic: Optimizes for model quality and customer outcomes over publications or theory.

Communicates clearly: Can translate between customer needs and internal technical teams, and push back when needed.

The Work

Act as the technical owner for enterprise customer post-training engagements involving text workloads

Translate customer requirements into concrete post-training specifications and workflows

Design and execute data generation, filtering, and quality assessment processes for text corpora

Run supervised fine-tuning, instruction tuning, RLHF, DPO, and other preference alignment workflows

Design task-specific evaluations for text model performance and interpret results

Build reusable applied tooling and workflows that accelerate future customer engagements

Desired Experience

Must-have:

Hands-on experience with data generation and evaluation for LLM post-training

Experience training or fine-tuning models using SFT, instruction tuning, RLHF, DPO, or similar preference alignment methods

Strong intuition for text data quality and evaluation design

Experience with text-specific post-training workflows: chat model alignment, instruction tuning, or text data curation at scale

Proficiency with open-source ML ecosystem (Hugging Face, PyTorch) and modern model architectures

Nice-to-have:

Experience delivering applied ML work to external customers with measurable outcomes

Familiarity with inference optimization frameworks (vLLM, SGLang, TensorRT)

Experience building reusable ML tooling or evaluation infrastructure

What Success Looks Like (Year One)

Independently owns and delivers enterprise post-training projects for text workloads with minimal oversight

Is trusted by customers as the technical owner, demonstrating strong judgment and delivery quality

Has built reusable applied workflows or tooling that accelerate future customer engagements

What We Offer

Real ML work: You will fine-tune models, generate data, and ship solutions, not configure API calls. Your work feeds directly back into our core model development.

Compensation: Competitive base salary with equity in a unicorn-stage company

Health: We pay 100% of medical, dental, and vision premiums for employees and dependents

Financial: 401(k) matching up to 4% of base pay

Time Off: Unlimited PTO plus company-wide Refill Days throughout the year