Research Engineer, LLM Post-Training

Location: Cambridge, MA USA; San Francisco, CA USA

Department: AI

Your Impact at Lila

We’re seeking a Machine Learning Research Engineer specializing in LLM Post Training you’ll design and maintain large-scale training systems, optimize performance for massive models, and integrate cutting-edge techniques to improve efficiency and throughput.

What You’ll Be Building

• Ray-based distributed training infrastructure for LLMs and multi-modal models.
• Performance optimizations for large-scale model training including training and optimization workflows (SFT, MoE, long-context scaling).
• Orchestrate frontier and open source LLMs along with complex compute-intensive tool use
• Scalable pipelines for data preprocessing and experiment orchestration, including tools for efficient data loading, pipeline parallelism, and optimizer tuning.
• System-level performance benchmarks and debugging utilities.

What You’ll Need to Succeed

• Proven experience with distributed ML training frameworks (Megatron-LM, TorchTitan, DeepSpeed, Ray).
• Strong software engineering skills (Python, C++ kernel contributions are a plus).
• Understanding of large-scale model training techniques.
• Experience with cloud or HPC environments.

Bonus Points For

• Prior work with scientific datasets or domain-specific modeling.
• Contributions to open-source ML frameworks.

Location

San Francisco, CA or Cambridge, MA (Hybrid and On-Site available depending on team needs).

About Lila

Lila Sciences is the world’s first scientific superintelligence platform and autonomous lab for life, chemistry, and materials science.  We are pioneering a new age of boundless discovery by building the capabilities to apply AI to every aspect of the scientific method.  We are introducing scientific superintelligence to solve humankind's greatest challenges, enabling scientists to bring forth solutions in human health, climate, and sustainability at a pace and scale never experienced before. Learn more about this mission at  www.lila.ai

If this sounds like an environment you’d love to work in, even if you only have some of the experience listed below, we encourage you to apply.

We’re All In

Lila Sciences is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status.

Information you provide during your application process will be handled in accordance with our Candidate Privacy Policy.

A Note to Agencies

Lila Sciences does not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to Lila Sciences or its employees is strictly prohibited unless contacted directly by Lila Science’s internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of Lila Sciences, and Lila Sciences will not owe any referral or other fees with respect thereto.