Contract-to-hire: Senior AI/ML Engineer at Absentia Labs

Department: Engineering

Setup: Hybrid
Location: Boston, Massachusetts
Type: Full-time, Contract
Level: senior
Posted: Sep 15, 2026

Description

Absentia Labs is hiring a Senior AI/ML Engineer to lead the design, training, evaluation, and deployment of large-scale machine learning models, including LLMs, diffusion models, and GNNs. The role owns end-to-end training pipelines, distributed training systems, model architecture and optimization decisions, evaluation, and production inference considerations, while providing technical leadership. Candidates should have at least five years of industry experience, production experience with large models, expertise in PyTorch and distributed training, and strong software engineering skills. The position offers flexible remote or hybrid work arrangements and includes equity participation.

Required Skills

Large Language Models
Diffusion Models
Graph Neural Networks
PyTorch
Distributed Training
Model Architecture
Model Serving

Additional Information

Required Previous Experiences: 5+ years of industry experience in machine learning or applied AI roles
Experience training large-scale models in production settings
Hands-on expertise with LLMs, diffusion models, and/or GNNs
Strong proficiency in PyTorch or an equivalent deep learning framework
Deep understanding of distributed training and performance optimization
Experience with large datasets and high-throughput data pipelines
Strong software engineering fundamentals, including clean code, testing, reproducibility, and debugging at scale
Preferred Qualifications: Experience with reinforcement learning, fine-tuning, or preference-based optimization
Familiarity with model compression, distillation, or inference optimization
Experience deploying models in production inference systems
Exposure to multimodal learning or foundation models
Prior work in startups or fast-moving R&D environments
Contributions to open-source ML frameworks or research codebases
Translation Company Name: Absentia Labs

About Absentia Labs

Absentia Labs

Computing Biology

Absentia is building AI foundation models that predict how medicines behave inside the human body, helping transform biology from an experimental science into a predictive one.

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