Fastino.ai is looking for an ML Engineer to join its mission to develop specialized, efficient AI. You will own the full lifecycle of state-of-the-art small language models, from prototyping and data analysis to deployment and continuous improvement.
What You'll Do
- Design, build, and deploy the critical small language models foundational to Fastino’s product.
- Own the full lifecycle of state-of-the-art models, from prototyping to deployment, monitoring, and continuous improvement.
- Drive the data strategy to improve model performance by analyzing distribution gaps, contributing to synthetic data pipelines, and creating automated annotation systems.
- Experiment with novel language model architectures, helping drive and execute Fastino's research roadmap.
- Implement reinforcement learning techniques including Direct Preference Optimization and Generalized Reward Preference Optimization to align model outputs with human preferences.
- Build robust and real-world motivated evaluations.
- Partner with the Fastino engineering team to ship model updates directly to customers.
- Establish best practices for code health and documentation to facilitate collaboration and reliable development.
What We're Looking For
- Advanced degree (Bachelors or Masters) in Computer Science, Artificial Intelligence, Machine Learning, or a related technical discipline with concentrated study in deep learning or computer vision methodologies.
- Demonstrated ability to do independent research in academic or industry settings.
- Substantial industry experience in large-scale deep learning model training, with demonstrated expertise in at least one of Large Language Models, Vision-Language Models, Diffusion Models, or comparable generative AI architectures.
- Comprehensive technical proficiency and practical experience with leading deep learning frameworks, including advanced competency in one of PyTorch, JAX, TensorFlow, or equivalent platforms for model development and optimization.
Technical Stack
- PyTorch
- JAX
- TensorFlow
Team & Environment
You will be reporting directly to the company Founders.
Work Mode
This role operates on a hybrid work model.





