Senior AI/ML Engineer: Scale LLMs & Real-World Impact

United States Digital Space LLC; Boston (MA); On-site; USD 150,000 - 210,000; Full time

Job summary

United States Digital Space LLC is seeking a Senior AI/ML Engineer to scale the intelligence layer behind its AI-powered experiences, including Coach and AI Support. You will own core AI Platform components and partner with product and data science to deliver reliable, real-world AI systems from evaluation pipelines to deployment.

You will design pipelines, fine-tuning workflows, and observability for language-model based features, while mentoring engineers and ensuring robust data workflows.

Qualifications

• 3+ years of experience in applied machine learning, AI engineering, or ML-focused software engineering roles, including significant work in production environments.
• Hands-on experience building with modern language models (open-weight or API-based), including prompt design, fine-tuning, and rigorous evaluation.
• Solid working understanding of ML fundamentals (dataset construction, feature engineering, training workflows, evaluation metrics, experiment design).
• Familiarity with modern LLM training and alignment techniques such as supervised fine-tuning (SFT), direct preference optimization (DPO), and reinforcement learning (RL).
• Proven track record building, shipping, and operating ML-powered systems end to end, from data pipelines to production deployments with inference optimization and observability.
• Strong proficiency in data manipulation and analysis with multi-source data.

Responsibilities

• Design, build, and operate production AI systems and scaffolding around language models for our products.
• Lead end-to-end AI system initiatives from problem definition to deployment in collaboration with data science and product.
• Build and maintain data pipelines turning multi-source data into clean training/evaluation datasets.
• Operationalize fine-tuning and eval workflows for large language models behind member features.
• Develop tooling to accelerate experimentation, evaluation, and deployment with robust observability.
• Build feedback loops connecting real interactions to model updates for continuous improvement.
• Mentor engineers and data scientists, sharing best practices in applied AI/ML.

Skills

Applied ML

Production ML systems

LLM engineering

Data pipelines

Job description

United States Digital Space LLC is seeking a Senior AI/ML Engineer to scale the intelligence layer behind its AI-powered experiences, including Coach and AI Support. You will own core AI Platform components and partner with product and data science to deliver reliable, real-world AI systems from evaluation pipelines to deployment.

You will design pipelines, fine-tuning workflows, and observability for language-model based features, while mentoring engineers and ensuring robust data workflows.