Senior ML Engineer - Production AI (Remote US)

Legion; United States; Remote; USD 230,000 - 270,000; Full time

Job summary

Legion in the United States is seeking a Senior Software Engineer, Machine Learning, to design, build, and evolve core AI capabilities powering our enterprise AI platform. You will integrate modern foundation models into production systems, develop reusable AI components, and continuously improve their quality, reliability, and performance.

Collaborating with cross‑functional teams, you will translate advances in AI into secure, scalable capabilities for product teams, while maintaining high

Qualifications

• Bachelor's or Master's degree in Computer Science, Machine Learning, or a related technical field, or equivalent practical experience.

Responsibilities

• Design, build, and maintain the core AI capabilities that power intelligent experiences across the platform.
• Develop reusable capabilities for model integration, reasoning, multimodal understanding, structured generation, evaluation, and other foundational AI functionality.
• Optimize the AI systems that power these capabilities through experimentation, quantitative evaluation, context engineering, and iterative refinement.
• Apply your production software engineering experience to build backend services, APIs, and distributed AI systems.
• Partner closely with cross-functional partners to deploy scalable AI services that enable product teams to rapidly build AI-powered experiences.
• Rapidly prototype emerging AI techniques and translate successful experiments into production-ready platform capabilities.
• Support production systems by debugging failures and continuously improving latency, reliability, observability, and operational performance.
• Stay current with advances in AI engineering, foundation models, and applied machine learning, applying them where they create meaningful customer value.
• Optimize AI systems for performance, latency, reliability, scalability, and cost.
• Contribute to a collaborative engineering culture focused on ownership and continuous learning.

Skills

Rust

Python

Distributed systems

APIs

LLMs integration

Performance optimization

Communication

Ownership

Education

Bachelor's or Master’s degree in Computer Science or related field

Tools

Kubernetes

Git

Job description

Legion in the United States is seeking a Senior Software Engineer, Machine Learning, to design, build, and evolve core AI capabilities powering our enterprise AI platform. You will integrate modern foundation models into production systems, develop reusable AI components, and continuously improve their quality, reliability, and performance.

Collaborating with cross‑functional teams, you will translate advances in AI into secure, scalable capabilities for product teams, while maintaining high