Senior Agent Runtime Software Engineer

Build AI-powered infrastructure in Montreal with TypeScript, Node.js, and Rust for Motion’s Runneth platform. Work from the office three or four days weekly.

As a Senior Software Engineer, you will work on Agent Runtime, including the VM, applications, harness, and primitives behind Runneth. You will ship product features end to end while supporting services that enable the customer-facing experience. The work includes architecture, integrations, data at scale, performance, security, and developer experience. Motion uses React, Node.js with Express, TypeScript, GraphQL, PostgreSQL, MongoDB, and Azure.

Key Responsibilities:

• Own features from problem understanding through implementation
• Build services and primitives supporting the Runneth experience
• Improve system speed, reliability, and security
• Address integrations, scaled data, performance, and developer experience
• Review AI-generated code against engineering standards

Requirements:

• Live in Montreal and attend the office three or four days weekly
• Bring product shipping experience from a small team
• Demonstrate strong programming fundamentals and production experience
• Design and ship real systems across multiple languages
• Explain architectural decisions and translate issues into business impacts

Apply your engineering judgment, infrastructure experience, and AI-aware development approach to Motion’s Agent Runtime team in Montreal.