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 robust 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.

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📌 Senior Agent Runtime Software Engineer (Quebec City)
🏢 Motionapp
📍 Quebec City