Senior Software Engineer – Voyager

Relay

. Build and deploy secure, reusable LLM systems for product experiences .

Posted 9/30/2026full-timeToronto • CanadaSenior💰 CA$144,000 - CA$176,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and deploying secure LLM systems, with a strong focus on AI infrastructure management and technical leadership. Proven ability to mentor engineers, drive code quality, and influence technical direction in fast-paced environments.

Highest-signal resume keywords

Full-Stack Software EngineeringAI Infrastructure ManagementLLM ExperienceAWS Services KnowledgeMentoring Junior Engineers

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Full-Stack Software EngineeringLLM Systems DevelopmentCode Quality OptimizationPerformance OptimizationPrototypingProduction-Ready Systems DevelopmentTechnical EvaluationProblem SolvingContinuous DeploymentJavaScript

Soft Skills

Collaborative ApproachCuriosityAdaptabilityFeedback ReceptionProactive Problem Solving

Tools & Technologies

AWS ServicesContinuous Deployment PipelinesAgentic AIRetrieval SystemsOpen Models

Certifications & Qualifications

Successful Background CheckEmployment Verification through Certn

Industry Keywords

Startup ExperienceHigh-Growth Technology Company ExperienceAI WorkflowsTechnical DirectionEmerging Technologies

Tech Stack

Tools & technologies

AWSJavaScript

About the role

Key responsibilities & impact

Build and deploy secure, reusable LLM systems for product experiences
Own AI infrastructure across its lifecycle, from design through deployment and monitoring
Lead exploratory initiatives and proof-of-concepts for emerging technologies
Produce recommendations on whether and how Relay should adopt evaluated technologies
Provide teams with tooling, patterns, and guidance to ship AI workflows quickly and safely
Partner with product teams as an AI technical expert
Help teams make sound technical decisions rather than building everything for them
Identify technical, process, and product improvement opportunities
Influence technical direction and long-term strategy
Participate in live coding, system design, and interview processes as described

Requirements

What you’ll need

3+ years of full-stack software engineering experience
Experience leading development of significant components or features with minimal oversight
Ability to move between exploratory prototypes and production-ready systems
Strong judgment in evaluating emerging technology
Experience mentoring junior engineers
Ability to drive code quality, performance optimization, and development process improvements
Curiosity about new frameworks, best practices, and emerging technologies
Comfort working in fast-paced, dynamic environments and navigating ambiguity and change
Collaborative approach and willingness to give and receive feedback
End-to-end ownership and proactive problem solving
Legally authorized to work in Canada
Must be able to join the Toronto office three days a week (Tues/Weds/Thurs)
Agentic AI experience is a plus
Startup or high-growth technology company experience is a bonus
Hands-on LLM experience, including self-hosting or serving open models, retrieval systems, evaluation, or agentic workflows, is a bonus
Platform or shared services experience is a bonus
JavaScript experience is a bonus
Working knowledge of AWS services and continuous deployment pipelines is a bonus
Successful background check and employment verification through Certn required

Benefits

Comp & perks

Compensation changes are not limited to a once-a-year review cycle
Background check and employment verification through Certn as a condition of employment
Accommodations available at any stage of the hiring process