OverviewSenior Full Stack Software Engineer (AI) Location:Hybrid - Toronto, ON On behalf of our client, Affinity is seeking a technical SME for AI product engineering who defines technical standards, patterns, and guardrails for AI product development. You will establish rapid POC cycles to validate feasibility and inform production architecture, and provides technical oversight of vendor-led production implementations. What You'll DoBuild repeatable POC process enabling team to validate technical feasibility Lead internal prototyping to prove concepts before production investment Create starter templates, reusable components, and AI patterns library (Skills, Agents, MCPs) Document learnings to inform production architecture and vendor direction Translate POC learnings into production architecture and technical specifications Create detailed blueprints vendors execute from Define technical requirements: performance, security, scalability, monitoring Technical Oversight & Risk Management (25%)Review vendor code and architecture to manage production implementation risks Ensure vendor solutions align with POC findings and architectural vision Conduct architecture reviews and identify risks early Internalize knowledge to reduce vendor dependency Define AI development standards, patterns, and guardrails Enable team to become AI-native (Claude Code, AI-assisted development) Evaluate and adopt emerging AI tools and frameworks Collaborate with UX on design system implementation for vendor use What It TakesProven ability to architect and ship production RAG systems—hands-on experience with chunking strategies, embeddings, vector databases, and reranking Familiarity with agentic patterns including MCP, function calling, tool use, and orchestration frameworks (e.G., LangGraph, Semantic Kernel) Understanding of LLM limitations and strong judgment on when AI is (and isn 't) the right solution Exposure to function calling, tool use,



and agent-to-agent interaction patterns in production or experimental settings Ability to establish repeatable processes and patterns that enable team velocity—you build systems, not just features Strong technical collaboration, code review, and documentation skills to guide vendors and internal teams Practical experience with cloud platforms and DevOps practices (Azure AI stack, CI/CD, Docker, Infrastructure as Code is a plus) Experience managing or providing technical oversight of vendor implementations is a plus 5+ years of full-stack development experience, including 1+ years building production AI/ML systems with LLMs Strong backend development skills—designing and building REST APIs, handling state management, and architecting scalable services Proven front-end expertise with React, Next.Js, TypeScript, and Tailwind CSS, with practical experience building design systems and component libraries Understanding of Model Context Protocol (MCP) architecture — how MCP servers expose tools and data to AI clients, and how standardized tool integration replaces custom point-to-point connectors in enterprise environments Base salary range $140K - $170K Affinity EarnKnow someone who’s excellent for this, or any of our open roles? Earn up to $4,000/year for each successful referral through Affinity Earn. You can also earn up to $50,000 for helping us find current clients. Learn about our referral program at or browse our jobs & follow us at About AffinityAffinity Group is a technology and business consulting and services company. We believe in creating long term relationships between clients and consultants that foster a mutually beneficial partnership. Affinity is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All employment is decided on the basis of qualifications, merit and business need. For more information on Affinity, please visit

📌 Senior Full Stack Software Engineer (Ai) - $140,000 - $170,000 A Year (Toronto)
🏢 Affinity Group
📍 Toronto