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AI Engineer, AI Platform

Affinity
Toronto, Ontario
Full Time
Posted February 19, 2026
CA$116k - CA$160k
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Job Description

An AI Engineer at Affinity will design and develop large language model-powered AI systems to extract insights from vast datasets, supporting the company's relationship intelligence platform. The role involves building retrieval-augmented generation pipelines, multi-agent systems, and collaborating cross-functionally to create scalable, high-quality AI solutions.

Key Responsibilities

  • Design, build, and deploy RAG pipelines combining vector search, hybrid retrieval, reranking, and contextual compression techniques
  • Develop LLM-powered agent systems and orchestrate multi-agent LLM frameworks
  • Work on information extraction, storage, and retrieval problems for structured and unstructured data
  • Collaborate with cross-functional teams to build scalable, robust data processing and ML systems

Requirements

  • Minimum of 2 years of experience in software engineering and/or Machine Learning experience in applying machine learning in production.
  • Hands-on experience with LLM applications in production, including prompt engineering and utilizing frameworks for online and offline evaluation.
  • Experience with LLM assisted search, such as query understanding and augmentation, text2sql, and entity extraction.
  • Experience with vector or graph databases.
  • Experience with document chunking, embedding models, and context window optimization.
  • Familiarity with metadata-based retrieval and re-ranking strategies.
  • Hands-on experience with model evaluation metrics such as perplexity, hallucination rate, and factual consistency.
  • Familiarity with data security, versioning, and MLOps principles.

Benefits & Perks

Health benefits covering both employee and dependents, including flexible personal sick days
Retirement plan (RRSP)
Annual education budget and comprehensive learning and development program
Wellness support including monthly reimbursements for home internet, meals, and wellness memberships
Virtual team-building activities and socials

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