Research Engineer - Post-training (Co-op / Intern) (Mississauga)

About Themis Intelligence Themis Intelligence builds the Utility Knowledge Base (UKB) and Human-Guided Intelligence (HGI) platforms, redefining how utilities operate. Our systems transform complex operational data into clear, high-confidence decisions. We design software that empowers grid professionals to think faster, act decisively, and operate with precision in critical environments. Every product we ship is built for real-world performance: reliable, observable, and secure from day one. We are an AI-first organization, continuously applying modern tools and workflows to improve how we plan, execute, and deliver outcomes. About the Role Were looking for a co-op student for a 12-month duration whos curious about how LLM agents behave in real-world applicationsespecially when it comes to hallucination, grounding, and evaluation. Youll be working on the post-training lifecycle of Themis Agents (e.g., knowledge base assistants, alarm summarizers, and SCADA-aware chatbots), ensuring that models are not only powerful but also accurate and trustworthy. Youll contribute to designing and running evaluation frameworks, comparing retrieval strategies, testing prompt chains, and analyzing model behavior across a range of tasks. This is a hands-on, research-oriented role ideal for someone with AI-related coursework and a passion for building better, safer AI systems. In this role, you will Evaluation & Grounding Evaluate Themis Agents for accuracy, factual consistency, hallucination, and tool correctness. Analyze grounding failureswhen models go off-script from retrieved knowledge or internal documents. Score and compare outputs across tasks like Q&A;, summarization, and event reasoning. Prompt & Retrieval Testing Experiment with prompt templates, few-shot examples, and retrieval settings. Compare vector store search performance using embedding models, chunking strategies, and context window variations. Run A/B tests across model versions and prompt chains. Tooling & Automation Build or extend evaluation pipelines in Python and frameworks like Lang Chain, OpenAI API, or Transformers. Visualize and organize test results using tools like Streamlit, pandas, or Dash. Help define hallucination types and build reproducible test suites for failure tracking. You might thrive in this role if you Are pursuing a Bachelors degree in Computer Science, Engineering, Math, Physics, or a related field. Have completed coursework in machine learning, natural language processing, or AI systems . Enjoy debugging model outputs and understanding why a chatbot gave a weird answer . Have worked on side projects involving chatbots, retrieval-based systems, or LLMs . Can write clean Python code and think critically about accuracy, context, and grounding. Bonus Points For Experience with Lang Chain, Llama Index, or RAG architectures. Familiarity with evaluation frameworks like lm-eval-harness, RAGAS, or custom harnesses. Knowledge of vector databases (e.g., Qdrant) and prompt engineering techniques. Interest in safety, reliability, or interpretability of AI agents. This is a 12-month duration COOP/ Intern hybrid role (four days in-office) reporting directly to the Technology Director. The salary range for this role is $20$30 per hours. Interested candidates are invited to submit their cover letter and resume. Themis Intelligence values a diverse workplace and strongly encourages women, people of all races, color, creed, ancestry, ethnic origin, sexual orientation, gender identity or expression, age, religion, nat ional origin, citizenship status, disability, marital status, family status, and those with disabilities to apply. We use AI tools to help streamline parts of our recruitment process, but every application is reviewed by a member of our team. Themis is an equal chance employer. We are committed to providing accommodations for persons with disabilities. If you require accommodation, we will work with you to meet your needs. While we appreciate the interest of all applicants, only those selected for an interview will be contacted. Apply on Kit Job: kitjob.ca/job/2od4gb