Jobs for data annotator at Toronto

1,000 data annotator job listings in Canada. Find daily updated positions from leading job boards.


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Mecka AI Full-time

    About Mecka AI Mecka AI is building the data infrastructure layer for robotics and embodied AI. We design and operate global systems for data capture, data labeling, and hardware-enabled workflows used by leading AI labs and robotics companies to train and validate humanoid and embodied AI systems. We work closely with frontier robotics teams to bridge...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Kindredventures Full-time

    About Mecka AI Mecka AI is building the data infrastructure layer for robotics and embodied AI. We design and operate global systems for data capture, data labeling, and hardware-enabled workflows used by leading AI labs and robotics companies to train and validate humanoid and embodied AI systems. We work closely with frontier robotics teams to bridge...

  • SAP ABAP Developer

    5 days ago


    Toronto, ON, Toronto Census Division, ON; Ontario, Canada Michael Page International (Canada) Full-time

    Work with cutting-edge SAP tech: S/4HANA, Fiori, RAP, CAP, CDS & BTP. Build modern cloud-native SAP solutions with strong ownership and impact. About Our Client Canadian insurance provider Job Description Position Details What You Will Do Perform hands‑on SAP ABAP development for S/4HANA, including enhancements, exits, and technical build...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Rubicon Path Full-time

    About the job RQ09609 - Systems Analyst - Senior Work with Business Analysts / UX & UI Designer / Product Manager / Cloud Architect, base on storyboard, user stories, UI/UX artefacts, solution architecture, security requirements, data models, develop application design and technical specification document, deliver quality software products (including...

  • Music Producer

    6 days ago


    Toronto, ON, Toronto Census Division, ON; Ontario, Canada Obsidian Full-time

    Mercor is hiring experienced Musicians to evaluate generative musical AI models in partnership with a leading AI lab. You will assess model outputs across in different categories of music in your bilingual language. Key Responsibilities Evaluate AI model output lyrics, voice generation, and other standards Score quality of musical training data ...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Rex.zone Full-time

    About The Role AI Trainer jobs in Canada focus on improving large language models through RLHF-style evaluations, prompt evaluation, data labeling, and QA evaluation across real AI/ML training pipelines. You will follow detailed annotation guidelines, verify training data quality, and provide structured feedback that improves helpfulness, correctness, and...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada YO IT Consulting Full-time

    Job Type: Contractor Location: Remote Role Description If you’re a venture capital professional who thrives on market insight, analytical rigor, investment judgment, and clear communication, this is a unique opportunity to contribute directly to how advanced AI systems reason about private markets, startups, and investment decision-making. We’re...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Mercor Full-time

    Mercor is seeking a remote AI red team specialist to probe conversational models and identify vulnerabilities. You will annotate failures, surface risks, and generate reproducible data for safety improvements. The role emphasizes structured testing, clear communication of risks to diverse stakeholders, and the ability to adapt across multiple projects....


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Rex.zone Full-time

    A tech company specializing in AI is seeking an AI Trainer based in Canada. The role involves improving large language models through RLHF-style evaluations, prompt evaluation, and data labeling. Candidates should have experience with structured evaluation, strong writing skills, and familiarity with AI evaluation workflows. This position offers an hourly...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Palona Full-time

    Palona is building AI for the physical world, starting with restaurants. Understanding a busy restaurant means making sense of people, objects, activities, and events as they change over time, despite occlusion, changing lighting, varied camera views, and incomplete information. We are looking for an AI Research Engineer with a strong research background...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Palona AI Full-time

    Palona is building AI for the physical world, starting with restaurants. Understanding a busy restaurant means making sense of people, objects, activities, and events as they change over time, despite occlusion, changing lighting, varied camera views, and incomplete information. We are looking for an AI Research Engineer with a strong research background...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Mercor Full-time

    Mercor is building a red team for AI safety. This remote role focuses on adversarial testing of conversational AI models, with tasks including jailbreaks, prompt injections, and bias probing. You will generate high‑quality human data, annotate vulnerabilities, and document reproducible attack cases for customers. Ideal candidates are experienced in AI...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Altis Labs, Inc. Full-time

    What We Do We build AI models to enable smaller, faster, and more successful clinical trials. About Altis Labs Altis Labs is a computational imaging company focused on improving how oncology trials measure treatment benefit. Our core technology is IPRO, an AI model that generates patient-level outcome predictions directly from routine medical imaging...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Tankww Full-time €65,000 - €115,000 Temporary

    As an Art Supervisor working across healthcare brands, you will be supporting a larger team, while having a role as a major contributor to the development of promotion across print and digital media. You'll be challenged to push boundaries to produce work that exceeds client expectations, both conceptually and in the execution of the copy. You should be...


  • Toronto, ON, Canada Obsidian Full-time $70,000 - $100,000 Contract

    Join Mercor as a German Linguistic Expert in an innovative AI research project collaborating with a leading lab. Your expertise will enhance LLM performance in German language tasks. Mercor is on the lookout for skilled German Linguistic Experts to contribute to a pioneering AI project. This position focuses on evaluating LLM-generated German text quality,...


  • Toronto, Ontario, Canada Turing Full-time

    About Turing:Based in San Francisco, California, Turing is the world’s leading research accelerator for frontier AI labs and a trusted partner for global enterprises deploying advanced AI systems. Turing supports customers in two ways: first, by accelerating frontier research with high-quality data, advanced training pipelines, plus top AI researchers who...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Mercor Full-time

    Join Mercor to enhance document AI by annotating Odia documents. This role prioritizes your native language skills through tasks like transcription and structural mapping. As a Document Annotation Specialist at Mercor, you'll utilize your native Odia fluency to create critical training data. The project centers on real-world Odia documents, focusing on...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada SYSTRA Full-time

    SYSTRA Canada is part of the SYSTRA group, an international consulting and engineering group, a world leader in the design of transport infrastructures. SYSTRA Canada is an engineering and consulting firm whose primary focus is to offer transportation solutions, whether for passengers or goods: feasibility studies of building a new railway line, increasing...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada SYSTRA Canada Full-time

    SYSTRA Canada is part of the SYSTRA group, an international consulting and engineering group, a world leader in the design of transport infrastructures. SYSTRA Canada is an engineering and consulting firm whose primary focus is to offer transportation solutions, whether for passengers or goods: feasibility studies of building a new railway line, increasing...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Obsidian Full-time

    Domain Expert - Pharmacy (UpToDate Lexidrug) To qualify you must use UpToDate Lexidrug (or Lexicomp) regularly - weekly or more - as a working part of your job, with 2+ years of professional pharmacy experience. Knows how to reconcile a Special Alert against monograph content when they conflict - recognizes alerts generally take precedence until...