data annotator jobs in Toronto

1,137 data annotator job listings in Canada. Find daily updated positions from leading job boards.


  • Toronto, Ontario, Canada Alignerr Corp. Full-time

    Precision Medicine Data Lead (AI Training) About The Role What if your expertise in genomics and clinical data could directly shape how AI understands and advances personalized medicine for millions of patients worldwide? We're looking for a Precision Medicine Data Lead to help guide the integration, governance, and transformation of complex healthcare...


  • Toronto, ON, Canada Cohere Full-time $90,000 - $120,000 Contract

    Who are we? Cohere is the leading security-first enterprise AI company, building cutting-edge foundation AI models and end-to-end products designed to solve real-world business problems. We’re training and deploying frontier models for enterprises who are building AI systems. We believe that our work is instrumental to the widespread adoption of AI and we...


  • Toronto, Ontario, Canada Alignerr Remote Full-time US$40 - US$80 Permanent

    Hospital Health Data Governance Lead (AI Training) About The Role What if your expertise in healthcare data governance could directly shape how AI understands and reasons about hospital systems, clinical records, and health compliance? We're looking for experienced Hospital Health Data Governance Leads to bring real-world knowledge to cutting-edge AI...

  • Quality Analyst

    10 hours ago


    Toronto, Ontario, Canada Mercor Full-time

    About the Role We’re hiring Quality Analysts on a contract basis to help ensure the accuracy, consistency, and reliability of data. You’ll play a key role in reviewing outputs, flagging issues, and helping us maintain a high bar for quality across projects. What You’ll Do Review work product against defined quality standards, rubrics, and...

  • Sr Data Scientist II

    5 hours ago


    Toronto, Ontario, Canada RELX Full-time

    Are you excited about shaping the next generation of AI-powered legal technology through generative AI, retrieval systems, and production-grade machine learning? Do you enjoy building reliable, scalable applications that transform complex AI capabilities into impactful customer solutions?About Our TeamLexisNexis Legal & Professional, which serves customers...


  • Toronto, ON, Canada Crossing Hurdles Full-time

    Shape the future of robotics by utilizing your photography skills in video annotation. This remote position focuses on detailed review and tagging of footage involving robotic arms. In this role, you will review video footage, apply detailed annotation, and evaluate the visual quality of robotic tasks. Your professional photography background will help in...


  • Toronto, ON, Canada ACV Auctions Full-time €120,000 - €150,000 Contract

    What you will do: ACV's Machine Learning organization is looking for a talented Machine Learning Engineer III to join our ML inspection team. In this role, you’ll drive end-to-end computer vision solutions processing hundreds of thousands of vehicle inspections annually into reliable, actionable insights, directly reducing inspection turnaround time,...


  • Toronto, ON, Canada ACV Auctions Full-time €120,000 - €180,000 Contract

    What you will do: ACV's Machine Learning organization is looking for a talented Machine Learning Engineer IV to join our ML inspection team. In this role, you'll drive end-to-end computer vision solutions processing hundreds of thousands of vehicle inspections annually into reliable, actionable insights, directly reducing inspection turnaround time,...


  • Toronto, Ontario, Canada Alignerr Remote Full-time US$40 - US$80 Permanent

    Precision Medicine Data Lead (AI Training) About The Role What if your expertise in genomics and clinical data could directly shape how AI understands and advances personalized medicine for millions of patients worldwide? We're looking for a Precision Medicine Data Lead to help guide the integration, governance, and transformation of complex healthcare...


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

    Join to apply for the English Language Data Annotator (British Columbia, remote) role at TransPerfect Work Location: British Columbia; remote Work Schedule: Full-time (40 hours/week), Monday – Friday; business hours Engagement Model: Employment; fixed term/temporary Start Date: Immediate Project duration: Until September 2025 DataForce by...


  • Toronto, Canada xAI Remote Full-time US$104,000 - US$156,000 Contract

    SpaceX was founded under the belief that a future where humanity is out exploring the stars is fundamentally more exciting than one where we are not. Today, SpaceX is actively developing the technologies to make this possible, with the ultimate goal of making life multiplanetary and expanding consciousness to the stars.SpaceXSI is building Super Intelligence...


  • Toronto, ON, Canada Mercor Full-time $50,000 - $70,000 Contract

    Mercor seeks experienced French Linguistic Experts to join a cutting-edge AI research project in partnership with a leading research lab. You will evaluate LLM French outputs, edit and annotate content, and provide linguistic insights to improve model performance.Candidates should be near-native in French, skilled in translation/editing and NLP data work,...


  • Toronto, Ontario, Canada Alignerr Remote Full-time US$40 - US$80 Permanent

    Biotech Health Data Governance Lead (AI Training) About The Role What if your expertise in biotech data governance could directly shape how AI understands and works with clinical and research data — accelerating scientific discovery and improving how life sciences organizations operate at scale? We're looking for a Biotech Health Data Governance Lead to...


  • Toronto, Ontario, Canada Waabi Full-time

    Waabi, founded by AI pioneer and visionary Raquel Urtasun, is an AI company building the next generation of self‑driving technology. With a world class team and an innovative approach that unleashes the power of AI to “drive” safely in the real world, Waabi is bringing the promise of self‑driving closer to commercialization than ever before. Waabi is...

  • German Data Labeler

    3 days ago


    Toronto, ON, Canada Cohere Full-time €34,095 - €48,560 Contract

    A leading AI firm in Toronto is seeking a part-time Data Annotation Specialist to enhance their Large Language Models. This role requires native proficiency in German and excellent English skills. Responsibilities include labeling, auditing, and correcting data, which significantly impacts model performance. The position offers a competitive rate of 30...


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

    A leading localization company is looking for skilled AI Data Annotators to perform essential rating and annotation tasks. This part-time remote role requires proficiency in French-Canadian and advanced English skills. Candidates should showcase attention to detail, meet deadlines, and commit to a minimum of 15-20 hours per week. Joining this team means...

  • Quality Analyst

    4 days ago


    Toronto, Ontario, Canada Obsidian Full-time

    About the Role We’re hiring Quality Analysts on a contract basis to help ensure the accuracy, consistency, and reliability of data. You’ll play a key role in reviewing outputs, flagging issues, and helping us maintain a high bar for quality across projects. What You’ll Do Review work product against defined quality standards, rubrics, and...


  • Toronto, ON, Canada Welo Global Full-time

    Welo Data is seeking a meticulous QC Specialist to review AI data annotation tasks. You will validate Trainer submissions against images and golden answers, flag issues, and provide constructive feedback to uphold data quality. This freelance, remote role offers 10 hours weekly and payment at $28.8 per hour.Ideal candidates are detail-focused with strong...


  • Toronto, ON, Canada Alignerr Corp. Remote Full-time $55,000 - $96,000 Contract

    Environmental Engineering – AI Data TrainerAbout The RoleWe're partnering with the world's leading AI research labs to build smarter, more technically rigorous AI models — and we need environmental engineers who know their stuff. Your expertise in water treatment, air quality, remediation, and environmental compliance will directly shape how the next...


  • Toronto, ON, Canada Cohere Full-time $10,000 - $12,000 Contract

    Be a key player as a Data Annotation Specialist in engineering, focusing on task breakdowns that train machine learning models. This remote, part-time position allows for flexibility within Canada. Available exclusively to independent contractors in Canada, this role requires a minimum of 16 hours work per week at 30 CAD per hour for a 12-month contract....