Jobs for data annotations at Toronto

885 data annotations job listings in Canada. Find daily updated positions from leading job boards.

  • ML Engineer Premium

    8 hours ago


    Toronto, Ontario, Canada CreatorIQ Full-time $150,000 - $188,000 Contract

    CreatorIQ is the operating system for creator-led growth trusted by more than 1,300 global brands and agencies.We’re on a mission to make businesses more human, and humans more impactful. We operate by our values — be intentional, pursue excellence every day, embrace the journey together, and be a good human — every day. CreatorIQ has earned the title...

  • Health Policy Premium

    1 day ago


    Toronto, Ontario, Canada Alignerr Remote Full-time US$35 - US$55 Permanent

    Health Policy & Management - AI Data Trainer Location: Remote About The Job At Alignerr, we partner with the world’s leading AI research teams and labs to build and train cutting-edge AI models. We are seeking Masters in Public Health (MPH) graduates to help train AI models to provide accurate, evidence-based health information and policy analysis. You...


  • Toronto, Ontario, Canada Thomson Reuters Full-time

    About The Role This role sits within the applied science function. You will own the design, development, and production deployment of document understanding systems that directly power Westlaw, PracticalLaw, and CoCounsel. The problems are real, the scale is large, and the expectation is shipped, reliable, measurable impact. About The Role This role sits...


  • 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, Ontario, Canada Transperfect Salary Full-time

    Job descriptionWork Location: Canada (remote/work from home)Workload: Flexible schedule (preferred weekly availability is 20 hours or more)Engagement Model: Freelance/Independent contractorExpected start date: Mid-October 2025. DataForce by TransPerfect is looking for freelance Photo Editors to join a creative and dynamic AI training project aimed at...

  • AI Vision Engineer

    2 days ago


    Toronto, ON, Canada Nexxa.AI Full-time €120,000 - €180,000 Contract

    Nexxa is building the best AI systems for heavy industries — enabling machines, systems and operations to think, decide and act autonomously across manufacturing, large-scale infrastructure, logistics and legacy environments. Our mission is to translate deep technical breakthroughs into operational reality, solving some of the hardest systems-level...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada St. Michael's Hospital Full-time

    Research Coordinator I RADIS Research and Simulation Lab(Job Id 16151) Job title: Research Coordinator I RADIS Research and Simulation Lab Job ID: 16151 Site: CA:ON:Toronto:St. Michael's Hospital Category: Research Work type: Full-Time Temporary Date posted: July 22, 2026 Salary range: 39.11-48.89 Shift/ hours of work: Description Research Coordinator...

  • Rq11420 Premium

    8 hours ago


    Toronto, Ontario, Canada Flexstaf IT Full-time

    Must have: must have experience Azure data tools - azure, databricks, MLflow, python Exposure to LLM frameworks (DSPy, LangChain, Hugging Face, or equivalent). Familiarity with Python and libraries like pandas, scikit-learn, or PyTorch. Experience and Skill Set Requirements Role Overview: The Government of Ontario is embarking on a large Data & AI...


  • Toronto, Ontario, Canada Altis Labs, Inc. Full-time

    Elevate clinical trials by joining Altis Labs as a Senior Full-Stack Software Engineer. You'll spearhead innovations in our IPRO software, building scalable AI-driven solutions for healthcare. In this entrepreneurial role, you'll design key features for our clinical annotation platform, Nota, and manage ML inference infrastructure. Engage in a dynamic...

  • Governance, Risk Premium

    2 days ago


    Toronto, Ontario, Canada Alignerr Remote Full-time US$30 - US$55 Permanent

    Governance, Risk & Compliance (GRC) Analyst (AI Training) About The Role We're looking for experienced GRC professionals to help train and validate cutting-edge AI systems. At Alignerr, we partner with the world's leading AI research labs — and we need practitioners who understand how security policies, compliance programs, audits, and risk management...

  • Health Policy Premium

    1 day ago


    Toronto, Ontario, Canada Alignerr Remote Full-time US$35 - US$55 Permanent

    Health Policy & Management – AI Content Specialist About The Role Your public health expertise is more valuable than ever — and not just in traditional settings. At Alignerr, we partner with the world's leading AI research labs to build smarter, safer AI systems. We're looking for Masters in Public Health (MPH) professionals to help train and evaluate...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Thomson Reuters Full-time €140,000 - €175,000 Temporary

    About The Role This role sits within the applied science function. You will own the design, development, and production deployment of document understanding systems that directly power Westlaw, PracticalLaw, and CoCounsel. The problems are real, the scale is large, and the expectation is shipped, reliable, measurable impact. About The Role This role sits...


  • Toronto, Ontario, Canada Alignerr Remote Full-time US$35 - US$70 Permanent

    Biochemistry Subject Matter Expert (AI Training) About The Role We're looking for PhD-level Biochemists to help evaluate and improve the world's most advanced AI systems. Your scientific expertise will directly shape how AI reasons through complex topics like protein folding, metabolic flux, enzyme kinetics, and molecular genetics — making a real impact...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Mindrift Full-time €45 Temporary

    Freelance Software Developer (Java) - Quality Assurance (AI Trainer) Get AI-powered advice on this job and more exclusive features. Please submit your resume in English and indicate your level of English proficiency. We believe in using the power of collective intelligence to ethically shape the future of AI. The Mindrift platform connects specialists...


  • Toronto, Ontario, Canada Source Code Full-time

    RQ09756/RQ09775 - Sr. Training Specialist About the job RQ09756/RQ09775 - Sr. Training Specialist RQ09756/RQ09775 - Sr. Training SpecialistOn-site - Manager's discretionContract 6-7+ monthsSecurity Level: CRJMC (must get clearance before start date)Support sandbox data preparation and environment setup for training and testing purposes within Microsoft...

  • Music Producer

    3 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 ...

  • Telugu Music Expert

    3 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 ...

  • Medical Editor Premium

    8 hours ago


    Toronto, Ontario, Canada Klick Health Full-time $70,000 - $80,000 Contract

    Company DescriptionThe Klick Group—comprising Klick Health (including Oxford PharmaGenesis, Klick Katalyst, and btwelve), Klick Media, Klick Applied Sciences (including Klick Labs), and Klick Consulting—is an ecosystem dedicated help life sciences brands achieve their full potential through best-in-class marketing and advertising, media, medical affairs...

  • Rq09756/Rq09775 Premium

    8 hours ago


    Toronto, Ontario, Canada Source Code Full-time

    RQ09756/RQ09775 - Sr. Training Specialist Toronto (College/Bay) On-site - Manager's discretion 2 Roles/2 vacancies Contract 6-7+ months Security Level: CRJMC (must get clearance before start date)Support sandbox data preparation and environment setup for training and testing purposes within Microsoft Dynamics 365 CE and F&O.Create role-based test case...

  • Physics Subject Matter Expert Premium

    1 day ago


    Toronto, Ontario, Canada Alignerr Remote Full-time US$35 - US$55 Permanent

    Physics Subject Matter Expert (AI Training) About The Role We're partnering with the world's leading AI research labs to make AI smarter — and we need physicists to help get it there. As a Physics Subject Matter Expert, you'll use your advanced knowledge to challenge, evaluate, and improve how AI systems reason through complex physics problems. Your...