Jobs for data annotator at Toronto

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


  • Toronto, ON, Canada Waabi Full-time €139,000 - €277,000 Contract

    Join Waabi as a Senior Product Designer focused on data-driven workflows vital for autonomous vehicles. Enhance collaboration between automation and expert judgment to improve driving safety and efficiency. In this role at Waabi, you will lead the design of integral human-in-the-loop workflows that convert raw driving data into a reliable autonomy stack....


  • Toronto, Ontario, Canada Kindredventures Full-time

    About Mecka AIMecka 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, Ontario, Canada Mecka AI Full-time

    About Mecka AIMecka 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, Ontario, Canada RBC Full-time

    Senior Data Scientist, AI Evaluations Platform Sep 2, 2026 Job Description What is the opportunity? RBC's AI Group is building trusted AI capabilities for the enterprise, and evaluation is one of the core controls that makes that possible. As Senior Data Scientist, AI Evaluations Platform, you will be a technical leader in the data science function...


  • Toronto, Ontario, Canada Sorenson Communications Full-time

    Come be a part of our mission and make a meaningful and positive impact with the industry leading provider of language services for the Deaf and hard-of-hearing! * This is a Canada Remote Only Position * Pay Range: Actual pay may vary up or down depending on job-related factors which may include knowledge, skills, experience, and location. In addition,...


  • Toronto, Ontario, Canada MECKA Full-time

    Accelerate innovation at Mecka AI as an Engineer focused on ML infrastructure and tooling. Your work will streamline operations for our Computer Vision Machine Learning team. In this role, you will develop critical services and oversee the annotation platform crucial for our robotics and AI projects. This position requires both frontend expertise and a...


  • Toronto, Ontario, Canada Mercor Full-time

    Fluent Language Skills Required: Japanese. Native fluency in Japanese, including full command of kanji, hiragana and katakana, is required for this position. All annotation and transcription work is performed in Japanese.Why This Role Exists Document understanding breaks down fastest in the languages that parsing and vision-language models rarely see. This...


  • Toronto, Ontario, Canada Welo Global Full-time

    About the RoleWe are looking for detail-oriented Generative AI Analysts to support a variety of AI training, data annotation, evaluation, and quality review projects. Project DetailsJob Title: Translation Validation - French (Canada)Location: Remote (Canada)Employment Type: FreelancePay Rate: 20USD/per hourDepending on the project, you may work with text,...

  • Photo Editor

    2 days ago


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

    DataForce by TransPerfect is looking for freelance Photo Editors to join a creative and dynamic AI training project aimed at enhancing visual content quality and diversity. Work Location: Canada (remote/work from home) Flexible schedule (preferred weekly availability is 20 hours or more) As a Photo Editor, you will be responsible for editing and...

  • Full-Stack ML Tooling

    8 hours ago


    Toronto, Ontario, Canada Mecka AI Full-time

    Mecka AI is building the data infra layer for robotics and embodied AI, enabling data capture, labeling, and hardware-enabled workflows used by leading AI labs. You will own the internal annotation platform and develop lightweight ML services like PII blurring, balancing privacy and data preservation.You will join a hybrid engineering role bridging practical...


  • Toronto, Ontario, Canada Obsidian Full-time

    Become a key player in AI research at Mercor as a German Linguistic Expert. Focus on LLM evaluation and enhance performance in German language tasks through quality data curation.Mercor seeks experienced professionals for its German Linguistic Expert role within an innovative AI research initiative. You will evaluate the accuracy of German text generated by...


  • Toronto, Ontario, Canada MECKA Full-time

    Join Mecka AI as a Full-Stack Engineer specializing in internal tooling for Machine Learning in robotics. You'll enhance infrastructure for our Computer Vision Machine Learning team to facilitate rapid development. In this hybrid role, you will maintain the annotation platform and develop efficient ML services. You will be pivotal in enabling the CVML team...


  • Toronto, Ontario, Canada Obsidian Full-time

    Mercor is seeking experienced German Linguistic Experts to join a cutting-edge AI research project. The role focuses on evaluating LLM performance in German-language tasks and curating high-quality German linguistic data to train and improve model understanding and generation capabilities. You will edit, annotate, and provide linguistic feedback while...


  • Toronto, Ontario, Canada Obsidian Full-time

    Fluent Language Skills Required: Japanese. Native fluency in Japanese, including full command of kanji, hiragana and katakana, is required for this position. All annotation and transcription work is performed in Japanese.Why This Role Exists Document understanding breaks down fastest in the languages that parsing and vision-language models rarely see. This...


  • Toronto, Ontario, Canada Mercor Full-time

    Mercor seeks experienced English Linguistic Experts to join an AI research project and evaluate LLM performance on English-language tasks. You will curate high-quality English linguistic data to train and improve the model’s understanding and generation capabilities.Responsibilities include evaluating, editing, annotating, and providing linguistic feedback...

  • Remote Phonetician

    15 hours ago


    Toronto, Ontario, Canada Omilia Full-time

    Role PurposeEnsure the linguistic and phonetic quality of Omilia’s multilingual Text-to-Speech (TTS) systems by designing phoneme inventories, developing lexicons, and reviewing audio corpora to support enterprise-grade voice experiences.AccountabilitiesAutonomy: Independently conduct phonological and phonetic analysis, design phoneme inventories, and...


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

    Accelerate innovation at Mecka AI as an Engineer focused on ML infrastructure and tooling. Your work will streamline operations for our Computer Vision Machine Learning team. In this role, you will develop critical services and oversee the annotation platform crucial for our robotics and AI projects. This position requires both frontend expertise and a...


  • Toronto, ON, Toronto Census Division, ON; Ontario, Canada Obsidian Full-time €70 Temporary

    Are you a Level 3 / Tier 3 network support engineer interested in data science and autonomous infrastructure? Our client is building vertically integrated networking systems and using the data they generate to power the next generation of AI-driven infrastructure. They’re looking for engineers experienced in final escalations, packet analysis,...


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

    Overview DataForce by TransPerfect is looking for freelance Photo Editors to join a creative and dynamic AI training project aimed at enhancing visual content quality and diversity. Role: Freelance Photo Editor (Remote, Canada) Role Description As a Photo Editor, you will be responsible for editing and annotating a variety of images to create visually...


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

    Develop and curate training materials, case scenarios, and activities based on real-world recreational therapy practices. Train AI systems on therapeutic concepts including sports, arts, music, relaxation techniques, and social engagement. Review and annotate AI outputs to ensure clinical accuracy, empathy, and adherence to approved therapeutic...