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Data Annotation Jobs in Ontario (NOW HIRING)

Prior data annotation, labeling, or AI evaluation experience Application Process (Takes 20-30 mins to complete) * Upload resume * AI interview based on your resume * Submit form Resources & Support

Prior data annotation, labeling, or AI evaluation experience is a plus Application Process (Takes 20-30 mins to complete) * Upload resume * AI interview based on your resume * Submit form Resources ...

You will create, configure, and monitor data annotation jobs to keep evaluation and calibration datasets fed on schedule. * You will develop and maintain QA tooling, notebooks, and pipeline ...

Senior / Staff Software Engineer, Web Tools

Toronto, ON · On-site +1

CA$141K - CA$249K/yr

  • Medical

  • Dental

  • Vision

  • PTO

... tools, data annotation tools, dataset curation tools, result comparison tools, and more. Qualifications: - Bachelor's degree in Computer Science, Computer Engineering or related engineering ...

You will create, configure, and monitor data annotation jobs to keep evaluation and calibration datasets fed on schedule. * You will develop and maintain QA tooling, notebooks, and pipeline ...

Machine Learning Engineer

Toronto, ON · Remote

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Coordinate data collection and annotation efforts. * Work with real-time data and content coming from various data sources. * Manage machine learning data pipelines. * Design tests for machine ...

Sr. Computer Vision Engineer

Toronto, ON · On-site

CA$168K - CA$220K/yr

Oversee dataset creation, curation, and annotation to ensure high-quality training and validation data. * Monitor system performance in production, ensuring scalability and robustness. What we are ...

AI Modeling Engineer

Toronto, ON · On-site

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Create and maintain representative datasets from simulations, human annotation, production feedback, and difficult edge cases while protecting sensitive data. * Evaluate frontier and open-source ...

New

AI Modeling Engineer

Toronto, ON

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Create and maintain representative datasets from simulations, human annotation, production feedback, and difficult edge cases while protecting sensitive data. * Evaluate frontier and open-source ...

Engineer, AI & Software Testing

Toronto, ON · Hybrid

CA$95K - CA$145K/yr

Proficient in handling training and validation data, segmentation and annotation process * Proficient in programming python * Proficient in machine learning and AI frameworks such as Tensorflow ...

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Data Annotation information

What does a data annotation do?

A typical workday as a Data Annotator involves reviewing datasets—such as images, audio, text, or video—and accurately labeling or categorizing information according to specific project guidelines. Most Data Annotators work independently, but they often collaborate with project managers or data scientists to clarify requirements and resolve ambiguities. Tasks may be repetitive, but adhering to precise standards is vital for maintaining data quality. Work environments can range from technology companies to remote or freelance settings, and advancement opportunities exist as team leads or quality assurance specialists for those who excel in consistency and reliability.

How much money can I make doing data annotation?

Data annotation jobs typically pay between $10 and $20 per hour, depending on the complexity of the task and the employer. Experienced annotators or those working on specialized projects may earn higher rates, especially if they have skills in specific tools or domains. Earnings can vary based on whether the work is freelance, part-time, or full-time, and some platforms offer bonuses for accuracy or speed.

What is a data annotation?

A Data Annotation job involves labeling and categorizing data, such as text, images, audio, or video, to help train machine learning models. Annotators apply tags, bounding boxes, or classifications to data based on specific guidelines. This process improves the accuracy of AI systems in recognizing patterns and making predictions. Many data annotation jobs require attention to detail and familiarity with specific domains. It is commonly used in applications like autonomous driving, natural language processing, and computer vision.

What are the key skills and qualifications needed to thrive in data annotation?

To thrive in Data Annotation, you need strong attention to detail, accuracy, and basic data handling skills, often supported by a high school diploma or equivalent. Familiarity with annotation platforms, data labeling software, or content management systems is frequently required, though specific certifications are rare. Excellent communication, time management, and the ability to focus on repetitive tasks distinguish top performers in this role. These skills are crucial because accurate and consistent data annotation directly impacts the quality of machine learning models and AI applications.

What are the most commonly searched types of Data Annotation jobs in Ontario?

The most popular types of Data Annotation jobs in Ontario are:

What are popular job titles related to Data Annotation jobs in Ontario?

For Data Annotation jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Data Annotation jobs in Ontario look for?

The top searched job categories for Data Annotation jobs in Ontario are:

What cities in Ontario are hiring for Data Annotation jobs?

Cities in Ontario with the most Data Annotation job openings:

Infographic showing various Data Annotation job openings in Ontario as of August 2026, with employment types broken down into 58% Full Time, 16% Part Time, and 26% Contract. Highlights an 73% In-person, 5% Hybrid, and 22% Remote job distribution.

Pharmacy Expert - Lexidrug Specialist

Mercor

Toronto, ON • Remote

CA$75 - CA$120/hr

Full-time

Posted 4 days ago


Job description

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark, General Catalyst, Peter Thiel, Adam D'Angelo, Larry Summers, and Jack Dorsey.

Position: Pharmacist
Type: Contract
Compensation: $75–$120/hour
Location: Remote

Role Responsibilities

  • Confirm interaction, dosing, or contraindication findings against the patient's full medication list and chart.
  • Catch missed interactions, stale patient data, and monograph guidance superseded by newer Special Alerts.
  • Judge completeness of the clinical picture, ensuring all active meds, labs, and comorbidities are considered.
  • Distinguish "permitted" from "appropriate" and flag poor drug choices for specific patients.
  • Verify that clinical conclusions are carried through with order updates, prescriber notifications, and documentation.

Qualifications

Must-Have

  • Frequent Lexidrug (or Lexicomp) use - weekly or more - in your current or recent role
  • 2+ years of professional pharmacy experience, inpatient/hospital setting strongly preferred
  • Reflexive use of Interactions, Trissel's, and monograph sections
  • PharmD and active pharmacy license, or equivalent verification-heavy clinical experience
  • Strong working knowledge in at least 2–3 specialized areas above, tied to your practice setting

Preferred

  • Prior data annotation, labeling, or AI evaluation experience

Application Process (Takes 20–30 mins to complete)

  • Upload resume
  • AI interview based on your resume
  • Submit form

Resources & Support

  • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome
  • For any help or support, reach out to: support@mercor.com

PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.