Remote STEM Jobs in Canada

Remote STEM jobs in Canada at Rex.zone connect mid-senior engineers and STEM professionals to real-world AI/ML training workflows, including RLHF, data labeling, QA evaluation, prompt evaluation, and large language model evaluation. You will support LLM training pipelines by creating and reviewing high-quality training data, enforcing annotation guidelines compliance, and driving model performance improvement across NLP, computer vision, and content safety labeling use cases. Explore full-time remote roles across AI labs, tech startups, annotation vendors, and BPO teams—apply on Rex.zone to match with projects that fit your domain expertise, tooling, and quality standards.

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Remote STEM Jobs in Canada (Full Time)

LinkedIn Job Metadata: Date Posted: 25-02-2026 | Hiring Organization: Rexzone | Job Location: US | Workplace Type: Remote | Employment Type: FULL_TIME | Experience Level: Mid-Senior | Industry: Technology | Job Function: Engineering | Skills: Remote STEM, Engineering, AI/ML, LLM Evaluation, RLHF, Data Labeling, QA Evaluation, Prompt Evaluation, Named Entity Recognition, Computer Vision Annotation, Content Safety Labeling, Annotation Guidelines, Training Data Quality, LLM Training Pipelines | Salary Currency: USD | Salary Min: 63360 | Salary Max: 126720 | Pay Period: YEAR

About Rex.zone

Rex.zone is a remote-work platform that connects STEM talent to teams building and improving AI systems. The work spans training data creation, evaluation, and quality operations for modern ML products, including LLMs and multimodal models.

What You Will Do

Contribute to training data quality through labeling, review, and adjudication; perform RLHF-style preference ranking and helpfulness/harmlessness evaluation; execute prompt evaluation and response grading for large language model evaluation; apply annotation guidelines compliance and document edge cases; run QA evaluation workflows, track defects, and recommend process changes for model performance improvement; support NLP tasks such as named entity recognition and taxonomy tagging; support computer vision annotation such as bounding boxes, polygons, and image classification; support content safety labeling for policy categories, risk scoring, and refusals; collaborate with cross-functional teams across AI labs, tech startups, annotation vendors, and BPO operations.

Required Qualifications

Mid-senior experience in STEM or engineering; strong analytical writing and attention to detail for evaluation rubrics; familiarity with AI/ML concepts, LLM behavior, and model failure modes; experience with data labeling, QA evaluation, or guideline-driven review; ability to work full-time in a remote environment with reliable internet and secure work practices.

Preferred Qualifications

Hands-on exposure to RLHF, prompt evaluation, and rubric-based grading; experience with NLP (named entity recognition, text classification) and/or computer vision annotation; experience with content safety labeling and policy enforcement; comfort using annotation platforms, spreadsheets, and issue trackers; ability to mentor peers on annotation guidelines compliance and training data quality.

Tools and Workflows You May Use

Annotation platforms for text and image tasks; QA sampling and inter-annotator agreement checks; prompt libraries and evaluation templates; dataset versioning and documentation; dashboards for throughput, error rates, and audit results; secure remote workflows aligned with customer requirements.

How to Apply

Apply via Rex.zone to be considered for remote STEM jobs in Canada aligned to your engineering background. Your application should highlight domain expertise, evaluation experience, and examples of guideline-based work that improved training data quality or model performance improvement.

Frequently Asked Questions

  • Q: Are these remote STEM jobs in Canada full-time roles?

    Yes. This posting targets FULL_TIME remote roles, while also referencing common modifiers like contract and freelance for search coverage.

  • Q: What kinds of STEM work does Rex.zone place candidates into?

    Common workflows include data labeling, RLHF evaluation, prompt evaluation, QA evaluation, named entity recognition, computer vision annotation, and content safety labeling for LLM training pipelines.

  • Q: Do I need prior AI/ML experience to qualify?

    Mid-senior STEM or engineering experience is required. Prior exposure to LLM evaluation, RLHF, or annotation guidelines compliance is preferred and can strengthen your fit.

  • Q: What domains are most common in these remote roles?

    NLP, computer vision, and content safety are frequent domains, with large language model evaluation and training data quality as core priorities.

  • Q: Is the role marked as remote for LinkedIn and job aggregators?

    Yes. Workplace Type is Remote and should remain explicitly Remote across metadata and page content.

  • Q: What employer types might I work with through Rex.zone?

    Projects may come from AI labs, tech startups, annotation vendors, and BPO-style operations teams supporting enterprise AI programs.

  • Q: How is quality measured in data labeling and evaluation work?

    Quality is typically tracked using rubric adherence, annotation guidelines compliance, audit pass rates, inter-annotator agreement, sampling-based QA, and defect trend analysis tied to model performance improvement.

  • Q: What should I include in my application?

    Include STEM/engineering background, examples of guideline-driven work, experience with QA evaluation or review, familiarity with LLM training pipelines, and any RLHF or prompt evaluation experience.

230+Domains Covered
120K+PhD, Specialist, Experts Onboarded
50+Countries Represented

Industry-Leading Compensation

We believe exceptional intelligence deserves exceptional pay. Our platform consistently offers rates above the industry average, rewarding experts for their true value and real impact on frontier AI. Here, your expertise isn't just appreciated—it's properly compensated.

Work Remotely, Work Freely

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