Computer Vision Annotator - Contractor

Sword Health; Portugal; Remote; EUR 13,000 - 20,000; Full time

Job summary

Sword Health is seeking a meticulous image and video annotator to label physical exercise data using our internal tools. You will apply structured guidelines consistently, review peers’ work, and ensure high accuracy across large volumes.

Remote, full-time role based in Portugal. No clinical or technical background required, training provided, with a focus on scalable data annotation for AI care initiatives.

Qualifications

• High attention to detail and precision are essential.
• Experience with data annotation, QA, or content review is a plus.
• Ability to work with structured labeling guidelines and handle repetitive tasks.

Responsibilities

• Annotate images and videos of people performing physical exercises using internal tools.
• Review and quality-check work produced by other annotators.
• Apply structured guidelines consistently across high volumes and flag quality issues.

Skills

Attention to detail

High-volume work

Structured guidelines

Data annotation

QA review

Anatomy familiarity

Reliable internet

Job description

At Sword, we’re building AI to heal billions and unlock humanity’s full potential. In doing so, we’re pioneering AI Care, a fundamentally new approach to healthcare built for medical reasoning, safety, and real-time treatment, not generic technology applied after the fact. As both a clinical-centric frontier AI lab and an applied AI platform, Sword is reimagining how care is delivered at scale, removing traditional barriers like appointments, waiting rooms, and stigma so more people can access the care they need—and ultimately get back to lives lived in full. Since 2020, Sword has expanded across physical therapy, women’s health, cardiometabolic, and mental health, and is now moving beyond the session to a fully AI-native, 24/7 care program that brings physical activity, therapeutic exercise, psychotherapy, nutrition, and behavior change into one connected experience. More than 700,000 members across three continents have completed over 10 million AI sessions, helping 1,000+ enterprise clients avoid more than $1 billion in unnecessary healthcare costs. Backed by 42 clinical studies, 44+ patents, and more than $500 million raised from leading investors including Khosla Ventures, General Catalyst, and Founders Fund, Sword is defining a new standard for healthcare.

Role Computer vision models learn from labeled data – they are only as good as the annotations behind them.

Your job is to label images and videos of people performing physical exercises, across a range of annotation tasks, using Sword's internal tooling.

This is focused, detail-oriented work that spans multiple annotation types and evolves as our pipelines grow.

You are expected to pick up new task types quickly and maintain high consistency across large volumes.

The Data & Tooling team (part of the Algorithms org) builds the labeled datasets that train Sword's proprietary computer vision models.

We develop the data foundation that enables our AI to see, understand, and interpret human movement.

What you’ll be doing

• Annotating images and videos of people performing physical exercises across a variety of labeling tasks
• Reviewing and quality-checking work produced by other annotators
• Applying structured guidelines consistently across high volumes
• Flagging quality issues, edge cases, and ambiguous content
• Adapting to new annotation task types as team needs evolve
• Working full-time (40 hours/week), remotely, using Sword's internal and web-based annotation tools

What you need to have

• High attention to detail – precision and consistency are the job
• Comfortable with high-volume, repetitive digital work for sustained periods
• Quick to understand and apply structured guidelines
• Experience with data annotation, QA, or content review is a plus
• Basic familiarity with human anatomy is helpful but not required (full training provided)
• Reliable internet connection and a desktop or laptop computer
• No clinical or technical background required

Note: Please note that this position does not offer relocation assistance.

Candidates must possess a valid EU visa and be based in Portugal.

Sword Health complies with applicable Federal and State civil rights laws and does not discriminate on the basis of Age, Ancestry, Color, Citizenship, Gender, Gender expression, Gender identity, Gender information, Marital status, Medical condition, National origin, Physical or mental disability, Pregnancy, Race, Religion, Caste, Sexual orientation, and Veteran status.