Data Annotation Jobs

Serve Robotics is hiring a Software Engineer for ML Infrastructure to build scalable data pipelines, search, and annotation integrations that power fleet-scale autonomy and ML research.

Lendbuzz seeks a Machine Learning Co-op to annotate chat data, develop prompts and RAG workflows, and support chatbot improvements for sales and collections in our Boston office.

A remote Data Quality Annotator role to annotate and review text, image, and other data types at $45/hr, contributing directly to AI model training and quality improvements.

An MBA internship focused on technical brand storytelling and developer-focused marketing to amplify Centific’s AI data and platform capabilities across research and enterprise communities.

CloudFactory is recruiting US-licensed pathologists, radiologists, and cardiologists to join a remote expert network providing clinical guidance for AI and medical data projects.

Work remotely as an independent contractor labeling and classifying text, image, and multimedia data to support cutting-edge AI research at an hourly rate of $45.

Startup Mindset

Collaboration over Competition

Growth & Learning

Inclusive & Diverse

Lead data annotation operations at Cohere to translate AI safety needs into high-quality, scalable labeling programs while managing internal teams and external vendors.

RWS is seeking freelance Uyghur-speaking content evaluators to annotate website content and help improve AI language models on a fully remote, flexible schedule.

Mercor is hiring an AI Researcher in San Francisco to lead LLM evaluation research, publish benchmark papers, and build dataset and annotation offerings for top AI labs.

Support the development and safety of AI by performing remote data collection, annotation, and evaluation tasks for RWS on a flexible, part-time basis.

Fixpoint is seeking detail-oriented visual annotators to evaluate and annotate AI-edited images in a flexible remote contract role.

Lead the QA strategy for GenAI-powered e-learning features by designing prompt validation, HITL review workflows, and measurable evaluation protocols to ensure safe, reliable model behavior.

Work remotely as a contract LLM Agent Trainer to design realistic multi-turn dialogues and tool-usage examples in Swedish, Norwegian, Danish, or Traditional Chinese to improve and benchmark a healthcare AI platform.

Work remotely as a Data Analyst producing and evaluating high-quality data and feedback to help improve AI systems for a US-based partner.

Lead revenue strategy and enterprise sales for a San Francisco AI data services unit, building the commercial foundation and strategic partnerships to scale the business.

Pharos is seeking a medically trained Physician AI Researcher to bring clinical rigor to AI model development and validation, shaping tools that improve patient safety across hospitals.

Work remotely across AI projects to create, evaluate, and refine high-quality written data and prompts that improve model performance and user experience.

Work remotely as a Data Analyst producing and evaluating high-quality data to improve AI system performance while collaborating with a global network of experts.

Help improve a digital assistant by recording and annotating short, realistic mobile video interactions as a freelance contributor.

Lead Medal’s video data quality program to turn messy, high-volume media into reliable datasets that improve ML-driven creator experiences.

A fully remote Data Analyst role for US-based contributors to create and evaluate high-quality written data that improves AI system performance.

Welo Data is hiring a Prompt Engineer & Data Analyst to design and evaluate prompts, curate datasets, and perform rigorous model analysis to enhance LLM capabilities and safety.

Contribute remotely to AI system improvement by creating, evaluating, and refining high-quality content and prompts that enhance model performance and user experience.

Lead a cross-functional delivery squad at Welo Data to drive client-facing AI data programs, operational excellence, and OKR-driven results.

Lead high-stakes, cross-functional projects at a YC-backed startup providing premium AI training datasets, managing contracts with top AI labs and large annotation teams.

Medal is seeking a Senior/Lead Data Analyst to lead video data quality efforts, building KPIs, audits, and ground-truth pipelines that make ML features more accurate and reliable for millions of gamers.

Inclusive & Diverse

Diversity of Opinions

Collaboration over Competition

Transparent & Candid

Passion for Exploration

Rapid Growth

Social Impact Driven

Mission Driven

Medical Insurance

Dental Insurance

Vision Insurance

Maternity Leave

Paternity Leave

Paid Time-Off

Equity

401K Matching

Commuter Benefits

Learning & Development

WFH Reimbursements

Anthropic seeks a Strategic Sourcing Business Partner to lead procurement of compute, cloud, and R&D services, building strategic supplier relationships that accelerate AI research and innovation.

Contribute to improving AI by annotating and evaluating Hindi and English model outputs for a remote, part-time role at RWS.

Contribute to improving AI reliability as a part-time Bengali Data Annotator for RWS, working remotely across eligible US states.

Work remotely as a part-time Vietnamese-English data annotator for RWS, evaluating and improving AI model responses while receiving full training.

Help improve AI model outputs by reviewing and annotating Tagalog and English responses in a part-time, remote role with RWS.

Contribute to improving AI reliability as a part-time Data Annotator reviewing and refining AI outputs in Brazilian Portuguese and English for a global language services company.

Support AI quality from home as a part-time German-English Data Annotator for RWS, reviewing, scoring, and improving model responses.

RWS seeks US-based, part-time Indonesian-English data annotators to remotely evaluate and improve AI model outputs.

RWS is hiring US-based native English Data Annotators to remotely evaluate and improve AI-generated responses in a flexible part-time W2 role.

Contribute to refining AI language models as a part-time Thai-English data annotator for a global language-services firm, working remotely from approved US states.

Work remotely as an AI Data Specialist for RWS, performing annotation, evaluation, and tagging tasks to improve English AI outputs on a flexible, part-time contract basis.

Use your licensed broker experience to train and validate AI systems that understand real estate transactions, compliance, and complex sales workflows for a remote-first startup studio.