Platform Overview
Hire, manage, and pay top AI Trainers & Data Labelers in one place while working in the tools you already use
Find Data Labeling Vendors
Browse vetted agencies and BPOs for large-scale projects.
List your data labeling company
Create a free company profile, receive matched RFPs, and submit proposals with your pricing, capacity, and timeline.
JOIN AS Freelancer
The #1 Platform for Finding AI Training Jobs
We bring AI training and data labeling jobs from 20+ platforms into one place.
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
JOIN AS Freelancer
The #1 Platform for Finding AI Training Jobs
We bring AI training and data labeling jobs from 20+ platforms into one place.
LLM & Agents
View All LLM & Agent Solutions
Structured Data Labeling
View Data Labeling Solutions
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
Work With Us
Hire Freelancers
Post a Job to the #1 Network for AI Training Talent Now
Post your job and find pre-vetted AI Trainers & Data Labelers across any domain, language, or tool.
FOR LARGE PROJECTS / MANAGED SERVICE
Done-for-You AI Data Teams
For large or complex projects. We recruit, train, manage, and QA your team inside your tools.
Data Labeling Solutions / Time Series Annotation
Find Expert Time Series Annotators for Any Tool
Post a job and hire annotators for event labeling, anomaly detection, and state classification in any platform. Experts who understand sensor data and operational context across industrial, healthcare, finance, and more. 100,000+ pre-vetted Data Labelers.
Why Top AI Teams Choose OpenTrain for Time Series Annotation
Annotators to Domain Experts
Annotators, industry specialists, and QA reviewers for any project
Use Any Tool
Work inside any time series viewer, labeling platform, or internal dashboard
Any Industry or Signal Type
Industrial, healthcare, finance, infrastructure, and more
All-In-One
One Place to Hire and Manage Your Time Series Annotation Team
Everything you need to build a team that delivers accurate event labels, consistent state classifications, and gold-standard datasets for your ML models.
The #1 Network for Time Series Annotation Talent
Time series annotators, domain specialists, and QA reviewers across industrial, healthcare, finance, infrastructure, and more. Find talent who can read complex signals and interpret patterns for any project.
Post a Time Series Annotation Job
Invite Hires Into Any Labeling Platform
Data Labelers work inside any time series viewer, annotation tool, or your internal dashboards. You control access and permissions. Your data never leaves your systems.
Post a Time Series Annotation Job
Communication and Project Hub
Built-in chat, document editor, and everything you need to coordinate annotation across distributed teams. Share labeling guidelines, run calibration sessions, and keep your team aligned on edge cases.
Post a Time Series Annotation Job
Secure Global Payments and Transparent Pricing
Pay Data Labelers in any country from a single dashboard. You set the rates, we add a small fixed fee on top. No hidden costs, no chasing invoices.
Post a Time Series Annotation Job
Why OpenTrain 
Hire Time Series Annotators for Any Event or Signal Labeling Task
Post a job and get a shortlist of qualified time series annotators, domain specialists, and QA reviewers ready to work in any labeling tool or internal dashboard. Hire for:
Event labeling for faults, incidents, and device activations
Anomaly detection and severity classification
State labeling for operational modes and regimes
Change point detection across sensor channels
QA and adjudication for gold-standard evaluation sets
How It Works
How OpenTrain Works for Time Series Annotation
Create your account, post a job, and hire Data Labelers who work inside your existing tooling.
01
Post a Time Series Annotation Job & Receive Pre-Vetted Applicants
Describe your project and the skills you need. Receive proposals from time series annotators, domain specialists, and QA reviewers with proven experience in your industry.
02
Hire and Add to Any Labeling Platform
Review candidates, make your hires, and invite them to any time series viewer, annotation tool, or your internal dashboards.
03
Communicate and Pay in One Place
Share labeling guidelines and event definitions, message your team, and handle global payments from a single dashboard.
Post Your Time Series Annotation Job Now
Create an account and post your first job in minutes.
Post a Time Series Annotation Job Large Project? We Can Help.
Get a dedicated team managed end-to-end for large time series annotation projects.
Get a Managed Service Quote Get Started
Start Building Your Time Series Annotation Team Today
Post your first job and connect with time series annotators, domain specialists, and QA reviewers who work inside any labeling platform or your own internal environment.
Metrics
Where AI Teams Hire for Time Series Annotation at Scale
The largest network of time series annotators, domain specialists, and QA reviewers, ready to work in any labeling platform or custom environment.
100K+
pre-vetted data labeling specialists
50+
industries and specializations
24 hrs
avg. time from job post to production start
FAQ
FAQs about Hiring for Time Series Annotation
Quick answers to common questions about time series annotation projects and Data Labeler hiring on OpenTrain.
You can hire for event labeling, anomaly detection, state classification, change point detection, and more. Whether you need annotators to mark fault windows in sensor data, label operational regimes, or identify anomalies in telemetry streams, you can find people with the right experience.
Yes. Our network includes annotators with backgrounds in industrial operations, healthcare, finance, energy, infrastructure, and more. You can filter candidates by industry and require specific technical knowledge in your job post.
Yes. You hire annotators on OpenTrain, then invite them into any tool you already use, such as Label Studio, Grafana, or your own internal dashboards. Your data stays in your systems.
Every Data Labeler on OpenTrain has a profile with work history, client reviews, and ratings from past projects. You can evaluate candidates based on their track record, filter by relevant experience, and hire annotators who have already proven themselves on similar work.
Our network covers industrial IoT, predictive maintenance, healthcare signals, financial data, smart grid, infrastructure monitoring, and more. You can hire annotators who understand your specific signal types and operational context.
For large or complex projects, we offer a managed service where we handle recruiting, onboarding, QA oversight, and team coordination end-to-end. Contact us for a managed service quote.
Integrations
Hire for Any Time Series Labeling Platform or Internal Tool
Hire Data Labelers on OpenTrain, then invite them to any annotation platform or your own internal environment.
Get Started
Join the #1 Platform for AI Training Talent
Where top AI builders and expert AI Trainers connect to build the future of AI.
Self-Service
Post a Job
Post your project and get a shortlist of qualified AI Trainers and Data Labelers. Hire and manage your team in the tools you already use.
Managed Service
For Large Projects Done-for-You
We recruit, onboard, and manage a dedicated team inside your tools. End-to-end operations for large or complex projects.
For Freelancers
Join as an AI Trainer
Find AI training and data labeling projects across platforms, all in one place. One profile, one application process, more opportunities.