Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure of impactful, technically demanding work * Contribute to ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure of impactful, technically demanding work * Contribute to ...
... online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the ... About the Role As a Lead Data Annotation Business Analyst at Matterport, a part of CoStar Group ...
... online marketplaces. Included in the S&P 500 Index, CoStar Group is on a mission to digitize the ... About the Role As a Lead Data Annotation Business Analyst at Matterport, a part of CoStar Group ...
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy paired with technically meaningful, high-impact work * Collaborate with sharp ...
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy paired with technically meaningful, high-impact work * Collaborate with sharp ...
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy with the substance of high-impact engineering work * Potential for ongoing ...
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy with the substance of high-impact engineering work * Potential for ongoing ...
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy with the depth and consistency of meaningful, long-term technical work
Develop full-stack tooling and backend services for data annotation, validation, and quality ... Freelance autonomy with the depth and consistency of meaningful, long-term technical work
We have been living and breathing the world of real estate information and online marketplaces for ... From sampling data and creating annotation guidelines to reviewing outputs and integrating results ...
We have been living and breathing the world of real estate information and online marketplaces for ... From sampling data and creating annotation guidelines to reviewing outputs and integrating results ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure of meaningful, high-impact technical work * Build systems ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure of meaningful, high-impact technical work * Build systems ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure and consistency of ongoing, meaningful project work * Tackle ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the structure and consistency of ongoing, meaningful project work * Tackle ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Develop full-stack backend services and tooling for data annotation, validation, and quality ... Freelance autonomy paired with the structure of meaningful, technically challenging work
Develop full-stack backend services and tooling for data annotation, validation, and quality ... Freelance autonomy paired with the structure of meaningful, technically challenging work
Develop full-stack tooling and backend services for large-scale data annotation , validation, and ... Freelance autonomy with the structure of a focused, collaborative engineering team * Potential for ...
Develop full-stack tooling and backend services for large-scale data annotation , validation, and ... Freelance autonomy with the structure of a focused, collaborative engineering team * Potential for ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the depth and meaning of high-impact engineering work * Contribute directly ...
Develop full-stack tooling and backend services for large-scale data annotation, validation, and ... Freelance autonomy with the depth and meaning of high-impact engineering work * Contribute directly ...
Language Data Annotator (US)
Dallas, TX · On-site +1
Freelance Location: Texas, work from home Work Schedule: Part-time - 10+ hours per week. Flexible ... quality assurance, and data annotation and labeling. What We Offer * Flexible schedule
Language Data Annotator (US)
Dallas, TX · On-site +1
Freelance Location: Texas, work from home Work Schedule: Part-time - 10+ hours per week. Flexible ... quality assurance, and data annotation and labeling. What We Offer * Flexible schedule
Language Data Annotator (US)
Dallas, TX · On-site +1
Freelance Location: Texas, work from home Work Schedule: Part-time - 10+ hours per week. Flexible ... quality assurance, and data annotation and labeling. What We Offer * Flexible schedule
Language Data Annotator (US)
Dallas, TX · On-site +1
Freelance Location: Texas, work from home Work Schedule: Part-time - 10+ hours per week. Flexible ... quality assurance, and data annotation and labeling. What We Offer * Flexible schedule
Freelance * Pay Rate: $40 USD /hour * Expected capacity: 20 hours per week * Start date: As soon as ... Roles involving AI data annotation, content quality review, search quality rating, or similar.
Quick apply
Freelance * Pay Rate: $40 USD /hour * Expected capacity: 20 hours per week * Start date: As soon as ... Roles involving AI data annotation, content quality review, search quality rating, or similar.
... Freelance Audio Contributors. This is your chance to be on the front lines of how AI learns to ... Prior experience in transcription, voice work, or data annotation is a plus but not required Why ...
... Freelance Audio Contributors. This is your chance to be on the front lines of how AI learns to ... Prior experience in transcription, voice work, or data annotation is a plus but not required Why ...
Tamil Translator (Remote) | Sigma AI
$45K - $58K/yr
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Tamil Translator (Remote) | Sigma AI
$45K - $58K/yr
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Sigma is a leading global technology company specializing in data collection and annotation for ... online platform available 24/7. This opportunity is offered for freelancers under a commercial ...
Freelance Online Data Annotation information
See salary details
$11.06 - $12.63
1% of jobs
$12.63 - $14.20
5% of jobs
$14.20 - $15.78
13% of jobs
$16.30 is the 25th percentile. Wages below this are outliers.
$15.78 - $17.35
19% of jobs
The median wage is $18.40 / hr.
$17.35 - $18.92
19% of jobs
$18.92 - $20.50
15% of jobs
$21.20 is the 75th percentile. Wages above this are outliers.
$20.50 - $22.07
9% of jobs
$22.07 - $23.65
8% of jobs
$23.65 - $25.22
6% of jobs
$25.22 - $26.79
3% of jobs
$26.79 - $28.37
2% of jobs
$11
$19
$28
How much do freelance online data annotation jobs pay per hour?
As of Jun 11, 2026, the average hourly pay for freelance online data annotation in the United States is $19.47, according to ZipRecruiter salary data. Most workers in this role earn between $16.35 and $21.88 per hour, depending on experience, location, and employer.
What is the difference between Freelance Online Data Annotation vs Data Labeler?
| Aspect | Freelance Online Data Annotation | Data Labeler |
|---|---|---|
| Credentials | Basic computer skills, attention to detail | Similar, often no formal certification required |
| Work Environment | Remote, flexible hours | Remote or on-site, depending on employer |
| Industry Usage | Used across AI, machine learning projects | Primarily in AI data preparation |
| Search & Comparison Intent | Freelance online data annotation vs data labeler |
Freelance Online Data Annotation involves independently completing annotation tasks for various clients, offering flexibility and a wide range of projects. Data Labeler typically refers to a similar role but may be employed directly by a company or in a more structured environment. Both roles require attention to detail and basic technical skills, but freelancers often have more control over their workload and clients.
More about Freelance Online Data Annotation jobs
What cities are hiring for Freelance Online Data Annotation jobs? Cities with the most Freelance Online Data Annotation job openings:
What are the most commonly searched types of Online Data Annotation jobs? The most popular types of Online Data Annotation jobs are:
What states have the most Freelance Online Data Annotation jobs? States with the most job openings for Freelance Online Data Annotation jobs include:
What job categories do people searching Freelance Online Data Annotation jobs look for? The top searched job categories for Freelance Online Data Annotation jobs are:
Other
Posted 6 days ago
Job description
Senior C# Full-Stack Engineer - AI Data & Infrastructure
About the Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior C# Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on every day.
This is a fully remote contract role with meaningful technical depth and real production impact. You'll work alongside data, research, and engineering teams at the frontier of AI development - solving hard problems at scale.
About the Role
What if your C# expertise could directly shape the infrastructure powering the next generation of AI? We're looking for a Senior C# Full-Stack Engineer to build and optimize the data pipelines, annotation tooling, and evaluation systems that leading AI labs depend on every day.
This is a fully remote contract role with meaningful technical depth and real production impact. You'll work alongside data, research, and engineering teams at the frontier of AI development - solving hard problems at scale.
- Organization
: Alignerr - Type
: Hourly Contract - Location
: Remote - Commitment
: 20-40 hours/week
- Design, build, and optimize high-performance C# systems supporting AI data pipelines and evaluation workflows
- Develop full-stack tooling and backend services for large-scale data annotation, validation, and quality control
- Improve reliability, performance, and safety across existing C# codebases
- Collaborate with data, research, and engineering teams to support model training and evaluation workflows
- Identify bottlenecks and edge cases in data and system behavior - then implement scalable, production-ready fixes
- Participate in synchronous design and code reviews to iterate on system architecture and implementation decisions
- Native or fluent English speaker with clear written and verbal communication skills
- Experienced full-stack developer with a strong systems programming background
- 3-5+ years of professional experience writing production C# with a focus on modern standards
- Deep understanding of performance optimization, concurrency (threading, atomics), and memory safety
- Self-directed and reliable - able to commit 20-40 hours per week and deliver without hand-holding
- Prior experience with data annotation, data quality, or evaluation systems
- Familiarity with AI/ML workflows, model training, or benchmarking pipelines
- Experience with distributed systems or developer tooling
- Background in C++17/C++20 or other systems-level languages
- Work on real production systems used by leading AI research labs
- Fully remote - work from anywhere, on a schedule that suits you
- Freelance autonomy with the structure of impactful, technically demanding work
- Contribute to infrastructure that directly influences how next-generation AI models are built and evaluated
- Potential for ongoing work and contract extension as new projects launch