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María Guerra

María Guerra

Data Annotation Specialist | Image, Text & Video Labeling Expert

Venezuela flagBarquisimeto, Venezuela
$6.00/hrExpertCVATLabelboxOneforma

Key Skills

Software

CVATCVAT
LabelboxLabelbox
OneFormaOneForma
Scale AIScale AI
RemotasksRemotasks

Top Subject Matter

No subject matter listed

Top Data Types

AudioAudio
ImageImage
VideoVideo

Top Task Types

Bounding Box
Object Detection
Point Key Point
Polygon
Segmentation

Freelancer Overview

I am a Data Annotation Specialist with over 6 years of experience providing high-quality training data for AI and machine learning projects. My expertise spans a wide range of annotation techniques, including bounding boxes, polygons, segmentation masks, cuboids, LiDAR 3D labeling, keypoints, and multi-class classification. I have worked extensively with leading platforms such as CVAT, Labelbox, Hivework, Roboflow, and custom in-house tools, consistently delivering precise and consistent annotations that meet strict project guidelines. Throughout my career, I have contributed to diverse projects, from autonomous vehicle perception systems and agricultural image classification (agave identification) to LLM-based content evaluation for Pinterest. I bring strong attention to detail, a commitment to quality control, and the ability to adapt quickly to new tools and workflows. My track record demonstrates not only technical skill but also reliability in meeting deadlines and ensuring data accuracy for high-impact AI applications.

ExpertEnglishSpanish

Labeling Experience

CVAT

Data Annotation Specialist Citadelta AnnotationTeam

CVATImageBounding Box
ProgramDelivered precise annotations for assigned projects, consistently meeting deadlines. Developed proficiency in CVAT tools, ensuring high-qualityresults in data annotation tasks.

ProgramDelivered precise annotations for assigned projects, consistently meeting deadlines. Developed proficiency in CVAT tools, ensuring high-qualityresults in data annotation tasks.

2024
Scale AI

Team Lead - Data Annotation (GIS & 3D Projects) Remotasks Tiers Program

Scale AIImageBounding BoxPolygon
Managed a team of GIS and 3D annotation specialists, ensuring accuracy and quality in data annotation. Established and maintained rigorousquality standards, oversaw deadline adherence, and utilized data sheets to monitor team performance and productivity

Managed a team of GIS and 3D annotation specialists, ensuring accuracy and quality in data annotation. Established and maintained rigorousquality standards, oversaw deadline adherence, and utilized data sheets to monitor team performance and productivity

2024
Labelbox

Data Annotation Specialist Innodata

LabelboxImageClassificationQuestion Answering
Delivered precise annotations for assigned projects, consistently meeting deadlines. Developed proficiency in CVAT tools, ensuring high-qualityresults in data annotation tasks.

Delivered precise annotations for assigned projects, consistently meeting deadlines. Developed proficiency in CVAT tools, ensuring high-qualityresults in data annotation tasks.

2025 - 2025
Scale AI

Lead Trainer Remotasks Bootcamp Latam

Scale AIImageBounding BoxPolygon
Supervised and guided a team of trainers, ensuring consistent knowledge transfer on annotation guidelines, tool usage, and quality standards. Designed and delivered targeted training sessions, coordinated group activities, and managed progress tracking sheets to monitor productivity and quality. Consistently maintained high annotation accuracy and met project deadlines.

Supervised and guided a team of trainers, ensuring consistent knowledge transfer on annotation guidelines, tool usage, and quality standards. Designed and delivered targeted training sessions, coordinated group activities, and managed progress tracking sheets to monitor productivity and quality. Consistently maintained high annotation accuracy and met project deadlines.

2021 - 2023
Scale AI

Trainer Remotasks Bootcamp Latam

Scale AIImageBounding BoxPolygon
Trained new taskers in data annotation techniques, ensuring a thorough understanding and accurate application of platform guidelines.Facilitated the development of team members’ skills through continuous feedback and support, fostering an environment of improvement andcollaboration.

Trained new taskers in data annotation techniques, ensuring a thorough understanding and accurate application of platform guidelines.Facilitated the development of team members’ skills through continuous feedback and support, fostering an environment of improvement andcollaboration.

2020 - 2021

Education

I

IUTIRLA

TSU, Industrial Relations

TSU
2009 - 2013

Work History

No Work History added yet

María G. hasn’t added any Work History to their OpenTrain profile yet.