Antony Wachira

Key Skills

Software

CVAT

Labelbox

Label Studio

Doccano

Top Subject Matter

Autonomous Vehicles

Computer Vision

Urban Planning

Top Data Types

Text

Image

Document

Top Task Types

Segmentation

Entity Ner Classification

Bounding Box

Polygon

Object Detection

RLHF

Freelancer Overview

Senior Data Annotator | Sama AI Solutions. Brings 3+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Sama, Internal, and Proprietary Tooling. Education includes Bachelor of Science, Catholic University (2018). AI-training focus includes data types such as Geospatial, Tiled Imagery, and Text and labeling workflows including Segmentation, Entity (NER) Classification, and Bounding Box.

Labeling Experience

Senior Data Annotator | Sama AI Solutions

SamaSegmentation

Served as Senior Data Annotator for autonomous drone navigation projects. Performed high-precision semantic segmentation on satellite images to detect urban infrastructure changes. Developed and implemented improved labeling guidelines and conducted daily quality audits. • Oversaw a team of 10+ annotators for large vision datasets. • Labeled 50,000+ frames monthly targeting safety-critical AI use. • Authored 'Edge Case' handbook, reducing ambiguity by 15%. • Conducted comprehensive QA for high compliance standards.

Served as Senior Data Annotator for autonomous drone navigation projects. Performed high-precision semantic segmentation on satellite images to detect urban infrastructure changes. Developed and implemented improved labeling guidelines and conducted daily quality audits. • Oversaw a team of 10+ annotators for large vision datasets. • Labeled 50,000+ frames monthly targeting safety-critical AI use. • Authored 'Edge Case' handbook, reducing ambiguity by 15%. • Conducted comprehensive QA for high compliance standards.

2025 - 2026

AI Content Associate | Next Idea Tech

TextEntity Ner Classification

Worked as an AI Content Associate, specializing in NER tasks on financial documentation. Contributed to NLP model training via categorization and emotion annotation for social media datasets. Enhanced labeling processes through collaboration with engineering and linguistic teams. • Labeled financial and legal entities for data extraction AI projects. • Ranked and classified search results for relevance tasks. • Provided detailed UI/UX feedback on proprietary tools. • Labeled emotional sentiment and sarcasm in social text datasets.

Worked as an AI Content Associate, specializing in NER tasks on financial documentation. Contributed to NLP model training via categorization and emotion annotation for social media datasets. Enhanced labeling processes through collaboration with engineering and linguistic teams. • Labeled financial and legal entities for data extraction AI projects. • Ranked and classified search results for relevance tasks. • Provided detailed UI/UX feedback on proprietary tools. • Labeled emotional sentiment and sarcasm in social text datasets.

2024 - 2025

Data Labeler (Contract) | Hevo Data

CVATImageBounding Box

Operated as contract Data Labeler handling large scale image and 3D sensor data projects. Applied bounding box annotation to over 100,000 retail images and performed Lidar point cloud labeling for automotive applications. Consistently exceeded quality and productivity expectations. • Labeled retail inventory images with precision bounding boxes. • Annotated Lidar/3D point clouds for object and pedestrian detection. • Maintained a 99.5% quality score across all deliverables. • Managed weekly quotas and client submission timelines.

Operated as contract Data Labeler handling large scale image and 3D sensor data projects. Applied bounding box annotation to over 100,000 retail images and performed Lidar point cloud labeling for automotive applications. Consistently exceeded quality and productivity expectations. • Labeled retail inventory images with precision bounding boxes. • Annotated Lidar/3D point clouds for object and pedestrian detection. • Maintained a 99.5% quality score across all deliverables. • Managed weekly quotas and client submission timelines.

2024 - 2024

Education

Work History