Sisipho Tyumbu

Key Skills

Software

Appen

Axiom AI

Clickworker

CloudFactory

CrowdFlower

Data Annotation Tech

Dataloop

Figure Eight

Labelbox

Label Studio

Lionbridge

Mercor

Mindrift

OneForma

Scale AI

Toloka

Telus

Other

CVAT

Anno-Mage

Top Subject Matter

AI Model Training and Evaluation

Top Data Types

Image

Text

Video

Top Task Types

Bounding Box

Entity (NER) Classification

Evaluation/Rating

Prompt + Response Writing (SFT)

Question Answering

Segmentation

Text Generation

RLHF

Data Collection

Computer Programming/Coding

Object Detection

Classification

Freelancer Overview

AI Data Labeling Specialist. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Telus. AI-training focus includes data types such as Image and labeling workflows including Classification.

Labeling Experience

AI Audio Data Labeler & Annotator

TelusAudioPolygonClassification

Annotated and evaluated audio datasets for AI training, including transcription, classification, and quality assessment. Combined labeling and evaluation tasks to ensure accurate, high-quality data for speech recognition and NLP audio models.

Annotated and evaluated audio datasets for AI training, including transcription, classification, and quality assessment. Combined labeling and evaluation tasks to ensure accurate, high-quality data for speech recognition and NLP audio models.

2021 - Present

AI image data labelling expert

MindriftImageBounding BoxClassification

Annotated images for AI training, including bounding boxes, polygons, and classifications. Ensured high-quality, consistent labeling for autonomous driving and computer vision models. Combined label verification and quality control for large-scale datasets.

Annotated images for AI training, including bounding boxes, polygons, and classifications. Ensured high-quality, consistent labeling for autonomous driving and computer vision models. Combined label verification and quality control for large-scale datasets.

2021

AI Video Data labelling/Annotation

TelusVideoSegmentationClassification

Performed frame-by-frame video annotation, labeling moving objects and activities. Maintained high accuracy and consistency for AI video datasets. Integrated labeling and annotation tasks for reliable model training

Performed frame-by-frame video annotation, labeling moving objects and activities. Maintained high accuracy and consistency for AI video datasets. Integrated labeling and annotation tasks for reliable model training

2021

AI Text Generation Annotator

ClickworkerTextClassificationQuestion Answering

Labeled and evaluated AI-generated text for quality, accuracy, and alignment with prompts. Performed classification, QA, summarization, and translation tasks. Combined annotation and evaluation to ensure high-quality NLP training data.

Labeled and evaluated AI-generated text for quality, accuracy, and alignment with prompts. Performed classification, QA, summarization, and translation tasks. Combined annotation and evaluation to ensure high-quality NLP training data.

2020

Education

Work History