Mahlatse Phiri

Key Skills

Software

Toloka

Top Subject Matter

Natural Language Processing

Sentiment Analysis

Computer Vision

Top Data Types

Text

Image

Video

Audio

Document

Top Task Types

Entity Ner Classification

Bounding Box

Object Detection

Transcription

Freelancer Overview

Data Annotator (Freelancer). Brings 10+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Toloka. Education includes Diploma in Information Technology, Damelin College (2018) and Matriculation (Grade 12), Mamabudusha Secondary School (2009). AI-training focus includes data types such as Text, Image, and Video and labeling workflows including Entity (NER) Classification, Bounding Box, and Object Detection.

Labeling Experience

Data Annotator (Freelancer)

TolokaAudioTranscription

As a Data Annotator with Toloka Yandex, I was tasked with annotating audio data through speech-to-text transcriptions and audio event tagging. My contributions aimed to enhance voice recognition and speaker identification systems for AI model training. Consistent review of transcribed audio ensured the final dataset met project standards. • Transcribed audio samples for speech-to-text projects • Applied speaker identification labeling • Tagged audio events for detection • Monitored transcription accuracy for quality control

As a Data Annotator with Toloka Yandex, I was tasked with annotating audio data through speech-to-text transcriptions and audio event tagging. My contributions aimed to enhance voice recognition and speaker identification systems for AI model training. Consistent review of transcribed audio ensured the final dataset met project standards. • Transcribed audio samples for speech-to-text projects • Applied speaker identification labeling • Tagged audio events for detection • Monitored transcription accuracy for quality control

2022 - Present

Data Annotator (Freelancer)

TolokaVideoObject Detection

During my tenure as a Data Annotator at Toloka Yandex, I performed object labeling and segmentation on video data to support computer vision applications. Responsibilities included identifying key objects and actions within video frames and ensuring accurate data for ML model development. I regularly reviewed and corrected labels to meet project guidelines. • Segmented and labeled objects in video frames • Performed object/action detection on video datasets • Maintained data integrity for video annotation tasks • Integrated feedback to refine video labeling processes

During my tenure as a Data Annotator at Toloka Yandex, I performed object labeling and segmentation on video data to support computer vision applications. Responsibilities included identifying key objects and actions within video frames and ensuring accurate data for ML model development. I regularly reviewed and corrected labels to meet project guidelines. • Segmented and labeled objects in video frames • Performed object/action detection on video datasets • Maintained data integrity for video annotation tasks • Integrated feedback to refine video labeling processes

2022 - Present

Data Annotator (Freelancer)

TolokaImageBounding Box

As part of my role as a Data Annotator at Toloka Yandex, I applied bounding boxes, segmentation, and object labeling on images for computer vision model development. My task was to accurately identify and label specific objects within images to train object detection and recognition algorithms. Quality control was a significant aspect to ensure annotated images met required standards. • Drew bounding boxes and segmented image features • Labeled objects in images for CV training • Ensured labeling quality and compliance • Assisted with dataset expansion for image domains

As part of my role as a Data Annotator at Toloka Yandex, I applied bounding boxes, segmentation, and object labeling on images for computer vision model development. My task was to accurately identify and label specific objects within images to train object detection and recognition algorithms. Quality control was a significant aspect to ensure annotated images met required standards. • Drew bounding boxes and segmented image features • Labeled objects in images for CV training • Ensured labeling quality and compliance • Assisted with dataset expansion for image domains

2022 - Present

Data Annotator (Freelancer)

TolokaTextEntity Ner Classification

As a Data Annotator at Toloka Yandex, I accurately labeled and tagged large volumes of text for machine learning model training. My responsibilities included annotating textual data for sentiment analysis, named entity recognition, and part-of-speech tagging to support natural language processing models. I also conducted quality checks to ensure data consistency and adherence to predefined standards. • Labeled text data to train NLP and sentiment analysis models • Performed quality checks for annotated data • Ensured annotation accuracy and consistency • Collaborated to resolve inconsistencies in text annotations

As a Data Annotator at Toloka Yandex, I accurately labeled and tagged large volumes of text for machine learning model training. My responsibilities included annotating textual data for sentiment analysis, named entity recognition, and part-of-speech tagging to support natural language processing models. I also conducted quality checks to ensure data consistency and adherence to predefined standards. • Labeled text data to train NLP and sentiment analysis models • Performed quality checks for annotated data • Ensured annotation accuracy and consistency • Collaborated to resolve inconsistencies in text annotations

2022 - Present

Education

Work History