Lora D.

Key Skills

Software

Labelbox

CVAT

Dataloop

Appen

Remotasks

Scale AI

SuperAnnotate

Toloka

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Text

Image

Top Task Types

Bounding Box

Segmentation

Text Summarization

RLHF

Classification

Object Detection

Transcription

Freelancer Overview

TIFERANJI MALIJANI LISONGA 📍 Harare, Zimbabwe 📞 0773272872 📧 [email protected] PROFESSIONAL SUMMARY Detail-oriented and results-driven Data Annotation and Data Labeling Specialist with experience supporting Artificial Intelligence (AI) and Machine Learning (ML) projects through data preparation, annotation, classification, validation, and quality assurance. Skilled in image, text, audio, and video annotation, with a strong understanding of AI training workflows and data management processes. Demonstrated ability to deliver highly accurate results, meet strict deadlines, and work effectively with remote AI training and evaluation platforms. Possesses strong analytical, communication, and problem-solving abilities, with the capacity to work independently or collaboratively in fast-paced digital environments. PROFESSIONAL SKILLS  AI Data Annotation & Labeling  Image annotation using bounding boxes  Object detection and semantic segmentation  Text categorization and sentiment analysis  Audio transcription and speech labeling  Video annotation and frame-by-frame tagging  Named Entity Recognition (NER) and concept identification  Content moderation and quality review  Data tagging and classification  Prompt evaluation and response ranking  AI training data preparation  Dataset validation and quality assurance TECHNICAL SKILLS  Microsoft Word, Microsoft Excel, and Google Sheets  Data entry and database management  AI annotation and labeling platforms  Web research

Labeling Experience

Audio Annotation and Speech Transcription for AI Training

AudioTranscription

Transcribing audio recordings and labeled speech data to support automatic speech recognition 9ASR0 systems. Verifying transcription accuracy, speaker identification, and audio quality while following Project-specific annotation standards.

2023 - Present

Content Moderation and Data Quality Review

TextClassification

Reviewing and classifying user-generated content according to moderation guidelines. Identifying policy-violating ,harmful, or inappropriate content while ensuring data quality, consistency, and compliance with establishes standards.

2023 - Present

AI Response Evaluation and Reinforcement Learning Data Assessment

TextEvaluation/Rating

Evaluating and ranking AI generated responses based on accuracy, relevance, safety and instruction adherence. Identifying errors and quality issues while providing feedback to improve model performance and support human-in-the-loop AI training process

2023 - Present

Text Classification and Sentiment Analysis for NLP Models

TextClassification

Classifying and labelling text data to support Natural Language Processing (NLP)Models. Analyzing content for sentiment, intent, and relevance while ensuring consistency with annotation guidelines. Contributing to the development of high-quality datasets used for language understanding and AI training.

2023 - Present

Image Annotation and Bounding Box Labeling for AI Model Training

ImageBounding Box

Annotating large-scale image datasets using bounding box techniques to support the training and validation of computer vision and machine learning models. Identifying and label projects accurately according to project guidelines and quality standards. Conduct dataset reviews, quality assurance checks, and error correction to ensure annotation consistency. Collaborating remotely with project teams to meet deadlines while maintaining high accuracy and productivity. Contributing to the development of AI systems used for object detection and image recognition tasks.

2023 - Present

Education