Dennis M.

Key Skills

Software

Label Studio

Appen

Toloka

Scale AI

Clickworker

Top Subject Matter

AI content moderation

general NLP

multilingual datasets (Oromo/English)

Top Data Types

Text

Audio

Image

Top Task Types

Classification

Transcription

Bounding Box

Freelancer Overview

Freelance AI Data Annotation & Evaluation. Core strengths include Label Studio, Appen, and Toloka. Education includes Bachelor of Science, Kirinyaga University (2025). AI-training focus includes data types such as Text, Audio, and Image and labeling workflows including Classification, Transcription, and Bounding Box.

Labeling Experience

Freelance AI Data Annotation & Evaluation

AppenText

I performed pairwise comparison tasks on AI-generated text to evaluate content accuracy, clarity, and safety. My duties included rating, ranking, and providing feedback on the quality of text outputs produced by AI models. I contributed to dataset improvement for supervised fine-tuning and RLHF. • Compared and rated AI-generated responses for quality • Assessed clarity, accuracy, and safety of outputs • Provided constructive feedback to improve models • Documented results in project databases

2022 - Present

Freelance AI Data Annotation & Evaluation

Label StudioImageBounding Box

I conducted image and video annotation projects focused on object tagging, bounding box annotation, and categorization. My responsibilities included accurately labeling objects, classifying images, and maintaining data integrity. I ensured high annotation quality by adhering to precise guidelines. • Labeled images with bounding boxes for object detection • Classified and tagged objects in images and videos • Followed detailed project instructions for labeling • Ensured consistency and accuracy in image datasets

2022 - Present

Freelance AI Data Annotation & Evaluation

AppenAudioTranscription

I was involved in transcribing and annotating audio data for AI model training and evaluation tasks. My work included detailed audio transcription, pairing audio with text, and quality assurance of annotated datasets. Projects were conducted remotely using specialized annotation platforms. • Transcribed and annotated audio files for NLP tasks • Paired audio segments with corresponding text • Checked audio dataset quality and formatting • Followed project-specific annotation guidelines

2022 - Present

Freelance AI Data Annotation & Evaluation

Label StudioTextClassification

I performed data annotation and labeling for machine learning projects, focusing on text classification, sentiment tagging, and entity labeling tasks. I was responsible for ensuring the quality and consistency of the labeled text data according to strict guidelines. My work involved both independent labeling and dataset review tasks for accuracy and formatting. • Labeled text data for classification and sentiment analysis • Conducted entity recognition and NER annotation • Ensured compliance with detailed annotation guidelines • Reviewed and cleaned text datasets for consistency

2022 - Present

Education