Daniel O.

Key Skills

Software

Other

Don't disclose

Top Subject Matter

AI data annotation for NLP and speech model training

AI training data preparation (audio + text)

Speech recognition dataset preparation

Top Data Types

Text

Image

Audio

Top Task Types

Classification

Audio Recording

Data Collection

Transcription

Prompt + Response Writing (SFT)

Text Summarization

Question Answering

Text Generation

Object Detection

Evaluation/Rating

Freelancer Overview

I am a detail oriented data annotation specialist with extensive experience supporting AI and machine learning projects through high quality labeled datasets. My background includes processing speech samples, text classification, and linguistic data processing on freelance platforms like Fiverr and Upwork. I offer specialized skills in both text and audio transcription, including cleaning and production for speech recognition training. With a foundation in science and formal training in NLP and AI datasets, I focus on delivering the accuracy and consistency required for complex machine learning models.

Labeling Experience

AI Data Contributor (Fiverr, Remote)

OtherTextClassification

Annotated and labeled text and audio datasets for AI model training with an emphasis on accuracy and consistency. Processed speech samples and structured data to support downstream machine learning workflows. Performed thorough checks to maintain dataset quality at scale. • Labeled multilingual text content for NLP use • Tagged and cleaned samples for model readiness • Structured audio and transcription-related training inputs • Ensured consistent formatting across large datasets

2022 - 2025

Freelance Data Annotator (Upwork, Remote)

OtherAudioClassification

Converted raw audio and text into structured, labeled datasets for AI projects. Conducted tagging, cleaning, and classification to prepare high-quality training data. Supported multilingual data preparation for NLP tasks with focus on correct labels and usability. • Performed data cleaning and labeling pipelines for AI • Applied tagging and classification for training sets • Worked with multilingual inputs for NLP model development • Prepared consistent structured datasets from raw sources

2020 - 2025

Audio Recording & Production Specialist (AceVolumes Company)

OtherAudioAudio Recording

Edited and prepared audio datasets for AI and speech recognition use. Improved clarity and formatting of training samples to ensure they were suitable for model ingestion. Assisted in dataset validation and quality checks to reduce errors before training. • Audio preprocessing for speech recognition datasets • Improved formatting of training audio samples • Supported validation and quality assurance steps • Ensured readiness of labeled/structured audio inputs

2019 - 2022

Data & Language Assistant (Remote)

OtherTextData Collection

Supported structured language data collection for educational and AI use. Assisted in organizing text and speech materials to build training datasets. Helped ensure collected data was prepared for subsequent annotation and training workflows. • Collected and organized language materials • Assisted with structuring text and speech resources • Supported preparation of training dataset inputs • Contributed to dataset readiness for AI use

2018 - 2019

Education

Work History