Nicolas A.

Key Skills

Software

Other

Top Subject Matter

AI training data preparation

quality assurance

dataset enrichment

Top Data Types

Text

Top Task Types

Classification

Fine-tuning

Freelancer Overview

Data Annotator | Aligner. Brings 5+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. Education includes Bachelor’s Degree, Victor College (2023). AI-training focus includes data types such as Text and labeling workflows including Evaluation, Rating, and Classification.

Labeling Experience

Data Annotator | Outlier

OtherTextFine-tuning

Evaluated AI-generated content for quality, relevance, and accuracy according to task specifications. Labeled text and data to support training and fine-tuning of machine learning models. Maintained strong performance metrics and high task completion rates while providing actionable feedback to improve annotation processes. • Assessed content against relevance and accuracy criteria • Produced labels required for model learning workflows • Monitored throughput and quality to sustain metrics • Supplied feedback to refine future annotation guidelines

2023 - Present

Data Annotator | Aligner

OtherText

Annotated and reviewed datasets to improve AI model performance and ensure outputs met project requirements. Performed quality checks for labeling accuracy and consistency across tasks. Followed detailed project guidelines while meeting productivity targets for reliable dataset enrichment. • Validated labeled data for discrepancies and corrected identified issues • Ensured consistent adherence to task-specific rules • Supported dataset quality improvements for downstream model training • Managed task execution to maintain accuracy under time constraints

2023 - Present

Freelance Data Annotator | Upwork

OtherTextClassification

Completed freelance annotation and data-labeling projects for multiple clients with a focus on timely, high-quality delivery. Managed project timelines and communicated effectively to ensure alignment with client expectations. Conducted data verification and quality assurance reviews to improve dataset reliability. • Organized and documented annotation workflows for repeatability • Performed labeling according to client specifications • Reviewed and verified data to reduce errors • Maintained professionalism and client satisfaction through clear communication

2022 - 2023

Education

Work History