Data Annotation Consultant & Pipeline Engineer (Freelance) | Fiverr (Remote)
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ClassificationDesigned and maintained scalable data preprocessing pipelines to structure large raw datasets into clean, annotation-ready formats for multiple clients. Implemented comprehensive data quality checks to maintain high label fidelity by enforcing schema validation, deduplication, and row-count reconciliation across annotation datasets. Built annotation progress dashboards and trackers to monitor labeling throughput, QA pass rates, and dataset completeness KPIs. • Preprocessed 5M+ monthly records into structured formats for annotation • Performed schema validation, deduplication, and reconciliation to eliminate duplicate samples • Monitored labeling throughput and QA pass rates via dashboards and trackers • Authored annotation guidelines, labeling schemas, and reporting templates to standardize results