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Afrizal Zein

Afrizal Zein

AI Trainer

Indonesia flagPurwokerto, Indonesia
$20.00/hrIntermediateOtherData Annotation Tech

Key Skills

Software

Other
Data Annotation TechData Annotation Tech

Top Subject Matter

Indonesian LLM Optimization
Adversarial Prompting and Stress-Testing
Linguistic Translation and Localization

Top Data Types

TextText

Top Task Types

Text GenerationText Generation
Evaluation/RatingEvaluation/Rating
ClassificationClassification
RLHFRLHF

Freelancer Overview

Highly analytical AI Trainer with a specialized focus on auditing multi-step reasoning and linguistic calibration. Expert in identifying semantic hallucinations and executing adversarial prompting to stress-test model robustness, ensuring strict instructional adherence and system reliability through rigorous technical feedback. Distinguished by a background in English Literature and deep expertise in Indonesian sociolinguistic norms, enabling the engineering of high-fidelity training data. Proven ability to optimized AI outputs by refining complex syntactical structures and cultural nuances, bridging the gap between technical logic and native-level context awareness.

IntermediateEnglishIndonesianJavanese

Labeling Experience

AI Trainer | Productive Playhouse

OtherTextText Generation
Engineered high-fidelity training data by leveraging linguistic expertise to calibrate Indonesian model outputs. Refined syntactical structures and register shifts to optimize the model’s ability to generate context-aware, linguistically precise responses. Enhanced LLM performance in adhering to complex sociolinguistic norms and native cultural nuances. • Designed culturally relevant prompts and responses in Indonesian. • Reviewed and corrected model outputs for language authenticity. • Ensured compliance with sociolinguistic and formatting norms. • Delivered annotated datasets to support model fine-tuning.

Engineered high-fidelity training data by leveraging linguistic expertise to calibrate Indonesian model outputs. Refined syntactical structures and register shifts to optimize the model’s ability to generate context-aware, linguistically precise responses. Enhanced LLM performance in adhering to complex sociolinguistic norms and native cultural nuances. • Designed culturally relevant prompts and responses in Indonesian. • Reviewed and corrected model outputs for language authenticity. • Ensured compliance with sociolinguistic and formatting norms. • Delivered annotated datasets to support model fine-tuning.

2025 - Present

Data Annotator | DataAnnotation

OtherText
Audited reasoning traces and multi-step workflows to ensure logical integrity and instructional adherence of complex AI processes. Identified recurring failure patterns and edge cases to mitigate semantic hallucinations and enhance system reliability. Executed adversarial prompting to systematically evaluate model robustness and formatting precision. • Conducted comprehensive review of AI-generated outputs for factual accuracy and structure. • Developed structured feedback reports for model enhancement. • Collaborated on improving guidelines for AI output evaluation. • Utilized prompting strategies to identify vulnerabilities in model responses.

Audited reasoning traces and multi-step workflows to ensure logical integrity and instructional adherence of complex AI processes. Identified recurring failure patterns and edge cases to mitigate semantic hallucinations and enhance system reliability. Executed adversarial prompting to systematically evaluate model robustness and formatting precision. • Conducted comprehensive review of AI-generated outputs for factual accuracy and structure. • Developed structured feedback reports for model enhancement. • Collaborated on improving guidelines for AI output evaluation. • Utilized prompting strategies to identify vulnerabilities in model responses.

2025 - Present

Education

J

Jenderal Soedirman University

Bachelor of Arts, English Literature

Bachelor of Arts
2015 - 2019

Work History

P

PT Surya Madistrindo

Operational Management Talent

Purwokerto
2020 - 2025