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Özgür Öztürk

Özgür Öztürk

LLM Eval & Text Generation Specialist | TR & EN & ES & RU

Turkey flagIstanbul, Turkey
$40.00/hrIntermediateLabel StudioLighttagLabelbox

Key Skills

Software

Label StudioLabel Studio
LightTagLightTag
LabelboxLabelbox

Top Subject Matter

No subject matter listed

Top Data Types

TextText

Top Task Types

Prompt Response Writing SFT
Question Answering
Text Generation
Text Summarization
Translation Localization

Freelancer Overview

I bring a unique blend of linguistic expertise and technical competency to AI training data tasks, particularly in the evaluation and refinement of large language model (LLM) outputs. As a certified translator fluent in Turkish, English, Spanish, and Russian, I have a deep understanding of semantic nuance, syntactic structure, and contextual variation across languages. This enables me to critically assess multilingual LLM responses for accuracy, coherence, tone, and cultural relevance—key factors in reducing hallucinations and improving user experience in generative AI systems. My technical toolkit includes Python (Pandas, NumPy), SQL, and data visualization tools like Tableau and Power BI, which I've used in analytical projects involving text data, campaign performance metrics, and prompt evaluation workflows. I’ve also applied structured QA methodologies and A/B testing to assess chatbot and text generation output in SaaS and customer support environments. With strong attention to linguistic detail and a working knowledge of machine learning fundamentals, I’m well-positioned to contribute to LLM evaluation, prompt tuning, and data quality audits at scale.

IntermediateEnglishRussianSpanishTurkish

Labeling Experience

Labelbox

Video Action Recognition Annotation for Human Behavior Detection

LabelboxVideoBounding BoxPolygon
Worked on a large-scale video annotation project involving the labeling of human actions and object interactions across surveillance-style video datasets. Tasks included drawing bounding boxes and polygons around people and objects, tagging actions (e.g., walking, sitting, waving), and using object tracking tools to maintain label consistency across frames. I used CVAT’s interpolation feature and Labelbox’s collaborative QA system to ensure efficiency. Maintained an annotation accuracy above 98% according to internal QA metrics. The dataset contributed to training models for a real-time behavior recognition system used in a smart city pilot.

Worked on a large-scale video annotation project involving the labeling of human actions and object interactions across surveillance-style video datasets. Tasks included drawing bounding boxes and polygons around people and objects, tagging actions (e.g., walking, sitting, waving), and using object tracking tools to maintain label consistency across frames. I used CVAT’s interpolation feature and Labelbox’s collaborative QA system to ensure efficiency. Maintained an annotation accuracy above 98% according to internal QA metrics. The dataset contributed to training models for a real-time behavior recognition system used in a smart city pilot.

2024 - 2024
LightTag

Audio Data Labeling Specialist

LighttagAudioEmotion Recognition
Labeled short audio clips in Turkish and English for emotional tone, speaker turns, and intent. Helped improve the accuracy of speech-based AI by providing human judgment in edge cases and ambiguous inputs.

Labeled short audio clips in Turkish and English for emotional tone, speaker turns, and intent. Helped improve the accuracy of speech-based AI by providing human judgment in edge cases and ambiguous inputs.

2024 - 2024
Label Studio

Multilingual LLM Response Evaluation and Prompt QA

Label StudioTextText Generation
Evaluated multilingual LLM-generated responses (Turkish, English, Spanish, Russian) for semantic accuracy, cultural relevance, fluency, and contextual appropriateness. Used structured rating systems to assess hallucinations, tone consistency, and factual grounding across customer service and general knowledge prompts. Conducted manual annotations for NER tasks and participated in A/B testing of prompt variations to enhance generative reliability. Familiar with post-editing machine translation outputs and refining data quality for training purposes.

Evaluated multilingual LLM-generated responses (Turkish, English, Spanish, Russian) for semantic accuracy, cultural relevance, fluency, and contextual appropriateness. Used structured rating systems to assess hallucinations, tone consistency, and factual grounding across customer service and general knowledge prompts. Conducted manual annotations for NER tasks and participated in A/B testing of prompt variations to enhance generative reliability. Familiar with post-editing machine translation outputs and refining data quality for training purposes.

2024 - 2024

Education

B

Boğaziçi University

Bachelor's Degree, Translation And Interpreting Studies

Bachelor's Degree
2017 - 2017

Work History

C

Contact Attornaid

Customer Success Manager

Istanbul
2024 - Present
S

Schema Plus (Shopify App)

Customer Relationship Manager

New York
2025