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D

Dionysis Mitrousis

LLM Evaluation and Data Labeling Lead

Greece flagAthens, Greece
$20.00/hrExpertMercorAppen

Key Skills

Software

MercorMercor
AppenAppen

Top Subject Matter

LLM Evaluation
Nlp Domain Expertise
AI Agents

Top Data Types

TextText
DocumentDocument
ImageImage

Top Task Types

Text GenerationText Generation
Computer Programming/CodingComputer Programming/Coding
Evaluation/RatingEvaluation/Rating
ClassificationClassification

Freelancer Overview

LLM Evaluation and Data Labeling Lead. Brings 12+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Internal and Proprietary Tooling. Education includes Bachelor of Science, National Technical University of Athens (2015). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

ExpertEnglish

Labeling Experience

LLM Evaluation and Data Labeling Lead

Text
Oversaw benchmarking and evaluation of multiple large language models for optimization of performance and reasoning. Designed and implemented prompt engineering frameworks and evaluation loops to improve consistency and reliability of LLM outputs. Led efforts to enhance data labeling protocols for hallucination tracking and metric evaluation. • Evaluated LLM outputs across structured and unstructured datasets. • Designed prompt engineering processes for improved label quality. • Built observability and evaluation systems to monitor labeling success and hallucination rates. • Mentored team on LLM evaluation and production readiness best practices.

Oversaw benchmarking and evaluation of multiple large language models for optimization of performance and reasoning. Designed and implemented prompt engineering frameworks and evaluation loops to improve consistency and reliability of LLM outputs. Led efforts to enhance data labeling protocols for hallucination tracking and metric evaluation. • Evaluated LLM outputs across structured and unstructured datasets. • Designed prompt engineering processes for improved label quality. • Built observability and evaluation systems to monitor labeling success and hallucination rates. • Mentored team on LLM evaluation and production readiness best practices.

2023 - Present

Education

N

National Technical University of Athens

Bachelor of Science, Computer Science

Bachelor of Science
2011 - 2015

Work History

A

Accenture

Senior Software Engineer (AI/ML)

Athens
2023 - Present
E

Entersoft

Software Engineer (Full-Stack / AI)

Athens
2020 - 2023