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Nikos VasilopoulosNV
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Nikos Vasilopoulos

@nikosvasilopoulos

NLP engineer and computational linguist evaluating production ASR at Profile Software and building transformer classifiers and RAG chatbots.

Greece
Message

At Profile Software, I evaluated AI-generated Greek speech-to-text output for accuracy, fluency, and grammatical correctness. I identified recurring morphology and named-entity errors and performed linguistic quality checks on datasets used to train and validate ASR systems.

I built a sentiment analysis project that fine-tuned and compared BERT-base and DistilBERT on the IMDb 50K dataset. BERT-base achieved 93.61% accuracy and 93.66% F1, while DistilBERT achieved 93.10% accuracy and 93.09% F1.

I also designed and implemented a task-oriented conversational AI system using Rasa Open Source. It includes intent classification, entity extraction, slot filling, dialog policies, REST API integrations, and fallback handling.

My MSc in Language Technology (NLP) at the National & Kapodistrian University of Athens focuses on NLP, computational linguistics, machine learning foundations, transformers, and speech and text processing. My background in Greek language and literature informs how I approach linguistic precision in applied machine learning.

Experience

Work history, roles, and key accomplishments

SE

Language Instructor (Greek Language & Literature)

Self Employed

Apr 2022 - Jun 2023 (1 year 2 months)

Delivered 1:1 instruction on syntax, grammar, and text comprehension. Translated abstract linguistic concepts into clear, learner-oriented explanations.

Education

Degrees, certifications, and relevant coursework

NA

National and Kapodistrian University of Athens

MSc, Language Technology (NLP)

2024 -

Pursuing an MSc in Language Technology with a focus on NLP, computational linguistics, and machine learning.

CO

Codecademy

Apply Natural Language Processing with Python, Natural Language Processing

2024 - 2024

Completed a course on applying natural language processing with Python.

CO

Codecademy

Learn Intermediate Python 3 Course, Python

2023 - 2023

Completed an intermediate Python 3 course.

UP

University of the Peloponnese

MA, Modern Greek Language and Literature

2021 - 2023

Earned an MA in Modern Greek Language and Literature with coursework in corpus linguistics and lexicography.

UD

Udemy

Natural Language Processing Bootcamp in Python, Natural Language Processing

2023 - 2023

Completed a natural language processing bootcamp in Python.

UP

University of the Peloponnese

BA, Greek Language and Literature

2014 - 2021

Earned a BA in Greek Language and Literature with coursework in syntax, semantics, and morphology.

Tech stack

Software and tools used professionally

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