Nikolaos Krystallis
Business Analyst at Aambience Services
Attica, Greece
Summary
👤
Senior🎓
Top SchoolNikolaos Krystallis is a data-driven Business Analyst with nine years of experience applying mathematical and operations research principles to financial analytics, workforce planning, and real-time operations. He combines a strong technical toolkit—Python, SQL, Power BI, NLP and data automation—with hands-on experience in budgeting, forecasting and NPL due diligence across banking and contact-center environments. Currently leading financial data automation at Aambience Services, he has a track record of speeding reporting cycles and translating large datasets into actionable business decisions. His background includes real-time SLA management and workforce optimization at Webhelp, plus a PhD-focused, AI-oriented research profile that informs practical ML and NLP solutions for financial insights. Known for bridging rigorous academic methods with pragmatic operational improvements, he often uncovers non-obvious patterns that drive measurable efficiency gains.
9 years of coding experience
Bachelor's degree, Bachelor's degree at University of PatrasFirst High School of New PsychikoMaster of Science (MSc), Master of Science (MSc) at Technical University of Crete / Πολυτεχνείο ΚρήτηςDoctor of Philosophy - PhD, Doctor of Philosophy - PhD at Hellenic Army Academy
English, Greek, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
lexicon9
sentiment-classification9
twitter9
sentiment8
sentiment-analysis8
cuda7
nltk7
pytorch6
nlp6
Programming languages (4)
Github contributions (5)
NKryst/Greek-Sentiment-Analysis
Dec 2019 - Nov 2022
Using Greek Sentiment Lexicon for Sentiment Analysis on Greek Tweets
Contributions:86 commits, 10 PRs, 87 pushes in 2 years 11 months
nlpnltksentimentsentiment-analysislexicon
NKryst/Greek-Bert
Jul 2020 - May 2022
Using Greek edition of Google Bert for Sentiment Analysis.
Contributions:56 commits, 2 PRs, 59 pushes in 1 year 9 months
cudagoogle-bertgreek-languagepython3pytorch
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