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, Mathematics, Bachelor's degree, Mathematics at University of PatrasDoctor of Philosophy, NLP, Doctor of Philosophy, NLP at Hellenic Army AcademyPsychiko B.C.Master of Science (MSc), Operational Research and Analysis, Master of Science (MSc), Operational Research and Analysis at Technical University of CreteApplied Mathematics, Applied Mathematics at First High School of New Psychiko
English, Greek, French
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (9)
sentiment10
twitter9
sentiment-analysis9
bert7
cuda7
pytorch6
headlines5
newsapi4
r-package3
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
sentimentsentiment-analysis
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
bertsentiment-analysiscudagoogle-bertgreek-language
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