Vitalii Pavliuk

About

Vitalii Pavliuk (Ukrainian: Віталій Павлюк) is a Ukrainian software engineer, AI practitioner, researcher and speaker. He is a Senior Backend Engineer at Preply and a PhD candidate in Computer Science at the National University of Water and Environmental Engineering, with a master's degree in Computer Science from Igor Sikorsky Kyiv Polytechnic Institute.

His work sits between backend engineering and applied AI: high-load systems and API design on one side, multi-stage LLM pipelines, evaluation and automation on the other. He publishes peer-reviewed research on generative AI and labour-market intelligence, teaches Python, and speaks at engineering conferences.

Featured work

Production LLM pipelines running on local models, a cloud bill cut by 90%, an AI assistant deliberately built without write access to the source of truth.

Research

PhD research on generative AI, decision science and labour-market intelligence — five peer-reviewed papers so far, in the International Journal of Computing, Modeling, Control and Information Technologies and the NUWEE Bulletin.

Speaking

I talk about what actually breaks when a language model leaves the demo and lands in production: hallucination risk, evaluation, and the cost of inference.

Writing

Notes on backend engineering, LLM systems and automation — mostly short-form, mostly in my Telegram channel.

Career and education

Beyond code

Follow my work

Most of what I learn and build I share in my Telegram channel.

“If you always do what you've always done, you'll always get what you've always got.”

— Henry Ford

Contact

Email is the most reliable way to reach me. I read everything, and I answer anything concrete.