Open to opportunities

Даниил Петрович

@0005361

Message

I build production ML and data systems that turn customer feedback and experiments into decisions.

Poland

Message

What I'm looking for

I'm looking for remote opportunities where I can build production ML, LLM, experimentation, and data infrastructure systems that improve real products at scale.

At X5 Tech, I built an end-to-end customer feedback classification pipeline that processes 1M+ requests every 24 hours in under 10 minutes. I combined rule-based logic and LLMs to enable automated feedback analysis at scale and deployed an issue-alerting pilot across 100+ retail stores.

Previously at Yandex, I worked on Alice product experiences, including adaptive volume control for Yandex TVs. I designed and analyzed five large-scale A/B tests covering roughly 1M devices each and developed a binary user-detection model that reached 84% offline accuracy.

I also built Python backend functionality for language-model integration and log analysis workflows for quality monitoring and failure detection.

My work spans Python, SQL, ML, experimentation, ETL, and analytical infrastructure. I co-authored research on evaluating self-supervised embeddings with persistent homology, enabling unsupervised model and hyperparameter selection.

Experience

Work history, roles, and key accomplishments

Current

Data Scientist

Current

X5 Tech

Jun 2025 - Present (1 year 2 months)

Built an end-to-end customer feedback classification pipeline processing 1M+ requests daily, and developed a hybrid rule-based + LLM classification system achieving near-100% accuracy. Designed Airflow ETL workflows and analytical data marts in ClickHouse and PostgreSQL, and built Grafana dashboards for operational analytics.