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Bohdan Danoi

@bohdandanoi1

Data Scientist at Data Factory, building cybersecurity alert models and retrieval systems that improved critical-alert recall to 93%.

Ukraine

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What I'm looking for

I'm looking to join a remote team.

At Data Factory, I developed a human-in-the-loop cybersecurity alert system for classification, procedure retrieval, and evidence-backed summaries. My LightGBM escalation model reached 93% recall for critical escalations at 68% precision, and I fine-tuned a Transformer that improved macro F1 from 0.71 to 0.79.

I also built a hybrid retrieval pipeline across runbooks and investigation records, raising Recall@5 from 0.72 to 0.86. Prompt and retrieval improvements reduced unsupported assistant claims from 13.6% to 4.8%, while I helped with a pilot that reduced median alert triage time from 11.2 to 8.0 minutes.

At A-listware, I developed a hybrid recommendation system for an online learning platform. It improved offline NDCG@10 from 0.118 to 0.139, and I helped increase recommendation CTR from 7.8% to 8.6% during a controlled experiment.

Experience

Work history, roles, and key accomplishments

Data Scientist

Data Factory

Jun 2025 - Oct 2026 (1 year 4 months)

Developed a human-in-the-loop system for classifying cybersecurity alerts, retrieving investigation procedures, and generating evidence-backed summaries for security analysts. Built ML models, retrieval pipelines, and API endpoints, improving alert triage efficiency.

Python SQL Pandas scikit learn LightGBM PyTorch Transformers Sentence Transformers Faiss BM25 PostgreSQL fastAPI Docker MLFlow Grafana

Data Scientist

A-listware

Aug 2023 - May 2025 (1 year 9 months)

Built a hybrid recommendation system for an online learning platform, combining collaborative filtering, semantic course representations, and boosted-tree ranking. Improved recommendation quality and user engagement metrics.