Raghav Bali.

Principal Data Scientist · Delivery Hero · Berlin

I build and improve production ML systems.

My work spans machine learning and AI, with a current focus on recommendation, personalization, and LLMs. I help turn model ideas into systems teams can ship and improve.

Explore my work →About & experience →
LinkedIn ↗·Twitter ↗
Raghav Bali

Work

Explore the work →

Recommendation & personalization

Recommendation systems in production

Understanding customer behavior and architecting end-to-end recommendation systems. My focus includes MLOps improvements that make training, deployment, and iteration more efficient.

Project overview →
Production LLMsEmployeeGPT: knowledge discovery →Technical leadershipAI-assisted data science workflows →

Books, papers & patents

All publications →

Book · 2025

Generative AI with Python and PyTorch — book cover

Generative AI with Python and PyTorch

Second Edition · Co-authored with Joseph Babcock

View book →

Conference paper · RecSys 2023

Delivery Hero Recommendation Dataset

Co-authored research providing a real-world benchmark for recommendation algorithms.

Read paper →

USPTO

Predictive entity scoring for NLP

US11853700B1 · Granted 2023 · Co-inventor

View patent →

Talks & hands-on workshops

Browse talks →

Things I’m building

All projects →

Hardware + software

Nestly

Bringing a camera, Raspberry Pi, and a simple monitoring dashboard together.

Explore Nestly →

macOS presentation tool

Gnocchi

A floating macOS notch widget for presentation prompts, with on-device speech recognition.

Explore Gnocchi →