Shir Hilel

Vonage
Eliminating Hallucinations in LLM-Driven Applications
Shir Hilel

Abstract

Large Language Models (LLMs) enable powerful conversational systems, but they also introduce a key challenge: hallucinations. In real-world applications, this can lead to outputs that are not grounded in system capabilities or user input, reducing reliability and trust.

In this roundtable, we present practical techniques used in production to improve the reliability of LLM-driven systems. By introducing structured reasoning fields, careful response schema design, and hybrid validation that combines LLM reasoning with system-side checks, we guide models to analyze constraints before producing actionable outputs.

These techniques significantly reduced incorrect responses while preserving the model’s ability to correctly handle valid requests. The session shares practical patterns for building more reliable and controllable LLM-powered applications in production environments.

Bio

Shir Hilel is an ML Engineer at Vonage with over 10 years of experience delivering various production-grade solutions, ranging from classic ML to LLM-powered systems, with a strong emphasis on measurable, data-driven outcomes. She holds both a Bachelor’s and a Master’s degree in Information Technology from Bar-Ilan University.

Agenda

08:45

Reception & gathering

09:30

Opening remarks by WiDS TLV ambassadors

09:45

Keynote session: Prof. Michal Rosen Zvi

10:15

Keynote session: Hadas Grossmon Ella

10:45

Poster pitches

10:55

Break

11:10

Lightning talks session

12:45

Lunch & poster session

13:30

Roundtable session & poster session

14:20

Roundtable closing

14:30

Talk by Hila Paz

14:50

Talk by Dr. Moran Mizrahi

15:15

Closing remarks

15:30

End