# Expedia's Service Telemetry Analyzer

DevFeed: [Expedia's Service Telemetry Analyzer](<https://devfeed.tech/articles/expedia-s-service-telemetry-analyzer-19731.md>)

Original publisher: [Read original article](<https://medium.com/expedia-group-tech/expedias-service-telemetry-analyzer-60f2f96c5351?source=rss----38998a53046f---4>)

Author: Nikos Katirtzis

Published: 2026-04-28T11:01:01Z

Content type: article

Language: en

Sources: [Expedia](<https://devfeed.tech/sources/expedia.md>)

Topics: [telemetry](<https://devfeed.tech/topics/telemetry.md>), [distributed-systems](<https://devfeed.tech/topics/distributed-systems.md>), [Prompt Engineering](<https://devfeed.tech/topics/prompt-engineering.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [API](<https://devfeed.tech/topics/api.md>), [Cloud](<https://devfeed.tech/topics/cloud.md>), [Containers](<https://devfeed.tech/topics/containers.md>), [Orchestration](<https://devfeed.tech/topics/orchestration.md>)

Tags: [ai](<https://devfeed.tech/tags/ai.md>), [api](<https://devfeed.tech/tags/api.md>), [distributed-systems](<https://devfeed.tech/tags/distributed-systems.md>), [generative-ai-tools](<https://devfeed.tech/tags/generative-ai-tools.md>), [metric](<https://devfeed.tech/tags/metric.md>), [observability](<https://devfeed.tech/tags/observability.md>), [prompt-engineering](<https://devfeed.tech/tags/prompt-engineering.md>), [root-cause-analysis](<https://devfeed.tech/tags/root-cause-analysis.md>), [site-reliability-engineer](<https://devfeed.tech/tags/site-reliability-engineer.md>), [software-engineering](<https://devfeed.tech/tags/software-engineering.md>), [telemetry](<https://devfeed.tech/tags/telemetry.md>)

## AI overview

Expedia's Service Telemetry Analyzer (STAR) is an early web-based system for investigating service degradations and outages with service telemetry data and AI models. It uses predefined multi-step diagnostic workflows, domain-specific prompt engineering, and engineering knowledge spanning applications, infrastructure, cloud, containers, orchestration, and distributed systems.

## Source excerpt

Expedia Group Technology -- EngineeringA system that facilitates investigation of service degradations and outages using service telemetry data and AIPhoto by Evangelos Mpikakis on Unsplash. The recent advancements in the artificial intelligence space make us re-evaluate how work is done. From programming, to designing systems, or even operating them in production. While there is considerable focus on automating programming, one area which could undergo transformation is how we monitor and operate our systems and services. A few of us came together and designed Expedia's® Service Telemetry Analyzer (STAR), an early iteration of a system that facilitates investigation of service degradations and outages using service telemetry data and AI models and techniques. Expedia's Service Telemetry Analyzer (STAR) The early product offering includes: Execution of multi-step workflows. Integration of software and systems engineering knowledge, including application and infrastructure, cloud, containerization, and orchestration patterns, into diagnostic workflows for complex distributed systems. Application of domain-specific prompt engineering for metric and root cause analysis. Utilization of advanced off-the-shelf AI models. Implementation of prompt engineering techniques, including role prompting, prompt chaining, and generated knowledge prompting. Design The product offering is a web-based service that provides an application programming interface (API). While AI agents and chatbots are gaining traction, we aimed to start with something a) simple, b) precise (to a certain extent, considering the potential hallucinations of the models), and c) that avoids the additional and currently less understood failure modes of an agent. As this field evolves, we will continue to iterate on the design. Therefore, there is limited context engineering beyond domain-specific prompts; for instance, there is no support for function calling / tool use, short-term and long-term memory, or retri