Eric Mustin
Senior Customer Architect at Elastic
United States
Summary
🤩
Rockstar🎓
Top SchoolEric Mustin is a Senior Customer Architect with a decade of hands-on experience building observability and backend systems across fintech and cloud-native companies. He has progressed from software engineering roles at Datadog and Primary.com to production engineering at Shopify and observability leadership at UBS and Citi, now applying that expertise at Elastic. Eric is an active open-source contributor with notable work on Datadog projects and OpenTelemetry—adding multiline log parsing for AWS Lambda functions, Datadog trace export plumbing, and new integrations like a Lighthouse check—demonstrating deep practical knowledge of telemetry pipelines. He blends backend engineering, test automation, and documentation work, often improving robustness and developer experience through better logging, tests, and API docs. Colleagues value his knack for turning messy edge cases into reliable, test-covered features and for bridging product, ops, and engineering needs. Based in the United States, he brings a pragmatic, instrumentation-first approach to observability at scale.
11 years of coding experience
14 years of employment as a software developer
Penn State University
Github Skills (41)
unit-testing10
debugging10
json10
apim10
hugo10
javascript10
tracer10
pytest10
python10
mysql10
testing10
distributed-tracing10
aws-lambda10
logger10
apm10
Programming languages (16)
Github contributions (5)
DataDog/dd-trace-rb
Mar 2019 - Aug 2021
Datadog's client library for Ruby
Role in this project:
Backend Developer & Test Automation Engineer
Backend Developer & Test Automation EngineerContributions:4 releases, 303 reviews, 430 commits in 2 years 5 months
Contributions summary:Eric primarily contributed to the backend logic and unit testing of the Datadog Tracing Ruby Client. They focused on fixing syntax errors, adding unit tests, and enhancing the debug logging capabilities within the tracer. They also addressed side effects in logger tests and implemented code to handle unpatched integrations, improving the overall robustness and reliability of the tracing client.
datadogrubytracingapmdistributed-tracing
open-telemetry/opentelemetry-ruby
Jun 2020 - Apr 2022
OpenTelemetry Ruby API & SDK, and related gems
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:277 reviews, 57 commits, 39 PRs in 1 year 10 months
Contributions summary:Eric contributed to the OpenTelemetry Ruby project by addressing missing routes in the Sinatra adapter and adding tests. They implemented the addition of tracestate to span data across different parts of the SDK and exporter components. Furthermore, the user integrated a new MySQL2 adapter, creating the foundation for database instrumentation and testing its functionality.
opentelemetryrubytelemetrydistributed-tracingmetrics
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