Harold Dost
Staff SRE Lead - Build Services at Criteo
Paris, Ile-de-France
Summary
🤩
Rockstar🎓
Top SchoolHarold Dost is a Staff SRE Lead based in Paris with 12 years of experience building observability-first platforms and developer-facing build services at Criteo. He blends hands-on systems work—benchmarking and migrating core services, refactoring infrastructure code, and reducing Prometheus footprint by over 30%—with cross-team leadership as incident commander and SLA advocate. A pragmatic operator and amateur Rust enthusiast, he has contributed to OpenTelemetry's Rust implementation, bringing production-savvy insights to tracing and metrics integrations. His background spans cloud automation, CI/CD for serverless workloads, and long experience with enterprise middleware, giving him a rare mix of low-level systems curiosity and large-scale reliability practice. Colleagues rely on him to turn observability standards and runbooks into measurable SLIs and actionable playbooks that improve both developer experience and operational resilience.
12 years of coding experience
10 years of employment as a software developer
Bachelor of Science (BS) Computer Science, Bachelor of Science (BS) Computer Science at Kettering University
English, Spanish, French
Stackoverflow
883reputation
137kreached
24answers
4questions
Github Skills (29)
tracer10
jira10
python10
testing10
zipkin10
opentelemetry10
rust10
trace10
metric10
api-design9
environment-variables9
prometheus9
documentation9
jaeger9
type-checking8
Programming languages (18)
Github contributions (5)
open-telemetry/opentelemetry-rust
Feb 2022 - Sep 2022
The Rust OpenTelemetry implementation
Role in this project:
Back-end Developer
Back-end DeveloperContributions:207 reviews, 8 commits, 64 PRs in 7 months
Contributions summary:Harold primarily contributed to the OpenTelemetry Rust implementation, focusing on adding and configuring features related to tracing and metrics. Their work included adding support for environment variables to configure Zipkin exporters, removing deprecated calls in the Prometheus exporter, and deprecating the ValueRecorder metric in favor of Histograms. Additionally, they integrated timeout configurations for the Jaeger exporter and updated sampling documentation. The user demonstrated a strong understanding of the OpenTelemetry specification and its implementation details within this Rust codebase.
zipkinapirusttracinglogging
pycontribs/jira
Nov 2017 - Oct 2018
Python Jira library. Development chat available on https://matrix.to/#/#pycontribs:matrix.org
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:36 commits, 87 PRs, 37 pushes in 11 months
Contributions summary:Harold contributed to improving the project's continuous integration testing, updating contribution guidelines, and adding a testing section to the documentation. They implemented cookie-based authentication and added a test for the delete_component feature. The user also updated the README and updated the Travis badge and added type hints for the jira resources.
python3-onlypythonchatjiramatrix
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