Tsuyoshi Ushio
Senior Software Engineer at Microsoft
Kirkland, Washington, United States
Summary
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RockstarTsuyoshi Ushio is a Senior Software Engineer based in Kirkland, WA with 13 years of experience building cloud-native backend systems and DevOps tooling. He contributes heavily to major Azure open-source projects—improving Azure Functions runtime, templates, Durable Extension, and WebJobs SDK—and has practical experience integrating Kafka, Application Insights, and Event Grid into serverless workflows. His work on KEDA shows a strong grasp of Kubernetes-based autoscaling and edge cases like orphan pod handling, while his Azure deployments and provisioning scripts demonstrate end-to-end infrastructure fluency. Known for upgrading language workers, refactoring extension configuration systems, and surfacing richer telemetry, he blends pragmatic engineering with attention to observability and scalability.
12 years of coding experience
Github Skills (49)
autoscaling10
api-rest10
kubernetes10
javascript10
azure-application-insights10
back-end-development10
event-grid10
api-design10
restful-api10
azure-webjobs-sdk10
configuration-management10
azure-functions10
kafka10
microsoft-azure10
java10
Programming languages (19)
Github contributions (5)
Azure-Samples/openhack-devops-proctor
May 2018 - Mar 2019
DevOps OpenHack Proctor environment code and provisioning scripts
Role in this project:
Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:24 commits, 33 PRs, 135 pushes in 10 months
Contributions summary:Tsuyoshi's contributions primarily focused on developing the backend API, including implementing downtime calculation logic and uptime reporting features. They added services, methods for checking status, and integrated dependency injection. Additionally, the user worked on the deployment process by adding scripts for Azure Functions, CosmosDB, and related infrastructure. They also modified the existing web application and fixed some minor backend errors.
provisioningdevopsprovisioning-scriptsproctorazure
Azure/azure-functions-host
Jul 2020 - Dec 2022
The host/runtime that powers Azure Functions
Role in this project:Backend Developer
Backend DeveloperContributions:112 reviews, 80 commits, 41 PRs in 2 years 4 months
Contributions summary:Tsuyoshi primarily focused on upgrading and maintaining the JavaWorker within the Azure Functions Host. They upgraded the JavaWorker versions, ensuring compatibility and incorporating the latest features. Additionally, they fixed the SyncTrigger URL for the BuildService and added extensions configuration from host.json to the sync trigger payload, enhancing the functionality and configuration of the service.
hostazure-functionsserverlesspowersruntime
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