Toshinori Sugita
Staff Software Engineer at LegalOn Technologies
Tokyo, Japan
Summary
👤
Senior🎓
Top SchoolToshinori Sugita is a Staff Software Engineer and platform leader in Tokyo with 11 years of experience building large-scale, cloud-native systems using Go, Kubernetes, serverless patterns, and GitOps. At LegalOn Technologies he leads a multi-person platform effort that delivered protobuf governance, a mono-repo CI, and an Argo CD–based GitOps CD pipeline while shaping Go and developer workflows. His background spans SRE and platform roles at Mercari, Ubie, and others, where he drove observability, security improvements (Workload Identity, network policies), and disaster-recovery practices across GCP and Kubernetes fleets. He contributes to notable OSS projects such as the Serverless Framework and AWS Lambda .NET tooling—often focusing on test automation and developer scaffolding—and is known for turning operational pain points into developer-facing infra abstractions. Outside work he’s an unobtrusive sauna and cat enthusiast, reflecting a pragmatic, human-centered approach to engineering.
11 years of coding experience
7 years of employment as a software developer
Bachelor of Arts, Social Sciences, Bachelor of Arts, Social Sciences at 一橋大学Master of Science - MS, Computing Systems, Computer Science, Master of Science - MS, Computing Systems, Computer Science at Georgia Institute of Technology
English, Japanese
Stackoverflow
1,884reputation
80kreached
4answers
3questions
aws-lambda
top-5%
amazon-web-services
top-5%
kubernetes
top-5%
go
top-5%
Github Skills (27)
json10
testing10
net10
aws-lambda10
dotnet10
google-cloud-functions10
asp-net10
go10
dotnet-core10
serverless10
csharp10
kubernetes9
amazon-web-services9
aws9
api-gateway9
Programming languages (15)
Github contributions (5)
serverless/serverless
Oct 2018 - Jan 2019
⚡ Serverless Framework – Effortlessly build apps that auto-scale, incur zero costs when idle, and require minimal maintenance using AWS Lambda and other managed cloud services.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:18 commits, 4 PRs, 5 comments in 3 months
Contributions summary:Toshinori contributed to the Serverless Framework by adding Go-based templates. Their work includes creating scaffolding for AWS Lambda functions using Go modules, including hello and world examples. They integrated the `aws-lambda-go` library and implemented basic API Gateway proxy response handlers. Additionally, they addressed a bug in the template naming and added a new template for Google Cloud Functions using Go.
aws-lambdaserverlessiot-applicationsawsgoogle-functions
aws/aws-lambda-dotnet
Dec 2017 - Dec 2017
Libraries, samples and tools to help .NET Core developers develop AWS Lambda functions.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:12 commits, 4 PRs, 2 comments in 7 days
Contributions summary:Toshinori primarily focused on implementing and maintaining automated tests for various AWS Lambda events within the .NET environment. The commits involve creating and updating JSON files to simulate events from services like S3, Cognito, Config, SNS, and API Gateway. The changes include assertions to validate the behavior of the Lambda functions triggered by these events. This suggests a focus on ensuring the reliability and correctness of the AWS Lambda functions.
dotnetlambda-functionsaws-lambdaserverlessnet-core
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