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Chijun Sha

PROFILE

Chijun Sha

Worked on the awslabs/sagemaker-hyperpod-usage-report repository to enhance infrastructure reliability and deployment stability over a two-month period. Focused on resolving deployment failures by adjusting CloudFormation resource creation order using YAML and AWS CloudFormation, ensuring the ServiceAccountRole was available before LambdaExecutionRole during Lambda deployments. Further improved reliability by converting the Lambda execution role’s policy from a managed policy to an inline policy, addressing IAM propagation delays and preventing role assumption errors. These targeted bug fixes reduced operational risk in CI/CD pipelines and stabilized usage-reporting workflows, demonstrating proficiency in AWS, Infrastructure as Code, and IAM role management for cloud environments.

Overall Statistics

Feature vs Bugs

0%Features

Repository Contributions

2Total
Bugs
2
Commits
2
Features
0
Lines of code
47,842
Activity Months2

Work History

January 2026

1 Commits

Jan 1, 2026

January 2026 monthly summary for the awslabs/sagemaker-hyperpod-usage-report repository. Focused on reliability improvements to AWS Lambda IAM role attachment and stabilization of usage-reporting workflows.

December 2025

1 Commits

Dec 1, 2025

December 2025 monthly summary for awslabs/sagemaker-hyperpod-usage-report focused on reliability improvement through CloudFormation resource creation order fix. Implemented a dependency adjustment to ensure ServiceAccountRole is created before LambdaExecutionRole, improving resource availability during Lambda deployments and reducing deployment failures. The change was implemented via a CloudFormation DependsOn configuration and committed as 4d71ba1d2393896797474b8b6bebd155ea22be4a with descriptive messaging. This work enhances infrastructure stability for SageMaker HyperPod usage reporting and reduces operational risk in CI/CD pipelines.

Activity

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Quality Metrics

Correctness100.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

YAML

Technical Skills

AWSCloudFormationIAMInfrastructure as Code

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

awslabs/sagemaker-hyperpod-usage-report

Dec 2025 Jan 2026
2 Months active

Languages Used

YAML

Technical Skills

AWSCloudFormationInfrastructure as CodeIAM