Projects and Technical Practice

Electronic-Signature API

At Sinyi Realty, I independently handled a production electronic-signature API from requirements analysis and system planning through design, development, deployment, and post-release maintenance.

• Used .NET 6, Dapper, AutoMapper, FluentValidation, and MySQL.
• Used Spire.Doc and Spire.PDF for electronic signatures, document generation, Word-to-PDF conversion, PDF processing, and file downloads.
• Wrote MSTest unit tests.
• Created Postman API automation scripts executed daily through Azure Pipelines.
• Maintained API documentation with Swagger and ReDoc.
• Ran pre-release load testing with k6.
• Worked with existing Kubernetes and Cloud Run environments for production deployment.

Multilingual and Time-Zone Features

At Meco Technology, I independently completed multilingual and time-zone conversion features.

• Integrated .resx resources, database translation data, and frontend i18n.
• Displayed dates and times according to the user’s time zone.
• Applied time-zone conversion at API boundaries.
• Stored data using a consistent database time zone.

EF Core Query Improvement

At Techno Medica, I independently revised an existing EF Core query.

Under the same query conditions, environment, and data volume, execution time was reduced from approximately 180 seconds to 7 seconds.

Personal Lab and GitOps

My personal lab uses:

• Docker and Docker Compose
• Kubernetes Deployments, Services, ConfigMaps, Secrets, and probes
• Helm
• Argo CD
• Harbor
• Gateway API and HTTPRoute
• cert-manager Certificate
• GitOps and CI/CD
• Rollouts and deployment troubleshooting

These are personal lab activities, not production experience.