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現職Golang Backend Engineer
open source愛好者，熱愛遊戲製作
專長為工具開發，後端系統設計


世新大學 Shih Hin University

Golang軟體工程師

張毅瑞

串雲科技有限公司

Golang 雲端工程師

1. Build an IoT backend system for the Amazon Smart Sticky Note Printer using serverless architecture
-20000 active device
-Build high performance system (response<=400ms) using AWS Lambda, DynamoDB , IoT core, Memcached, S3
-Build realtime metrics monitor by Influxdb and Grafana
2. Refactor the existing service with a new architecture, implementing the following changes:
-Integrate clean architecture principles to enhance maintainability and scalability.
-Integrate CodeBuild CI/CD into our development flow, such as deploy tools.
-Optimize database queries by using Memcached  as a cache layer, reducing 30% RCU.
-Import structured logging (zerolog , AWS X-Ray) , to enhance service observability.
-Re-design lambda middleware and framework
3. Write unit testing and integrated testing
4. Design a highly concurrency IoT service and ETL (Extract-Transform-Load) system
-1000+ device online (per device IOPS : 0.17 KB/Sec)
-Handle million data in 30 sec
-Reduce data size and upload time by using Go channel 
5. Write Infrastructure as Code (IaC) to facilitate the management of cloud resources.

1. Planning microservice architecture on kubernetes.
2. Design Restful API using the golang echo framework.
3. Write unit testing and Integration testing
   -  table driven, testify, ginkgo
4. Design infrastructure code with the following features
   - Design gRPC interceptor in go
   - Import structured log library (zerolog)
   - Develop HTTP middleware in Go
5. Familiar with code review flow on gitlab

美商時豪科技股份有限公司

Golang Backend Engineer 

1. Maintain and design gRPC service base on kubernetes
   -  using rancher , helm
2. Design a Code Generation Tool to automatically create domain entity CRUD (Create, Read, Update, Delete) and testing code
3. Design Restful API  and using golang echo framework
4. Possess experience with GraphQL 
5. Possess experience with MySQL / PostgreSQL databases.
6. Maintain the existing payment system

思華科技有限公司

Golang 軟體工程師

1. Develop a Restful API server using Go and C#.
2. Design an IoT system with WebSocket for device control.
3. Manage MySQL/MSSQL database
4. Design a code generation tool to improve development efficiency by automatically creating entity classes, unit testing, and basic CRUD implementation code.
5. Assist in redesigning the architecture with a modern web approach:
   - Introduce containerization (Docker) to reduce cloud resource usage.
   - Separate the front-end and back-end components.

法亞科技整合行銷

Golang 後端工程師

1. Develop an AR/VR application such as HTC Vive, HTC Focus, Facebook Oculus, and Apple AR Kit.
2. Create interactive applications using the Unity.

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