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4-6 years
6-10 years
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Offline
Backend Developer @InSynerger Technology Co., Ltd.2018 ~ 2021
・
Senior Backend Developer
Within one month
HsiangHao Kang Senior Backend Developer 城市，TW [email protected] Taiwan University of Science and Technology （MS）Information management & Computer Vision Lab, Sep 2012 ~ July 2014 National Kaohsiung University of Applied Sciences （BS）Electronic Engineering, Sep 2008 ~ Jul 2012 Skill Web Application: Java/J2EE, Spring Boot, Spring5 SQL: MySQL, PostgreSQL, MongoDB MessageQueue : RabbitMQ Others : Docker, Jenkins, JUnit5, Spring Batch, Microservices, JMeter TOEIC Listening & Reading Test ( Sept, Listening: 415 , Reading: 325 Experience Rakuten Group, Inc. Backend Developer, July 2021 ~Present Develop and maintain Item and shipment APIs (Item/Product/Inventory/Category/ImageResources
Full-time / Not interested in working remotely
4-6 years
National Taiwan University of Science and Technology
・
Information management, Computer Vision Lab
氣候變遷與永續發展諮詢服務 資深顧問 @勤業眾信風險管理諮詢股份有限公司2021 ~ 2024
・
品牌宣傳及媒體公關人員、 行銷企劃人員、活動企劃人員、傳播媒體企劃人員
Within one month
Employed
Full-time / Interested in working remotely
4-6 years
國立台灣科技大學 National Taiwan University of Science and Technology
・
企業管理所
Project Manager @Calyx2022 ~ Present
・
project manager
More than one year
使用X光、移動式X光、透視攝影、CT、MRI和血管攝影等方式的經驗 - 能夠識別假影並改善影像品質 學歷 國立陽明大學, 學士學位, 生物醫學影像暨放射科學系, 2010 ~ 2014 技能 語言 : 中文 – 母語 英文 – 流利 台灣放射師執照 TOEIC 740/990 TOEIC 說130 寫 140 全民英檢 中高級
Employed
Full-time / Interested in working remotely
4-6 years
國立陽明大學
・
生物醫學影像暨放射科學系4-6 years
世新大學
・
公共關係暨廣告學系Unemployed
Full-time / Interested in working remotely
4-6 years
國立台灣科技大學
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Definition of Reputation Credits
Technical Skills
Specialized knowledge and expertise within the profession (e.g. familiar with SEO and use of related tools).
Problem-Solving
Ability to identify, analyze, and prepare solutions to problems.
Adaptability
Ability to navigate unexpected situations; and keep up with shifting priorities, projects, clients, and technology.
Communication
Ability to convey information effectively and is willing to give and receive feedback.
Time Management
Ability to prioritize tasks based on importance; and have them completed within the assigned timeline.
Teamwork
Ability to work cooperatively, communicate effectively, and anticipate each other's demands, resulting in coordinated collective action.
Leadership
Ability to coach, guide, and inspire a team to achieve a shared goal or outcome effectively.
Professional Background
Current status
Job Search Progress
Professions
Back-end Engineer
Fields of Employment
Software
Work experience
4-6 years
Management
Skills
Languages
English
・
Fluent
Japanese
・
Beginner
Job search preferences
Positions
Senior Backend Developer
Job types
Full-time
Locations
台灣台北
Remote
Not interested in working remotely
Freelance
Educations
School
National Taiwan University of Science and Technology
Major
Information management, Computer Vision Lab
Education
Taiwan University of Science and Technology（MS）Information management & Computer Vision Lab, Sep 2012 ~ July 2014
National Kaohsiung University of Applied Sciences（BS）Electronic Engineering, Sep 2008 ~ Jul 2012
Skill
Web Application:
Java/J2EE, Spring Boot, Spring5
SQL: MySQL, PostgreSQL, MongoDB
MessageQueue: RabbitMQ
Others: Docker, Jenkins, JUnit5, Spring Batch, Microservices, JMeter
TOEIC Listening & Reading Test ( Sept. 2019)
740 , Listening: 415 , Reading: 325
Experience
Rakuten Group, Inc. Backend Developer, July 2021 ~Present
Develop and maintain Item and shipment APIs (Item/Product/Inventory/Category/ImageResources/Shipping/FamilyMart/..) and handle DevOps for Rakuten Taiwan projects, collaborating with team members from Japan, China, and India.
FileManagement API Rakuten Cloud Object Storage and DB migration
- Refactor and migrate the file management api from NAS to Rakuten Cloud object storage.
- Develop the file migration tool with a thread pool to simultaneously migrate over 3 terabytes of files for all of
Rakuten TW's shops. - Initiate a discussion with the system engineer and backend leader to plan the file migration process, ensuring zero downtime and no data loss.
- Reduce the annual budget to approximately one-tenth of its current amount.
- Memory profiling with JMS and running stress tests with JMeter.
FamilyMart B2C project
- FamilyMartB2C as a new shipment option on the Rakuten e-commerce platform that empowers merchants to ship batches of products to distribution centers, ensuring faster delivery process for top merchants to ship their products.
- Design and implement a new Batch service for the new shipping method FamilyMart B2C in the Rakuten EC platform.
- Download shipping status files from FamilyMart's FTP server to update the shipping and order status on the Rakuten platform.
- Implement the deployment script for the Jenkins pipeline.
- Implement integration and unit tests to achieve a coverage rate of over 80% for quality assurance.
Resolve the database deadlock issue related to delete and re-insert operations
- Utilized SHOW ENGINE INNODB STATUS to analyze the database lock status for the READ COMMITTED transaction isolation level.
Shopping cart-revamp project
- Developed the new version Cart-API (Java and MySQL) to replace the legacy API (Ruby on Rails and NoSQL).
- Developed the Point handler business logic to calculate the Rakuten Super Point and shopper's Point Campaign.
Search Engine Feed project
- Develop the new version Search Engine Feed API (Java) to replace the legacy API (Ruby on Rails)
- Transform the data format from the relational database to search engine when the client updates shop/product/campaign information.
- Implement a full-shop feed to query all items within shops on the Rakuten platform in order to rebuild the search engine index.
- Implement a local cache for categories using a doubly tree data structure and read/write locks to retrieve tree paths instead of making repeated calls to the category API.
- Conduct a code review for colleagues and develop unit tests to achieve a test coverage rate of over 80% to ensure software quality.
- Developed data migration tool with spring-batch-partitioner
- Migrated 4 million records using multi-threading to reduce the processing time to approximately one-tenth of the original time (from 70 minutes to 7 minutes).
- Replaced the database from MongoDB with MySQL to speed up the API response time to reach 400 QPS.
InSynerger Technology Co., Ltd. Backend Developer, July 2018 ~ March 2021
Designed and implemented the SHARP Thailand IoT platform
- System Analysis and Design for SHARP Thailand's IoT application.
- Designed and implemented work order dispatch system and web-based production line dashboard application.
Designed and implemented a more light way Rule Engine System to replace the legacy system and Drools APIs
- Designed and implemented a Rule Engine using the Interpreter Pattern with postfix expressions and the Easy Rules library.
- Resolved a hierarchical and/or logic expression using stack data structure.
- Example: [(deviceA’s power > 100) and (deviceB’s current > 10)] or (deviceC’s voltage > 10).
Developed and maintained the streetlight IoT platform for Kaohsiung and Taoyuan city with 40000+ IoT devices
Developed a new Backend API to replace the legacy system from MVC Frameworks to pure APIs
- Reduced the number of database queries by over 50% compared to the legacy system.
PChome & Skype, Linktel Inc. Backend Developer, Aug 2016 ~ Nov 2017
- Developed and maintained the Skype official site purchase system.
- Refactored ten microservices of the Skype official site purchase system from Struts2 to Spring Boot.
ARPlanet Digital Technology Co.,Ltd. Backend Developer, Oct 2015 ~ Aug 2016
- Developed an image retrieval API for a mobile Augmented Reality app.
Education
Taiwan University of Science and Technology（MS）Information management & Computer Vision Lab, Sep 2012 ~ July 2014
National Kaohsiung University of Applied Sciences（BS）Electronic Engineering, Sep 2008 ~ Jul 2012
Skill
Web Application:
Java/J2EE, Spring Boot, Spring5
SQL: MySQL, PostgreSQL, MongoDB
MessageQueue: RabbitMQ
Others: Docker, Jenkins, JUnit5, Spring Batch, Microservices, JMeter
TOEIC Listening & Reading Test ( Sept. 2019)
740 , Listening: 415 , Reading: 325
Experience
Rakuten Group, Inc. Backend Developer, July 2021 ~Present
Develop and maintain Item and shipment APIs (Item/Product/Inventory/Category/ImageResources/Shipping/FamilyMart/..) and handle DevOps for Rakuten Taiwan projects, collaborating with team members from Japan, China, and India.
FileManagement API Rakuten Cloud Object Storage and DB migration
- Refactor and migrate the file management api from NAS to Rakuten Cloud object storage.
- Develop the file migration tool with a thread pool to simultaneously migrate over 3 terabytes of files for all of
Rakuten TW's shops. - Initiate a discussion with the system engineer and backend leader to plan the file migration process, ensuring zero downtime and no data loss.
- Reduce the annual budget to approximately one-tenth of its current amount.
- Memory profiling with JMS and running stress tests with JMeter.
FamilyMart B2C project
- FamilyMartB2C as a new shipment option on the Rakuten e-commerce platform that empowers merchants to ship batches of products to distribution centers, ensuring faster delivery process for top merchants to ship their products.
- Design and implement a new Batch service for the new shipping method FamilyMart B2C in the Rakuten EC platform.
- Download shipping status files from FamilyMart's FTP server to update the shipping and order status on the Rakuten platform.
- Implement the deployment script for the Jenkins pipeline.
- Implement integration and unit tests to achieve a coverage rate of over 80% for quality assurance.
Resolve the database deadlock issue related to delete and re-insert operations
- Utilized SHOW ENGINE INNODB STATUS to analyze the database lock status for the READ COMMITTED transaction isolation level.
Shopping cart-revamp project
- Developed the new version Cart-API (Java and MySQL) to replace the legacy API (Ruby on Rails and NoSQL).
- Developed the Point handler business logic to calculate the Rakuten Super Point and shopper's Point Campaign.
Search Engine Feed project
- Develop the new version Search Engine Feed API (Java) to replace the legacy API (Ruby on Rails)
- Transform the data format from the relational database to search engine when the client updates shop/product/campaign information.
- Implement a full-shop feed to query all items within shops on the Rakuten platform in order to rebuild the search engine index.
- Implement a local cache for categories using a doubly tree data structure and read/write locks to retrieve tree paths instead of making repeated calls to the category API.
- Conduct a code review for colleagues and develop unit tests to achieve a test coverage rate of over 80% to ensure software quality.
- Developed data migration tool with spring-batch-partitioner
- Migrated 4 million records using multi-threading to reduce the processing time to approximately one-tenth of the original time (from 70 minutes to 7 minutes).
- Replaced the database from MongoDB with MySQL to speed up the API response time to reach 400 QPS.
InSynerger Technology Co., Ltd. Backend Developer, July 2018 ~ March 2021
Designed and implemented the SHARP Thailand IoT platform
- System Analysis and Design for SHARP Thailand's IoT application.
- Designed and implemented work order dispatch system and web-based production line dashboard application.
Designed and implemented a more light way Rule Engine System to replace the legacy system and Drools APIs
- Designed and implemented a Rule Engine using the Interpreter Pattern with postfix expressions and the Easy Rules library.
- Resolved a hierarchical and/or logic expression using stack data structure.
- Example: [(deviceA’s power > 100) and (deviceB’s current > 10)] or (deviceC’s voltage > 10).
Developed and maintained the streetlight IoT platform for Kaohsiung and Taoyuan city with 40000+ IoT devices
Developed a new Backend API to replace the legacy system from MVC Frameworks to pure APIs
- Reduced the number of database queries by over 50% compared to the legacy system.
PChome & Skype, Linktel Inc. Backend Developer, Aug 2016 ~ Nov 2017
- Developed and maintained the Skype official site purchase system.
- Refactored ten microservices of the Skype official site purchase system from Struts2 to Spring Boot.
ARPlanet Digital Technology Co.,Ltd. Backend Developer, Oct 2015 ~ Aug 2016
- Developed an image retrieval API for a mobile Augmented Reality app.