Xenor Chang
Verified Expert in Engineering
Turbolinks Developer
Taipei, Taiwan
Toptal member since September 30, 2019
Xenor is an experienced full-stack web and software developer with expertise in Ruby, Ruby on Rails, JavaScript, and HTML5/CSS.
Portfolio
Experience
Availability
Preferred Environment
Atom, Git, MacOS
The most amazing...
...thing I've coded is a delayed job framework combining relational database and non-relational database.
Work Experience
Independent Contractor
Listia Inc.
- Solved web application issues and blockchain-related problems.
Lead Developer
Listia Inc.
- Migrated behavior-based vanilla JavaScript to ReactJS components.
- Migrated Rails from 3 to 4, and using Rails 5 for new projects.
- Maintained and wrote Ethereum Smart Contracts using Solidity.
- Maintained and evolved an Ethereum blockchain processor framework built with CTO.
- Managed a team of 4, being a bridge that communicates between US and TW team, pass down project specs and make critical technical decisions with CTO.
Web Developer
Listia Inc.
- Built API back-end for Listia mobile clients.
- Built delayed job framework that combines SQL and NoSQL job serialization/deserialization, enqueue, and error handling.
- Built a cron job framework with CLI that can securely run jobs with monitoring and reporting tools.
Web Developer
Code Green IT
- Worked on a golf handicap registration system using Rails 3.
IT Manager
Winjet Co
- Maintained and built a B2C EC platform combining front store and ERP management.
Experience
Replin
Education
Bachelor's Degree in Psychology
National Chengchi University - Taipei, Taiwan
Skills
Libraries/APIs
X (formerly Twitter) API
Tools
RSpec, Amazon Simple Queue Service (SQS), AWS, Git, Atom
Languages
Ruby, JavaScript, TypeScript, CSS3, HTML5, CoffeeScript, C#, PHP
Frameworks
Ruby on Rails, Stimulus, Symfony, .NET, Jasmine, Symfony
Storage
MySQL, Redis, SQLite, MongoDB
Paradigms
Agile Development
Platforms
AWS Elastic Beanstalk, MacOS, Ethereum, Android, iOS
Other
Turbolinks, Amazon Route 53
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