Zhang Jian

• In the first nine months, I systematically studied algorithms and the Go, C++, C#, and Java programming languages. Then, I developed an algorithm learning website leetcode blog, using Ruby on Rails 8.
• Led the development of Me.Expert – a platform enabling developers to build their online brand with blog, portfolio, and resume features.

I led a team of four to crawl 55 million profiles for a client, reducing the cost per profile to just $0.00068. The client was highly
satisfied with the results.

Tech stack:

• JavaScript: Puppeteer and Chrome Extension.
• Python: Django, REST framework, Celery, SQLAlchemy, BeautifulSoup4, etc. Docker, PostgreSQL, Redis, Sentry.io, etc.
• AWS: ECS, ElasticBeanstalk, SQS, SES, etc.

Overwatch is a website for analyzing programmer productivity. It includes a SPA website and a Django backend. It integrates with GitHub and Jira, and any event from a user who has installed the Overwatch App is sent to the backend.

I led a team of four to build this system. I was the architect, and the first reviewer for every PR.
This project is a success because we finished tremendous of work in 9 months.
We kept the backend test coverage 100%.
All frontend pages are also covered by test code.
Our clients praised us several times

Tech stack:

• Python: Django and Rest Framework, Celery.
• JavaScript: ReactJS, Material UI.
• Others: Docker, PostgreSQL, Jenkins.
• AWS: Route 53, CloudFront, S3, ElasticBeanstalk.

• Self project: Money tool (a WeChat mini-program)
• Designed and implemented a website for managing Apps, message pushing and mobile devices registering, etc.
• Taiwan patent project. Developed Chrome Extension interacting with Rails backend to simplify the US patent browsing experience.
• https://fixtw.com/. Contributed to Tainan, Taoyuan, and Jilong areas' features.

Tech stack:

1. Rails tech stack: Devise, Cancancan, simple_form, Webpacker, Sidekiq, Responders, Kaminari, Ransack, Faraday, RSpec (test coverage 100%), WebMock, Pry, etc.
2. JavaScript: WeChat Mini-program, Chrome Extension, Bootstrap 4, Yarn, ECharts, Tabler, Turbolinks, Flatpickr, etc.
3. Others: MongoDB, ImageMagick, etc.

• I led a team of three to build a call center SaaS. This SaaS was characterized by high concurrency and eventually became a successful commercial project.
• I was responsible for designing and implementing most of the web functionality, including the backend code.