Profile image of zhangyingtai
Flag of China Dandong, China
Member since February 19, 2017
1 Recommendations


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Hi I am a senior python, mobile and backend developer with 8 years of professional experience. My experiences are - Data Visulization o Libraries: bokeh, matplotlib, , d3.js o Projects: road networking system, car-bike relationship - Machine Learning o Libraries: Tensorflow, Scikit-learn, Pytorch, Pandas, Numpy o Models: CNN, RNN and RNN o Projects: Car Distance Detection, Image Classification, Price Prediction Model - Web Development o Django, Flask, AngularJs, VueJs, NodeJs o Projects: , , - AWS S3, EC2, DynamoDB and SWF - Web Scraping o Scrapy, Requests, BeautifulSoup and Selenium o Aliexpress, Pipl, Secfilling and CAD sites. o Facebook, Instagram and Twitter - Server Administration Automatic deploying with Fabric and Ansible - iOS/Android app develoment(Native and Hybrid) - Backend Web Service development If you are looking for agile and reliable python and mobile developer, that's just me. I will do my best for the project. Thanks.
$25 USD/hr
84 reviews
  • 98%Jobs Completed
  • 83%On Budget
  • 96%On Time
  • 18%Repeat Hire Rate


Recent Reviews

  • image of ronan16 Help to config or implement Bitmex Market Maker bot $350.00 USD

    “CAUTION. Although he have a very good rate here he did not made the project. He sent ***30*** updates of the bot and now i believe the 30 version were the same. the script needes to try to buy and sell between spread. but after a few hours it starts to send only buys or only sells. This problem was explained in details. He said he undestood but after 30 versions there is no change the reason i think now that the 30 version are the same is that today after request his test account to see if the bot was working (as he said) he refused. Then gave me acess to his computer. I could see that there was only 5 hours of test and he nows since the first unsuccessful test that the bot works well for this time. THE WORST part is that he insist in childish lying about bitmex history. I use it since the begining and IT WAS WHAT WAS USED BETWEEN US to testify the failed test,. So it is ridiculous he insist in that to say that the bot worked well for 24 hours why would his bot works well in his pc and not in my real and test accounts? i tried to help him A LOT with this bot. I sent a lot of emails to bitmex staff to help. I even got FREE HELP from Gunars Kepe from another freelancer site. the bot is 100% useless to me because sooner or later it starts to send a lot of buy orders and broke the account”

  • image of support372 automation with katalon studio $800.00 USD

    “superb job done , will hire again”

  • image of ansgarwalther Web Scraping in Python £450.00 GBP

    “Competent python programmer”

  • image of katiflores Project for Yongtao J. $50.00 USD

    “Working with Yongtao is the best choice in terms of speed, quality and subject matter expertise (SME)”

  • image of katiflores Webscrape using PYTHON SELENIUM the product information from Performance Health in Key Value Pair Format $555.00 USD

    “Yongtao is a SME (Subject Matter Expert) in the area. I am happy I found him, the team is already learning tons from Yongtao !”

  • image of AndyShop Amazon data extraction under specific category for marketplace research $450.00 USD

    “Great Job. very professional and fast with the job. Keep it up.”


Data Miner

Feb 2008 - Dec 2015 (7 years)

I was responsible for scraping data from various sites. Our company could make a plan based on the data.


Master of Applied Science

2004 - 2008 (4 years)


  • Preferred Freelancer Program SLA
  • Python Level 2
  • US English Level 1
  • Python Level 1


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