yiwei.ch Open in urlscan Pro
96.44.182.131  Public Scan

Form analysis
1 forms found in the DOM

GET https://yiwei.ch/

<form role="search" method="get" class="search-form" action="https://yiwei.ch/">
  <label>
    <span class="screen-reader-text">Search for:</span>
    <input type="search" class="search-field" placeholder="Search …" value="" name="s">
  </label>
  <input type="submit" class="search-submit" value="Search">
</form>

Text Content

YIWEI CHEN


ENJOY THE BEAUTY OF PROGRAMMING.

Menu Skip to content
 * About
 * Contact

Search for:


ABOUT

Passionate programming lover, started coding at an early age. Keen on software
development and interested in big data (information retrieval, cloud computing,
machine learning, etc.) as well. Currently working as Software Engineer at
Microsoft.

yiwei.ch | yiwei.ch@live.com | github.com/yiweichen


WORK EXPERIENCE

SOFTWARE ENGINEER II
MICROSOFT
LONDON, UK, JUNE 2017 – PRESENT

 * Working in the Office Intelligence team on AI technologies in Microsoft
   products.

SENIOR SOFTWARE ENGINEER
OCADO TECHNOLOGY
HATFIELD, UK, MARCH 2017 – JUNE 2017

 * Supported the existing codebase and developed new features and improvements
   for the website with a Scrum team practicing agile software engineering
   methodologies.
 * Provided technical support and hotfixes on emergency issues with production
   systems.
 * Handled business queries and explained technical details to non-technical
   audience.
 * Expertised in several areas of the business systems and provided technical
   insights and advice in project planning meetings with product owners and
   stakeholders.
 * Coached and mentored new starters; hosted Scrum ceremonies.
 * Technologies included Java EE, Spring Frameworks, Struts, AWS, Selenium,
   Tomcat, SQL, HTML, CSS, JavaScript, jQuery, Backbone.js, etc.

SOFTWARE ENGINEER
OCADO TECHNOLOGY
HATFIELD, UK, SEPTEMBER 2014 – MARCH 2017

 * Software Engineer (SE1): September 2014 – August 2015
 * Software Engineer (SE2): September 2015 – March 2017
 * Developed new features and functionalities for Webshop (ocado.com)
 * Technologies involved: Java, HTML, JavaScript, CSS, jQuery, Sass, Struts,
   Spring Frameworks, Amazon Web Services, Selenium, etc.

SUPPORT ENGINEER INTERN
MICROSOFT
SHANGHAI, CHINA, JULY 2012 – MARCH 2013

 * 9-month internship as a Support Engineer Intern at APGC Global Technical
   Support Center in Shanghai, as well as a member of the Microsoft Private
   Cloud project.
 * Main responsibilities included design and deployment of private cloud
   solutions, developing automated deployment scripts, tutorials, demos
   and manuals, trouble-shooting for private cloud deployments, etc.


EDUCATION

M.SC. IN WEB SCIENCE AND BIG DATA ANALYTICS
DEPARTMENT OF COMPUTER SCIENCE, UNIVERSITY COLLEGE LONDON
LONDON, UK, SEPTEMBER 2013 – SEPTEMBER 2014

 * GPA: 80.17%, Distinction honours degree.
 * Core topics: Information Retrieval, Data Mining, Cloud Computing (Hadoop,
   AWS), Machine Learning, Distributed Systems, etc.
 * Thesis topic: Learning from User Interactions in Information Retrieval
   (supervised by Dr. Katja Hofmann from Microsoft Research Cambridge).
 * Hands-on course projects: information retrieval models and evaluation, Hadoop
   programming (e.g. PageRank, document indexing), data mining and prediction
   (e.g. spam detection, online-ads click-through rate prediction), distributed
   system design and implementation, OpenGL programming, wireless sensors
   networking programming, etc.

B.ENG. IN SOFTWARE ENGINEERING
SCHOOL OF SOFTWARE ENGINEERING, TONGJI UNIVERSITY
SHANGHAI, CHINA, SEPTEMBER 2009 – JUNE 2013

 * Core topics: Operating Systems, Computer Networks, Programming languages
   (C/C++, C#, Java, etc.), Databases, Data Structures, Algorithms,
   Object-Oriented Analysis and Design, Design Patterns, Compiler Principles,
   Embedded Systems, Software Engineering, etc.
 * Core member of the university team for ACM International Collegiate
   Programming Contests, won several medals in the Asian regionals.
 * Intensive coding practice in courses, involving various programming
   languages.
 * Outside the courses, highly interested in web development.
 * Thesis project focused on WebSocket and implemented a web-based real-time
   online auction system with PHP, MySQL, HTML5, CSS3, jQuery, Node.js, etc.


SKILLS

 * Programming: C, C++, PHP, JavaScript, jQuery, HTML, CSS, XML, JSON, SQL,
   Python, C#, Java, Node.js, Lua, etc.
 * Data Analysis: Hadoop, AWS, Information Retrieval, Data Mining, Machine
   Learning
 * Languages: English, Chinese Mandarin, Chinese Hokkien


PUBLICATIONS

Online Learning to Rank: Absolute vs. Relative [PDF] [Poster]
Yiwei Chen and Katja Hofmann
The Companion Proceedings of the 24th International Conference on World Wide Web
(WWW 2015), pp. 19-20, Association for Computing Machinery (ACM)
Florence, Italy, 20 May 2015.


CONTESTS AND AWARDS

 * 2014 UCL Real-Time Bidding Algorithm Challenge, ranked 3rd of 17 teams.
 * 2013 Microsoft Beauty of Programming, Semi-final advanced.
 * 2011 Tongji Programming Contest, First Prize, ranked 4th of 66 teams.
 * 2011 ACM International Collegiate Programming Contest, Asian Regional
   (Fuzhou) Invitational, Silver Medal.
 * 2010 ACM International Collegiate Programming Contest, Asian Regional
   (Chengdu), Bronze Medal.
 * 2010 NetEase Youdao Programming Contest, Round 3 advanced
 * 2010 Google Code Jam, Round 2 advanced, ranked 588th global
 * 2007 National Olympiad in Informatics in Provinces, First Prize


SELECTED PROJECTS

LEARNING TO RANK IN INFORMATION RETRIEVAL, APRIL – SEPTEMBER 2014

The thesis project of my Master’s degree, providing an empirical analysis of
approaches for online learning in information retrieval. With Machine Learning,
an information retrieval system could adapt itself to the users by learning from
their interactions with the system, e.g. clicks on the result list. However,
learning from user interactions is challenging, as the interaction feedback is
usually noisy and likely to change when the system changes. The main objective
of this work was to implement and compare the two different categories of
algorithms proposed for dealing with the learning from user interactions problem
in information retrieval. We conducted two experiments in total and presented
results of our experiments as well as an empirical analysis on these approaches.
Findings from this work include the relative performance of these approaches
compared in terms of their learning speeds, noise-resistance abilities,
performance limits, and preferred application scenarios.

REAL-TIME BIDDING CLICK-THROUGH RATE PREDICTION, MARCH 2014

A UCL data mining challenge about online advertising. The goal was to predict
click-through rates of each future online-ads impression, given historical data
collected in the past. The training data was in the form of raw features (e.g.
user-agent string, advertiser id). After processing the raw data into normalized
feature values, applying regression model and conducting the training, our
prediction results ranked 3rd among 16 participating teams. Python was used as
the primary programming language in this project.

REAL-TIME ONLINE AUCTION SYSTEM, MAY 2013

The thesis project of my Bachelor’s degree, aiming to make use of the newly
proposed feature of HTML 5, the WebSocket protocol, in an application that
requires high real-time capability. The system was implemented using mainly PHP
+ MySQL, as well as Node.js for the real-time bidding server. The
Socket.IO framework was used to implement real-time communications between the
server and clients. The library jQuery and new features of HTML5 and CSS3 was
used in the front-end development.

WORDPRESS PLUGIN: CHINESE TAG NAMES, MARCH 2012

A small plugin that solves a big problem. There is a bug in WordPress running on
Windows servers that annoys Chinese WordPress bloggers. When a tag contains
Chinese characters, its permalink cannot be accessed correctly. This plugin
solves the problem. In fact, once the plugin is installed, all permalinks (tags,
categories, articles, authors, pages, etc.) containing Chinese characters can be
accessed. The plugin is published on the official site and have more than a
thousand downloads.

WORDPRESS PLUGIN: RENREN CONNECT, MARCH 2012

A WordPress plugin that connects the blog site to RenRen, a Chinese
Facebook-like social network. Using OAuth 2.0, this plugin provides features
such as third-party account login, synchronizing statuses and posts, displaying
latest statuses from RenRen, etc. The plugin is coded in PHP, and integrated
properly with the WordPress dashboard, by invoking the WordPress APIs. It also
employs jQuery for its front-end features.


OTHERS

 * Guitarists Club of Tongji University – Staff Member, 2010 – 2013
 * D-Bug, a campus band in Tongji University – Founder, Vocal, Rhythm Guitarist,
   2009 – 2013
 * Student Union of School of Software Engineering, Tongji University – Staff
   Member, 2009 – 2013
 * Welcome Ceremony & English Evening of School of Software Engineering –
   Organizer, 2009 – 2010



Proudly powered by WordPress