Project 3: Web Scraping company data from and

Posted on Mar 20, 2016

Contributed by Sung Pil Moon. He attended in the NYC Data Science Academy 12 week full time Data Science Bootcamp program taking place between January 11th to April 1st, 2016. This post is based on his third class project - Web scraping (due on the 4th week of the program)


Overall goal:

Provide overall insight of companies based on current job openings with embedded interactive shiny app.

Specific goal:

Packages (libraries) used:

  • Python (for Web scraping and data manipulation): BeautifulSoup, Pandas, Re
  • R (for data manipulation and visualization): Shiny Dashboard, DT, ggplot2, dplyr, SnowballC, wordcloud, fmsb, kernlab

1. Extracting job and company data from

To achieve the data extraction (web scraping) and manipulation, I used the Python and BeautifulSoup library. Each step is described below in detail.

1.1. Get a full list of jobs from

The first step was to get a list of jobs from before I get the detailed information of each company from the list.  The code snippet below shows the preparation step for web scraping.

Then, it accesses all the page having recent job lists and stores the detailed job information into the data frame.

This is the one example of the returned result

1.2. Get a detailed company information from the job link

Detailed company information can be obtained through a link in the data table in the previous step. The below code snippet describes this step, including accessing detailed company page from a link if exists, cleaning keywords using the Python regular expression (re library), and storing six types of company ratings into the data frame.

The returned result within the data frame look like this


This is the command to save the data frame in csv format.

1.3. Exploring the extracted data in Shiny dashboard application

As a result of the previous steps, I could get a data frame containing information of 900 jobs related to data scientist position. To get an overall insight of the data, I created a shiny dashboard app. Each row has information of

  • Job-related: Job title, Job location, Date job posted, A link to the job description page
  • Company-related: Company name, A link to company description page in, Overall rating of a company, Work-life balance rating, Company culture rating, Benefit / compensation rating, Job security rating, Management / CEO rating.


2. Exploring interactive K-means cluster analyses with the extracted data

Interactive K-means cluster analysis is implemented and embedded in the shiny application to get basic concept of how K-means cluster analysis and unsupervised learning work. Although the job / company data does not perfectly fit to K-means cluster analysis, it was used as a data source for analysis because I do not predict anything, but try to identify what patterns exist in the data set. (Note that a cluster in this context means a group of companies having the same range of ratings that a user filtered. For example, an example of a cluster can be a list of companies that have work-life balance rating of 4.5 and culture rating of 4.0)

Possible basic questions with the extract data set can include:

  • What are the approximate sizes of subgroups (= clusters) in the data?
  • What are the commonalities of companies in the same subgroup?

2.1. Scatter plot for K-mean clusters

The first component is a scatter plot showing the clusters divided by k. The k value and 6 variables for analysis can be interactively selected by a user (The default value of K is 2).

* Note that each cluster is visually distinguished by distinct colors. However, this color does not have any statistical and analytical meaning.


2.2. Scree Plot and WCV table

As the number of clusters increases, the values of overall WCV (Within Cluster Variance) get continuously decreased. However, a proper k-value should be decided before all data points become centroids. Therefore, the interactive scree plot is integrated to provide a method to visually inspect an appropriate K value.


When a user changes a k-value in the options component, the dotted lines in the scree plot will be updated. The table of the Within cluster variance is located on the right side of the scree plot displaying the detailed WCV values corresponding to the number of clusters.

2.3. Aggregated values of K-cluster and radarChart

The value boxes include the aggregated values of the cluster a user chosen including overall ratings, work-life balance rating, culture rating, compensation / benefit rating, job security rating, and management rating. The radar chart is embedded to provide an effective way to compare multivariate data between the chosen cluster and the overall data set.


2.4. Data Table of K Cluster

The data table show a list of data belonging to the same cluster a user selected. A list is updated whenever a user changes the options.


3. Sentiment analysis of reviews based on the extracted company data

Review contents of the companies were extracted from and analyzed. Since the primary focus of this project is not on a deep analysis of company review, only the featured review per a company was chosen for analysis. (Also, no duplicated company exists in the data.)

3.1. Frequency Table of Positive & Negative Review Words

The table below shows a list of reviews about companies extracted from the, including company name, overall ratings, review summary, pros and cons of each company.


3.2. Word cloud of Positive & Negative Review Words

A word cloud component highlights the most frequently used words in a simple, clear and visually attractive way.

The two wordClouds are embedded in the application:

  1. A word cloud of positive review words
  2. A word cloud of negative review words.

R package libraries, tm, snowball, and wordcloud, are used for text mining to classify the more frequently used review words.


An interesting finding is the size difference between two word clouds (smaller size of positive word cloud and bigger size of negative word cloud). This is the same line of many research findings that most people tend to process positive and negative information differently and more constructively criticize when they are involved in negative emotions (Related article: Tugend, A. (2012, March 23). Praise is fleeting, but brickbats we recall. The New York Times. Retrieved from

4. Identifying the most frequent keywords in job summaries

Extending to utilizing the basic text mining technique used in the previous word cloud component, I also tried to find what keywords are more frequently used in the job description. I thought it will be beneficial for job seekers to include those keywords to attract recruiters' attentions.

The code snippet shows how to pull a list of keywords in the job summaries from the

A list of the most frequently used keywords are extracted from total 819 companies and displayed in the below table and word cloud.



5. Conclusion

In this project, this application tested a web scraping technique using Python with BeautifulSoup library to extract job and company-related data and several wordCloud components to find hidden insights. The application also provided an interactive element of K-means cluster analysis to better understand a concept of unsupervised learning based on the extracted data.

As next steps, I plan followings:

  • Embedding another unsupervised learning, such as Hierarchical clustering analysis, with a different data set which better fits for the analysis
  • More pruned text-mining techniques for accurate keyword/sentiment analyses

Please send me an email to [email protected] if you have any question or suggestion or found any technical error in the application.

Enjoyed reading this project? Now it's your turn.
Get information about our data science programs and see how we can help you launch your data science career.

About Author

Sung Pil Moon

Sung Moon is a recent graduate from the Ph.D. program in Human-Computer Interaction, School of Informatics, Indiana University (Indianapolis, IN). Through several startup activities and various research projects collaborating with MITRE, a research corporation, he found opportunities to...
View all posts by Sung Pil Moon >

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