Shanglun Wang, Developer in New York, NY, United States
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Shanglun Wang

Verified Expert  in Engineering

Python Developer

New York, NY, United States
Toptal Member Since
December 16, 2016

Sean is a dedicated developer with ten years of experience in full-stack web development, system administration, and data science. Proficient in both Linux and Windows environments, he has successfully created a diverse range of applications, from machinery interfaces to market intelligence software. Beyond his technical skills, Sean is also a polyglot and an excellent communicator who enjoys spending his spare time coaching speech and debate.


Quantitative Startup
C#, React, Meteor, Pandas, Python
CB Insights
Swagger, Stanford NLP, Java, Apache Thrift, Node.js, React, Go, Python
Digital Vision, Inc.
JavaScript, Python, MySQL, PHP, C#, C++, C




Preferred Environment

Vim Text Editor, Visual Studio, PyCharm, Windows, Linux

The most amazing...

...piece of software I've developed can decode Chinese-written news articles and extract market intelligence data for an English-speaking audience.

Work Experience

Quantitative Developer

2017 - 2018
Quantitative Startup
  • Wrote second generation risk mitigation algorithms using Python and Pandas.
  • Developed web applications using Meteor and React to facilitate client engagement.
  • Built proprietary risk-compression optimized data pipeline engine allowing for intelligent reporting, warm restarts, improved logging, and parallel processing.
Technologies: C#, React, Meteor, Pandas, Python

Full-stack Software Developer

2016 - 2017
CB Insights
  • Developed market intelligence software using Java and Python natural language processing technology that allowed investment information to be extracted from Chinese news sources.
  • Managed and developed a data ingestion system for funding and company valuation data—including monitoring, reporting, and load-balancing systems.
  • Designed, developed, and maintained client-facing React web applications to manage and display data on the CB Insights platform.
  • Built microservices based on Node.js,, Thrift, and Docker to improve system reliability and internal API consistency.
  • Built and created custom email-tracking software to improve targeted email marketing and outreach.
  • Developed and maintained Go REST APIs to power the main data visualization and management platform.
Technologies: Swagger, Stanford NLP, Java, Apache Thrift, Node.js, React, Go, Python

Software Developer

2013 - 2016
Digital Vision, Inc.
  • Conceived and developed a software suite to monitor and analyze breakage statistics and inspection results in optical manufacturing laboratories which helped bring breakage rates to industry record lows.
  • Worked with outside software vendors to developed and maintain XML endpoints for integration with third-party products.
  • Managed CentOS/RHEL data server running LVM and ZFS and developed data monitoring software using Python, PHP, MySQL, and JavaScript.
  • Developed a suite of GUI and command-line applications to manage inventory and automate monthly and replenishment ordering of optical lenses.
  • Provided onsite support and trained customers in order to improve customer effectiveness in using the software system.
Technologies: JavaScript, Python, MySQL, PHP, C#, C++, C

Sentiment Analysis Bot
For my article for the Toptal Engineering blog, I built an email-and-texting bot to analyze incoming emails for sentiments and send out alerts as needed.

I use Python, Flask, Apache Thrift, Java, and Stanford's NLP Library. I also used SendGrid and the Twilio API to build email and text message integrations.
2009 - 2013

Bachelor's Degree in Economics-Mathematics

Whitman College - Walla Walla, WA, USA


React, Node.js, Lodash, Chai, Stanford NLP, PhantomJS, SQLAlchemy, Flask-RESTful, Pandas, Twilio API


Mocha, Jira, Stanford NER, PyCharm, Visual Studio, Vim Text Editor, SendGrid


ASP.NET, Apache Thrift, Flask, Swagger


Go, JavaScript, Java, C, Python, C++, C#, Clojure, PHP


Meteor, Amazon Web Services (AWS), Windows, Linux


Microsoft SQL Server, MySQL/MariaDB, MongoDB, MySQL


Agile Software Development


Mixed-integer Linear Programming, Operations Research, HTML Parsing (Cheerio), WebSockets, Natural Language Processing (NLP), Full-stack, Front-end Development, Generative Pre-trained Transformers (GPT), Offensive Security, Economics

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