Charles Lee, Developer in New York, NY, United States

Charles Lee

Query Optimization Developer

Location
New York, NY, United States
Toptal Member Since
June 18, 2020

Charles is an application and database developer with more than 5 years of experience. He has been the database owner of multiple products—including an automation tool used extensively in asset management at JPMorgan Chase and a bank deposits pricing tool with 20+ clients and more than $1 billion under analysis.

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Portfolio

Novantas
Windows PowerShell, Sublime Text, Subversion (SVN)...
JPMorgan Chase
Informatica, Oracle, Visual Studio, SQL Server Management Studio...

Experience

T-SQL (Transact-SQL) - 5 yearsMicrosoft SQL Server - 5 yearsPerformance Optimization - 4 yearsQuery Optimization - 4 yearsOperations Research - 4 yearsBlockchain - 1 yearPython - 1 year

Location

New York, NY, United States

Availability

Part-time

Preferred Environment

Spyder, Sublime Text, SQL Management Studio, Windows

The most amazing...

...business I considered recently was a joint venture to buy a Bitcoin ATM and put it in a high-traffic area in New York City or India.

Work Experience

2014 - 2017

Senior Database Developer

Novantas
  • Worked as the database owner of a bank deposits analytics dashboard with 20+ clients and more than $1 billion in total assets under analysis.
  • Helped a triple-client base and assisted an international expansion by maintaining a master version of the SVN code repository and synchronizing the shared code across all clients and environments.
  • Coordinated the database deployments of bi-monthly UI releases across 5 time-zones and multiple servers.
  • Developed new features, enhancements, utilities, and bug fixes—e.g. improved the accuracy of tracking CD renewal balances.
Technologies: Windows PowerShell, Sublime Text, Subversion (SVN), SQL Server Management Studio, Microsoft SQL Server
2011 - 2013

Application Developer

JPMorgan Chase
  • Led the development of a technology cost savings initiative that was promoted globally and led to $3 million in savings for asset management in 2012.
  • Brought transparency to recurring and erroneous technology charges via monthly billing to all asset management end-users.
  • Led the development of a suite of email-based automation tools used firm-wide—15,800 distinct users and 116,000 transactions processed in 2012.
  • Owned the Informatica ETL process and Oracle PL/SQL algorithm that allocated server-level costs to individual applications based on usage.
Technologies: Informatica, Oracle, Visual Studio, SQL Server Management Studio, T-SQL (Transact-SQL), Subversion (SVN), VB.NET, C#, Microsoft SQL Server

Experience

Personal Website | Hugo on GitHub Pages

https://github.com/charlesjlee/charlesjlee-website
This GitHub repository contains both the code for my personal website (master) and the files built using Hugo (GitHub-pages).

Steem Upvote Bot | Python and Heroku

https://github.com/charlesjlee/steemBot
Steem is a blockchain-based, social news platform where posters and upvoters, i.e. curators, are rewarded directly with cryptocurrency. This is a guide to creating a simple bot that will periodically upvote a random post on the Steem blockchain.

Skills

Languages

SQL, T-SQL (Transact-SQL), Python, VB.NET, C#, Visual Basic .NET (VB.NET)

Storage

Databases, Microsoft SQL Server, SQL Server Management Studio, PL/SQL, PL/SQL Developer, Oracle PL/SQL, PostgreSQL, SQLite, MySQL

Other

Freelancing, Software Development, Blockchain Development, Performance Optimization, Operations Research, Query Optimization, Informatica, Algorithms, Machine Learning, Data Structures, Bitcoin, Deep Learning

Frameworks

Windows PowerShell

Libraries/APIs

Scikit-learn, SciPy, NumPy, Pandas

Tools

SQL Management Studio, Spyder, Visual Studio, Subversion (SVN), Sublime Text, Sublime Text 3, Notepad++, Git, Jira, MATLAB

Platforms

Windows, Oracle, Blockchain

Education

2007 - 2011

Bachelor of Science in Operations Research

Cornell University - Ithaca, NY, USA