Sean Wu, Developer in Cary, NC, United States
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Sean Wu

Verified Expert  in Engineering

Software Developer

Location
Cary, NC, United States
Toptal Member Since
June 18, 2020

Sean is an expert in database design and development with a focus on in-house application development. He is ready to support executive decision making and production improvement processes for businesses of any size.

SQLWindowsSQL Server 2008SQL Server 2014SQL Server 2016Microsoft SQL ServerT-SQL (Transact-SQL)C#.NETMicrosoft Visual StudioExcel 2016Software DevelopmentMicrosoft Access.NETAzure SQLAzure SQL DatabasesAccess API

Portfolio

Blue Cross Blue Shield NC
Star Schema, Entity-relationships Model (ERM), Teradata, Excel 2016, Windows...
McKeil Marine (via Toptal)
Entity-relationships Model (ERM), Azure SQL, Excel 2016, Windows, SQL
CCL
MacOS, Software Development, .NET, Microsoft Access, Excel 2016...

Experience

Microsoft SQL Server - 10 yearsT-SQL (Transact-SQL) - 10 yearsSQL - 10 yearsC#.NET - 8 yearsMicrosoft Visual Studio - 8 yearsAzure SQL - 2 yearsAzure SQL Databases - 2 yearsAmazon Web Services (AWS) - 1 year

Availability

Part-time

Preferred Environment

Microsoft SQL Server

The most amazing...

...database I've designed was for a high-secure organization requiring serial number production with no duplication.

Work Experience

Data Modeler

2018 - PRESENT
Blue Cross Blue Shield NC
  • Designed and created database models for enterprise-wide projects.
  • Created tables and views.
  • Performed data analysis.
  • Completed R&D for new technology.
Technologies: Star Schema, Entity-relationships Model (ERM), Teradata, Excel 2016, Windows, C#, Tableau, Python, SQL

SQL Developer

2019 - 2020
McKeil Marine (via Toptal)
  • Developed a business oriented database on Microsoft Azure from scratch.
  • Created all tables based on business needs.
  • Created complex stored procedures to meet business requirements.
  • Created complex views.
  • Created triggers.
Technologies: Entity-relationships Model (ERM), Azure SQL, Excel 2016, Windows, SQL

Database Developer and Administrator

2010 - 2018
CCL
  • Designed, created, and managed primary objects such as tables, triggers, database links, indexes, and privileges based on a logic design model.
  • Developed all the required stored procedures, user-defined functions, and dataset results in reporting services to reduce code complexity and optimize performance.
  • Developed applications for manufacturing efficiency improvement.
  • Created conceptual, logical, and physical data models for creating the schema using MS Visio and ER/star/snowflake schema for data marts.
  • Applied technical skills using SQL, Excel in data collection, data analysis, and reporting to procure data from database structures to report and provide solutions to client requests in a timely manner.
  • Contributed to building business dashboards to conduct trend analysis on sales metrics especially relating to driving sales revenue, customer retention, and production.
  • Tuned, troubleshot, evaluated, and recommended database hardware and software including support tools to increase performance.
  • Provided support to developers for integrating development environment (C#) into databases.
Technologies: MacOS, Software Development, .NET, Microsoft Access, Excel 2016, Microsoft Visual Studio, C#.NET, SQL Server 2016, SQL Server 2014, SQL Server 2008, Windows, Snowflake, Star Schema, Entity-relationships Model (ERM), Visio, Data & Backup Management, Microsoft SQL Server

Production Control Portal

This is a web-based internal portal for
1) employees logging their working hours to work orders
2) supervisors logging in to run reports and modify incorrect data entry
3) executive team logging in to run production-related reports for decision making
4) sales team logging in to enter new or potential sales opportunity
5) viewing of production real-time dashboard

It is made with ASP.NET, using C# on the front-end and Microsoft SQL Server on the back-end.

Business Oriented Database

The client needed a website for trip planning. I created the database on the back end from scratch, including logical model design, physical model deployment, table and view creation, and complex stored procedures design and creation to meet all business needs.

Marine Voyage Tracking System

I worked as a database developer to create the entire database, including tables, views, triggers, and stored procedures for a web-based marine voyage tracking system for a marine transportation company. The database is on Microsoft Azure.

Languages

SQL, T-SQL (Transact-SQL), C#.NET, Snowflake, Python, C#, Java, Python 3

Platforms

Windows, Amazon Web Services (AWS), MacOS

Storage

SQL Server 2016, SQL Server 2008, SQL Server 2014, Microsoft SQL Server, Azure SQL, Azure SQL Databases, Teradata

Other

Software Development, Entity-relationships Model (ERM), Star Schema, Data & Backup Management

Tools

Microsoft Visual Studio, Excel 2016, Microsoft Access, Visio, Tableau

Frameworks

.NET

2007 - 2009

Master's Degree in Information System

University of North Carolina at Greensboro - North Carolina

2002 - 2006

Bachelor's Degree in Computer Science

Zhengzhou University - China

MARCH 2021 - MARCH 2024

AWS Certified Cloud Practitioner

Amazon Web Services

MARCH 2017 - PRESENT

Microsoft® Certified Solutions Expert: Data Platform

Microsoft

FEBRUARY 2017 - PRESENT

Microsoft® Certified Solutions Expert: Business Intelligence

Microsoft

JANUARY 2017 - PRESENT

Microsoft® Certified Solutions Expert: Data Management and Analytics

Microsoft

DECEMBER 2016 - PRESENT

Microsoft® Certified Solutions Associate: SQL Server 2012/2014

Microsoft

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