SUMMARY:

Self - taught web developer with a proven track record, combining the skills of a deeply technical software engineer with that of a seasoned all-rounder. With a background in ecommerce and service-oriented applications as well as a handle on the latest Microsoft web technologies (but can also go old school), Mr. Pfefferkorn is the perfect individual for developing web-based payment-centric applications.

TECHNOLOGIES:

SQL Server 97-2008 .NET Frameworks 1.1, 2.0. 3.0. 3.5 , 4.0, Classic ASP, C#.net, VB.net, LINQ, ASP.NET AJAX, Javascript, Microsoft Access, Microsoft Office various versions, IIS 3-7, VB 6.0 PHP, MySQL, Perl, Java, PCI-compliance.

EXPERIENCE:

Confidential, Annapolis, MD

Senior Software Applications Engineer

Responsibilities:

• Develops web applications as member of Confidential (formerly Confidential ) Workforce Management team. Developed parts of web-based element of WFM enterprise suite. Used ASP.NET 3.5 (mostly VB, some C#), LINQ, SQL 2005/8, ASP.NET AJAX, Infragistics, JS, Subversion, Jira. Occasional work in classic ASP and VB6 to support older versions of product in production.
• Worked primarily on enterprise scheduling. Maintained and developed new, complex stored procedures. Designed new database structures (stored procs, functions, tables) to support enhancements. Took ownership of and improved large volume of code during period of turmoil surrounding serial mergers with attrition by senior talent. Increased my skills in OOP and functional programming a great deal while maintaining and extending code written by top notch OOP coders.
• Mentored junior developers, BA, and QA personnel.
• Started work in 2009 for Confidential . Confidential was acquired and taken private by Confidential in 2011.

Confidential, Owings Mills, MD

Software Engineer

Responsibilities:

• Built public-facing ecommerce system from scratch. Revenues increased from $24 million dollars per year in the first year to roughly $80 million dollars in the 3rd and 4th years. Started with inexpensive Confidential shopping cart and customized/scaled up to specifications of marketing department, managed hosting and databases. Revenues through this cart increased eleven-fold over 2 years.
• Maintained application and database security and patched vulnerabilities, in conjunction with penetration testing performed by outside service.
• Set up and managed Confidential vendor and built wildcard Confidential applications to serve the needs of the business.
• Developed real-time reporting system for tracking revenue on yearly, monthly, weekly, daily, hourly, and up-to-the-minute time scales.
• Migrated web sites and databases from shared hosting to dedicated servers to networks of dedicated servers. Moved web/data server network from one data center to another data center with minimal downtime.
• Developed numerous intranet web applications for managing enterprise, in addition to public-facing interactive web sites, including numerous shopping carts for various business channels.
• Architected, built automatic, and operated shipping program (Autoship - now called Confidential VIP program).
• Integrated web site in data center with legacy accounting system (Navision).
• Survived numerous IT department regime changes to become the senior institutional memory of the business, from the standpoint of IT.
• Integrated third party shipping calculation services
• PCI-compliance

Confidential, Owings Mills, MD

Software Engineer

Responsibilities:

• Built, deployed, and maintained high-performance public-facing shopping cart from scratch using Microsoft technology stack (SQL Server 2005, C#, ASP.NET), incorporating numerous custom business rules designed around network marketing channel of Confidential (aka Confidential ). See TSFL.com. 1st year revenue in excess of $40 million.
• Architected, built, deployed, operated, documented, and handed off highly successful automatic shipping program (BeSlim) which drove Confidential ’s unprecedented revenue increase during 2008 calendar year. Components of this system include public-facing web site for managing standing orders, automated email notifications at various points in the fulfillment cycle, software for placing and authorizing card payments for automated orders on a daily basis, reporting, and web-based admin tools.
• Worked with and oversaw numerous outside vendors during 2008 successful effort to overhaul web site, accounting system (Navision) integration, new payment gateway, and implementation of new network marketing commissioning engine. During this project, I worked in various capacities, including business analyst, dba, software engineer, deployment engineer, and project manager. I acted as ringleader for a bevy of outside consultants and internal employees to bring the project to fruition, despite a high turnover rate both internally and externally and repeated losses of key resources.
• Built, deployed, automated, operated, and handed off automatic transaction settlement program for credit card transactions which tied credit card settlements to fulfillment records.
• Designed and implemented QAS address verification system integration into shopping cart checkout to authenticate shipping addresses real time, resulting in a reduced rate of shipping returns.
• PCI-compliance

Confidential, Annapolis, MD

Software Engineer

Responsibilities:

• Installed and customized Confidential shopping cart and altered to include numerous business rules specific to Confidential ’s operations. Starting with Confidential ’s publications catalog, set up several separate shopping carts for different Confidential product offerings. Integrated with Confidential checkout.
• Built complex event registration system taking in several million dollars per year from 2002 to present (still in use but managed internally).
• Data collection key metrics
• Built subscription-based web sites for selling nationwide real estate (seniors housing) operating data to lenders, operators, and owners. Features include various web-based reporting/query tools, Google map integration with data overlays, Windows Live map API integration with data overlays, subscription management and tracking system.
• Preconference networking system.
• Extensive admin tools for online reporting and management of Confidential ’s large database of members, contacts, vendors, and contacts.

Confidential, Annapolis, MD

Software Engineer

Responsibilities:

• Provided consulting and programming services to boutique design and hosting firm.
• Built, deployed, and supported numerous web sites, ecommerce applications, and other assorted data-driven web applications on behalf of Take One clients.

Confidential, Annapolis, MD

Software Engineer

Responsibilities:

• Provided consulting and programming services to hosting firm.
• Built, deployed, and supported numerous data-driven web applications on behalf of SpinRX clients.

Confidential, Bowie, Maryland

Software Engineer

Responsibilities:

• Provided consulting and programming services to software firm.
• Built, deployed, and supported numerous data-driven web applications on behalf of Confidential clients.

Confidential, Philadelphia

Engineering Consultant

Responsibilities:

• Provided technical litigation support for cases involving environmental insurance claims.
• Worked with litigation databases using Concordance, Litigator’s Notebook, and other discovery management tools.
• Performed mathematical modeling of environmental contaminant transport processes, and other analyses to support client firms’ legal theories.