Percy Wegmann - full stack developer

Network Security Startup

Our software enables customers to capture and correlate streams of telemetry from network devices and logs in order to identify and react to developing and persistent threats on their network.

Role

Senior Developer 2012-present

Contributions

Design and implement SVG-based visualizations of network security data
Envisioned, designed, implemented, performance tested and tuned data warehouse for ad-hoc OLAP analysis on streams of network security data

Languages: Python, Java 6, JavaScript, SVG, (X)HTML 4 + CSS + AJAX, SQL, PHP
Libraries: D3.js, ZeroMQ, Jython
Database: PostgreSQL 9.1

GoalMine.com

This website enables customers to easily buy and share mutual funds through a secure website, mobile applications and gift cards. I worked with our CTO to prepare the site for its initial launch and subsequently maintained and enhanced the site.

Role

Lead Developer 2010-2012

Contributions

Full-stack development in browser, Tomcat and JBoss Application Server
Design and build of rich domain model for customer registration, account tracking and e-commerce
Fully integrated accounting using off-the-shelf stock transfer agent software
Online gift card purchasing via credit card
Gift card delivery via Facebook wall post, email and postal mail
Social sharing features integrated securely into customer account center
Android and iPhone applications featuring location-based savings reminders
Various marketing sites with some syndication to main site
Basic IVR for customer self-service
Real-time online customer identify verification
Download of pdf statements and documents
Engine for hosting configurable incentive programs
Java-based batch jobs for asynchronous processing
Published SOAP API for consumption by partners
Custom testing application for automated, integrated browser and back-end testing using Selenium WebDriver, Java, Groovy and Excel
Self-service reporting system using SQL Server Reporting Services
Inmon-style data warehouse fed by custom ETL jobs and implemented using an OLAP cube in SQL Server Analysis Services
Refactored the application architecture to allow the application to run outside of JBoss, drastically speeding up development cycle time

Languages: Java 6, JavaScript, Groovy, (X)HTML 4 + CSS + AJAX, Transact-SQL, PHP, XPath
Libraries: Hibernate ORM (JPA), Struts 2, jQuery, Selenium WebDriver, POI for Excel, JavaMail, JUnit, easyXDM, JBossWS, Freemarker, JSP, JAXB, XMLBeans
Deploy Platforms: Tomcat 6, JBoss 4, Apache HTTP Server, WordPress, Solaris OS, Windows Server
Mobile Platforms: Android 2.1, Appcelerator Titanium (for iOS)
Database: SQL Server 2008, SQL Server Analysis Services, SQL Server Reporting Services
Cloud APIs: Facebook, ZenDesk REST API, CloudSponge, SocialTwist, Experian Precise ID, EVS, FirstData LinkPoint, Google Analytics, flickr
Protocols: HTTP, REST, JSON, SOAP, SMTP
Dev. Environment: Eclipse, JRebel, Ant, OS X

bidtective.com

Bidtective allowed customers to comparison shop for local services online. Bidtective featured an instant estimator that used statistical models to provide detailed price estimates for custom services like wedding photography. Bidtective is no longer active - watch this video overview to see how it worked.

Role

President 2009-now

Contributions

Founded business
Developed business plan
Designed and developed an initial concept around social sharing of project experiences, including cost, vendor recommendations, etc.
Pivoted early on and built a new concept centered around the instant estimator technology
Handled all aspects of business, including bookkeeping, marketing/SEO, web design, application development, data collection and statistical analysis, deployment and operations, etc.
Built and open sourced bigtablesearch, a search engine for use on Google AppEngine

Languages: Python, JavaScript, Groovy, (X)HTML 4
Libraries: Django, jQuery, Grails, Beautiful Soup
Deploy Platforms: Google AppEngine, Amazon EC2, Amazon EBS
Database: AppEngine Datastore, PostgreSQL
Cloud APIs: Chase Paymentech

Rêv Worldwide

Company provides innovative payment solutions to the underbanked.

Role

Senior Developer 2008-2009

Contributions

Ported Python-based SMS mobile payments application to Java
Defined grammar and implemented parser supporting automated processing of SMS messages
Built distributed, fault-tolerant object-oriented application framework that serves as the basis of most applications now developed by REV
Built thick client GUI tool for risk management professionals
Developed custom, fault-tolerant document repository

Languages: Java 6, Python
Libraries: Hibernate ORM, JavaCC, Swing, JNLP
Deploy Platforms: JBoss 4, Apache HTTP Server, Solaris OS
Mobile Platforms: Kannel SMS Gateway
Database: Oracle 10g
Protocols: HTTP, REST, SOAP, RMI, EJB
Dev. Environment: Eclipse, IntelliJIDEA, Ant, Windows XP, Cygwin

DFS Online Account Management

Dell Financial Services issues credit to Dell customers. Worked as part of a Razorfish team that designed and built the self-service website for home and small business customers on top of Dell's existing issuing and servicing platforms. The project was highlighted in this presentation at Mix 2009.

Role

Technical Architect 2007-2008

Contributions

Led a team of 4 developers
Estimated and planned work
Established architecture for self-service website
Implemented content management system for related static site
Created stubs for proposed web services that allowed us to build a fully functional website before the final web-services became available
Employed aspect-oriented programming to address cross-cutting concerns like security and logging
Performed strategic assessment of existing infrastructure and developed recommendations for technical improvements to reduce friction during checkout process
Provided career mentoring to developers
Assisted with RFP responses

Languages: C#, JavaScript, (X)HTML 4
Libraries: ASP.NET, WCF, PostSharp AOP, Bamboo Prevalence
Deploy Platforms: Microsoft Office Sharepoint Server 2007, IIS, Windows Server
Protocols: SOAP
Dev. Environment: Visual Studio

ROME (now TriplePoint)

ROME supplied credit risk management software to Fortune 500 energy companies like ConocoPhillips and Tesoro , as well as public utilities and regulators such as ERCOT. ROME was acquired by TriplePoint in July of 2008.

Role

Solutions Engineer 2005-2007

Contributions

Completed RFI and RFP responses
Demoed software to prospective clients
Maintained Java-based credit risk software
Ported acquired operational risk software from Tapestry to Wicket

Languages: Java 5, JavaScript, (X)HTML 4, Transact-SQL
Libraries: Hibernate ORM, Spring Framework, JUnit, Tapestry, Wicket, AspectJ
Deploy Platforms: Tomcat, JBoss, WebLogic, GNU/Linux
Database: SQL Server 2000, BIRT

California Child Support Automation System (CCSAS)

CCSAS combines statewide case management capabilities with centralized child support collection and payment processing. I worked on an Accenture team as part of the consortium that developed the system on behalf of the State of California. I started work on the batch architecture team and ended up as architecture development lead overseeing the 3 teams responsible for document management, business process management, security, online and integration architecture

Role

Architecture Development Lead, Developer 2004-2005

Contributions

Estimated, planned and tracked team's work on documentation and software work products
Interviewed new hire, internal hire and contractor candidates
Provided organized and informal training to team members and client staff
Oversaw development of electronic and paper forms
Oversaw development of document management system
Oversaw prototyping of business process management capabilities
Built Java batch processing infrastructure using Ant to script batch jobs (analogous to JCL) and integrated with Tivoli Workload Scheduler for job scheduling

Languages: Java 5, SQL
Deploy Platforms: WebSphere, AIX
Database: DB2

Large Internet Service Provider

Worked on an Accenture team delivering a highly customized PeopleSoft CRM 8.8 system for 4,000 users supporting a customer base of 3 million DSL and dial-up customers.

Role

Technical Architect 2003-2004

Contributions

Prepared architecture blueprints for development, testing, production and disaster recovery environments
Developed build schedule, coordinated with off-site infrastructure team to ensure environment availability and helped coordinate an upgrade to PeopleSoft CRM 8.8 Service Pack 1.
Documented standards for synchronous and asynchronous integration with legacy systems

Deploy Platforms: PeopleSoft CRM 8.8, AIX

Consortium of Large Telecommunications Companies

Worked on an Accenture team that delivered a custom billing system to meet requirements by the State of California, including bill generation, mail delivery of bills, online bill presentment and an internal system for accounts receivable handling and billing dispute resolution.

Role

Lead Developer, Developer 2000-2003

Contributions

Estimated, planned and supervised work for teams up to 10 developers
Built self-service and customer-care websites using a proprietary MVC framework
Developed services tier using EJB
Developed persistence layer using TopLink
Developed Swing-based applet for managing complex billing account hierarchy
Developed reporting framework based on JDBC and PL/SQL for operational and program monitoring
Supervised implementation of electronic bill presentment, including adding support for pagination of large bills (some bills were thousands of pages in length)
Coordinated upgrade from WebLogic 5.1 to 6.1
Planned and supervised performance testing
Worked directly with client to gather requirements, obtain sign-off on designs and validate product with user-acceptance testing
Maintained accounts receivable, invoicing and reporting batch jobs

Languages: Java 1.4, COBOL
Libraries: TopLink ORM, Swing
Deploy Platforms: WebLogic, Solaris OS
Database: Oracle 8i
Testing: OpenSTA, JProbe

Hubbard One

Hubbard One builds internet and intranet sites for law firms. I worked here while in college implementing data-driven web solutions for national law firms using HTML, JavaScript, Active Server Pages and Visual Basic.

Role: Web Developer 1999-2000

Languages: Visual Basic, Active Server Pages

Other College and High School Jobs

University of Chicago 1998-1999: Computing assistant at the Graduate School of Business computing labs
Round Table Group 1998: Recruiting intern
Fru-Con Engineering: IT operations intern