percy with coffee

Percy Wegmann full stack developer

Email: percy @at@ percywegmann.com
Linked In Profile http://www.percywegmann.com


what I do top

I design, build and deploy non-trivial software using the right tools, doing whatever it takes to make the project a success.

work top

using these technologies

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

bidtective.com Bidtective

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

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

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

ROME (now TriplePoint)

ROME supplied credit risk management software to Fortune 500 energy companies like ConocoPhillips Conoco Phillips and Tesoro 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

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

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

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

open source top

sqins

sqins makes type-safe SQL available inside Scala using SQL-like syntax.

jspos

JavaScript port of FastTag part of speech tagger.

Mwanzia

Easy JavaScript to Java remoting with full support for object-oriented programming.

bigtablesearch

Python full text indexing for Google App Engine.

gflow

The result of playing around with Google Go and trying to model stateless process flows.

education top

current interests top

Scala

Scala is Java done right. I'm particularly excited about its usefulness for building internal DSLs such as sqins.

fun top