ppl

phvJASON STELZER

532 Arbor Rd, Cheltenham, PA 19012(484) 431-5866;

phv

• Health Market Science--King of Prussia, PA
  Software Developer/Technical Lead: July 2003-present
  
  
  • Developed algorithms to automate the standardization, matching, and integration of 5,000 incoming data sources representing 20 MM unique entities across 4 TB of data. Software used a custom distributed processing engine to implement fuzzy matching algorithms that ranged from simplistic fuzzy matching (e.g. Levenshtein edit distance) to complex multi-step criteria.

    
    

  • Created clustered application to create an address standardization/geocoding service as a centralized service for core HMS applications.

    
    

  • Created and designed software to facilitate moving from a large, legacy code base to a more granular SOA architecture composed of loosely coupled applications such that components could be reused and shared across applications.

    
    

  • Created documentation and tutorials to assist in training new employees and share expertise with existing staff.

    
    

  • Designed and developed J2EE applications to augment our core Reference Data projects and custom solutions for clients needing assistance assimilating our data.

    
    

  • Designed and developed the infrastructure for integrating our legacy systems with our J2EE systems via Inline perl extensions as well as shared libraries written in C/C++ that called into the J2EE stack via IIOP.

    
    

  • Created web services layer to facilitate interoperability between different technology stacks (ruby, java, perl).

    
    

  • Oversaw development for initial install of HMS DataPump software at vendor data center on vendor architecture.

    
    

  • Utilized multiple languages (ruby, clojure, perl) to prototype applications and explore the feasibility of various applications.

    
    

  • Developer on project for creating a distributed proxy network implemented in php, perl, java and C.

    
    

  • Created java plugins for jboss so that active directory users could authenticate with our applications as part of a single sign on strategy.

  
  

• The Sycamore Group--Fort Washington, PA
  Unix Administrator/Software Developer: November 1999 - June 2003
  
  
  • Administered Unix (Sun Solaris) and Linux (Red Hat) servers

    
    

  • Created B2B web application

    
    

  • Primary software architect and lead developer for VWR Scientific Products ecommerce project developed in OO Perl as well as integrating with internal java systems and partner web sites.

    
    

  • Designed and implemented application for the design of custom DNA strands (oligos/fretprobes/peptides) that integrated with the ecommerce site for ordering. This was integrated into the b2b site via SOAP.

    
    

  • Created and executed plan to load test and subsequently tune Netscape Application Server cluster for IBN (Investor Broadcast Network). System was subsequently able to scale from a hard limit of a few hundred simultaneous clients to thousands. Tuning effectively removed existing bottlenecks and allowed the same hardware to scale to entirely utilize available bandwidth.

    
    

  • Designed and implemented a single-sign on solution for account management and replication for all internal users and developers for The Sycamore Group Included the installation and configuration of an LDAP directory, the design and development of web-based administration interfaces. System allowed for single source management of Unix and Windows accounts and security. Included the integration of corporate mail and group discussion system.

  
  

• SN.com--Rosemont, PA
  Unix Administrator: 1998-1999
  
  
  • Configured/Maintained servers

    
    

  • Administered core application services (dns, mail, http, ldap)

    
    

  • Planned capacity, ensured fault tolerance

  
  

• Vertical Net--Willow Grove, PA
  Unix Administrator: 1997-1998
  
  
  • performed systems monitoring

    
    

  • configured core unix services and managed accounts

phv

• Operating Systems: Linux (Gentoo, Red Hat, and Debian), Mac OS X, UNIX (several variants), Windows 98/2000/XP/7

  
  

• Computer Languages:
  
  
  
  • Proficient in Java, Perl, C, C++, UNIX Shells

    
    

  • Familiar with L^ATEX, Clojure, Ruby, Python, Objective-c

  
  

• Tools and Systems:
  
  
  
  • Proficient in Apache, BIND, CVS/RCS, SVN, Git, Jboss (4.x), MySQL, Maven, Make, GnuPG, SSHD, VI, Emacs, NFS, Eclipse

    
    

  • Familiar with Kerberos, NFS, OpenLDAP, OpenSSL, Postfix, Samba

phv/Hobbies

• Computer security and cryptography. Created an OS X gui for gaining access to servers via portknocking for less technical people (specifically, my wife).

  
  

• Cloud computing (have AWS account as well as GAE), have prototyped basic applications and evaluated leveraging the virtual hardware to assist in tasks where we lack infrastructure on hand.

  
  

• Iphone and OS X development.