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Ho-Yin YIP

MAISONS-ALFORT

En résumé

Mes compétences :
E-commerce
Ecommerce
J2EE
JAVA
Web
Websphere

Entreprises

  • Netik - Technical team leader

    2009 - maintenant SFR
    NEUFVOD, http://club-video.sfr.fr/

    October 2009 - Present

    Technical lead, performance, design and development focus of a Java/JEE based multi-tiered, high volume and distributed application.

    *** Achievements

    - Designed and implemented solution to support multi-device (Set-up box, iPhone, iPad, etc.)

    - Conducted WebSphere Commerce framework migration from V6 to V7 (J2EE to J5EE)

    - Migrated products' attribute model from an inefficient non-normalized schema to a normalized one which reduces considerably redundant data and improves loading speed by setting up procedure (PL/SQL scripts).

    - Leading code reviews and refactoring to improve maintainability and performance by applying design patterns, OO design concepts and best practices

    - Guided and mentored new recruits, motivated the team on best practices and encouraged to use key design patterns, such as façade, singleton, decorator, factory, etc.

    - Worked closely with SFR architect and DBA to fixe performance issues by tuning SQL statements and reviewing table indexes.

    - Produced detailed documents with design alternatives, pros and cons for each approach and reason(s) for the recommended approach.

    - Built and deployed ear files to WebSphere Application Server on a Unix box

    - Produced User-oriented documentation, maintenance and technical support.
  • Netik - Software engineer

    2009 - 2009 IBM
    LECLERC

    June 2009 – September 2009
    3 month assignment

    Design and development focus

    **** Achievements

    - In charge of customer data mass upload by customizing IBM Data load utility (Business Object Data Load) and setup scripting procedure to import 500,000+ users.

    - Conducted various back office UI customizations based on Openlaszlo.
  • Netik - Software engineer

    2009 - 2009 SFR

    NEUFVOD

    February 2009 – May 2009
    4 months

    Architecture, middleware upgrade, design and development focus


    **** Achievements

    - Assisted in WebSphere upgrade to handle multi-store business model (Extended sites).

    - Designed architectural solution to support multi-store and catalogue sharing.

    - Implemented back-office service based on Openlaszlo and Business Object Document Web service model.

    - Designed and developed REST web services
  • Netik - Software engineer

    2008 - 2009 CLARINS - THIERRY MUGLER

    September 2008 – February 2009
    6 months

    Design and Development focus


    **** Achievements

    - Contributing in application design and development

    - Developed custom tag libraries to retrieve data from a CMS (Magnolia).

    - Maintenance and technical support

    - Assisted in packaging and deployment process.
  • Netik - Software engineer

    2008 - 2008 WONDERBRA

    February 2008 – August 2008
    7 months

    Design, development and performance tuning focus


    **** Achievements

    - Designed and programmed various application units such as order process, custom promotions and secured transactions with PayPal via MD5 and RSA.

    - Maintenance and technical support.

    - Planned relevant test scenario an conducted stress tests with AppPerfect. Provided results report, suggested to refactor and re-design the entire server-side cache system which optimized the overall performance by up to 50%.

Formations

  • Institut National Des Télécommunications (Evry)

    Evry 2006 - 2008 Major: Network services developer

    Coursework (ECTS grade): Middleware for mobile, Pervasive and Ubiquitous Computing (B) -
    Middleware for Distributed Applications (A) -
    Semantic Web and Applications (A)


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