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Chi-Fai WuCW

Chi-Fai Wu

Expert SI optimization - processing time

€750/day
Châtillon, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Chi-Fai

Computer Engineer Consultant Database Expert

Information System Performance,
production plan
Expert processing time, batch and transactional

Interface between Business and IT

Synthesis and adaptation skills

Operational English
  • English

    Fluent

  • German

    Basic

  • French

    Native or bilingual

Can work on-site
Châtillon (up to 50km)

Experience

  • Solystic
    Data Expert
    MECHANICAL ENGINEERING
    November 2019 - Today (6 years and 7 months)
    Bagneux, France
    BowTie Project: piloting sorting machines for BPOST, the Belgian Post.
    Optimization of data update processes "Mail delivery point", evolution of sorting plans (PL/SQL) in order to reduce the number of distribution routes.
    Oracle PL/SQL shell
  • Medsteer
    DATA Expert
    MEDICAL
    March 2016 - Today (10 years and 3 months)
    Suresnes, France
    AnesLoop Project: computer-assisted anesthesia. To differentiate from new competition, development of statistics for the general public and investigators, highlighting over 10 years of experience.
    Data analysis (over 300 million measurements)
    mySQL shell html PHP
  • Axiem
    Information System Performance Expert
    DIGITAL AND IT
    January 2003 - January 2007 (4 years)
    Development of the "SI Process Optimization" service offering for the ALTRAN group. Analyzing malfunctions to provide a quick diagnosis and propose corrective recommendations.
    Optimization:
    • FRANFINANCE - Optimization of the consumer credit product for Ukraine
    o noGo => Go (application not supporting more than 200 simultaneous transactions)
    • SFR (Development of traffic monitoring and fraud detection analysis tools)
    • CEGEDIM - JAVA Application
    o Processing "health card" transactions: each week's accumulated delay was absorbed over the weekend until the weekend was no longer sufficient
     Processing of invoices by payment center
    • Operation cost: 10 man-days
    • Processing from 1 to over 150 invoices/s
    • BestOfMicro – Online e-commerce sites
    o Updating the price catalog for about a hundred e-commerce sites
     Global processing of sites instead of site-by-site processing
    • Operation cost: 10 man-days
    • Processing from 8h to less than 1h
    • CASDEN - Transactional credit simulation application
    o Optimization of calculation time
     Deletion of a view consisting of 55 queries, systematically queried
     Reduction of disk sorts by changing Oracle parameters
    • 5 minutes => a few tens of seconds
    • TDF - Elimination of the bottleneck by redistributing tasks
    • CARDIF - Data consolidation application
    o Optimization of processing time
     Merging of two partially redundant databases
    • Operation cost: 10 man-days
    • Processing reduced by 50%
    Database Assistance: CASDEN, DANONE
    Data Migration Assistance:
    • CREDIPAR
    • FRANCE-TELECOM: data migration from 21 to 9 days (Estimation ASCADE, software publisher)
    Oracle SQL Perl Java

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Education

  • Engineer
    ESSTIN
    1985
    cybernétique / maintenance
  • DESS
    Nancy II
    1985
    Génie biologique et médical

Certifications

  • Data Science
    Université Paris Dauphine
    2018

Skill set (18)

Categories