Sami DJEFFAL

Sami DJEFFAL

Chief Information Officier

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sami@djeffal.com

Nationality : French

Age : 39

  • FR - EN

  • Profile

    A highly skilled system architect and system engineer specialist, with 15 plus years of progressive leadership in a challenging environnement, capable of resolving multiple and complex issues. Strong qualifications in linux administration, open source applications, incident and team management. During my career i was able to drive critical projects with high added value. My profile combines expertise in advanced technologies, technical project management scope and team management.

    Work Experience

    OutsourceTHINK.(By AdThink)

    Chief Executive Officier

    2016 - Today


    • Study, conception and development of an outsourced server management solution,
    • Business development,
    • UX writing and content design of the website.

    Chief Information Officier

    AdThink Group.

    2007 - Today

    ADTHINK - A major player of pubishing and internet advertising, up to 150 employees, 1000 servers.

    Main Figures :


    • Adaccess : 120 million advertisment views per day,
    • Big : 30 To of compressed datas, up to 15 Million cookie set per day,
    • Mailkitchen : Up to 2 million emails sent per day.

    Duties and responsibilities :


    • Recruiting and managing a team of five engineers,
    • Project management in high-stakes environments with high technical constraints (with up to 10 collaborators in each project)
    • Driving meetings and defining roadmaps,
    • Designing System's architectures,
    • Optimizing budgets and production time,
    • Writing technical documents : Roadmap, Specifications, Disaster Recovery Plan, Business Continuity Plan,
    • Defining and implementing best practices,
    • Deploying and training internal users with email best practices,
    • Managing over a thousand servers.

    Projects and achievements :


    • Designing and implementing complex systems and servers architectures in order to meet the different requirements of scalability, availability and performance of the Group's projects,
    • Managed the implementation of Real-time bidding architecture, (http://www.advertstream.com/en)
    • Deployed a centralised and automation system using Puppet (805 nodes) (Workflow : Git, Jenkins, Puppet lint, PuppetBoard),
    • Conducted and implemented a BIG DATA server infrastructure using Hadoop,(https://big.exchange)
    • Directed the establishment of a centralised logging solution with Graylog and elasticseach, (3000 messages per second)
    • Designed and implemented various NoSQL databases respecting the technical requirements specifications,
    • Standardisation work on PCI DSS standard for the electronic banking platform,
    • Engineering, designing and implementing the server architecture generating and sending millions of emails per day,(http://www.mailkitchen.com)
    • Migration from Linux Virtual Server to Haproxy,
    • Advanced system Tuning (OS, Apache, MySQL, Postfix etc...).

    Linux System Engineer

    Advertstream

    2005 - 2007


    • Conceived and deployed the Adserver architecture,
    • Implemented a load balancing system using Linux Virtual Server,
    • Research and development of the MySQL Cluster solution,
    • Set up a monitoring system using Cacti,
    • Designed and implemented high availability architectures,
    • Automated servers installation with Kickstart,
    • Set up a virtualisation solution.

    Skills

    Databases and Web Servers

    • Hadoop
    • Hbase
    • Redis
    • MongoDB Cluster
    • Sphinx
    • MySQL
    • TokuDB
    • Percona XtraDB
    • ElasticSearch
    • Memcached
    • Apache - phpfpm
    • Lighttpd
    • Nginx

    Programming

    • Bash
    • Python
    • Php

    Monitoring

    • Centreon / Nagios
    • Cacti
    • Business Intelligence
    • Capacity Planning
    • Sms and EMail alerts
    • Business Monitoring

    Network

    • Haproxy
    • Linux Virtual Server
    • Wireshark
    • TcpDump
    • Varnish
    • Twemproxy
    • Iptables

    High Availability

    • DRBD
    • Pacemaker/Corosync
    • Cluster
    • Raid

    Virtualisation

    • VmWare
    • Lxc
    • Kvm

    Various

    • Puppet
    • Graylog
    • OBS
    • Git
    • GlusterFS
    • Percona ToolKit

    Systems

    • CentOS
    • RedHat
    • Debian

    Languages

    • French : Native
    • English : Fluent
    • Arabic : Fluent
    • Japanese : Beginner

    Education

    Management expertise training : Savoir Motiver - Déléguer et Responsabiliser - Manager son équipe

    2014 - 2015 EMLYON Business School


    Master's Degree in Engineering Level 5 : Organisation et Protection des Systèmes d'Information de l'Entreprise (With honours)

    2004 - 2005 Lyon II Lumière University

    Cisco Certified Network Engineers (CCNE)


    Master's Degree : Master en Informatique Appliqué

    2003 - 2004 Science-U University


    Three-year university degree : Certificat Supérieur en Informatique Appliqué

    2002 - 2003 Science-U University


    BTEC Higher National Diploma : BTS Informatique de gestion

    2000 - 2002 Science-U University


    Interests


    • Play with opensource applications,
    • Chess,
    • Travelling : Travelled all over Asia and Europe,
    • Drawing.

    Sami Djeffal — sami@djeffal.com — (+33) 7 77 25 88 19