- Last updated : june 2012 - PDF version - Version française
Senior Web Infrastructure Architect / Engineer
15 years of Linux, Internet, technology expertise.

Design & operation of high volume/high availability Internet architectures ·

Consulting, training, technology & product advice ·

Excellent written and verbal communication skills. Native French, fluent English

Renaud Guérin
London, UK

Work experience

Sept 2011 - June 2012
(9 months)
Songkick (music start-up, London)
Senior Systems Engineer
  • Co-responsible for all aspects of the site's systems & infrastructure in a team of two.
  • Ubuntu, MySQL, Redis, Ruby on Rails environment, VMWare, puppet, Jenkins CI, git...
Feb. 2010 - Aug. 2011
(1.5 years)
Facebook (based in the London office)
Site Reliability Engineer / Production Engineer
  • Member of the SRE team, responsible for 24/7 stability and performance of the worldwide site infrastructure. Among my duties : troubleshoot system/network/application-level incidents, manage datacenter traffic balancing, build & maintain tools for cluster management and deployment, participate in on-call rota.
  • I then moved to the Production Engineer (formerly called App Operations) role for more long term project-based duties, participating in the design and implementation of architectures, automation and processes for major site applications and subsystems.
  • Linux, memcached, MySQL, cfengine, and many more in-house components.
Jul. - Dec. 2009
(6 months) (Paris)
Systems & network engineer
  • Part of the infrastructure team at France's original maps site, 13th french web destination, in a mixed Windows / Linux environment. I was the go-to person for Linux & networking matters.
  • Debian, Puppet, Cacti, Memcached, Windows Server, Cisco, Nortel, Zeus ZXTM, VMWare, NetApp, Bind, Apache, IIS, MySQL, SQL Server, Postfix...
2007 - 2009
(2.5 years)
Renaud Guerin Conseil (Paris)
Freelance consultant
  • Main client : Gum Prod (David Guetta & Joachim Garraud's music label, Paris). I revamped hosting and took charge of systems administration for and, their music podcasts (regularly at the top of iTunes Store France charts) and the "Invasion" on-demand CD store.
  • Other clients & projects: Network administration for Reed Expositions, Linux / TCP/IP training at Pythagore FD, Embedded software architecture consulting (multimedia set-top box project), emergency tuning of websites under sudden heavy traffic.
Mar. 2004 - Jun. 2007
(3+ years)
Linux systems engineer
  • Working on the main hosting platform (#1 ISP and 3rd french destination : day to day operations, systems administration, security & performance tuning, reporting & monitoring, architecture, design & capacity planning of new projects, on-call rota (1500+ servers).
  • Main achievement : architected & migrated the new customers home pages platform (Pages Perso Orange : 500,000 sites, several TBs of storage). Advanced software (DRBD) & hardware (HP) troubleshooting. Drastically improved performance and cut costs compared to the previous solution.
  • HP/IBM servers & storage, Debian, Redhat, Apache, high availability (LVS+Heartbeat+NFS+DRBD), iptables, cfengine, Windows 2003 Server, Cisco, Nortel ...
Sept. - Dec. 2003
(4 months)
Pythagore FD (IT training, Paris)
Freelance Linux / TCP/IP trainer
  • In charge of Linux and TCP/IP courses, mostly for audiences of UNIX/Windows/Mainframe systems professionals.
Jan. - Jun. 2003
(6 months)
Freebox (R&D dept. of Free / Iliad group, Paris)
R&D Software Engineer
  • Linux developer in the early team of the award-winning Freebox (DSL set-top box for France's #2 ISP
  • Optimized key parts of the embedded Linux distribution for size. Modified the DSL Sagem Fast 800 modem's kernel drivers for internal use.
  • C-based system-level development, custom Linux distribution, sockets/driver/kernel programming, busybox, uClibc ...
Feb. - Aug. 2002
(7 months)
INRIA (National Computer Science Research Institute, Sophia-Antipolis, France)
IP networks/QoS research intern
  • Within the PLANETE research team, evaluated the DiffServ framework for IP QoS and its suitability for deployment in a carrier-scale IP network.
  • Studied the state of the art for QoS algorithms (CBQ,WRR,RED,RIO...), and their implementation in networking equipment. Created custom C++ modules on the ns-2 network simulator. Gained insight with working in an academic research team together with industry partners.
  • Advanced TCP, NS-2 network simulator, C++, TCL, Valgrind, LateX.
Sept. 2000 - Feb. 2001
(6 months)
Alcove (Linux services, Saint-Denis, France)
Infrastructure software engineering intern
  • Developed and deployed a tailor-made system for automated installation and centralized management of Debian Linux workstations. First contacts with the local Debian developers community here.
  • C, Shell, Perl, advanced Debian, cfengine.
2000 - mid-2002
(2+ years)
Linux Systems Administrator (part time student job)
  • Main initative : students server project (home page hosting, yearbook and online services for 1500+ users). Designed and operated the infrastructure (LAMP / Samba).
  • Linux, DEC Unix, Squid, PAM, Samba, Apache, MySQL ...
Apr. - Jun. 1999
(2 months)
Hexanet (regional ISP, Reims, France)
LAMP developer (internship)
  • Developed a LAMP-based CRM application. Researched IP firewall and bandwidth management solutions on FreeBSD.
  • Linux, FreeBSD, Firewall, ipfw, Apache, MySQL, PHP.
Jun. - Aug. 1998
(3 months)
ThyssenKrupp (Reims, France)
Freelance developer
  • Proposed and built a LAMP-based sales application, a first early opportunity to consult for end users.
  • Linux, Apache, MySQL, PHP.


1999 - 2002
Graduated from Université de Technologie de Troyes, France (UTT)
1997 - 1999
"DUT Informatique" (2 year CS degree) at University of Reims, France.
Specialized in digital image processing. Best student in 1st year.



Operating systems

Web infrastructure

Software engineering


View Renaud Guerin's profile on LinkedIn Retrouvez moi sur