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Last updated: August 1, 2015

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  1. Mariusz Z.

    Mariusz Z.

    Penetration Tester, Linux/UNIX Security Admin,Intrusion Analyst, CISSP

    Poland - Tests: 9 - Portfolio: 1

    I'm Linux Security Administrator & Web Application Penetration Tester with 8 years of experience in the IT field. I'm CISSP (ID# 478556) and OWASP member. My expertise ranges from designing, building secure & robust systems to analysis of subtle software security flaws. I can help you with: - thoroughly security testing your web application (black-box and/or white-box tests) and helping in mitigating detected vulnerabilities - analyzing and assessing vulnerabilities in your application's underlying IT infrastructure - security hardening Linux/UNIX servers/clusters - recommending solutions and best practices on how to design and maintain secure AWS infrastructures - responding to security incident in Linux/UNIX environment, helping in recovery process (rootkit detection, malware removal, etc.)

    $19.00 /hr
    123 hours
  2. Philipp J.

    Philipp J.

    Linux expert with 10 years experience, Devops, Ruby, Python

    Germany - Tests: 6 - Portfolio: 1

    I'm a 29 year old freelancer from germany with a long experience working with linux (job and hobby). Knowledge: - Linux - BASH scripting - continous integration (Jenkins) - continous deployment - configuration management (saltstack, bcfg2, chef, puppet) - linux package managers (rpm/deb) - Python / Django - Ruby / ROR - apache / nginx - networking - working in agile teams (SCRUM) - project management I also offer personalized managed hosting for your services, setting up the environment, taking care of security patches and keep everything monitored. All without long term contracts etc. if you don't want to. Inform me what you need and we decide together where to host and what to do. You won't regret choosing me! If we work together I will be available by email, skype or telephone.

    $16.67 /hr
    3 hours
  3. Miltan C.

    Miltan C.

    PHP Architect Expert in LAMP, CI, MongoDB, Node.JS, ZF2, Doctrine2

    India - Tests: 3 - Portfolio: 3

    Development Experience : 8+ years Key Skills: PHP, ZF2, Doctrine ORM, CakePHP, Symphony, Yii, CodeIgniter. Python, Django, Node.JS , Backbone JS, Angular JS, Jquery. Wordpress, Joomla, Drupal, Magento DBMS : RDBMS (MySQL) and NoSQL (MongoDB, CouchDB) Web servers : Apache, Nginx OS : Linux, Windows (Can efficiently configure Remote Linux systems using putty) Amazon AWS and Rackspace Cloud Server management. PhoneGap, Native Android app development Twitter bootstrap, Zurb foundation CSS REST and SOAP API (JSON and/or xml data) development. Payment gateway API integration. Facebook, Twitter and other Social API integration. Script development. I am a Goal oriented and focused programming professional. I Have worked 5+ years as team leader and technical analyst. A real internet savvy guy, who is very well aware of most recent developments in technology and e-business.

    $16.67 /hr
    497 hours
  4. Duminda Karunaratne

    Duminda Karunaratne

    System Administrator

    Sri Lanka - Tests: 3 - Portfolio: 1

    I am the member of the MIS team and covering all release managements and server operations. I currently handle ESXi and ESX server farm in Australia and USA. • Have experience installing, maintaining and troubleshooting VMWare servers.  ESXi and ESX Vsphere servers.  Installing, maintaining iSCSI software. (OpeanFiler / OPEN-E / HP LeftHand) • Have experience installing, maintaining and troubleshooting MS Windows Server 2008 and 2003.  Installing, maintaining and troubleshooting domain controller.  Have experience in Active Directory maintaining and troubleshooting.  Customizing Group Policies.  Scheduling Backups.  Domain Replications.  DFS Replications.  Installing, maintaining and troubleshooting IIS 7 and 6.  DHCP Server installation, maintaining. • Have experience installing, maintaining and troubleshooting MS Office SharePoint Server 2007 and 2010. • Have experience installing, maintaining and troubleshooting MS Exchange server 2010. • Have experience installing, maintaining and troubleshooting following software firewalls.  MS ISA Server 2006.  Untangle (Open Source)  SmoothWall (Open Source) • Have experience installing, maintaining and troubleshooting PLESK control panel and Cpanel. • Have experience installing, maintaining and troubleshooting UBUNTU/ CentOS / RedHat / SUSE Linux / Sun Solaris servers.  Installing Apache Server, Virtual hosting, Apache SSH configurations and Apache failover clustering.  Installing MySQL Server, MySQL data base replication and failover cluster.  Installing FileZilla FTP Server  Scheduling cron jobs.  ISC DHCP failover clustering. • Have experience installing Windows 7, Windows XP, UBUNTU, KUBUTU, and Fedora. • Have experience working with Amazon cloud computing and Soft Layer cloud computing. • Have experience in installing, maintaining and troubleshooting wireless network. • Can maintain and troubleshoot LAN environment. • Have experience installing MS SQL 2008 and 2005 servers. I’m maintaining daily backups in MS SQL servers and database management. • Have Experience installing and maintaining CISCO ASA 5505 Firewall, CISCO Routers and CISCO Switches.  Routing Protocol RIP, IGRP, RIP v2, EIGRP, OSPF  Creating Vlan  Nating  Creating VPN

    $16.67 /hr
    531 hours
  5. Ara Sadoyan

    Ara Sadoyan Agency Contractor

    Linux, Hadoop, Clustering and Cloud Computing expert

    Armenia - Tests: 5 - Portfolio: 4

    I'm 12 years experienced Linux Administrator. I'm professional in: Design, planning and deployment of Hadoop clusters, high available Linux web farms, NoSQL clusters (Riak, Cassandra, Couchbase, CouchDB). Design and deployments of public/private cloud infrastructures. Linux Networking & Security Concepts. Design, deployment and administration of multi node web farms. Linux Clustering and H-A ,Service level load balancing and clustering Linux services (WEB,MAIL,PROXY,DNS,LDAP,SAMBA etc) OS security concepts, Monitoring tools (Nagios, Munin, Ossec, SNMP etc) Bash scripting MySQL Administration, Server optimization Configuration and optimization of JVM`s and Java Application Servers Virtualization solutions (VMWare, XEN, CITRIX etc) And more !

    Associated with: NetAngelS

    $33.33 /hr
    3,510 hours
  6. Vsevolod Z.

    Vsevolod Z.

    Python developer, Infrastructure Expert

    Ukraine - Tests: 7 - Portfolio: 2

    Computer Science Master, since 2000 successfully held positions of * Web Applications architect, Python developer and security expert; * Chief Technology Officer (CTO), * Chief Information Security Officer (CISO), * IT manager; System analyst, Solutions architect, Advisor; * UNIX systems and networks engineer (16 years of experience); Specialties Networks architect (MPLS, VLAN, internal routing protocols, BGP), UNIX OS family, Juniper/Cisco network equipment, Firewall, Network and software security (covering Payment Card Industry Data Security Standard), Network services monitoring, Backup solutions, LAMP/FAMP/BAMP/LNMP/FNMP/EBLAMP/XAMPP/XNMPP servers, Database administration, DNS, MTA, Software development, Web applications, Cloud computing, Virtualization, Load balancing and High availability clusters solutions. Practically experienced in programming (since 1993). Good knowledge of the common programming languages: C, PHP, PERL, Python, Javascript, SQL. Familiar with OOP (object-oriented programming), general theory of programming (can quickly learn any new programming language).

    $50.00 /hr
    742 hours
  7. Steven Stovall

    Steven Stovall

    DevOps, Cloud (AWS/Google), Security. Development: Rails/Python/PHP

    United States - Tests: 2

    I enjoy solving challenging problems and utilizing technology to creatively design efficient, cost-effective solutions to meet business needs. Current Certifications: CISSP, CCNP, Net+/Sec+, MCP Cloud (AWS/Rackspace), Linux, Windows, VMware HA/vMotion/vCenter Open Source Software: Apache, nginx, Redis, elasticsearch, Zabbix, Logstash Information Security Auditing, Configuration, Policy Networking: Visio Diagrams, IPSEC/SSL VPNs, OSPF/EIGRP/BGP, Adaptive Security Appliances (ASAs), Wireless Controllers, F5 LTM, WiFi (RF Design) Information Security: Visio Diagrams (architecture), PCI DSS compliance, Splunk (syslog) Vulnerability Audit and Penetration Testing: Metasploit, Nexpose, Nessus, Vulnerability Reporting, Patch Management Development: Ruby/Rails, Git, Python, PHP, Perl, PowerShell, Bash, .NET

    $60.00 /hr
    48 hours
  8. Sysop X.

    Sysop X.

    Linux,Unix,Amazon EC2 (AWS),Load Balancing,High Availability

    Pakistan - Tests: 9

    Working with Linux/Unix system for more than 10 years. During this time I have designed, managed and secured various Linux based systems for my clients. Projects involving Web servers, Proxy servers, DNS servers, Database servers, Cpanel/WHM, Firewalls, App servers, Shell Scripting and Automation, Virtualization, Load balancing, High Availability, Cloud computing, Amazon AWS and overall system Security. I have also worked with various Embedded Devices, designed Linux based OS for such devices and Reverse Engineered protocols and communications. ==== Skills ==== ## Operating Systems : RHEL, CentOS, FreeBSD, ubuntu, Debain, SUSE etc ## Linux/Unix Servers : Dedicated,Virtual Dedicated(VPS),Shared Hosting ## Cloud Infrastructure Setups: EC2, Rackspace, Eucalyptus, Nimbula, CloudStack, OpenStack ## Cloud Management Setups: scalr, rightscale, enstratus ## Virtualization Setups: XenServer, Vmware, RHEV, VirtualBox, KVM ## Server Migration: cPanel, Plesk, Webmin/Virtualmin, Wordpress, Drupal, Magento, Joomla ## Network Storage: NAS, SAN ## Network File Systems: NFS, GFS, GlusterFS, AFP, SMB, Amazon S3 ## Redundant Storage: Hardware and Software RAID ## Service Optimization: apache, nginx, MySQL ## Monitoring Setups: BB, MRTG, Nagios, monit, munin, cacti, zabbix, zenoss ## Automation: Standard and Custom Backup solutions and other shell scripting. ## HA & FailOver: Database, DNS and WebServer Clustering/Replication and Content Distribution (CDN) ## Email Setup: Mass Mailing, Spam Filtering, DKIM, SPF, SenderID, Amazon SES ## Network/Server Security: Authetication, Firewall, IDS/IPS, AntiVirus/AntiMalware, DMZ, VPN, Amazon VPC, Logging ## System Hardening: Kernel/Software Patches, upgrades, unix permissions and user access control, file integrity solutions etc ## Security Compliance: PCI, GLBA, HIPPA ## Incident Response: Dis-infection from rootkits, viruses, worms, trojans and other malware.

    $33.33 /hr
    20 hours
  9. Manoj Sonawane

    Manoj Sonawane

    Expert Linux, Unix sysadmin,devops

    India - Tests: 1

    Hello, I am an experienced programmer & system Administrator with expertise in high performance system infrastructure, customized deployment solutions, configuration management, monitoring, python , Django development, REST based backend systems and related infrastructure support. I am in process of becoming Official Amazon Provider Network Member - Consulting Partner []. Highlights: 1. Created an infrastructure with over 4000 servers (physical as well as cloud servers aws, rackspace and go grid) distributed in 4 regions , implemented monitoring, ha, replication, configuration management. Recruited a team of 3 sys admin's , trained them and supported platform 24/7 with 3 engineers. 2. Have worked with several technologies and scaled it for high volume with massive cost savings. 3. Created a unified platform to interact with multiple public clouds. ( aws, go grid , rackspace with custom python based system) 4. Designed a geo-distributed, full tolerant with a SLA of 99.99999 deployment and deployed it using Amazon Cloud, Rackspace Cloud,gofrid cloud and on physical servers 5. Designed a scalable storage system using open source and commodity hardware. I have managed large (4000+) servers for my employers and clients, which include GE, Wipro, Lehman Brothers & Glam Media. I have managed IT security for GE and banking sectors (built a DC and developer shop for Lehman brothers in china). I now offer remote system management consultancy and training services. I have attached my linked in profile and references if you need them. I have designed, developed and maintained large scaling, load-balanced and redundant infrastructure for many clients. Most of the infrastructure I have designed are, • fully automated (saltstack/puppet and deployment via various code deployment tools integrated with git or subversion) • auto-scale (on demand scaling) • auto-heal and auto curate • fully load-balanced • in required cases geo-distributed • Monitored with custom performance plugins, logstash, nagios, check_mk, zenoss This infrastructure architecture and deployments were in different environments • Dedicated servers at various isps • Virtualized Environment (Xen, KVM, VMware and others) • Public cloud: Amazon, Rackspace, GoGrid, and others • Private Cloud:= openstack • Different Business Verticals, • Ecommerce • Social Application ( ) • Big Data Analysis and Analytics • Media (audio and video) • Online Advertising • Banking, • BPO / KPO Web Servers (Apache, lighttpd, Nginx, Cherokee) Load Balancers (HAProxy, Nginx, Pound, LVS, balance, Varnish, Zeus Load Balancer) Ruby on Rails (Phusion Passenger, Unicorn) Python (mod_python, uWSGI, gunicorn) Java (Tomcat, Glassfish, Jetty, Jboss) Database/DataStores (Mysql + variants, Postgresql, Oracle, Mongodb, Memcached, Redis, Riak, Membase/CouchDB, nd others) Data Analysis (Hadoop, Bigdata) Distributed File System (Glusterfs, Coda, Ceph, pVFS, Lustre, ZFS, OneFS, XtreemFS) Search (Solr, Lucene, Nutch, ElasticSearch, Lily, Katta) Caching (varnish, memcache, flashcache) Monitoring (Nagios, Munin, Icinga, Ganglia, cacti, ntop, op5, Zabbix, pandoraFMS, OpsView and others) DNS (bind, tinydns,) Mail (postfix/sendmail/qmail/exim, Dovecot/Courier) Security (Snort, Splunk, Samhain, OSSEC, OSSIM, Suricata) Centralized logging (rsyslog+loganalyzer, splunk, zlogfabric, octopussy, Samhain, Graylog2, Kibana,, OpenTSDB, Flume, Scribe CMS (wordpress, joomla, mambo, typo3, etc and other custom developed CMS) and many other applications and services Most of these infrastructure architecture are for high volume traffic web application or for massive computing requirements. I can help you in following way. • python, django, golang web app development, REST back-end • code deployment, automation • Efficient monitoring system and notification configuration • OS updated and performance tuning of kernel to support database & applications. • Backup solution to take backup and transfer to offsite. • A configuration management ( saltstack / puppet/ cfengine) and load balancing solution. • • Source control using git, svn • On call support.

    $33.33 /hr
    21 hours