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Last updated: October 1, 2015

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Dmitrijj Sergeevich Kashirin

Dmitrijj Sergeevich Kashirin

Java Developer with Linux experience

Russia - Tests: 4

I'm Java Developer with strong Linux experience. My strong skills is Data analysis, Linux, Java, SQL. Also I have skills in Continuous Integration and build and delivery operations. My development experience is 5 years on server-side, client and desktop applications. I believe my strong points are my accuracy and punctuality. My #1 goal will always be to meet your needs and deadline. When working on a new project, I like to speak with the client, so that I can have a clear understanding of his/her needs and vision of the project. I'm honest and fair. Since 2012, I'm Java Developer in T-Systems company and developing client and server-side applications on Ubuntu and RedHat systems. Additionally I'm developing parsers, crawlers and scrappers for data-mining of different web-sites and documents. Thank you in advance for your time and consideration. I look forward to working with you soon. I have a Masters degree in Applied Mathematics and Physics from Saint-Petersburg State University, in the Russia. Listed below are my experience and skills. — Java Core: Java Core, Multithreading, Collections API; — Frameworks: Spring, JUnit, Mockito, Jsoup, Velocity, Play Framework; — Servers: Apache HTTP, Tomcat, JBoss; — Continuous Integration: Jenkins, Maven, Gradle, Ant; — Scala (Play framework) — Core web: XML, JSON, HTML/CSS, JavaScript; — IDE: Intellij Idea, Netbeans; — OS: RedHat Enterprise Linux, Ubuntu Linux, HP-UX, Windows; — VCS: Git, Mercurial, SVN; — Bug/Issue trackers: Jira, Bugzilla; — SQL;

83% Job Success
$20.00 /hr
169 hours

Gabriel P.

Gabriel P.

PHP Developer Joomla Wordpress Drupal Magento Prestashop

Bolivia - Tests: 5 - Portfolio: 1

Developer with high experience working for more than 7 years with PHP and Frameworks based on it, like CakePHP, Yii, Zend, YAF. I worked in several projects using CMS like Magento, Prestashop, Joomla, Wordpress, Drupal, Croogo and much others more. I like to deal with new challenging projects and always I'm improving my knowledge, I have a Master Degree in Telecomunications so I can help with your servers too, Apache, Mysql, GNU/Linux (I love all the OS based on System V), of course you always will have the oppotunity for testing my skills. My work will talk by itself, I'm sure that you won't be dissapointed I look for long term relationship with clients giving always my best effort. In my office I have a team of skilled developers too for helping you in all the tasks you require. Give me the opportunity and you will see my capabilities by yourself.

80% Job Success
$13.00 /hr
571 hours

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

100% Job Success
$16.67 /hr
534 hours

Mohamed Zain

Mohamed Zain

Sr Linux Systems Engineer | Dev/Ops | Open source integration Engineer

Egypt - Tests: 10 - Portfolio: 3

+7 years experience install / manage and operate linux servers on a high scale machines infrastructure , open source solution consultancy using Nginx / PHP-fpm,MySQL,Kannel SMS Gateway,Memcache/Redis, Couchbase ,ElasticSearch / Solr Nagios/lcinga/munin, Puppet, Chef, Bash Scripting, PHP, Ruby, Vagrant, Docker , Git, AWS , VOIP, Asterisk also i have experience in load&stress testing and security vulnerability assessment

$25.00 /hr
72 hours

Michael T.

Michael T.

System Administrator

Russia - Tests: 15

I have 10 years of experience in system administration. I took part in a variety of projects, configuring and supporting servers and services based on Red Hat/RHEL/Centos, Debian, FreeBSD, and Solaris. For the last 3 years and at the present time, I have been occupied with projects based on VmWare ESXi hypervisor and Windows Server 2008 R2, and implementation of information security policies. I also have a brief experience in Oracle and MySQL administration. Currently, I am seeking for Unix and Linux administration tasks.

$30.00 /hr
564 hours

Marcus V.

Marcus V.

Marcus V.

Brazil - Tests: 4

RHCE/RHCI certified professional with more than 15 years of experience working as system administrator, managing IBM AIX, Windows and Linux servers (Slackware, Fedora, RedHat and Ubuntu). Broad experience with AWS (Amazon Web Services) using EC2, ELB, S3, RDS and AWS API Tools. High knowledge about virtualization including Xen hypervisor and VMware. Experience with Iptables, DNS, Squid, Sendmail, Postfix, CACTI, Shell Script etc).

100% Job Success
$44.44 /hr
18 hours

Sergiy R.

Sergiy R.

Linux System Administrator

Ukraine - Tests: 9 - Portfolio: 1

I am an experienced System Administrator with a wide range of skills, including Linux servers administration, LAMP stack setup, OpenVZ and KVM virtualization, configuring services, working with version control systems and writing system maintenance scripts. I have a hands-on experience with Linux, including Ubuntu, CentOS, Red Hat, Gentoo and Debian distributions. I am able to code in OCaml, C, C++, Ruby (including Ruby on Rails), Bash/Zsh and read Java, Python, Haskell, Perl and Common Lisp programs. My most important virtues are: extreme responsibility, easy communication and attention to details.

100% Job Success
$40.00 /hr
476 hours

Andrei Volkov

Andrei Volkov Agency Contractor

Linux specialist (Sec/Opt/Dev, C/Perl/Python/PHP/BASH)

Belarus - Tests: 5 - Portfolio: 13

Important: ------------------- Enhanced shield of your Web application with mod_security! Should be always. It is task #1 after installation ANY web application! ------------------- About Me and more: ------------------- I have over 16 years of work experience with Linux systems. This is the list of software and technologies with which I deal. This list is not full and expands day by day. I always can find right decisions if I found some problems. And I am always interested in looking for mostly economical and productive solutions. Of course, Cpanel, WHM, Webmin, Plesk .... I know how are working these web-wrappers and I support their. I can will tune and to make the checking of these wrappers. But that more important !! I can work without this))) Directly use configuration files of services and etc etc. Usually, it is better way on dedicated servers. ) TCP, IPv4 , IPv6, IPX ... - WiFi, WEP, WPA, WPA2 ... - SElinux, Apparmor, Smack, Tomoyo ... - LAMP ( Apache, Nginx, PHP, Perl, Mysql, Mongo), REDMINE ... - Cpanel, Zpanel, ISP ... - MySQL clustering and replication DNS servers ... - SENDMAIL, EXIM, POSTFIX (POSTFIXADMIN,MYSQL,DOVECOT,POLICYD) ... - HPC system: Torque, Maui, Moab for HPC clusters, Infiniband, FC interconnect, iSCSI, SCST, DRBD, OFED, OPENMPI ... - OpenLDAP ... - VPN with OpenVPN, PPTP, StrongVPN ... - Nagios, Zabbix, Ganglia, OSSEC ... - SVN, CVS, GIT ... - KVM, Xen, OpenStack, Proxmox ... - NBD, RAID, LVM ... etc etc During these years I have been in a large number of tasks related to administration of network devices, as well as with simple and complex server systems. I manage servers for the HPC tasks and for network infrastructure of Internet and Intranet - DNS,DHCP,*FTP,HTTP(S),MAIL etc etc. The main goals - the monitoring of the performance and the security. I also implement tasks of data backup and troubleshooting, support for the users. I have comprehensive work skills with systems based on Debian, Redhat, CentOS, SLES, OpenSuse. I've got more than 8 years of experience in developing the different software with use of C, Perl, Python, Bash, HTML on system and user levels. For example, very important skill in developing and the modification of RPM packages (rpmbuild, rebuild, kernels), custom kernels and etc etc. ------------------- Often: ------------------- How the standart service for VPS's and VDS's projects and dedicated servers: IDS, IPS, the control of contents of log's files, the control of load of the cpu, the memory, the hard disks; the backups of the databases and the files; install or update software, consultations. Emergency call via sms to cell phone. ------------------- STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. VERY OFFTEN: IF YOURS WP WAS HACKED 1. disable plugins 2. execute # diff -r dir1 dir2 3. repeat for plugins if you have last version of WP code: ~ 80% cases - problems: plugin low quality (look on author: from where and who is) ~ 15% cases - problems: theme low quality (look on author: from where and who is) ~ 5% 0day of WP also you need disable all shell function in php and enable suphp/suexec modes. STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. I am getting a lot questions about reliability and quality distributives/clones Ubuntu. Results on practice - Ubuntu clones - worst for server. It is truth. If you $buntu guy, I can't help you right now. I only can recommend Debian way for server. =============== 3. Nginx of course is good program. For small/middle vps. But in serious projects - apache. Nginx will be suitable for frontend. It is only practice. Always for all web application should be mod_security module. Firewall of level of web application on 7 level of OSI. Each web application/site should be under own user in environment of vps or on dedicated servers. =============== 4. By topic Wordpress. For optimisation services of OS , namely system IO(type of disks or partitions) and DB(type of engines of tables), need to use empty installation (default variants). Most problems of work WP contains in itself - customized plugins or themes. For analyze pages need begin with such services as =============== Sunday - day of rest. Or in emergency case - payment with double rate. best regards, Andrei / PS: With love from USSR. ;-)

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100% Job Success
$16.00 /hr
1,023 hours