Perl Developers & Programmers

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Edward C.

Edward C.

Linux sysadmin, programmer (C, Perl, PHP, Javascript), AWS certified

Russia - Tests: 7 - Portfolio: 4

Here is what I do: 1) I configure Linux servers (Varnish, Nginx, MySQL, Apache) 2) I write scripts in Perl, bash, JavaScript, PHP, 3) I troubleshoot existing code, 4) I select the proper use of Amazon Web Services for your needs, 5) I write system software in C, 6) I provide technical support (tier 3) on above-mentioned topics. My background: 2010-2015 Linux system administration of a hosting 2013-2015 Maintenance of UNIX-like RTOS 2006-2015 MediaWiki scripting / technical support

75% Job Success
$25.00 /hr
420 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. ;-)

Associated with: UPWORK.LINK

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

Alexander Sichikov

Alexander Sichikov

IT professional (Apache/Nginx, Mysql, PHP, Perl, etc..)

Ukraine - Tests: 8

Unix Server administration (Linux,FreeBSD): apache,nginx,lighthttpd sendmail,qmail,postfix php,perl, bash scripts firewalls spam defence mysql,postgress EMC: EMC Documentum (Documentum Administrator, Webtop) DQL DFC Windows: Windows Servers Sharepoint installation, administration, customization. Software optimization (wordpress,magento, joomla, and etc) Programming Security audit Project management I have more than 11 years of experience in IT industry Self-motivated

$33.33 /hr
193 hours

Kirill Reva

Kirill Reva

Web Developer

Russia - Tests: 8 - Portfolio: 2

I have been building web applications for over 7 years now. I have a deep background in fundamental PHP5 (with MVC architecture), MySQL, HTML5, CSS3 and jQuery. I am currently focused on Laravel and Wordpress web application work, including building plugins and creating responsive design sites. My previous expertise includes Codeigniter, Yii framework, AJAX, PL/SQL, Oracle DB and Java. Even though I have no proven track record in developing Zend 2 - and Kohana-based sites, I am ready to deal with such projects as well. Regardless of the programming, I am passionate about providing first class results and excellent service. I love presenting the solution I feel is best for my clients and work with them to get them what they need. I am looking for interesting full-time, and ideally long-term projects to keep busy.

Groups: Application Developers Alliance

89% Job Success
$33.33 /hr
7,077 hours

Oleksandr N.

Oleksandr N.

Senior System Administrator, Migration and Security L3 engineer, SSD

Ukraine - Tests: 20 - Portfolio: 16

YOUR POSITIVE FEEDBACK IS THE HIGHEST AWARD FOR ME ;) Will do my best to assist you in any questions and tasks you may have =) Here is some info about my experience. SUMMARY Specialties: Information Technology / Internet / IT Division / Computer security/ Internet Services / System Administration/ Webmaster Support / Web Analysis/ SEO / SEM / Internet Marketing Web hosting services (SSD hosting solutions) EXPERIENCE: d(-_-)b Linux/Windows system administrator, Operations team EuroVPS/WebDomSolutions January 2012 - May 2013 Greece, Athens Responsibilities: - Tickets; - System administration and monitoring. Theoretical and practical skills: - Operating Systems: RedHat/CentOS/Fedora, Debian/Ubuntu, FreeBSD, Windows Server 2003/2008; - Virtualization: Virtuozzo, OpenVZ, VMware, Onapp Xen, Apache CloudStack; - Setup/configuration: nagios, kayako, racktables, confluence, observium, nginx, php-fpm, liteSpeed, Apache CloudStack, Hostbill, WHMCS, redmine; - Control panels: Plesk, WHM Cpanel. - Database Administration: SQL Server, MySQL, MariaDB ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <( -'.'- )> freelancer SEO freelance October 2010 - March 2012 (1 years 6 months) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ o(^_^)o System Administrator / Techsupport Webintellects/Webhostgian/Jumpline/Webdomsolutions November 2010 - March 2012 (1 year 5 months) US, Ohio Responsibilities: - Live Chat support, Tickets; - System/Server/Control Panel administration; - Nagios monitoring; - Internet research and work with technical documentation. Operating Systems: * RedHat/CentOS,Fedora * Windows server 2003/2008 * VPS setup and configuration (Parallels Virtuozzo Containers); Advanced theoretical and practical skills in such areas: - Operating Systems: RedHat/CentOS/Fedora, Windows server 2003/2008; - Virtualization: VPS setup and configuration (Parallels Virtuozzo); - Security: Advanced knowledge of Linux security, Firewalls ( IPtables, CSF, APF, BFD, Fail2Ban), Encryption ( SSL), SSH, Host Security Auditing; - Software: Apache servers (versions 1.3.x/2.2), DNS (BIND 9), QMail, Sendmail, exim, LAMP, Plesk/Exim/Cpanel (installing/upgrading/maintaining), Drupal, Wordpress, Joomla, OsCommerce applications, Yum/RPM usage; - Database Administration: SQL Server 2003/2008, MySQL, MS access. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ b(^_^)d Internet Marketing Specialist || Web Analyst DCoM Soft, Inc. December 2009 – August 2010 (9 months) Responsibilities: - Internet Marketing strategy and tactics - Information architecture and Web site content planning - Research of partners - Internet Market Research - Research Usability Design - Online promotion of company's web-based products Skills: - Search Engine Optimisation (SEO) - Paid online Marketing / Pay per Click Management (PPC) - SEO Copywriting/Editing - Social Media Optimization and Marketing (SMO/SMM) - Experience running USA-targeted social Marketing - Writing press releases - Social networking (Twitter, Facebook, Google follow etc) - Google Products, AdWords/AdSense, Google Analytics, Webmaster tools, Google Merchant, etc. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \(^_^)/ Customer Relations Representative || Advanced Technical Agent Ecommerce, Inc. May 2007 – October 2009 (2 years 6 months) Responsibilities: - Sales, billing and technical support in solving problems reported by clients; - Chat, helpdesk system, correspondence; - View, Adaptation, "repair" clients' sites; - Basic server/service diagnostic and reports to sysadmin department; - Internet research and work with technical documentation; - Work in team. Basic theoretical and practical skills in such areas: - Linux / Unix OS, Windows server 2000/2003, Windows XP/98; - Servers: Apache, bind, sendmail, ProFTP, MySQL, SQUID / SOCKS, MSSQL, Samba; - Easy coding: PHP, PERL / CGI, HTML, JavaScript, CF, ASP,. NET, C + +; - Widely used protocols (HTTP, HTTPS, SMTP, POP, IMAP, FTP (s), TCP / UDP, etc); - HSPHERE control panel (versions 2.3 and 3).

100% Job Success
$32.88 /hr
1,526 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

Alexander F.

Alexander F.

Software developer

Russia - Tests: 6

I like writing programs which make life easier. Given a lot of similar files or a few gigabytes of data, to write a little Perl script to parse them all in seconds is a kind of task I really enjoy doing. While being my favorite programming language, Perl is, of course, not the only one I know. Just like any person pretending to be a good software engineer I can (and like to) write in C, and I used to write some code in C++ (need to say here that I don't like the style of coding when the whole program consists of definitions of various small classes and overloading various methods). I understand and like functional programming (e.g. Lisp and Haskell), and I like using map, reduce and filter concepts in other languages. I'm not a web programmer, that means that I won't apply for any PHP job or, in general, for a job requiring to create web sites. But I used to develop simple web services (Perl CGI scripts, small sites in PHP) and I understand how HTTP works. That means that I can act both as a web browser using telnet and as a web server using netcat and I don't panic when I see Internal Server Error. The last web-related thing I looked at was Node.js; I liked the idea and wrote a few hundred lines of code to see how it works. Just to list some more technologies: I used to create TCP/IP client and server programs in C and Perl both in Linux and Windows; I spent a few evenings developing a compiler and virtual machine for myself just to understand how all this stuff works; I know how to work with databases (just to list some: MySQL, MSSQL, PostgreSQL, SQLite), SQL queries, and stored procedures. I was a member of the ACM team of Novosibirsk university (our best result was to reach world semi-finals) and I spent nine years teaching students how to write programs so I understand most of the 'standard' algorithms: searching and sorting, graphs problems, etc., and can explain them if needed.

100% Job Success
$33.33 /hr
6 hours

alexander Merkulov

alexander Merkulov Agency Contractor

Asterisk/voip/a2billing/freepbx/kamailio expert

Ukraine - Tests: 6 - Portfolio: 5

My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I not like to do something that not need be done, i prefer use developed components and solutions. That not mean i can't do development. I working with different programing tasks for last 26 years. yes, from 6 y.o. I live in it. So i prefer do something new&interesting; I can handle all tasks from linux administration/virtualization upto end-user web for voip. Only task i never do - graphical design part. That is not my field, better hire someone else for design. I have university degree, working with asterisk from start of this project. Have developing experience with freepbx/trixbox&a2billing. I am one of contributor of trunk. Also i can work as mysql/postgres DBA, database architect, has experience with following languages: Perl Python PHP C/C++ Javascript SQL Prolog/Lisp,Forth. In voip i can work with callweaver, asterisk, opensips, kamailio. Developed modules for freepbx, elastix, trixbox, a2billing.

Associated with: UA Prime Agency

92% Job Success
$67.77 /hr
546 hours

Vasiliy Kaygorodov

Vasiliy Kaygorodov Agency Contractor

System/Network administrator

Czech Republic - Tests: 6 - Portfolio: 2

Experienced System Administrator, RHCE, with more than 9 years of experience in the industry. I work mainly in the web development and web-hosting/servers support area. My areas of expertise cover all aspects of Linux server support and maintenance, from the OS/kernel level up to application level. This means that, based on the project needs, I can recommend and develop efficient backend solutions, using modern tools and best practices. For an existing project I can quickly identify bottlenecks and resolve them, without changing the workflow of other stakeholders, or affecting service uptime. My main skills are listed below: - Security tuning, malware and virus removal (Wordpress, Magento, OSCommerce, etc) - Amazon EC2 / Rackspace Cloud / Google Cloud computing setup (incl. GCE/EC2/Rackspace API scripting), experience with CloudFlare, OVH, Hetzner - CPanel, Plesk, ISPConfig and other hosting panels (and their APIs) - Servers configuration management (Ansible, SaltStack, Puppet) - Virtualization (KVM, Xen, OpenVZ/Virtuozzo) - PCI compliance. - Sites/servers/domains migration (Wordpress, CPanel, Plesk) - Shared file systems (nfs, drbd, ocfs2, gfs) - Server security - VPNs, firewalls (iptables/firewalld/ufw), IDS (mod_security) - Server performance optimization (Apache, Nginx, MySQL) - Email white-listing, SPF, high load delivery, performance tuning - Backups, shell scripts, IPv6 etc. I have strong skills in Linux (major distributions), Apache, Nginx, MySQL, monitoring, security, performance, email services, firewalls, web-hosting panels (CPanel, Plesk, DirectAdmin). I can also be a good system administrators team leader, have some experience with Agile/SCRUM dev process

Associated with:

100% Job Success
$55.56 /hr
750 hours