Network & System Administrators

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Aleksandr Z.

Aleksandr Z.

Expert UNIX and network administrator

Russia - Tests: 10

My goal is customer satisfaction. If you need to get something done - leave it to me. OS: Linux - expert, FreeBSD, solaris and Windows Server - proficient Cloud services: AWS, Rackspace Web servers: Apache, Nginx, Tomcat Database servers: Mysql, Postgresql Monitoring: Nagios, Zabbix, Monit, Munin, Cacti Virtualization: Citrix, OpenVZ Mail servers: Dovecot, postfix, Exim Backups: Bacula, duplicity Other: standard network services (DNS, DHCP, LDAP, Samba, http proxy, VPN, backups, monitoring etc), firewalls and routers (iptables, iproute, VLAN, bridging, bonding, bgp, ospf, infiniband).

$20.00 /hr
202 hours

Maksim Kharin

Maksim Kharin

System and Network Administrator

Russia - Tests: 1

Setting up and maintenance network devices: Cisco, Juniper, Mikrotik. (Vlan, Trunk, Port-Channel, EIGRP, IPSEC, Port-Security, STP, VTP). Setting up and maintenance of servers with OS Windows 2003R2/2008R2/2012R2 (AD, TMG, DHCP, FileServer, DFS, DNS, PrintServer, Hyper-V); Linux and FreeBSD (Apache, MySQL, Zabbix, MRTG etc). Writing scripts and programs on PoweShell, Perl, PHP, C # to automate actions;

$5.50 /hr
5 hours

Alfonso Valdes

Alfonso Valdes

Linux / Amazon AWS / WHM WordPress / Nginx / Security / Docker DevOps

Mexico - Tests: 4 - Portfolio: 6

A self-motivated System and Network security administrator with more than 10 years in the management and analysis of Linux/Unix enterprise Servers (60- 70 servers). With deep and advance knowledge of highly scalable servers, Cloud Computing, High Performance, Hardening Servers, Migrations, Ethical hacking, Development Operations - DevOps, Open Source services and Server optimization. Lately Building WordPress hosting environments highly available and scalable in AWS/DigitalOcean/Google Compute/Azure. Certifications such as: Certified Ethical Hacker - Red Hat Certified Engineer - Cisco CCNA. Expertise in: MIGRATIONS: Wordpress/Magento/LAMP/Cpanel migrations. Helped dozens of clients migrate their web sites and applications into the AWS, Digital Ocean, Google Cloud Compute. Design and build Web Servers with HIGH PERFORMANCE (LAMP, NGINX/python, Nginx/Varnish, Nginx/php-fpm, Jboss, Apache Tomcat and Varnish) - Improve and Fix performance issues, service optimization, security issues and deployments. WORDPRESS HIGH PERFORMANCE AND TRAFFIC SITES IMPLEMENTATIONS: Improve Wordpress performance, design a cloud hosting with complex services using Wordpress, Wordpress multisite, wordpress + woocommerce, wordpress with NGINX/varnish , integration with CDN, Memcached/Redis, Amazon S3, etc etc. Build an entire HOSTING environment from design, implementation and maintenance. MALWARE removal and analysis: WordPress / Magento / Joomla Malware removal and remediation, Incident handling and Forensics analysis. BOOST and optimize websites with: NGINX, Varnish, REDIS, Amazon S3, Memcached, APC, apache tunning and mysql tunning, Amazon CloudFront and more. Amazon Cloud Computing ( AWS ) - AMAZON EC2, Amazon CDN S3, Amazon RDS, Amazon ELB, Amazon AutoScaling, Amazon VPC, CloudFront, Route53, etc. Also Management of multiple Control panels like Rackspace Cloud Computing, SoftLayer, GoDaddy, HostGator, dreamhost and MediaTemple. DevOps and Continuous integration: Docker + vagrant, Vagrant + Puppet, Puppet + Git, Docker + Ansible. Continuous integration with Jenkins, travisCI, distelli and more... Designing and deploying scalable & Highly available systems such as: Amazon Load Balancing (ELB), Hearbeat, HAProxy, Mysql cluster, Nginx Load Balancer, Apache cluster... Network and web security such as: Vulnerability Assessments, Hardening servers, security audits, Penetration testing, Virus/Malware/Threats/Vulnerabilities countermeasures, web security, fail2ban, Tripwire-AIDE-OSSEC, mod_security, mod_evasive, Denial of Services (DDOS) countermeasures, Firewalls (iptables, CSF and apf), etc. VPS: Cpanel / WHM / Plesk / DirectAdmin / Webadmin - Migrations, management, hardening, configuration, maintenance and high level of Administration. Databases Administration such as: Mysql tweaking and tunning, MongoDB, load balancing and Mysql replication (Master & Slave) for High traffic. Database: Mysql tweaking and tunning, MongoDB, ElasticSearch, Apache Solr, Sphinx, lucene, MariaDB, Postgresql replication & Pgpool, Mysql load balancing and Mysql replication (Master & Slave) for High traffic. Networking: TCP/IP high expertise, NAT, FIREWALLS, CISCO routing and switching and Packet analysis with tcpdump and wireshark. Storage solutions and Directory management: SAMBA, NFS, FTP and sftp. LVM and RAID*. SCRIPTING: Bash and python. Proficient with MAIL Servers: postfix, sendmail and Zimbra. Source control versioning: GIT and SVN. Deploying and maintaining Monitoring systems such as: nagios, ZAbbix, cacti and Jboss Operation Network (JON). Research & development (R & D) for any open source service and technology.

$24.80 /hr
11,605 hours

Yevhen L.

Yevhen L.

Web Expert: Magento, SEO, Scraping, Laravel [10+ years experience]

Germany - Tests: 2 - Portfolio: 4

A expert with 10+ years of experience in web. ✓ Available on Skype and German Mobile ✓ Available to permanent position ✓ Free SEO & IT Consultation Skills: ◉ PHP (Magento, Wordpress, Laravel, Symfony, Custom Code) ◉ FRONT END (HTML5, CSS3/LESS/Boostrap, JavaScript/jQuery) ◉ Server Side (FreeBSD, Linux, Ubuntu, Nginx, Varnish) ◉ SEO (research keywords, SEO analyse, founder https://iocheck.com) ◉ MySQL, database design ◉ NoSQL (Redis, Memcache, etc) ◉ Search Systems (ElasticSearch, SphinxSearch) ◉ Photoshop, Illustrator Latest projects: ◉ http://alamio.de ◉ https://iocheck.com ◉ https://www.sugartrends.com/ ◉ http://www.pharmamarket.be/ ◉ https://firebearstudio.com/ Linkedin Profile: https://de.linkedin.com/in/yevhenlisovenko

$55.00 /hr
28 hours

Md.Ainul Moin Noor

Md.Ainul Moin Noor

Full Stack Web Developer

Bangladesh - Tests: 8 - Portfolio: 10

During the last 6 years, I have been able to develop my strength and skills to enable me to develop many innovative websites and solve difficult problems to a high standard. During my career as a web developer, I learned to design the code to modularize and make it scalable, make the code cohesive, yet loosely coupled to attain maximum flexibility and performance. I prefer working with technical clients, who know exactly what they want - I am essentially a developer, I design and deploy the software to exactly the spec provided. My web experience includes Server side: PHP5 MVC Frameworks and CMS: Laravel 5, Magento, Wordpress, Client side: Javascript, jQuery, AngularJS, AJAX Databases: MySQL, Oracle, MongoDB, MSSQL, SQLite Software Content Management: Git, Github, Bitbucket Miscellaneous APIs: PayPal, Dudamobile, Facebook, Twitter, Instagram, Google Map, Google Custom Search, Youtube, Linkedin, Yelp, Fedex, UPS, USPS, DHL, oAuth. Others: HTML5, CSS3, JSON, XML, cURL, Javascript, jQuery

$11.00 /hr
260 hours

Haider Ali

Haider Ali

Virtual Assistant | .net Developer | Real Estate Process Optimizer

Pakistan - Tests: 3

Filled with lots of positive energy and always excited towards completing my Goals which drives my passion trying to achieve the maximum. I'm creative yet have critical thinking, managing each task I have in an organized way so that it will produce more work in less repetitive actions. My best thing is to observe and learn each logical aspect of facts to get the problem SOLVED. I love to program & find answers to problems using Divide & Conquer strategy. More than 5 years of experience working with off/on shore projects including following tools/skills: 1. Excellent Customer Support 2. US Real Estate Virtual Assistance (REO / FSBO / Cold Calling / Appraisals / MLS Listings) 3. Zoho / GAD (Vtiger) CRMs 4. VB Net / imacros 5. VOIP using Asterisk 6. Google voice 7. Bootstrap Landing Pages / Squeezed Pages / HTML 5 / Java Script 8. C# desktop Apps with Microsoft Sql Server / Sql Compact 9. Lead Generation 10. Email Campaigns 11. Google Analytics 12. Admin Support 13. Logo / Broucher Design (Adobe Indesign / Photoshop)

$4.00 /hr
21 hours

Andreiko V.

Andreiko V.

Senior Web Expert with Best Idea.

Ukraine - Tests: 2 - Portfolio: 7

Thank you for viewing my overview. I am web and desktop developer. I specialize in computer engineering and have 20 years of experience in this branch. After self-studying math and MATLAB, determined to continue reading computer books based on them. Languages such as BASIC, C/C++, HTML/CSS, W3.CSS, Bootstrap and Foundation had me encouraged toward coding. So , JavaScript such as DOM, jQuery AngularJS,AJAX; Server Side page such as PHP SQL ASP Razor ASP.NET; JSON/XML/XSLT/DTD/XML Schema/SVG data structure design and parsing; VB/VC++/ObjectiveC and Java applet/Android. I widely experienced that what is important in programing is not coding, but just design with optimization & higher QoS. This is why I master OOP.MVC . So, I can let you use apache,wordpress,mysql, guarantee you against any risks by consistently adhering QoS of info security (according to just RFCs drafts in IETF) . Android & Iphone app development is not an exclusive property necessary for only top freelancers. Sure I am in a position to develop front & back end APIs either. Especially the former rather than the latter. I have years of experience in media communication, GPS ,ordering anything etc. I carry strong confidence at both of quality and speed of my project. Thank you very much for reading my overview.

$30.00 /hr
22 hours

Richard S.

Richard S.

I'm an Information Technology Specialist

Dominican Republic - Tests: 1 - Portfolio: 15

I am an IT Specialist with more than 10 years of experience working with the following: Windows Server 2003, 2008 and 2012 SQL Server 2005, 2008 and 2012 Microsoft Exchange Server 2007, 2010 and 2013 Windows XP, Windows Vista, Windows 7 and Windows 8 Microsoft Office 2003, 2007, 2010 and 2013 Microsoft Office 365 - Microsoft Exchange Online, Office Professional Plus, Lync Online and Microsoft Share Point Online. Lync Server 2010 and Lync Server 2013

$15.00 /hr
165 hours

Lokesh Jangir

Lokesh Jangir

Expert Windows & Linux server Admin

India

Expert in windows and linux environment, skilled,self-motivated Engineer having experience in the linux & windows System Administration field for the past 6+ years. Have sound and hands-on experience in cloud environment especially in AWS,Solutionpro,Rackspace,Vcloud platforms, handling cpanel WHM,plsek and direct admin platforms. Area of specialization includes Server configuration hardening,Cloud migration,Configuration and installation of various services provided by AWS,Rackspace,vcloud .Monitoring tools configuration,VPS,web servers,vulnerability scanning,auditing,log management,web server(apache,iis,tomcat,nginx),backup,databases(mysql,rds,postgres),WHM Cpanel,Plesk ,Network monitoring, backup and recovery. VMware,Xen virtualization, Version Control system- SVN Subversion, GIT, Visual Source Safe etc..

$19.00 /hr
64 hours

Joseph Devietti

Joseph Devietti

Expert iOS & Android Developer

Finland - Tests: 4 - Portfolio: 7

Welcome review my profile. I am professional Android&IOS application developer. I have experience in mobile development more than 7 years, let me contact if you want to create mobile apps for Android and iOS. I have the following skills: Native Platform : iOS, Android, Objective-C, Swift, Java, C#, C/C++ Web service : JSON, RESTful, Parse, Amazon Chat & Messaging : XMPP, Jabber, Quickblox, OpenTok WebRTC Media processing : OpenCV, GPU Image, CoreAudio, AVFoundation Database : MySQL, SQLite, Oracle, SQL Server, ODBC Social Site : Facebook, Twitter, Linkedin, Instagram, Youtube, Pinterest, Vimeo, Map : Google Map, Geolocation, GPS, Open Street Maps Advertisement : iAd, Revmob, Admob, Chartboost, Tapjoy, Flurry, AppLovin Cloud services : iCloud, AWS EC2, Dropbox Mobile Game : SpriteKit, Cocos2D, OpenGL, Corona, Unity3D, Box2D, Casino Slot machine, Poker, Puzzle Thank you.

$33.33 /hr
502 hours