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

Rolando Jr. P.

Rolando Jr. P.

Freelance IT Support and Help Desk

Philippines - Tests: 1

To obtain a position which will allow me to use my excellent communication skills. I can explain in clear and simple terms, the various details of a product, or troubleshoot at a moment's notice. To utilize my prior experience in working in a call centre. I am aware of the factors that govern the job of a technical customer support and will need less hesitation than most other candidates. I have the patience and the stamina to endure long work hours and thus I can benefit my company as well.

$5.56 /hr
348 hours

Milic Dubak

Milic Dubak

Expert PLSQL developer and Oracle database administrator

Montenegro

I have several years of experience in software development and database administration. Working experience in banking and telecommunication companies. Many projects accomplished like: database migrations and upgrades, Oracle RAC installations, Oracle database replication, Oracle BI and DWH configuration and several application software development projects.

$40.00 /hr
1 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

Mel-Leo Rosal

Mel-Leo Rosal

Software and Web Solutions

Philippines - Tests: 16 - Portfolio: 21

I am good at Software Programming, Web Programming, Data Analysis, Database Design and Systems Administration. tl;dr I'm always available just email me here for requests. Over the last 7 years, I have developed many custom applications for private individuals and small businesses. I also have the passion in web hosting, web programming, network security and optimization of systems. I consider myself as a creative solutions maker and I am here to learn more and to offer quality solutions to your IT related problems. • Main Skills (VB, .NET, C#, SQL, ASP, PHP, JavaScript, CSS, MSAccess, ...) • Other PL/ML/SL (C/C++, Java, Shell Scripting, AutoHotkey, AutoIt, LUA, ATCommands, ... ) • Business Systems (Inventory and Billing System, Stock Management System, Hospital System, Point of Sales System, Restaurant System, Payroll System, ...) • Hardware Integrations (GSM Modems, Barcode Readers, ...) • Software Integrations • Database Systems (MySQL/MariaDB, MSSQL, ...) • APIs (Win32 API, ...) • Others (OpenVPN, WinAutomation, Batch, GIT, SVN, ...) • Tools (Basic4Android(B4A), Visual Studio 6/2008/2010/2012/2013, Crystal Reports, Inno Setup, Bootstrap, jQuery, WordPress, ...)

$22.22 /hr
31 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

Habibur R.

Habibur R.

Malware Removal | Web Security | Hack Recovery

Bangladesh - Tests: 1 - Portfolio: 8

I specialize in malware removal, webapps penetration testing, computer forensics, ethical hacking and linux server security. My Area of Expertise are: 1. Malware removal *- Identify the malicious code in website. and remove it. *- malware, phishing, spam removal and other malicious code removal. *- Antispam protection. *- confirmation with Google webmaster for malware status, request for removals from the blacklist if listed, work it until completed. *- secure website with guarantee!! 2. Ethical Hacking(White Hat Hacker). - hacked account recovery, - password recovery. - security analysis. - decode encrypted files. 3. Web security, penetration testing hack recovery - Spot exploit used by the hackers. - Vulnerability Assessment. - Server security. - Security analysis of database servers. - webapps penetration testing. - Restore hacked website. - WordPress, Joomla, Drupal, Opencart and custom PHP website security and prevent hack. - keep monitoring for future hack attempts for the coming weeks and if possible, patch the vulnerability that allows the hack - Install upgraded security to prevent further hacks - Integration your site with Cloudflare(www.cloudflare.com), free of charge, to make website bulletproof (also increases site loading speed) - ### secure website with guarantee! !### 5. Web Programming *- PHP, HTML, CSS, JavaScript, MySQL 6. DNS *- DNS (Domain Name System) manager, Custom DNS Record, Domain Transfer *- Move websites to new host without any downtime. 7. Analytics *- Google analytics, Piwik and custom analytics. 8. Other

$16.67 /hr
417 hours