Top Upwork Freelancers

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  1. Tiago Hillebrandt

    Tiago Hillebrandt

    Linux System Administrator

    Brazil - Tests: 2

    I have been working with Linux and other free software technologies for a long time, developing scripts and tools to automate tasks, and managing servers as well. * Linux Servers Maintenance * Scripting: Bash, Python, Perl, Ruby * Web Servers: NGINX, Apache HTTPD, Apache Tomcat, lighttp * Automation: Puppet * Server Monitoring: Nagios * Database Servers: MySQL, PostgreSQL * Proxy and Caching * Experience with APIs: Linode, Media Temple, Digital Ocean, Amazon Route 53, Zerigo DNS, QuickBase, Sucuri, Loggly, WordPress Plugins API * Mail Server: Postfix, Exim * Samba File Server * Networking: Bind, DHCP, iptables * WordPress: Core, Plugins, WP-CLI * Development: PHP, Python, Java, SQL, XML, JavaScript, HTML5/CSS, Shell

    $33.33 /hr
    0 hours
    0.00
  2. Yavor Yanakiev

    Yavor Yanakiev

    System Network Engineer

    Bulgaria - Tests: 2 - Portfolio: 1

    An IT Professional with CCIE(Lab Attempted),CCNA,CCDA, CCNP,JNCIA, JNCIS-Security and more than 10 years of experience in Network designing, planning, and implementation. Possess extensive experience with hands on products like Routers, Switches, Firewalls(UTM Devices), Servers, Link Balancers, PABXs(Telephony Systems). I was involved in a complete setup of Data Center in my career - design, implementation and support. SYSADMIN: Debian Linux / Ubuntu Linux / Red Hat ES Linux / CentOS Linux / FreeBSD Unix /pfSense Unix / Cisco Routers & Switches FTP SERVICES: proftpd, vsftpd, pure-ftpd, sftpd, tftpd FILE SHARING SERVICES: Samba, NFS PRINTING SERVICES: Cups CACHE SERVICES: Varnish, Memcache, MemcacheDB, eAccelerator WEB SERVICES: Apache v1/2, Nginx, PHP v4/5, Suhosin MAIL SERVICES: Postfix, dovecot, courier, RBL, postgrey, spamassassin, amavis, razor, pyzor, clamav, dcc DB SERVICES: mysql v4/5, phpmyadmin, mysqlcluster, postgresql v7/8, phppgadmin DNS SERVICES: bind9, tinyDNS, powerDNS PROXY SERVICES: Squid, SquidGuard, DansGuardian, URLFilter, haproxy, pond FIREWALL SERVICES: iptables, ipfwadm, netfilter VERSIONING SERVICES: SVN, CVS, GIT IDS SERVICES: Snort, PortSentry, Fail2ban, Bastille, Chkrootkit, Rkhunter, Tiger, Tripwire, Aide MONIT SERVICES: Nagios, Cacti, Zabbix, Mon, Monit, Zenoss, Ntop, Munin KERNEL SERVICES: kernel v2.4/2.6, grsecurity, openwall, other patches STATISTIC SERVICES: Awstats, MRTG, Vnstat, Htop, Bwm-ng NETWORK PROTOCOLS: TCP/IPv4 IPv6, IPX, ROUTING: Static Routing, Rip v1/2, (E)IGRP, OSPF(V3) SWITCHING: VLAN, VTP, STP, Inter VLAN Routing WAN: PPP, FR, Network Security, ACLs, IP Addressing, NAT NETWORK MANAGEMENT -Planning, designing, configuring and managing LAN/WAN ensuring maximum network uptime. - Carrying out installation & configuration of network, troubleshooting network problems. - Monitoring and analysing the network including Netflow products(Manage Engine Netflow), Solar Wind Orion, Wire Shark, Sniffer Pro, MRTG ,Cacti, Ethereal, Deep9s Edge Security Profiler, Nmap, Kiwi Syslog Server Possess sound knowledge of: - Cisco IOS up to and including version 12.4 – Advanced Enterprise Services. - Catalyst Switches IOS up to and including version 12.4 - Advanced IP Services. - Catalyst Switches including 1900, 2950, 2960, 3550, 3560, 3750, 4506 and 6509. - Cisco Routers – ISR800,1700, 3600, ISR 2801,ISR2821, 7609, ASR1002 - Routing protocols RIP, OSPF, IGRP, EIGRP, IS-IS, BGP, static & default routing. - IP Multicast technology – PIM implementation, IGMP -VLSM, PPP, IP Addressing, Redistribution, Network Address Translation, TCP/IP, DNS, DHCP, Network Aggregation - Switching technologies like VLAN, Inter-VLAN Routing, Ether Channel, VTP, MLS, HSRP, VRRP, UDLD, STP 802.1d and 802.1w - Remote Access Solution like ISDN, Frame- Relay, PPP and HDLC. - Network designing and trouble-shooting. Network Cabling and Infrastructure. - Elfiq link balancer basic experience http://www.elfiq.com/ - Basic experience with MPLS VPN configuration and implementation with PE-CE routing protocol configuration Network Security - Implementing & configuring VPN ( Open VPN, Site to Site VPN,PPTP, Mobile IPsec VPN) - Cisco Firewall - PIX 506e, ASA 5505, 5510,5520 – experience in maintenance and configuration - Cisco IPS/IDS Firewall - ASA 5505 with AIP SSC-5 - Linux IPS/IDS Firewall - Deep9s - basic experience in maintenance and configuration - Linux Firewall - Pfsense - FreeBSD based firewall in VMware environment - Handling security of Cisco IOS - Zone-based Firewall - Managing Access Control (ACL), Traffic Filtering - Implementing and monitoring information security policies. - Handling network and information security audits. VOICE SERVICES - Cisco ISR 2821 with CUE – configuration of Auto attendant system, Dialling plans, Voice Mail, Fax services, E1, Pots, configuration of IP telephony, Accounting and Billing, Conference Service; - Cisco Unified Communications 520,540 – Dialling plans, Fax services, E1, Pots, IP telephony, Voice Mail; - Intercom – Helios IP; Operating System Knowledge - System administrator experience with various operating systems - Windows 3.11/95/98/2000/2003/XP,Vista,Win7, DOS, FreeBSD(basic), Debian(basic), Windows server editions(Windows 2003,Windows 2008 R2,Windows SBS2011;) Special Services - SMS gateway Ozeki NG http://www.ozekisms.com/ - Nextiva and Loronix video server and client software; Verint Networking appliances – encoders and decoders http://verint.com/ - Axis video software and encoders http://www.axis.com/ Virtualization - VMware ESXi 4.1, ESXi5 - Microsoft virtualization – Hyper V server - Blade Centre H, HS22

    $15.11 /hr
    0 hours
    0.00
  3. Sandeep Choudhary

    Sandeep Choudhary

    Cisco WLAN Professional

    Germany - Tests: 6

    Working from last 3 years as Cisco Network Engineer. My goal is to be the best at whatever I do. I want to be a successful career person who can act as a source of inspiration to others to do their best. My specialization are: 1. CCNA R&S 2. CCIE Wireless Main Tasks: • Configuration of routing and switching equipment • Implementation of Global WAN/ LAN/ WLAN strategies • Definition of virtual Networks • Global WAN Administration and Monitoring • Optimization and Expansion of group Network • Diagnosis and elimination of network Failure • Implementation of site connections • Manage, Support, Implement Wireless connections worldwide • Reporting network operational status by gathering, prioritizing information and managing projects • Establishing networking environment by designing system configuration, directing system installation, defining, documenting, and enforcing system standard • Maximizing network performance by monitoring performance, troubleshooting network problems and outages and scheduling upgrades • Manage deployment and testing of code updates for wireless systems, such as ISE,ACS, WCS/NCS/PI, and WLC. • Responsible for advanced enterprise wireless LAN administration and design, point-to-point and point-to-multipoint topologies. • Resolve escalated hardware and software issues related to LAN/WAN. *** Here is my personal blog: rscciew.wordpress.com

    $16.00 /hr
    0 hours
    0.00
  4. Yogesh Sharma

    Yogesh Sharma

    Active Directory and Exchange consultant

    India - Tests: 3 - Portfolio: 1

    A Highly motivated and result-oriented individual with over 8 years of experience in a professional environment having a great work culture and meticulous attention to detail with emphasis to customer satisfaction. Ability to achieve set targets and goals in a timely manner. Microsoft Certified System Engineer in Windows Server 2003 with Exchange and Technology Specialist in Windows Server 2008. Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft Exchange Server suite (2003 to 2013). Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft Active Directory Services(2003, 2008). Extensive hands-on experience in configuring, monitoring, and maintaining systems running Microsoft Cluster Services. Extensive hands-on experience in configuring, monitoring, upgrading, migrating and maintaining systems running Microsoft SharePoint Services(MOSS 2007). Troubleshooting Windows Server related issues(AD, DFS, IIS, DHCP, DNS, and WSUS) Projects, Installations, Configurations and Migrations etc. Configuring and troubleshooting on Mailbox, CAS, and Hub and Edge server roles installations. Configuring High availability solutions like Local Continuous Replication/Cluster Continuous Replication/Standby Continuous Replication technologies. Troubleshooting on Mailbox Migration, Public Folder replication, Database Inconsistency, Exchange services, Offline Address Book, Recovery Storage Groups. Implementing Disaster Recovery in exchange servers for recovering exchange information. Configuration and Troubleshooting External Mail flow (Inbound/Outbound), Mail flow between servers, Spam issues, Edge Synchronization. Configuring Anti spam/Transport agents, Application Relay, SMTP/Transport service problems. Analyzing and evaluating issues using various tools and utilities like EXBPA, EXTRA, ExMon, PFDAVAdmin, Exmerge, DCDIAG, NetDiag, NLtest, telnet, Replmon, AD modify, ADMT, MFCMAPI, etc. Installation, Configuration & Monitoring of Trend Micro Internet Messaging Security Suits & Symantec Endpoint Security. Basic Hygiene & Server hardening of all Windows OS, Linux OS & Subsystems likes IIS, ADS, and SQL Server etc. Security Health Check of all Windows & Linux OS. Ensure documentation of all activities & procedures adhering to organization standards

    $12.00 /hr
    2 hours
    0.00
  5. Nickolay S.

    Nickolay S.

    Web developer. Symfony2. Angular.js

    Russia - Tests: 9

    Highly professional php/symfony developer with over 5 years experience in complex projects. I also am master in js, databases, c++ and linux administration. Have experience in mobile, desktop and server software development. Can easily learn new languages, tools and software. Perfect both at working independently and as part of a team. Technical skills: Languages: php, javascript, html5, css3, C++, Qt/QML, .net/C# Web frameworks: symfony,silex,laravel; backbone.js,angular.js; bootstrap,foundation Mobile frameworks: Unity, Marmalade, Cocos 2d Platforms: Windows, Linux Database: SQL Server, MySQL, Postgesql, Mongo, Redis

    $11.11 /hr
    0 hours
    0.00
  6. Kirill Konshin

    Kirill Konshin

    Web-developer, front-end developer

    Russia - Tests: 6

    Hi! My name is Kirill. I'm looking for some front-end developing job here like converting your PSD to HTML to pixel, cross-browser coding or interface animations programming (for example http://web-hunt.ru/ ). Before the new projects starts i prefer thoroughly to find out what exactly do you want to get in final, to get your vision of a project. I am fair, and i am always try to keep up your deadlines. I've been working in interactive agency for a 7 years and it helps me improve my professional skills and always be in trend. Listed below are my experience and skills: — Core web: XML, JSON, HTML/CSS, JavaScript, PHP, Node.js, coffeescript, jquery, lodash, angularjs, backbonejs, canjs; — Coding for the mobile web, Adaptive coding; — OS: Linux, Windows, Mac OS X; — VCS: Git; — MySQL, PostgreSql; ...and many more!

    $12.99 /hr
    0 hours
    0.00
  7. Anton Kalugin

    Anton Kalugin

    Desktop developer

    Russia - Tests: 2 - Portfolio: 1

    I'm a c++ programmer, I write in this language for more than 6 years. Before that i had write on php for design and developing small sites. Not so long i was developing plugins for 3d max and Mapinfo, some converters for graphic files, and so on. Now i'm using QT to create user interfaces. I have small experience with creating 3d objects in 3d max and Google sketchup. For some projects i was used LINQ and WPF.

    $10.00 /hr
    0 hours
    0.00
  8. Adnan Ramzan

    Adnan Ramzan

    BI Developer

    United Kingdom - Tests: 1 - Portfolio: 2

    I did my Bachelors in Computer Science from Punjab University Pakistan. After successfully graduating i started working in Pakistan with the first house of Pakistan and that is Systems Limited. Over the last 2 years, I have developed a wide range of Dashboards and Reports using Microstrategy, SSRS, PowerPivot, PowerView, Performance point Dashboard and Tableau. I worked on SSAS and successfully deployed cubes on client side. I implemented Time Intelligence in SSAS using MDX. I created reports both on OLAP and OLTP systems and worked on ETLs using PL/SQL and SSIS. We have number of systems from which we have to extract data and transform it according to client requirement and then load it in out database. I carry out all these tasks and developed number of packages to load data from different systems. I am seeking opportunities to build BI solution from the ground up for you or your business. I also have some experience in the following areas: T-SQL, .Net, OOP, SharePoint and HTML.

    $20.00 /hr
    0 hours
    0.00
  9. Mohit M.

    Mohit M. Agency Contractor

    RoR + PHP Expert

    India - Tests: 2 - Portfolio: 7

    I have more than 2+ years of experience in PHP and ROR. My strengths are my commitments and I work for the client satisfaction. I am experienced in developing large scale rails projects with different versions and REST full style coding. Rails Rails 2.3.x, Rails 3.x, Rails 4.x, Worked intensively on Spree Commerce Rspec, Selenium ,Cucumber Haml, Coffeescript, Sass, Compass, Less, Devise, Resque, Paperclip, CarrierWave,... Heroku, Amazon S3, Amazon EC2, cloud files ... Mysql, Postgres, MongoDB Excellent expertise in Magento, WordPress, Joomla CMS, Squarespace, CakePHP

    Associated with: Samosys

    $18.00 /hr
    148 hours
    2.85
  10. Diego Yungh

    Diego Yungh Agency Contractor

    Frontend Developer

    Brazil - Tests: 2

    I am a very friendly developer with more than 5 years in professional web developing. My strong points are Restful applications, Sockets and Dashboards. From raw JS to full-stack frameworks I can work in any environment, I will learn and adapt my knowledge and tools to your needs or provide you with insight and ideas if you give me the opening to. I am always testing bleeding edge technologies and learning the new resources for the web. It is also my job to be in tune the newest resources.

    Associated with: Yungh's

    $25.00 /hr
    1,975 hours
    0.00