Top Upwork Freelancers

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  1. Muhammad Emam

    Muhammad Emam

    Software Engineer

    Netherlands - Last active: 3 months ago - Tests: 6 - Portfolio: 3

    Who I am: Software Engineer with extensive experience in Python programming, Cloud Computing, NoSQL datastores and large-volume data analytics. What I do: - Designing and implementing highly scalable, highly available software. - Analyzing business data-models and building appropriate analytics platforms. - Maintaining and developing existing systems to help businesses achieve lower Time To Market.

    $44.44 /hr
    268 hours
    5.00
  2. Serhiy T.

    Serhiy T.

    Linux, FreeBSD, Windows, Network, Apache, MySQL System Administrator

    Ukraine - Last active: 03/05/2012 - Tests: 12 - Portfolio: 1

    - Operating systems: FreeBSD, openSUSE, Red Hat, CentOS, Debian, Ubuntu, Gentoo, Windows: 2000/2003/XP/Vista/7, Mac OS X: 10.4-10.6 - Programming languages (basic level): Bash, PHP, Perl, SQL, C, Objective C, html - Network protocols: TCP, UDP - Network services: DNS, FTP, HTTP, HTTPS - Web Servers: Apache, Nginx, Tomcat - MTA: Postfix, Qmail, Exim - FTP Servers: Pure-ftpd, Proftpd, vsftp - Firewalls: ipfw, ipchains, iptables - Network tools: route, iproute2, natd, tcpdump, netcat, trafshow - Databases: MySQL, MSSQL, Redis - Network file systems: GlusterFS - Virtualization: OpenVZ, Xen, VMware, Virtual PC - Version Control Systems: Subversion - Control panels: cPanel, WHM, Plesk - Monitoring systems: Nagios, Zabbix, Monit, Munin, Cacti - Cloud services: Amazon EC2 - Bug tracking systems: Mantis, Redmine, Trac, Jira - VPN: Mpd, OpenVPN, PPTP - Other software: Squid, Samba, Bind, Radius, Varnish, HAproxy, Wowza Media Server

    $33.33 /hr
    44 hours
    5.00
  3. Roberto R.

    Roberto R.

    Team Leader (& Developer)

    Mexico - Last active: 3 months ago - Tests: 2

    Leader of a small team of smart developers. Well experimented in: - BCP - Business Continuity Planning - Mission Critical - Business Application Integration (Legacy/Mobiles/Web) - SQL & Op.System standard of many vendors or providers - Magic Development Platform / uniPaaS / Xpa from +20 years - Magic Integration Platform / iBolt / Xpi from +5 years +25 years working in IT as Specialist Software Support InterNetworking Consultant

    $80.00 /hr
    20 hours
    5.00
  4. Pete Littlewood

    Pete Littlewood

    Web Applications Developer

    United Kingdom - Last active: 6 months ago - Tests: 7 - Portfolio: 3

    I primarily develop bespoke web applications and systems that integrate with desktop applications, however have used my web programming skills to create custom web scraping/data mining utilities for a variety of clients, both on oDesk and offline with other clients. I am strongest coding with web technologies such as PHP, Ajax, jQuery etc however have also completed tasks in lesser known languages such as Coldfusion. Away from web development I am also a proficient Visual Foxpro developer and currently in the process of progressing in C# which is one of the most popular desktop programming languages currently.

    $17.78 /hr
    86 hours
    5.00
  5. Mihail K.

    Mihail K.

    UNIX/Linux administrator

    Belarus - Last active: 3 months ago - Tests: 5

    I love UNIX! I love one-line shell scripts! I work with Debian, RedHat, HP-UX. Little with OpenSolaris and FreeBSD. I have experience in creating and supporting monitoring systems based on Zabbix and Nagios (several tens of servers with different OS). I am well familiar with network protocols and tools for testing and troubleshooting (wireshark, tcpdump, nmap, traceroute, etc.). I have experience in creating secure VPN tunnels based on OpenVPN, IPSec, L2TP/IPSec, GRE and PPTP. I was installing and configuring lighttpd, apache httpd, nginx, exim4, dovecot, samba, OpenLDAP, etc. I have experience with creating mail servers used in hosting company for many customers. I was working with virtualization Xen, KVM, VMware. Have experience with cloud services like Amazon EC2. I have experience in installing and configuring Oracle 10g, 11g, PostgreSQL, MySQL.

    $16.67 /hr
    88 hours
    4.97
  6. Jose Arteaga

    Jose Arteaga

    Cisco Telecommunications Engineer - Powering productivity through Comm

    Venezuela - Last active: 5 months ago - Tests: 6

    Who I am... Network Engineer with 5+ years of experience working with a variety of technologies from different vendor like Cisco, VMware, Microsoft, Watchguard, Barracuda, etc. I had designed and implemented networks from scratch starting on the infrastructure (Routing and Switching), Security and finally the Applications (Unified Communications and Collaboration). My Mission... I specialized on designing and implementing network solutions for small, medium and large businesses in many different vertical markets like the oil and gas industry, banking, food and beverages industry and others. I had achieved customer satisfaction 100% of the time and exceeded their expectations while staying on-budget, meeting deadlines and finding new business opportunities inside the company and the customers. Always looking for the biggest challenges that help me excel myself not only in the networking field, but also in the business management side of the company making myself an integral and interdisciplinary engineer capable of achieving the impossible.

    $50.00 /hr
    257 hours
    4.99
  7. Sergey Mikayelyan

    Sergey Mikayelyan

    Flash/Flex/AS3, Starling, Feathers Developer

    Armenia - Last active: 18 hours ago - Portfolio: 4

    Worked on complex Desktop implemented based on Flash/Flex/AIR/AS3 . Working on mobile (web) game using Flash/AS3 starling feathers frameworks.

    $13.33 /hr
    5,461 hours
    4.50
  8. Dmitry Gorlov

    Dmitry Gorlov

    Linux Admin / Oracle certified professional

    Russia - Last active: 18 hours ago - Tests: 11 - Portfolio: 1

    Under construction... I start my IT career since 1992 using FoxBase by IBM-compatible 286AT computer. Today my phone have more powerfull CPU :-) In Linux from 1997, begun from Redhat 6.0 In Oracle from 2003, begun from 8.1.7 10g OCP Certified in 2007. Microsoft MCP in 2007. http://krasitel.blogspot.com

    $20.00 /hr
    388 hours
    5.00
  9. Guillermo J.

    Guillermo J.

    Windows Phone & C/C++/C# freelance developer

    Spain - Last active: 18 hours ago - Tests: 2 - Portfolio: 1

    Studies: Mathematics and Computer Sciences. Very proficient in C, C++, C#, Python and LaTeX; reasonable proficiency at other languages (Java, Ruby, Sage, Javascript, SQL). Interested in stimulating projects and solving hard and complex problems.

    $25.00 /hr
    125 hours
    4.89