Top Upwork Freelancers

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  1. Jordi S.

    Jordi S.

    Freelance System Administrator

    Spain - Last active: 02/02/2014 - Tests: 7

    System administrator of more than 30 Linux machines - specialized in daily systems maintenance of RedHat Enterprise Linux, CentOS and derivatives. Including tasks are patching and updating, developing, installing and maintaining utility programs/shell scripts to manage application start, stop, end-of-day, monitoring and failure/recovery. Pretty much aware of all typical UNIX/Linux services, especially specialized in Samba, Sendmail, Dovecot, Apache, Perl, ProFTPD, NTP, OpenSSH, MailScanner, Squid, SquirrelMail, SPF, Roundcubemail, Milter-Greylist, Bind, Fail2ban, NFS, NetAtalk, etc. Very familiarized with HP ProLiant series and HP system management software. Perl and C system programmer - please, see 'Monitorix' at http://www.monitorix.org a pure Perl monitoring solution, see also 'Fiwix' at http://www.fiwix.org a UNIX/Linux-like hobby operating system kernel as a reference. I also work with PHP (Ncurses), Perl and Shell scripting for daily system administration. I'm driving my own GNU/Linux service company at http://www.fibranet.cat and I'm happy to provide a wide range of professional services. I also have experience embedding GNU/Linux systems on a different x86 and ARM devices for vertical rock-solid tasks.

    $23.33 /hr
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  2. Harvey Ruback

    Harvey Ruback

    Senior Software Engineer and Architect

    United States - Last active: 6 months ago - Tests: 3

    Diverse Software Professional with a 20+ year successful history delivering a variety of complex solutions. Proven strong programming and leadership skills spanning a large breadth of platforms and hardware environments. Possesses an innate focus on robustness and maintainability, while balancing performance goals and schedule constraints. Excellent written and verbal communication skills with the ability to clearly and concisely convey messaging to both technical or non-technical team members and customers. Consistently demonstrates creative, strategic, analytical problem solving skills with the ability to balance short term tactical against long-term strategic goals.

    $120.00 /hr
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  3. Azamat Galimzhanov

    Azamat Galimzhanov

    Software Engineer

    Kazakhstan - Last active: 03/26/2014 - Tests: 1 - Portfolio: 3

    Experienced Software Engineer. I specialize in rapid development of web applications. Background in game development (including AAA titles) and competitive programming. Previous work experience: - CTO \ co-founder of Inteo (http://www.inteonline.com), an online tool for helping both schools and students to teach and learn. (May 2012 - present) - CTO \ co-founder of Titleshop (http://www.titleshop.co), a market place to sell and buy customizable 3d graphics. (Mar 2014 - present) - Lead developer at GS1 Kazakhstan (http://www.gs1.kz/), building an app dealing with barcodes database at a national level. - Lead developer at TravelEasy (http://www.santufei.com), an online travelling agency. (Aug 2013 - Dec 2013) - CoreTech developer at Demonware (http://www.demonware.net), (Mar 2012 - Mar 2013) Education: - Moderatorship in Computer Science B.A. (Mod), Trinity College Dublin, 2008 - 2012

    $22.22 /hr
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  4. Uladzimir R.

    Uladzimir R.

    Senior Linux System Administrator (RHCE)

    Cyprus - Last active: 08/02/2014 - Tests: 4

    I am an experienced UNIX/Linux/BSD system administrator. In my over 10 years of experience, I have worked with various operating systems and I have encountered many different situations (high loads, web attacks, spam, resource balancing etc.). My area of expertise covers all Linux distributions and all common unix software like LAMP (Nginx, Apache, MySQL, PHP), mail services, TCP/IP, DNS, firewall, bash and perl scripting, backup, high load configurations, cloud hosting (Amazon Web Services).

    $10.00 /hr
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  5. Kirill Suboch

    Kirill Suboch

    Python Developer

    Russia - Last active: 10/22/2014 - Tests: 2

    Hello, my name is Suboch Kirill and I'm a Python Developer. I started my Developer career in 2008 joining the team which developed document management system for my university. Afterwards in 2010 I took a job in design bureau and used my developer skills to automate design and engineering calculations in heavy machinery and engine construction. Since 2013 I became a Python developer in geo information systems (UI and Data Analysis modules). My strong points are creativeness and troubleshooting ability. I believe that every collaboration must be productive.

    $15.00 /hr
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  6. Julius Jefferson Surmeda

    Julius Jefferson Surmeda

    .NET / SharePoint Developer

    United States - Last active: 03/14/2014

    • Accomplished software engineer with more than 6 years of experience specializing in web application development with Microsoft .NET technologies. • Has experience in Agile methodology and Scrum, as well as an extensive background in full software development lifecycle from requirements gathering, analysis, design, development, testing, UAT, production and post-production Support • Proven excellent analytical, problem solving, programming and troubleshooting skills • Recognized and awarded for excellent performance and for high level of dedication and perseverance shown in handled projects. • Strong passion for learning and has outstanding ability to quickly learn and gain proficiency on new technologies, programming languages, tools and software products

    $6.00 /hr
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  7. Andrey Belkin

    Andrey Belkin

    Expert Software Developer with Java and Oracle experience

    Russia - Last active: 6 months ago - Tests: 4

    10+ years of experience in enterprise software development for the last Russian telecommunication companies and Russian goverment. For the last years I've worked for Rostelecom (http://rt.ru) and a lot of other telecommunication companies in Russia. I was the instructor for the Oracle Administration Workshop course, and was the lead developer and the software architect for the one of the most secret organization in Russia: Prosecutor General's Office http://genproc.gov.ru/ (http://crimestat.ru - the public part of our work) and Russian Home Office. Our customers were very demanding, didn't know just simple things in IT, but we found the right way to help them. I like 'Unix way', but in our last projects we have used all the .NET and Microsoft server technologies. If you want to get expertise in enterprise software development, and get the right way to solve problems, I'll help you.

    $40.00 /hr
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  8. Diogo Braga

    Diogo Braga

    Game Developer

    Portugal - Last active: 08/11/2014 - Tests: 2

    Over the course of 6 years, I have developed game mechanic engines in game maker for. I have also made a few games for android using game maker as well and I've done a few applications for windows using Visual Studio. My best skill is making video games using Game Maker and I am looking for opportunities in video game development and desktop application development. I also possess some experience in music composition and vocal singing.

    $3.33 /hr
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  9. Yuri B.

    Yuri B.

    System Administrator / DevOps

    Russia - Last active: 6 months ago - Tests: 3

    8+ years of experience in administration and support of high load projects working on Linux and FreeBSD. My best skills: * Deploy and optimization web projects for high load: - Nginx + PHP-FPM + MongoDB + Redis + RabbitMQ + Elasticsearch; - Nginx + Tomcat + uWSGI-Python + MongoDB + Redis; - Nginx + Apache + PHP + MySQL/Oracle Express. * DevOps&CI: Git, SVN, Mercurial, Jenkins CI, Maven, Sonatype Nexus, Jmeter, Puppet. * Monitoring: Zabbix, Munin, Cacti. * Clouds: Amazon EC2, S3, CloudFront; DigitalOcean. * Virtualization: VMware ESXi, KVM, OpenVZ, Xen. * Collection, aggregation, storage statistics, metrics and logs: Kibana, Scribe, Hive, Graphite. * Backups: Bacula. * Process management: Supervisord. * Clusters and DFS: Haproxy, DRBD, Heartbeat, GlusterFS. * SMS gateway: Kannel. * Common stuff: LDAP, Squid, Samba, Iptables, PF, Exim, Postfix, Dovecot, ClamAV, SpamAsassin, PPTP, DHCP, BIND etc.

    $20.00 /hr
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  10. Zlatin Georgiev

    Zlatin Georgiev

    Developer

    Bulgaria - Last active: 5 months ago - Tests: 8

    I've been programming since 1981 and have fully mastered over 25 programming languages. I've developed my own Java and C++ knowledge bases, an automated system for building management, an ERP system, a multilingual dictionary program, a spreadsheet management system, a cash register system, barcode reading and printing systems, a scales management system, HTTP, TCP and knowledge base management servers, mobile Java games, a Modula-2 antivirus system, a mathematical system for calculating differential equations, a system for process optimization and other software. I have a higher university education of a mechanical engineer.

    $56.00 /hr
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