Top Upwork Freelancers

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  1. Panayotis Tsiamis

    Panayotis Tsiamis

    Senior Systems and Software Engineer

    Greece - Last active: 5 days ago - Tests: 7 - Portfolio: 14

    Systems and Services Engineer, with 12+ years of working experience. Interested in researching, administrating, debugging, tuning and developing platforms running on UNIX like Operating Systems. Able to troubleshoot, identify and solve problems in software, network or kernel layer. Always willing to learn and experiment new technologies for creating high availliability platforms, that could described as "state of the art" or "cutting edge" technology. Specialties: • Unix Like Operating Systems Specialist (Solaris / Linux ). • TCP/IP Network technology • Very deep level of knowledge on Machines hardware and OS Kernels internals. • Troubleshoot/Tune/Debug; System Services, Operating Systems • Mail Services Expert, Qmail-Ldap Specialist. • Network: Cacti/MRTG, Nagios, Cisco Netflow • Databases: PostgreSQL / MySQL / Oracle / LDAP. • Programming: Perl, Ansi C, bash, awk, sed, php etc • Internet Services: mail, http, radius, ftp, ssh, irc etc.

    $30.00 /hr
    412 hours
    0.00
  2. Mohamed Ben Mansour

    Mohamed Ben Mansour

    Business Intelligence Engineer

    Tunisia - Last active: 2 days ago - Tests: 1 - Portfolio: 2

    I have been hired as BI/ETL engineer in Orange Tunisia since August 2013. During this period, I had the opportunity to participate in the following projects: - Implementation of Business Intelligence system for mobile operators - Migration of Talend Open Studio to Enterprise Data Integration 5.1.2 - Migration of Talend Enterprise Data Integration 5.1.2 to 5.3.2 - Back-office processing Optimization and Implementation of generic templates. Skills: -Talend Enterprise Endition (5.3.1) -Oracle (10g/11g) -QlikView

    $15.00 /hr
    400 hours
    0.00
  3. GABRIEL MEDRANO

    GABRIEL MEDRANO

    VMware Systems Engineer

    United States - Last active: 2 days ago

    • Design and administration of VMware vSphere 4 & 5 Enterprise Plus hosting 1000+ Linux and Windows virtual machines on hosts across multiple sites • Design and configure VMware vSphere 5 components such as High Availability (HA), Distributed Resource Scheduler (DRS), vMotion, Distributed Virtual Switch (DVS), Host Profiles, Storage I/O Control (SIOC) and Network I/O Control (NIOC) • Design and administration of Lab Manager 4.x to support 400+ virtual machines • Understanding of SAN architecture and implementation as it relates to virtualization (NetApp, IBM XIV, EMC Clariion and VMAX) • Design and Administration of 25+ HP C7000 blade chassis, Virtual Connect Flex-10 configuration in support of Linux, Windows, and VMware blades • Citrix XenApp 5 & 6.5 (Windows 2003/2008) administration hosting 90+ applications utilizing Web Interface , Netscaler, and SQL datastore backend for internal and external customers • Design and Administration of Citrix XenDesktop 5.5 integrated with XenApp, Netscaler, and Access Gateway • Citrix farm consolidation and decommission • Create and manage Active Directory and Group Policy Objects to include DNS • All manners of Windows 2003 and 2008 Windows Server administration • Produce processes and procedures for system administration • Troubleshoot and resolve utilizing analytical skill set amongst a distributed and complex environment to include DNS, Firewall, Active Directory, SMTP, TCP/IP, and various network related issues • Excellent communications skills and rapport with fellow teammates. Ability to work as a team or independently

    $88.89 /hr
    131 hours
    0.00
  4. Daniel B.

    Daniel B.

    Full Stack Startup CTO: Coder | DevOps | QA | Cloud

    Canada - Last active: 4 days ago - Tests: 1 - Portfolio: 1

    B"H I'm a software developer turned entrepreneur with an irrational desire to solve life's big problems using technology. I've been fascinated by programming and computers since age 14, and have a rich experience of over 15 years with a diverse set of software technologies. As CEO/CTO of a tech startup, I am the kind of generalist that is a jack of all trades and a master of all. On any given day of my week I need to be an excellent developer, tester, copy writer, marketing strategist, media expert, business and financial wizard, all while keeping the big picture and "vision" of the company in mind. Let me apply myself to your problem. Bring me onboard your team, and I will get the job done with spectacular results. I stand behind the quality of my work, the efficiency at which it is delivered, and the easy to maintain nature of my deliverables. SPECIALTIES Linux system administration (Ubuntu, Apache, MySQL, ElasticSearch, Sphinxsearch, RabbitMQ, ...) Clustered environments (CoreOS, Fleet, etcd) Containerization (Docker) Docker workflow design (containerizing environments for dev, staging & production for apps built in any language: PHP, Node, Ruby, Python, Haskell, ...) Cloud environments (AWS) Cloud migration (SoftLayer -> AWS, ...) Shell scripting (advanced Bash) Software development (PHP, C++, JavaScript, CSS3, HTML5) Configuration management (Puppet) Quality assurance (Selenium, PHPUnit) Continuous integration (Jenkins, Strider) Continuous deployment Monitoring and metrics (New Relic, Logstash, Kibana, Grafana, Graphite, Nagios, Seyren) User interface and user experience design (UI/UX) Product functional design and functional flow mapping Technical strategy Technical team building and leadership WORK ETHIC Development: Make it work, make it correct, then make it fast. Move quickly and break things, because better to get it into the user's hands than keep it in the engineer's head. Design: Less is more – remove decision points until it works like magic. Delight users at all costs with insane attention to detail. Quality management: Instrument all the things, since it's harder to improve what isn't being measured. If it's not being tested, it's already broken. Productivity: If it has to be done more than once, automate it; in a startup, don't automate for as long as you can. Refactoring should be opportunistic and shouldn't need management approval, because the broken windows syndrome in a codebase can bring a project to its knees. Technical strategy: Embrace valuable new things even if they're still half-cooked; the developers will usually work hard to smooth any bumps with surprising speed. Never throw out something that works just because something new came out; technology evangelism is an expensive sport. Management: Mentorship is key to developing the culture and organizational processes that will keep employees happy and increase their value to the company. Communicate the rules clearly, set the goalposts, then get out of the way and let the team shine. Exude passion or stay home. Leadership: Listen to and learn from everyone. When making decisions there is never enough information, and once there is it is usually too late. Grand plans tend to become obsolete before they are implemented, and old habits die hard; changes are most successful when they are small. KEYWORDS I've picked up many other skills over the years, so for easy reference and searchability on oDesk here is the keyword soup (in no particular order): ajax, json, api, html, css, smarty, zend framework, virtualbox, virtual machines, amazon cloud, dns, ftp, nagios, c++, eclipse, xdebug, software profiling, software optimization, software architecture, refactoring, software patterns, agile, test driven development, lean startup, minimal viable product (MVP), REST and RESTful design, software defined datacentre, continuous deployment, push to build, immutable infrastructure, redmine, project management, static code analysis, debugging, quality assurance, QA, testing, software verification, version control, subversion, power excel formulas, windows, macos, mac os x

    $155.56 /hr
    402 hours
    0.00
  5. Dimitar S

    Dimitar S

    System architect

    Macedonia - Last active: 2 days ago - Tests: 3

    My 7 years of professional experience are spent working on database design, data integration, object oriented solutions, ORM and database performance tuning in the ERP area. I have great experience developing apps with Python and Delphi. I have very strong skills with the relational database technology, specifically MS SQL SERVER 2005, IBM INFORMIX 11, MySQL and Postgre.

    $20.00 /hr
    1,143 hours
    0.00
  6. Mitchell Langlois

    Mitchell Langlois

    Full-stack rails developer

    Canada - Last active: 1 day ago - Tests: 3

    I have designed and developed a variety of websites using HTML5, CSS3, Ruby, Ruby on Rails, Javascript, JQuery, Backbone.js and many other modern web technologies. I also have a bunch of experience designing and working with databases and am very proficient with SQL. I love to build new websites from the ground up using my already acquired skills and trying out new technologies when acceptable. I am seeking opportunities to build modern, fully-functional websites from start to finish. I prefer to work in small teams or alone.

    $40.00 /hr
    755 hours
    0.00
  7. Herman Beltran

    Herman Beltran

    Philippine MCSE|MCSA|CCNA

    Philippines - Last active: 4 days ago - Portfolio: 7

    IT Professional with 10 years working experience while possessing developed skills that have been gained through establishing and developing IT projects, networks and infrastructures. Experienced covers customer liaison, design, testing to successful implementation within budget, scope, timescales and process limitations. Extensive LAN, WAN, Hardware, Software experience. Working cross-functionally within a customer focused, multi-site environment, maintaining the delivery of IT services and technology projects. Up-to-date on IT developments.

    $11.00 /hr
    1,668 hours
    0.00
  8. Vitaliy Tyunisov

    Vitaliy Tyunisov

    .Net Solutions Developer

    Ukraine - Last active: 1 day ago

    I am an innovative, highly technical software professional with more than 5 years of experience in C# and .NET. By far, I have been involved in many projects for high-profile clients. My additional skills include providing project architecture, data transferring, multithreading, ability to develop high-loaded web servers, and working with web load balancing. Successfully passed Microsoft certification: • Exam 70-515 TS: Web Applications Development with Microsoft .NET Framework 4 • Exam 70-516 TS: Accessing Data with Microsoft .NET Framework 4 • Exam 70-513 TS: Windows Communication Foundation Development with Microsoft .NET Framework 4 • Exam 70-519 Pro: Designing and Developing Web Applications Using Microsoft .NET Framework 4.0 • Exam 70-480 Pro: Programming in HTML5 with JavaScript and CSS3 • Exam 70-492: Upgrade your MCPD: Web Developer 4 to MCSD: Web Applications

    $12.00 /hr
    818 hours
    0.00
  9. Kartik Bhatt

    Kartik Bhatt

    Project Manager

    Singapore - Last active: 1 day ago - Tests: 2

    - An astute professional with 7+ years of Project Management experience and a total of 13 years experience including 8 years of hardcore programming. - 6+ years of diverse experience in Project Management focusing on Project Scope, Planning, Time Management, Resource Management, Costing and Risk Management. - A total of 12 years of experience includes Project Management, Project Coordination, Client Management, Process Management, Software Process Development, Design & Implementation, Quality Assurance, Software Engineering, Programming - Handed projects for clients like SPRING Singapore, APEC, IRAS, Singapore Sports, AVA, Science Centre Singapore, Pan Pacific Hotels Group, Ascott Group, Guoman & Thistle, Marco Polo etc - Currently associated with Nanosoft Business Systems Pte Ltd. - Experienced in Vendor Management, Monitoring and Control, Change Management and Quality Management for small and big projects. - Resourceful, quick and creative problem solving experience with proven track record to analyze and translate complex requirements and business problems into innovative custom solutions.

    $30.00 /hr
    1,743 hours
    0.00
  10. Andriy K.

    Andriy K.

    Web development / WordPress development / Front-end development

    Ukraine - Last active: 5 days ago - Tests: 2 - Portfolio: 10

    I am Web developer, WordPress developer, front-end mobile developer with 5+ yrs of experience. Responsive web sites for any display resolution and any difficulty. My main goal is qualitatively performed work and the happy client. All my works is always have a highest quality. Offer: - multi-screen - cross browsers capability - pixel perfect - W3C validation - rightly structured and SEO friendly markup - highest quality, clean and full commented code - Wordpress guru - perfect knowledge Photoshop, Illustrator Why me? - quick - responsive and reliable - 5+ years experience with professional teams and big projects - short response time (skype & email) - many happy employers I`m ready to work with you!

    $17.78 /hr
    21 hours
    0.00