Top Upwork Freelancers

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  1. Cristian Santiago

    Cristian Santiago

    Infrastructure Administrator(esp. Windows) and Expert Problem Solver

    United States - Tests: 3

    I have been working on IT for almost 15 years now. I am a generalist, a problem solver. I have more experience on Windows Infrastructure but I do also get along pretty well with Unix environments. I have worked for Microsoft Enterprise Support, then continued working as infrastructure administrator for other companies. I have experience in different kinds of Technology and even if I don't have, I can pick it up really quick, my mind seems to be wired up that way.

    $22.22 /hr
    0 hours
    0.00
  2. Jawad A.

    Jawad A.

    ROR,PHP/MySql, AJAX Developer

    Pakistan - Portfolio: 5

    I'm an experienced and ambitious developer looking for a challenging new role in the IT industry with the opportunity to work with the latest technologies on challenging and diverse projects. Experience in front end development technologies including advanced HTML/XHTML, XML/XSLT, CSS, DHTML, JavaScript (cross-browser and cross-platform compatibility), AJAX , JQuery , PHP , MYSQL , WORDPRESS , CodeIgniter , Yii , Laravel, Ruby on Rails and Different API's) Demonstrated understanding of web usability, web accessibility standards, web 2.0 technologies and design principles.

    $11.11 /hr
    5 hours
    0.00
  3. Oleg Zaremba

    Oleg Zaremba

    JavaScript Developer

    Ukraine - Tests: 1

    Strong knowledge of C++ (Object oriented programming, patterns, Standard template library (STL), Windows API), Ruby on Rails, MySQL, HTML, CSS(Twitter Bootstrap), Javascript (jQuery, Underscore.js, Backbone.js). Good knowledge of C# (Windows Forms and Silverlight); Jasmine and RSpec testing; Unicorn, WebBrick, IIS and Apache servers; GitHub, Heroku, PostgreSQL; Languages : Ukrainian (mother tongue), English (fluent), Russian (fluent), German (intermediate), Polish (intermediate); Leadership, communication, ability to work in a group; International volunteer (Germany, Berlin, 2011, 3 weeks; Spain, Barcelona, 2012, 2 weeks; Italy, Pigna, 2012, 2 weeks; Germany, Nagold, 2013, 2 weeks; Estonia, Tallinn, 2 weeks);

    $14.00 /hr
    0 hours
    0.00
  4. Denis Chernov

    Denis Chernov

    QA Engineer

    Russia - Tests: 1

    Hi. My name is Denis Chernov. I have over 5 year of software testing experience. Last two years I'm working as team-lead of testing departure. Listed below are my skills and abilities: Organization and control of testing product process. • Testing plan and test cases creation and correction • Participate in development of software requirements and planning of new functionality testing • Evaluation of risks and testing coverage Testing execution • Execution of functional testing in various environments (OS, browser etc.) • Bugs detection and specification • Communication with developers, doc team, management Organization of team working • Distribution and control of tasks realization • Team working results reporting • Monitoring and organization of compatibility testing Professional skills • Networking, TCP/IP stack, routing, VPN • Mobile devices, BYOD solutions for iOS, Android and WP devices • Testing Methodologies • Deployment, configuration and administration of operation systems: Windows, Linux, Mac, Android, iOS • Virtualization • Some experience in automation testing using Java and Selenium

    $10.00 /hr
    0 hours
    0.00
  5. Denis C.

    Denis C.

    Expert System Engineer

    Moldova - Tests: 9

    PROFILE – A self-motivated and committed system administrator with exposure to a wide range of technical areas, focused on delivering best experience to the end-users – Nine years of experience in administering business–critical application stacks such as banking software, middle-ware, billing systems, Telecom-specific applications; troubleshooting complex issues, managing both production environments and databases of highly respected companies – Performed upgrades planning, software developing and documenting the knowledge – Highly adaptable and quick to learn new skills – Six years of customer service experience MAIN TECHNICAL SKILLS O/S: HP-UX, SunOS, AIX, RedHat, CentOS, Debian – installation/configuration Software: MySql Server – installation/configuration Apache Web Server – installation/configuration Nginx – installation/configuration Apache Tomcat – installation/configuration Redhat JBoss Application Server – maintenance Oracle WebLogic Application Server – maintenance Oracle Tuxedo – maintenance Oracle Database – maintenance CVS – codebase maintenance HP Quality Centre – configuration/maintenance SSH Server – installation/configuration Telecom–specific Billing Applications (Amdocs Ensemble, Oracle BRM) – maintenance Oracle VM VirtualBox – installation/configuration Languages: Python – 1.5 years Perl – 3 years AWK – 4 years Shell Scripting – 5 years SQL (mysql and Oracle) – 4 years Java – 0.5 years PROFESSIONAL EXPERIENCE – Billing System Engineer, Team Lead (3 persons in submission): 2010 - 2013 – Software Developer: 2008 – 2010 – Senior System Engineer: 2003 – 2008

    $16.67 /hr
    0 hours
    0.00
  6. Diogo Braga

    Diogo Braga

    Game Developer

    Portugal - Tests: 1

    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. I also possess experience in java and c/c++ development, whether it's an application based for consumer purposes or a scientific-driven development. 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
    0 hours
    0.00
  7. Victor Esquenazi

    Victor Esquenazi

    Expert Access Developer

    United States - Tests: 1

    Over 10+ years experience producing MS Access database applications for bookkeeping, manufacturing, and QuickBooks. * Importing and exporting data to company's Quickbooks file. * Background education in finance and accounting * Creative mind with expertise in workflow and business solutions Creator of OrderUp™ - Designed For Use With Quickbooks® . This is an MS Access application connecting directly to a company's QuickBooks file using QODBC. A free trial is available for download on my website at www.vdatasolutions.com OrderUp™ is the simplest way to enter invoices, estimates, and sales orders directly into QuickBooks®. OrderUp™ uses your company’s existing list of customers and items. No need to manually enter written orders into QuickBooks® with OrderUp™.

    $44.44 /hr
    0 hours
    0.00
  8. Lennin David Hernandez Nieto

    Lennin David Hernandez Nieto

    Python Programmer

    El Salvador - Tests: 2

    Programmer with experience in .NET , Java, Python (Django, Google App Engine, OpenErp, GTK and Qt), SQL Server, PostgreSQL, MariaDB and MySQL technologies. Excellent at developing, implementing, maintaining and managing applications and information systems. Strong experience in system analysis, requirement engineering, system design, etc. I Love to learn new topics, trends and technologies, self-teaching student with knowledge about, performance, security in information systems, financial accounting, financial maths (interest rates, loans, payment series). I am fast-learner, i have good communication skills via email and video-conferences, I use git source control management, but can learn others scm if needed. I study information system engineering, with a few classes missing to graduate. I have worked as a freelance programmer with a travel agency the last 2 years.

    $14.44 /hr
    0 hours
    0.00
  9. 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
  10. 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