Top Upwork Freelancers

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  1. Aleksandr Kondrik

    Aleksandr Kondrik

    Senior iOS Developer

    Russia - Last active: 22 hours ago - Tests: 5 - Portfolio: 7

    Hello, With 3+ year of experience in I get expertise in iOS and .Net development. I love develop apps. I like complex and diverse assignments that keep my mind sharp and allow me to constantly learn new things. Have some apps in AppStore: 1) iDrom - mobile client for site www.drom.ru 2) Autoservice 717 - business application for car service

    $33.33 /hr
    255 hours
    5.00
  2. Khoa Nguyen

    Khoa Nguyen

    DevOps

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

    - Have experience about managing big system about 300 server . - Infrastructure as code with Ansible, Chef. - Use Docker to Continues Deployment - Build Continuous Integration and Continuous Delivery System by Jenkins, Ansible , Docker - Programming languages: bash shell, Python, PHP, Ruby - Config, manage open source such as mysql, apache, nginx, memcached, redis , vagrant , docker ... - High available with fail over and load balance. - Monitor system with New Relic or Zabbix tool - Have experience with Amazon web service : EC2, S3, Route 53, Elastic Cache, Auto Scalling , ELB and Digital Ocean

    $21.99 /hr
    70 hours
    5.00
  3. Maciej Klepaczewski

    Maciej Klepaczewski

    Web Performance Optimization Engineer

    Poland - Last active: 22 hours ago - Tests: 2 - Portfolio: 2

    I specialize in Website Performance Optimization (WPO). In particular I do: * MySQL optimization, * PHP optimization, * HTML/JavaScript/CSS related optimizations. I can guarantee page loading times in range of 1-3 seconds or less. I also have experience in web scrapping and handling large amounts of data (where by big data I mean at least dozens of gigabytes). I have masters degree in Computer Science from Wroclaw Technical University. I'm experienced programmer with 15 years of experience (I coded my first software in high school).

    $80.00 /hr
    873 hours
    5.00
  4. Mikhail Olshanski

    Mikhail Olshanski

    Expert Java and Android developer

    Russia - Last active: 4 days ago - Tests: 1

    Hello I'm a professional Java and Android app developer with more than 3 years of full-time professional experience. My goal is to provide fast and clean product that meets my client's needs. I have successfully completed complex Java projects using Liferay Portal, Spring framework, Play Framework, Mule ESB and other technologies and frameworks and quite some Android projects including NDK-based ones and with use of tools like parse.com or Realm DB or Android Support Library. Also, I have experience with JS frameworks: Angular, AUI and Jquery, as well as as with plain JS.

    $15.00 /hr
    175 hours
    4.70
  5. Muhammad usman R.

    Muhammad usman R.

    Web Developer / Front end Expert / UI/UXD Expert

    Pakistan - Last active: 5 days ago - Tests: 2 - Portfolio: 3

    Over the last 5 years, I have developed a wide range of websites and web applications using PHP, Jquery, HTML5, CSS3, Mobile Landers, Responsive HTML without and with any framework, Bootstrap, Zurb foundation, Gumby, Javascript, Wild Apricot, Squarespaces, Wix Wbsites from Scratch, Expression Engine and Restful web services implementation with PHP and MYSQL, WordPress, Joomla, Mobile App design and development for startup companies and small businesses. I always prefer quality in my work. The satisfaction of my client is important for me.

    $23.00 /hr
    47 hours
    5.00
  6. Stephen Underwood

    Stephen Underwood

    Unity Developer

    United States - Last active: 12 days ago - Portfolio: 1

    I'm a Unity3D developer that works with clients to bring projects from conception to launch. I work on both small and large projects with client teams or provide a team if needed. My specialty is mobile development for casual games that contain social and ad network monetization strategies. A few of the things I've done recently are: - Create RPG Leveling System - Create Ranking/Leaderboard System - Create In App Purchases - Ad Network Integration - Analytics Integration - A/B Testing SDK Integration - Social Feature Creation & Integration - Multiplayer Creation Using Photon As well as being a Unity developer, I'm a trained 3D artist. If additionally needed for a project I'm able to create art.

    $20.00 /hr
    1,532 hours
    5.00
  7. Bhushan Katariya

    Bhushan Katariya

    Microsoft Windows and Exchange Analyst

    India - Last active: 1 month ago - Tests: 3

    A Highly motivated and result-oriented individual with over 10 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.

    $13.33 /hr
    316 hours
    4.83
  8. Alexey Nashchekin

    Alexey Nashchekin

    C# Developer

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

    I have about 5 years programming experience working with .Net technologies. I am an expert in .NET (C# and VB.NET) and SQL Server. I also have some projects on other DB platforms, such as Oracle. I have MCPD certificate in Web Development. I have created web applications using both webforms (asp.net) and MVC3. I have created some desktop projects, using winforms. My experience include various web applications using MVC3 and C# and asp.net. I am an expert in using and customizing Umbraco CMS, including developing extensions for it. I am mostly interested in developing backend and database functional for applications, though I can do most frontend tasks just fine.

    $25.00 /hr
    80 hours
    5.00
  9. Jesus Enrique Gutierrez Cortazar

    Jesus Enrique Gutierrez Cortazar

    Senior Software Developer

    Mexico - Last active: 1 month ago - Tests: 5

    I'm a full-stacl software developer. I use to follow and implement code standards and also to audit and modify code for a better performance, knowledge and understanding. The best part is that i love what i do as i live for it. It's like i'm beeing payed for having lots of fun. Wait, that's true in fact!!! I love technology and development innovation and i when i'm sleeping i dream about code, implementations and deployments. I have experience developing professional enterprise software solutions under many technologies, mainly with Java and Ruby On Rails. I have good written and verbal english communication skills. I consider myself as proactive, responsible and can be part of any team work. It doesn't matter what's the problem to solve or what's the programming language to solve it, i can learn it and will solve it in the best possible way.

    $22.22 /hr
    1,413 hours
    5.00
  10. Diaa Sami

    Diaa Sami

    Professional C++ Developer, Software Engineer, Computer Wizard

    Egypt - Last active: 1 day ago - Tests: 18 - Portfolio: 9

    I am an ambitious and established software developer who started development in highschool, I'm fond of graphics and interactive applications in general and the open-source philosophy. I have used several programming languages, frameworks and APIs, including but not limited to C/C++, .NET, Java and Python, wxWidgets, OpenGL, Win32, COM and sockets, I've programmed for several platforms ranging from hand-held devices to Desktops(Windows and Linux) and client-server applications. I'm always interested in challenging jobs.

    $27.78 /hr
    2,086 hours
    4.99