Top Upwork Freelancers

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  1. Alex Rocon

    Alex Rocon

    Mobile application development

    Bangladesh - Tests: 3 - Portfolio: 7

    I am a mobile application(iphone, android, windows phone) developer. I was doing GIS mobile application development. After that i involved in a product SkyBIZ. Mainly i am a local wireless solution provider that can provide sales man tracking, sales data analyzing, GEO analysis on sales data and some others tools that supports sales department of a business organization. Now i am trying to explore it in the global market.

    $11.11 /hr
    54 hours
    4.60
  2. Rudolf De La Cruz

    Rudolf De La Cruz

    VOIP Expert

    Philippines - Tests: 1

    Work History Ring Central (Mandaluyong City) (2010- Present) Tech support T2 (ASG Floor Support)  As a Technical Support Engineer I provide high value implementation and support to our largest enterprise customers.  Self-motivated with the ability to dive right in, be effective and make a difference  Delivering value to customers by helping them get the most out of their RingCentral service.  Helping them setup and optimize their hosted PBX solution to meet their business needs.  Troubleshoot their network, router, firewall and ISP connections to optimize their VOIP quality of service.  Apply expert knowledge of RingCentral services, VOIP technology and networking hardware and software  Provide premium implementation and technical support to RingCentral’s largest customers  Plan, design, install, maintain, troubleshoot and repair RingCentral’s solutions  Understand network architecture required to support RingCentral’s VoIP services  Recommend network hardware, software and design elements  Answer difficult technical questions, solve technical problems and suggest appropriate workarounds  Utilize network performance monitoring tools to isolate and root cause issues  Provide quick and accurate handling of support interactions – phone, chat, screensharing, email.  Experience with VOIP technology and terminology including SIP, RTP, QoS, COS, CDR.  3+ yrs experience in customer focused role - post-sales technical support  Experience configuring, updating and supporting VOIP solutions in a multi-location environment.  Ability to work efficiently in a highly demanding, team-oriented and fast paced environment

    $10.56 /hr
    440 hours
    4.72
  3. Maciej C.

    Maciej C.

    Certified Microsoft SQL Server/BI Specialist

    Poland - Tests: 3

    I'm Microsoft certified professional with 7 years of experience related to SQL Server. I was working in all aspects of development within SQL Server. Initially I started as relational database developer and successfully I was moving more into Business Intelligence part of SQL Server. Currently I work as senior data warehouse developer on permanent basis in UK. To my responsibilities belong business requirement gathering, data analysis, data modeling and then developing SSIS packages and SSAS cubes.

    $33.33 /hr
    233 hours
    5.00
  4. Steven Stovall

    Steven Stovall

    DevOps, Cloud (AWS/Google), Security. Development: Rails/Python/PHP

    United States - Tests: 2

    I enjoy solving challenging problems and utilizing technology to creatively design efficient, cost-effective solutions to meet business needs. Current Certifications: CISSP, CCNP, Net+/Sec+, MCP Cloud (AWS/Rackspace), Linux, Windows, VMware HA/vMotion/vCenter Open Source Software: Apache, nginx, Redis, elasticsearch, Zabbix, Logstash Information Security Auditing, Configuration, Policy Networking: Visio Diagrams, IPSEC/SSL VPNs, OSPF/EIGRP/BGP, Adaptive Security Appliances (ASAs), Wireless Controllers, F5 LTM, WiFi (RF Design) Information Security: Visio Diagrams (architecture), PCI DSS compliance, Splunk (syslog) Vulnerability Audit and Penetration Testing: Metasploit, Nexpose, Nessus, Vulnerability Reporting, Patch Management Development: Ruby/Rails, Git, Python, PHP, Perl, PowerShell, Bash, .NET

    $67.00 /hr
    55 hours
    5.00
  5. Ayaz Ashrapov

    Ayaz Ashrapov

    Software test engineer

    Russia - Tests: 4 - Portfolio: 1

    I'm a software test engineer and I'm specializing on test automation. Below you can find list of tools that I'm using every day: Selenium WebDriver, JMeter, SoapUI, Atlassian Bamboo, Jenkins, Cucumber. I write code for my tests in Java using JUnit test framework. I'm also experienced in distributed testing using cloud solutions like SauceLabs and BlazeMeter.

    $16.67 /hr
    186 hours
    5.00
  6. Dima Q.

    Dima Q.

    Certified Oracle enterprise content management-ECM

    Jordan - Tests: 2 - Portfolio: 2

    To make a sound position in corporate world and work enthusiastically in team to achieve goal of the organization with devotion and hard work. and earn a job which provides me job Satisfaction and self development and help me achieve personal as well as organization goals.,Specialized with oracle products configuration and installation such as Primavera p6 ppm,P6 Eppm ,p6 contractor ,contract management ,weblogic,oracle database , oracle ecm ,ucm ,webcenter content .

    $66.67 /hr
    184 hours
    5.00
  7. Nguyen V.

    Nguyen V.

    C/C++ Developer

    Vietnam - Tests: 7

    I am a real software engineer, I write programs for programmers, not computers. Over the last 9 years, I have developed a wide range of applications using C, C++, C#, Python, Perl, Java on Windows, Unix, Linux platform as well as developing software tools and some handy scripts. I also have some experience in the following areas: C, C++ (C++98, C++11, C++14), Bash, SQL, PL/SQL, POS, ATM protocols (NCR, ISO8583...), SMS, SMPP, SMTP, POP, SNMP, Human Interface Device (HID), VISA/MC Interface, Thales HSM, Video Processing, MPEG-2 TS, HLS, DASH, Wireshark Dissector, Subversion, Git, Clearcase, Oracle, MySQL, CVOPS framework, PyQt, Scrapy framework, OpenSSL, RSA Cryptography, HTTrack, FAT32, NTFS... I'm fast learner and keen to learn new technologies. I'm looking forward to work with you!

    $25.00 /hr
    124 hours
    4.99
  8. Aaron H.

    Aaron H.

    Cisco UC Specialist/Expert - 10 Year CCIE

    United Kingdom - Tests: 3 - Portfolio: 2

    A specialist in the full range of Cisco Unified Communications with full CCIE Voice qualification dating back 10 years, and over 15 years experience in IT primarily as a Cisco Channel Partner lead engineer in the UK. Strong design, deployment, administration, development and troubleshooting skills in: Communications Manager (CUCM/CallManager from version 3.1 to 10.5) Communications Manager Express Voice Gateways (TDM, Analog), CUBE/SIP, H.323 Contact Centre Express (UCCX/IPCC Express) Scripting, Deployment and Custom Reporting with Historical Reporting Client (HRC) and Cisco Unified Intelligence Center (CUIC) Presence/Jabber, Unity (Voicemail, Unified Messaging) Cisco UCS and VMware Unified Attendant Consoles (CUBAC, CUDAC, CUEAC, Attendant Console Advanced/Standard, and ARC Premium) I also have extensive networking experience, as well as significant experience with Microsoft Windows Server/Exchange and associated technologies and products. I have development skills in Java, MS SQL and Informix and various other scripting and programming languages such as PowerShell. I have experience with many Cisco-specific APIs especially with UCCX and CUCM.

    $100.00 /hr
    219 hours
    5.00
  9. Diwas Pathak

    Diwas Pathak

    Experienced Java Developer

    Nepal - Tests: 2 - Portfolio: 4

    I've been in the web/mobile development field for more than 6 years. When I started developing JavaEE applications for a local company. I've worked on a variety of applications using numerous frameworks like struts, spring MVC, hibernate,JSF,etc. Most of my web application has been developed using MVC design pattern. I am able to not only build applications from the ground up but also to add functionalities to existing application, open source and commercial applications. As an experienced Developer i give special attention in the security and understand risk involved in web application. Apart from being a web developer I am also a experience with databases like MsSql, MySql,CTree,etc. Besides this I use to teach Java courses to professional working in other companies and Engineering students.

    $12.22 /hr
    131 hours
    4.77
  10. Ruben Semerjyan

    Ruben Semerjyan

    Inovative Mobile VOIP, Social, Audio/Video Streaming Developer

    Armenia - Tests: 2 - Portfolio: 1

    I am an innovative, extremely detail oriented and perfectionist Software Development Architect, with expert knowledge in VoIP, audio/video streaming and processing, messaging and social media. My a little over 8 years of experience in VoIP industry gave me a strong knowledge of the protocols, technologies and available solutions. 3 years of successful mobile applications development, architect and project management gave me confidence in creating robust and technologically challenging applications. I am passionate about developing robust, innovative and leading edge applications, getting increasingly challenging assignments and applying disruptive technologies. Looking for a work on technologically challenging projects (in an agile environment preferably), while offering my expert knowledge base, ability to learn quickly and apply new techniques. I usually bid slower than others, because of reading the full job description, trying to estimate all requirements, needed technologies and solutions.

    $25.00 /hr
    28 hours
    5.00