C Developers & Programmers

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On average, 169 C projects are completed every quarter on Upwork.

169

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C Upwork freelancers typically receive a client rating of 4.71.

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Last updated: May 1, 2015
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  1. Rogerio R.

    Rogerio R.

    Hardware/Firmware/Software Engineer

    Portugal - Last active: 1 day ago - Portfolio: 1

    I am a 40-year old electrical engineer with a passion for sophistication and innovation. I have a lot of experience in many areas, a result of both my professional career as well as my own personal projects. Detailed profile information can be found at http://profile.rilhas.com I can design, test, and manufacture hardware (including PCBs) using microcontrollers, FPGAs, USB, UART, I2C, and many more, and integrate them with computers, embedded systems, mains power, motors, various sensors, etc.. It is not uncommon for hardware projects in which I’m involved to incorporate both firmware and software, or even connect to the internet or with mobile phones. I have a lot of experience in the PC world, both as a user and as a developer. I have developed high density ISDN telephony application servers (IVRs) for the main Portuguese telecom operator, with an installed base of over 2000 channels, including a voice mail system complete with voice and text fault-proof database. I have developed a large number of computer systems, both servers and clients. My work with IVR's later included testing and using various ASR and TTS technologies (for automatic speech recognition and automatic speech synthesis from the major providers like Loquendo, Nuance, Philips), applied to various areas from the IVR system themselves (directory assistance, flight booking, and more), a help support system for the elderly (consisting of an emergency telephone help server for the national Red Cross), all the way to systems for the hearing impaired (integrating with JAWS screen reader, for example). I have worked with a team to develop a tool for airport management systems, where my contribution was the development of a complete graphics subsystem based on OpenGL, which is being used up to this date (more than 10 years later), due to its capabilities not having yet been surpassed by the competition. I've developed technology to analyze video images and detect a large number of situations, including FOD at an airport in Açores, intrusion detection, early fire warning systems (marketed as CICLOPE), fire prevention systems at PORTUCEL (one of the main producer of paper and other products), illegal car parking, subterranean bus parking, automatic lane management (and infraction detection) on the 25 de Abril Bridge, and many more. I also developed technology to monitor and track bird movements using radar data. A first version used the radar image, and a more recent version uses the raw radar data (captured using a high speed data acquisition system that I also developed specifically for the radars being used). Since this system requires the display of large amounts of data (images with 30+ MPix) I also developed the visualization component (based on OpenGL). I also have some experience in CAD modeling (owing mainly to the fact that I've owned a 3D printer for several years), with which I have created numerous models for small production runs of plastic objects, mainly to assist with electronics projects but which I have also used successfully to create inexpensive plastic connectors and other components for a company that manufactures and installs solar pool heating systems, including automated 2" valves. I’ve also created custom shaped plastic cookie cutters for my wife and toys for my son. :-) I've produced several promotional 3D videos for a few companies, and I also recorded and produced music albums for a number of artists. The systems I have developed in the past make use of (of have integrated with) a wide range of languages, systems, and technologies, including C, C++, C#, JAVA, J2ME, Android, Javascript, Ruby, PIC 10/12/16/24 assembly, i386 assembly, MMX/SSE2, Verilog, TCP/IP, UDP, OpenGL, USB, WiFi, Bluetooth, Raspberry Pi, BeagleBone Black, Windows, Linux, POTS, ISDN, ASR, TTS, among many others. Many of the projects I've worked on have included other people, and I have been the project manager on most of them. For the larger projects where I was not the project manager (like those involving airport security, for example) I was the team leader of the corresponding project component. Given my extensive experience with complex and innovative projects (where a solution is not always obvious from the start and a great deal of creativity is need as the project progresses), I have also developed good skills and intuition for preventing and detecting bugs, both at a code testing stage as well as (more importantly) at a design or specification stage. These skills have proven crucial over the years, and I think that the success of all the projects I worked on depended heavily on them.

    $40.00 /hr
    68 hours
    0.00
  2. Arnoud D.

    Arnoud D.

    DevOps Engineer

    Netherlands - Last active: 7 hours ago - Tests: 4

    I'm a Linux professional with over 10 years of experience. I've studied software engineering and became a sysadmin, the two of which I still combine by automating repetitive tasks and integrating systems. At my current job I'm working as a DevOps Engineer implementing Puppet for our managed servers. Besides brewing code I also like to brew my own beers. Specialities: Puppet, Ruby, Configuration Management, Linux, Ubuntu, Redhat, Mac OS X

    $40.00 /hr
    7 hours
    0.00
  3. H Albano

    H Albano Agency Contractor

    PhoneGap Developer

    Uruguay - Last active: 1 month ago - Tests: 4 - Portfolio: 26

    Over the past 4 years, I have developed a wide range of apps (both PhoneGap and iOS) websites and games. My specialty is comprehensive work, developing everything from scratch, through Project Management. Some of my work includes: - PhoneGap development - iPhone Application with Google App Engine Backend - 3D Graphic Artist & Web Game Design I'm now seeking opportunities that will allow me to develop my professional skills by providing creative and high quality solutions to my clients. I enjoy new challenges on a daily basis, looking to overcome my own high standard goals.

    Associated with: CodigoDelSur Agency

    $61.11 /hr
    195 hours
    0.00
  4. Sean Gilligan

    Sean Gilligan

    Software Developer

    United States - Last active: 04/25/2014 - Tests: 1

    • Networking and Distributed Systems expert • Knowledge of Bitcoin and Cryptocurrency Internals and Economics * Web Application & Web Services Developer: Java, Spring, Groovy • Mobile Developer - iOS/Cocoa and HTML5 • Front-end Developer AngularJS, Backbone, iUI, and others • Mac OS X Developer • Broad and deep technical background (from transistors to scripting languages)

    $116.67 /hr
    19 hours
    0.00
  5. Fabrizzio S.

    Fabrizzio S. Agency Contractor

    Mobile Developer

    Uruguay - Last active: 10/20/2014 - Tests: 6 - Portfolio: 30

    Over the past 5 years, I have developed a wide range of apps, websites and games. My specialty is comprehensive work, developing everything from scratch, through Project Management. Some of my work includes: - Java Developement for Custom Web App - iPhone Application with Google App Engine Backend - 3D Graphic Artist & Web Game Design I'm now seeking opportunities that will allow me to develop my professional skills by providing creative and high quality solutions to my clients. I enjoy new challenges on a daily basis, looking to overcome my own high standard goals.

    Associated with: CodigoDelSur Agency

    $61.11 /hr
    42 hours
    0.00
  6. Alexis Baroody

    Alexis Baroody

    Programmer

    United States - Last active: 1 month ago

    • Been professionally programming for 11 years • Experience with C/C++, Java, Javascript, Ruby, SQL • Managed and programmed projects that included building games, research, data collection • Rubymotion and iOS development expertise • Worked on Rails and Javascript web projects • Published iOS apps including the game Tilt Defense (itunes.apple.com/app/id923794667)

    $35.00 /hr
    21 hours
    0.00
  7. Mohit Agnihotri

    Mohit Agnihotri

    Expert C Protocol Developer

    Sweden - Last active: 1 day ago - Tests: 4 - Portfolio: 5

    Few Professional Projects undertaken at various organisation as part of the organisation. LTE Femto EnodeB Solution: Responsibility included detailed development, testing for the given feature. In addition had opportunity to work in collaboration with end user team in Korea and completed the integration activity on MindSpeed Platform. eGTP-C PSF :This is a project which provides fault tolerant capability to trillium eGTP-C layer. Vested with the responsibility, I provided team with Technical Leadership and mentored all team members and made them aware with technical details of the requirement. In addition I was involved in design, prototyping and development of Code and final testing of the project on various platforms. SS7 & Fault Tolerant Support (TAPA SS7 Protocol Portfolio & DFTHA/FTHA) : Currently acting as Team Lead and heading a team of 4 members which are actively supporting entire SS7 protocol portfolio. My responsibility included guiding and analyzing feasibility for all upgraded related requirements. In addition, I am vested with individual responsibility to provide upgrade and maintenance related requirement for TAPA DFTHA/FTHA solution. Signaling Connection Control par( SCCP)t & SCCPX: Worked as Senior Software Engineer on SCCP & SCCPX protocol development for the Huawei MSX, CSX, ASAU as the end Product. My key responsibility includes the maintenance of the existing protocol stack, optimizing the performance with product integration and developing new features as desired by the product to enter new markets. Transaction capability Access(TCAP): While working on TCAP protocol development for the Huawei USAU end Product, my key Responsibility includes the optimization of the protocol and development of the new features as required by the product. Specialties:LTE Architecture, RRC, S1AP, X2AP, eNodeb Application Development SS7[TCAP/SCCP/SCCPX/MTP3] & Sigtran[SCTP/M3UA] protocol Development Ant, Assembly language,C,C++,Python Build Automation using CruiseControl & Other Open Source Tools

    $44.44 /hr
    49 hours
    0.00
  8. Ales Guzik

    Ales Guzik

    Senior Software Engineer

    Belarus - Last active: 1 day ago - Tests: 8

    Full-stack engineer. Over the last 4 years I have participated in development of wide range of web applications using Ruby on Rails, where I have been writing server-side code in Ruby, client-side JavaScript code, doing HTML and HAML markup with CSS, SCSS and LESS styling. I have been setting up staging and production servers from scratch and have written server setup automation using Chef. Passioned about functional and concatenative programming languges, Clojure and Factor in particular. Contributed to various opensource projects, and maintain some personal ones.

    $25.00 /hr
    46 hours
    0.00
  9. Tomasz Posłuszny

    Tomasz Posłuszny

    Software Engineer

    Poland - Last active: 1 day ago - Tests: 3 - Portfolio: 4

    I started working as a Software Engineer right after getting my Bachelor degree in Robotics. I worked at Samsung Electronics mostly as Embedded Software Engineer (Linux, C/C++) while pursuing Master degree. After defending my thesis on image processing on video sequences I decided to work as a freelancer. I enjoy developing software, which is not only programming, but also prototyping, designing architectures and testing alongside with collecting customer's feedback. I contributed to open source OpenCV library and gained experience in following technologies by completing side projects: Java, Android SDK, PHP, HTML5/CSS3/JS, Python, Octave/Matlab, Web Services, REST APIs.

    $27.78 /hr
    34 hours
    0.00