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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: 8 hours 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. Panayotis Tsiamis

    Panayotis Tsiamis

    Senior Systems and Software Engineer

    Greece - Last active: 1 day 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
    287 hours
    0.00
  3. Juan Vercellone

    Juan Vercellone

    Computer Engineer

    Argentina - Last active: 22 days ago - Tests: 6

    I'm a Computer Engineer with a strong background in: - Parallel computing (distributed, multi-core and GPGPU) - Automation through scripting (e.g. Perl, Python, BASH, etc.) - Low level development (at the OS level, and assembly) I am keen on optimization and high performance computing. I am also attracted to new challenges and problems that defy my knowledge. I am very responsible and quality oriented. I love to feel proud of my work.

    $27.78 /hr
    80 hours
    0.00
  4. 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
    44 hours
    0.00
  5. Bradley Hesse

    Bradley Hesse

    iOS Developer

    United States - Last active: 8 hours ago - Tests: 2 - Portfolio: 2

    I am an iOS developer interested in creating new and exciting applications for the App Store. I have several years of experience starting, building, and maintaining complex iOS and OS X applications. My knowledge includes C, C++, Objective-C, and I have a lot of experience in graphic design as well to make your app look sharp!

    $20.00 /hr
    59 hours
    0.00
  6. Dmitry S.

    Dmitry S.

    Control system design engineer

    South Korea - Last active: 8 hours ago - Tests: 2

    Master degree (Bauman university) in automatic control with major in Spacecraft Control. Strong knowledge of control systems design and development, system modeling, and hardware/software co-design and verification. Over ten years of the servo control development experience in Aerospace and HDD industry (MOKB "MARS", Samsung electronics, Seagate). Responsible for the key parts in the firmware of several innovative and award-winning consumer electronics products. Control system design, digital signal processing, analog/digital filter design, adaptive control and filtering, modern control technologies: fuzzy, neural, Hinfinity, model-predictive etc. Software development from low-level assembly (Teaklite, ARM) to C#.

    $38.89 /hr
    349 hours
    0.00
  7. Gregory Lemercier

    Gregory Lemercier

    Experienced Embedded Software Developer

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

    I have 8 years experience in developing BSP and drivers for various embedded operating systems such as Linux, Android, and Windows Embedded Compact. I am familiar with various hardware platforms, mostly ARM based, such as processors from Freescale, Texas Instruments, NXP, Altera, Xilinx, and others... I have a deep knowledge of the Linux kernel internals, and give Linux kernel trainings to embedded professionals on a regular basis. I also have a great knowledge of C/assembly low-level programming for µControllers running bare-metal. I have years long experience with controllers and buses such as I2C, SPI, UART, USB, PCIe, SDHC, etc... Most of all, I am passionate about everything embedded from small headless memory-constrained devices to high-end graphical tablet-like devices.

    $50.00 /hr
    30 hours
    0.00
  8. David Lundquist

    Software engineer

    Sweden - Last active: 06/06/2013

    Summary Ever since I can remember technology has been an important part of my life, this has taken me from founding my own small technology company back in Sweden to working on projects all over the world. This same focus on technology also allows me to have a broad understanding of how technology is evolving and it has given me the ability to widen my knowledge which is now spread across several different kinds of technological areas. References will be provided upon request. Specialities I am an experienced developer within the mobile sphere having built both back office software as well as fully fledged content delivery and billing solutions for some of the biggest carriers in the world. Ive had several titles in top lists in the apple appstore and on carriers across the world. While mobile has been my main focus the last couple of years my base lies in web where I have developed solutions to allow companies of all sizes to have a presence on the web. I’ve built systems and websites for everything from small local companies to big global companies. For the last couple of years my focus on web has been towards Ruby on rails using a BDD philosophy having finished both big and small sized projects by successfully leveraging cucumber acceptance tests and story writing as well as unit tests based around rspec. While being a partner in different businesses I have also gathered skills in business planning and management.

    $66.67 /hr
    22 hours
    0.00
  9. Austin R.

    Austin R.

    Experienced GNU/Linux System Administrator and Programmer

    United States - Last active: 1 month ago - Tests: 2

    Developer and Administrator with over 7 years of experience with various technologies including GNU/Linux personal computers and servers, Atmel AVR platforms, Git, KiCAD EDA, and the Go, Java, and C programming languages. My experience includes the hardware and software design of a full home automation system. I am prepared to perform many tasks, including setup and administration of servers, programming in C, Java, or Go, PCB design, and project management.

    $22.22 /hr
    1 hours
    0.00
  10. Wilson P.

    Wilson P. Agency Contractor

    C/C++/OpenGL/Network Programmer

    India - Last active: 1 day ago - Tests: 3 - Portfolio: 5

    I am a C/C++ programmer with fair experience in Java and HTML/CSS/Javascript. I specialize in algorithm intensive game physics and ai, desktop applications using wxWidgets, machine learning and C++ based web development targetted for ASPs. Over past 2 years I have 1) Developed from scratch the physics and character maker for a 2D massively multiplayer game. 2) Developed Opensource web application framework in C++ which implements the fastcgi protocol and is designed to solve the c10k problem. 3) GUI for several desktop trading applications using wxWidgets.

    Associated with: Kefas Softwares

    $22.22 /hr
    2,374 hours
    0.00