Browse C job posts for project examples or post your job on Upwork for free!

C Job Cost Overview

Typical total cost of Upwork C projects based on completed and fixed-price jobs.

Upwork C Jobs Completed Quarterly

On average, 120 C projects are completed every quarter on Upwork.


Time to Complete Upwork C Jobs

Time needed to complete a C project on Upwork.

Average C Freelancer Feedback Score

C Upwork freelancers typically receive a client rating of 4.76.

Last updated: October 1, 2015
Clear all filters

Wilson P.

Wilson P. Agency Contractor

C/C++/OpenGL/Network Programmer

India - 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
2,755 hours

Petr B.

Petr B.

Senior Developer, Consultant

Russia - Tests: 5 - Portfolio: 2

I have strong background in UNIX/Linux software development, Master's Degree in Computer Science. I worked on Enterprise high-load distributed hosting automation systems as a Team Leader (3.5 years in SWsoft, Inc., now called Parallels). For the last 6 years I'm running my own small software development business in Russia with primary focus on Python/Django apps. Not pure Web but often involving integration with hardware (Proximity Cards, Sensor Screens) or external systems like Payment Processing, SMS Gateways, GABRIEL (Airline Reservation System), etc. I can take an idea and turn it into a working business, through all the intermediate stages. Also I have experience of investing my own funds in my projects, so I feel the difference between "perfect code" in a month and "good enough" code that increases the revenue right now. Nevertheless, my code is very good: no copy-paste, always written with performance, flexibility and security in mind, etc. On oDesk I'm looking for (and actually find :) interesting projects with a sight on long-term fruitful cooperation. I'm also open to smaller activities (e.g., consulting) where my knowledge can be helpful.

Groups: Coding Champs

100% Job Success
$40.00 /hr
1,740 hours

Pawel Sztur

Pawel Sztur

Python and C Software Engineer

Poland - Tests: 2

When working as embedded software developer, low level programming made me undestand behind the scenes of it all. Now focusing on developing operating systems and python as a tool to speed up and make everyday job simplier and more reliable.

$30.00 /hr
1,292 hours

Ilya Kulakov Agency Contractor

C++/Obj-C, iOS/Mac OS X, Cappuccino, Python, CUDA/OpenCL developer

Russia - Tests: 2

I can: - Develop browser plugins using Netscape API (NPAPI) - Develop browser plugins for Safari and Chrome using native API - Develop web front-ends using Cappuccino - Develop iOS and OSX apps in ObjC using native API and frameworks - Develop launchd/inetd-compaitable agents and daemons - Develop SIMBL-like plugins for Mac OS X - GPU and heterogeneous computing using OpenCL - Write apps/scripts using VMware VIX API - Adopt you cross-platform application for distribution on Mac OS X and Mac App Store. - Develop network applications using ZeroMQ I'm ready to dive into and learn new technologies. My repo on GitHub:

Groups: Application Developers Alliance

Associated with: GreatFruit Agency

100% Job Success
$44.44 /hr
2,038 hours

Andrei Volkov

Andrei Volkov Agency Contractor

Linux specialist (Sec/Opt/Dev, C/Perl/Python/PHP/BASH)

Belarus - Tests: 5 - Portfolio: 13

Important: ------------------- Enhanced shield of your Web application with mod_security! Should be always. It is task #1 after installation ANY web application! ------------------- About Me and more: ------------------- I have over 16 years of work experience with Linux systems. This is the list of software and technologies with which I deal. This list is not full and expands day by day. I always can find right decisions if I found some problems. And I am always interested in looking for mostly economical and productive solutions. Of course, Cpanel, WHM, Webmin, Plesk .... I know how are working these web-wrappers and I support their. I can will tune and to make the checking of these wrappers. But that more important !! I can work without this))) Directly use configuration files of services and etc etc. Usually, it is better way on dedicated servers. ) TCP, IPv4 , IPv6, IPX ... - WiFi, WEP, WPA, WPA2 ... - SElinux, Apparmor, Smack, Tomoyo ... - LAMP ( Apache, Nginx, PHP, Perl, Mysql, Mongo), REDMINE ... - Cpanel, Zpanel, ISP ... - MySQL clustering and replication DNS servers ... - SENDMAIL, EXIM, POSTFIX (POSTFIXADMIN,MYSQL,DOVECOT,POLICYD) ... - HPC system: Torque, Maui, Moab for HPC clusters, Infiniband, FC interconnect, iSCSI, SCST, DRBD, OFED, OPENMPI ... - OpenLDAP ... - VPN with OpenVPN, PPTP, StrongVPN ... - Nagios, Zabbix, Ganglia, OSSEC ... - SVN, CVS, GIT ... - KVM, Xen, OpenStack, Proxmox ... - NBD, RAID, LVM ... etc etc During these years I have been in a large number of tasks related to administration of network devices, as well as with simple and complex server systems. I manage servers for the HPC tasks and for network infrastructure of Internet and Intranet - DNS,DHCP,*FTP,HTTP(S),MAIL etc etc. The main goals - the monitoring of the performance and the security. I also implement tasks of data backup and troubleshooting, support for the users. I have comprehensive work skills with systems based on Debian, Redhat, CentOS, SLES, OpenSuse. I've got more than 8 years of experience in developing the different software with use of C, Perl, Python, Bash, HTML on system and user levels. For example, very important skill in developing and the modification of RPM packages (rpmbuild, rebuild, kernels), custom kernels and etc etc. ------------------- Often: ------------------- How the standart service for VPS's and VDS's projects and dedicated servers: IDS, IPS, the control of contents of log's files, the control of load of the cpu, the memory, the hard disks; the backups of the databases and the files; install or update software, consultations. Emergency call via sms to cell phone. ------------------- STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. VERY OFFTEN: IF YOURS WP WAS HACKED 1. disable plugins 2. execute # diff -r dir1 dir2 3. repeat for plugins if you have last version of WP code: ~ 80% cases - problems: plugin low quality (look on author: from where and who is) ~ 15% cases - problems: theme low quality (look on author: from where and who is) ~ 5% 0day of WP also you need disable all shell function in php and enable suphp/suexec modes. STOP Windows and U/K/buntu etc. TIPS WITHOUT PAYMENT: ------------------- 1. I am getting a lot questions about reliability and quality distributives/clones Ubuntu. Results on practice - Ubuntu clones - worst for server. It is truth. If you $buntu guy, I can't help you right now. I only can recommend Debian way for server. =============== 3. Nginx of course is good program. For small/middle vps. But in serious projects - apache. Nginx will be suitable for frontend. It is only practice. Always for all web application should be mod_security module. Firewall of level of web application on 7 level of OSI. Each web application/site should be under own user in environment of vps or on dedicated servers. =============== 4. By topic Wordpress. For optimisation services of OS , namely system IO(type of disks or partitions) and DB(type of engines of tables), need to use empty installation (default variants). Most problems of work WP contains in itself - customized plugins or themes. For analyze pages need begin with such services as =============== Sunday - day of rest. Or in emergency case - payment with double rate. best regards, Andrei / PS: With love from USSR. ;-)

Associated with: UPWORK.LINK

100% Job Success
$16.00 /hr
1,023 hours

prachya boonmak

prachya boonmak

Delphi,C++,GIS,TCP/IP,Winsock,ASP.NET [where Quality Comes First]

Thailand - Tests: 2

I have over 20 years of experience in desktop software development. The applications I developed such as Parental Control, SSH/VPN client and other TCP/IP or networking related softwares. I also have experience in database application development such as Accounting, Inventory Control, Calendar/Scheduling Management etc. I developed all those softwares using Delphi, C++,C# as the major languages depending on the nature and constraint of applications. With my long time experience, I've learnt not just how to write good quality of code, yet how to make a good software product as full software development life cycle (SDLC). I decided to start freelancing because I love to make software, not just to be a management in a firm.

88% Job Success
$17.78 /hr
1,185 hours

Andrew Ageev

Andrew Ageev

C++ developer

Russia - Tests: 3 - Portfolio: 1

I am for a long in software development. It is no wander that I have experience in many software specializations. I develop for Windows, Linux, Mac OS. I have been working in physics research. I have been working in industrial automation and have an experience of making embedded system and developing for ARM controllers. I have been working in business automation and have experience with all popular databases. I have experience in computer vision and I even have experience in game development. I prefer native code development. I like cross-platform or multi-platform development. I like not standard and challenging tasks. If you have a project and not any developer is capable to handle it - your are probably looking for me.

100% Job Success
$22.22 /hr
1,498 hours