Operating Systems Development Freelancers

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Operating Systems Development Job Cost Overview

Typical total cost of Upwork Operating Systems Development projects based on completed and fixed-price jobs.

Upwork Operating Systems Development Jobs Completed Quarterly

On average, 5 Operating Systems Development projects are completed every quarter on Upwork.

5

Time to Complete Upwork Operating Systems Development Jobs

Time needed to complete a Operating Systems Development project on Upwork.

Average Operating Systems Development Freelancer Feedback Score

Operating Systems Development Upwork freelancers typically receive a client rating of 4.62.

4.62
Last updated: July 1, 2015

Popular Operating Systems Development Searches

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  1. Daniel Z.

    Daniel Z.

    Highly skilled API integrator, PHP (ZF) Coder and Project Manager

    Poland - Last active: 1 day ago - Tests: 7 - Portfolio: 6

    Goal: Project and develop high quality apps for your success. Profile: OOPHP & Zend coding, IT consulting and business analyst, project coordinator and manager, Other skills: Apache, Bind, SSH, bashscripting, Memcached, Github, Solaris, Oracle, MySQL, Radius, AD, expert knowlegde of many *ux and windows systems Advantage: Project and implementation of many web apps. Most of it projected and developed by myself using Zend Framework, Google API (youtube, gdata), social API (twitter, facebook). Some of it integrated with operating systems or AAA software (radius, ldap). Usually Design Patterns were used (like Template Method, Version of Control, DAO, Dependency Injection, Decorator and so on). Some application built upon a structure of web services (XML, REST, JSON), some using jQuery and AJAX. Tools and technologies: Apache, radius, bind, ldap, Zend Framework, XML, SOAP, Linux, Linux daemons, Memcached, Sockets, REST, JSON, Oracle, MSSQL, MySQL, Design patterns, MVC, SVN, BASH, PHPUnit, Xdebug, Unit testing, Google Youtube API, Google Gdata API, Google Maps API, Facebook API, PayU API

    $35.00 /hr
    1,673 hours
    4.98
  2. Oscar Bass

    Oscar Bass Agency Contractor

    Senior UNIX System Engineer, LAMP, LEMP, Network Security, Cloud.

    United States - Last active: 3 days ago - Tests: 7 - Portfolio: 1

    Expert UNIX system administrator and network engineer. Got a problem? I can solve it! For more than 15 years I have been the I.T. backbone and support for many online companies. I use the most up to date standards for any project I am involved in. I work extremely quick and efficiently. If you have a problem let me help you solve it. OS: Linux - Expert, FreeBSD - Expert, AIX - Expert, HP-UX - Expert, Macintosh OS/X - Expert, Windows Server - Proficient Cloud services: AWS, Rackspace, OpSource, Linode Web servers: Apache, Nginx, Tomcat Database servers: Mysql, Postgresql Monitoring: Nagios, Monit, Munin, Cacti Scripting: bash, perl, shell Virtualization: OpenVZ, Xen, SolusVM Mail servers: Postfix, Exim, Sendmail, Dovecot Control panels: cPanel, Plesk, Direct Admin, Webmin/Virtualmin, ISPconfig, OpenPanel Other: standard network services (DNS, DHCP, LDAP, Samba, SVN/Git, http proxy, jabber, backups, monitoring etc), firewalls (iptables, ipfw, pf)

    Associated with: Bass Designs Agency

    $44.44 /hr
    288 hours
    4.96
  3. Asif Gohar

    Asif Gohar

    System, Network, Active Directory, Exchange, Backupexec, System Center

    Bahrain - Last active: 3 days ago - Tests: 5 - Portfolio: 5

    Knowledgeable and skilled IT professional with encompassing work experience spanning more than 8 years in systems administration with compliance as per industry standards. Possess excellent interpersonal skills to liaise amicably with diverse groups of people, different departments, vendors and agencies. With extensive exposure to different cultures and work environments and has worked effectively with multinational individuals and professionals from all organizational levels. Certifications: MCITP (Server 2008, Exchange 2010, Lync 2010) Expertise: Exchange 2007/2010, Active Directory 2003/2008, SCCM, SCOM, DPM, SCVMM, BackupExec,Enterprise Vault, WSUS, Lync, Server 2003/2008, ADRMS, SQL Server, SAN/NAS.

    Groups: Microsoft Certified Professionals

    $20.00 /hr
    270 hours
    4.95
  4. Antonio jose S.

    Antonio jose S.

    Senior IT Consultant

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

    - Expert in information security management systems: Implementation of an information-security management system according to Norm UNE ISOIEC 27001, definition of security objectives, indicators, political security, code of best practice, risk management, treatment plan, control access definition, communications and operations, legal compliance, management policies incidents of security, CPD preparation, elaboration of contingency plans, business continuity plans, plans elaboration testing of the continuity plan, design of the applicability statement, product realization, actions preventive corrective action, internal audits, training delivery. - Expert in management of the information technology services systems: Introduction of a management system of information technologies services according to standard ISO 20000, elaboration of service processes delivery (capacity, continuity and availability, service levels, reports of service, security, TI budget), control process (configuration, change), delivery processes, solving incidents (problems) processes, business relationships process (suppliers) relations, internal audits, training. -Software process improvement: Implementation of ISO 15504/12207 (SPICE), internal audits, training. -Technological expert: design and implementation of networks architecture, information systems, backup policies, business continuity plans, servers administration (Linux, Unix, Windows, Mac Os), databases (Oracle, MySQL, Posgree), SharePoint, web servers (Apache, IIS), servers (Tomcat, JBoss, WebSphere) applications, ethical hacking (nmap, telnet, Shell script, ssh), vulnerabilities analysis and treatment (Nikto, Nessus, Acunetix, Grendel Scan).

    $33.33 /hr
    269 hours
    5.00
  5. Jovelyn O.

    Jovelyn O. Agency Contractor

    Experienced Virtual Assistant

    Philippines - Last active: 6 hours ago - Tests: 7 - Portfolio: 3

    A trained and experienced professional working at home for more than 5 years now and the aim to help business companies around the globe achieves success by providing excellent quality services specially in the areas below: • Virtual/Personal Assistant • Order Processing/Order Fulfillment • Web Research, Data Entry • Clerical Job • Inbound Customer Service, Technical/Email/Chat Support • Quality Assurance • B2B and B2C-Lead Generation, Data Cleansing/Verification, Appointment Settings • Bookkeeping • Wordpress/Social Media and Internet Marketing

    Associated with: 3J OUTSOURCING SOLUTION

    $8.89 /hr
    5,872 hours
    4.98
  6. Andrei Volkov

    Andrei Volkov Agency Contractor

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

    Belarus - Last active: 2 days ago - Tests: 5 - Portfolio: 13

    I have over 15 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. 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. =============== 2. 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. =============== etc etc Sunday - day of rest. Or in emergency case - payment with double rate. best regards, Andrei odesk.by / upwork.link PS: With love from USSR. ;-)

    Associated with: UPWORK.LINK

    $15.00 /hr
    952 hours
    4.98
  7. Bejay Alvinez

    Bejay Alvinez Agency Contractor

    Ebay Guru / Amazon Specialist / Exec. Asst. / QA Manager / Typist

    Philippines - Last active: 1 day ago - Tests: 6 - Portfolio: 11

    I have been an independent contractor on oDesk for the last 4 years. During that time I have had the opportunity to work on a variety of projects, both short and long term. Some of my oDesk work experience includes Ebay and Amazon Management, Website Product Upload, Data Entry & Research, Record Keeping, Administrative Support, Ad Posting and Marketing Analysis, Sales, Real Estate and Shipping & Receiving. Before I started my career on oDesk I had previous experience as a Supervisor and Manager for an Outsourcing Data and Call Center companies, Financial Analyst, Quality Control, Data Management, and various areas of Documentation and Administration. Computer and internet savvy, fluent in English (written & verbal), able to meet deadlines, detail oriented and I'll admit I am a bit of a perfectionist. My goal is to provide buyers with accurate, timely and complete work at rates that are both reasonable and affordable. Seeking a career of the above mentioned expertise and chosen fields wherein I can give the best of my knowledge and skills for the company's profit and growth. To highlight my qualifications, I already have 48 JOBS at ALL TIME with ALL PERFECT 5.00 feedback score and a total of 6,829 hours. This will serve as a proof of being one of the top and high caliber Odesk Providers and assurance to my excellent work ethics, drive, initiative, reliability, high standard of professionalism and positive attitude towards work.

    Associated with: Joven Sangre GSolutions Agency, Mondex Professionals Agency

    $6.50 /hr
    10,214 hours
    5.00
  8. Lou Mark Cruz

    Lou Mark Cruz Agency Contractor

    Transcriptionist | Excellent Typist-Peak speed of 120 words per minute

    Philippines - Last active: 13 days ago - Tests: 15 - Portfolio: 3

    I am a tenured and experienced online service provider. I mainly do: Typing and Encoding - With an excellent peak typing speed of 120 words per minute with 100% accuracy, your typing project can be finished flawlessly in just a flash. Linkbuilding - Establishing links for different quality websites that boost clients' ranking via Google. Transcription - (requires speed, high accuracy, fluency in the English language, strong punctuation and sentence structure knowledge, ability to closely follow instructions, and strong internet research skills). As mentioned above, my above average typing speed made me able to deliver an accomplished transcript (transcribed and proofread) real quick and accurate. Research - digging information from the web, and providing relevant data for a simple to advanced and complex task. Data Entry - usually copying and typing data from one source to another office application such as Word, Excel, or directly to a website.requires speed, ability to keenly give attention to details, strong analytical and strong internet research skills. I also do Ad Posting, PDF to MS-Word/MS-Excel conversion, Wordpress and video editing. For nearly a decade now, I have been working as a freelance Computer Technician; and my deep computer knowledge both software and hardware, and my strong analytical skills made me feel really confident working at-home independently, providing complex-type services with a satisfying end-result. I am also a Microsoft Office Expert (Word, Excel, PowerPoint)I can work with minimal or no supervision at all, yet able to deliver a quality service reaching and exceeding client expectations - which is actually my GOAL...

    Associated with: QUALIteam, LMC-NPC

    $11.11 /hr
    2,220 hours
    5.00
  9. Marwan D.

    Marwan D.

    Mr

    Jordan - Last active: 3 months ago - Tests: 7 - Portfolio: 2

    Excel is my passion, my analytical personality along with a systematic way of thinking that was gained through years of study and work experience at managerial positions allows me to innovate when it comes to analysis, problem solving, creative thinking and finding solutions. My natural love of number adds to my passion to excel leading to extraordinary results, logical reasoning is one extra treat that adds power to the solutions I create. I have created several solutions harvesting the power of excel at all stage of my carrier progress that lead to increased sales, more profits and decreased expenses. I am on a continuous learning curve that I create for myself, learning new competencies on an ongoing basis, I learned Macros and Pivot tables online by myself and the learning curve is ongoing for me.

    $20.00 /hr
    70 hours
    4.97