Network & System Administrators

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Rodney Caston

Rodney Caston Agency Contractor

Systems Engineer

United States - Tests: 3

I have over fifteen years experience in linux systems administration and development, having managed large environments composed of many thousands of systems. I believe I bring with me a valuable perspective on how to provide solutions for efficiently managing extremely large, and distributed environments without scaling headcount. Some of my accomplishments include having built site reliability/network operations centers from the ground up, from the development of the fault and performance management systems to the management of the staff. I have built up and administered large scale email infrastructures which would send and receive millions of emails daily. I have managed datacenter migration projects consisting of thousands of servers running live services. I have extensive experience in the online gaming industry, focusing on adminsitration, server engineering, and DevOps. I have even worked in a creative capacity as a writer and creative designer in the past, having co-created the MegaTokyo™ intellectual properties. Given the variety of roles I've had in my career, I consider myself a jack-of-all-trades. What I enjoy most is being able to provide value to the organizations that I am able to support, regardless of what role that places me in at the time. Specialties: Amazon Web Services, Apache, Backtrack 5, Bind/DNS, Cacti, Chef, Cloud, Drupal, Elasticsearch, Ganglia, Glusterfs, HAProxy, Heartbeat, Kibana, LDirectord, Linux (Ubuntu, Debian, Redhat, CentOS, Kali), Logstash, Memcache, Metasploit, Monit, MongoDB, MRTG, Munin, MySQL Server, Nagios, Netcool, Nginx, Offensive Security, OpenVAS, OpenVPN, OSSEC, OSX, Penetration Testing, Postfix, PowerDNS, Puppet, Ruby, RRDTool, SAN, Samba, Sendmail, Shell Scripting, Splunk, Squid, Syslog, SMTP, SNMP, SSL, Squid, TCP/IP, VMWare, Windows, and Xen.

Associated with: Caston Consulting LLC

$91.11 /hr
1,634 hours

Oleksii A.

JavaSE/JavaEE Developer, PhD in Information Security

Ukraine - Tests: 5

Enterprise and Web Application Developer. PhD in Information Security. Especially interested in building complex (transactional, concurrent, secured, scalable etc) Java/J2EE based systems. Strive for creating systems based on sound technical designs by applying OO design concepts and software patterns.

$38.89 /hr
1,277 hours

Ezekiel Baniaga

Ezekiel Baniaga

Ezekiel Baniaga - Software Developer

Philippines - Tests: 4 - Portfolio: 3

With 5 years experience in various areas of Software Development. Concentrated on different open source technologies to provide clients with a low cost but high quality end results. Below are my mastered technologies and platforms: Enterprise: Java, NetBeans Platform, EJB, JPA, JAX-RS, Hibernate, JBoss Application Server, Apache HTTP Server, Tomcat, Jetty Reporting: JasperReports using iReport. Database: PostgreSQL, MySQL, Sybase, JavaDB, HSQL Software bug-tracking and management tools: Subversion, CVS, Trac, Kenai

100% Job Success
$13.33 /hr
4,008 hours

Chalitha Wickramathilaka

Chalitha Wickramathilaka

Senior Backend Programmer / Tech Lead

Sri Lanka - Tests: 2 - Portfolio: 15

From almost 12 years I have been working with php based web applications. MVC, and Zend Framework 1/2 development environments. I have the same experience with java scripts /jQuery/extjs frameworks. I have more than 7 yrs experience on load balancing . Clustering , and replication over debian, centos and redhat systems. I use Oracle and mysql databases on most of my projects. As a code collaboration tool I am using Gforge with svn/git for my projects. also I have strong experience with iptv application such as tvguides, epg, music applications etc etc. I have been working on high loaded websites, application databases for my work. I have strong knowledge of optimizing web applications smooth run on a very high load. Also I have experience with hardware Visualization on VMware boxes. I have additional experience in ETL Jobs / Mysql clustering / Piranha / php heavy load balancing / caching nodes. Android / FB apps/ REDIS/VMware ESX configuration

100% Job Success
$33.33 /hr
5,082 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
1,733 hours

Aniruddh P.

Aniruddh P.

Java Solution Design/Developer

Australia - Tests: 4 - Portfolio: 1

Over the last 12 years I have been working on Java/J2EE, Struts, Swings, Xml Api's and mobile technology related projects. My core competency lies in most of the Java Api's as well as in developing new applications as well as providing expert support for maintaince applications. I am very good at coming in at any stage of the application development and getting on with providing expert assistance. I am seeking oppurtunities to work on Java and web technologies. I have been involved with a variety of projects ranging from taxation/accounting applications to telecom projects to enterprise asset managment applications. Thanks and Regards

$25.00 /hr
3,262 hours

Omar Valadez

Omar Valadez

Software Architect

Mexico - Tests: 5 - Portfolio: 1

13 years of professional experience in the full life cycle of software development projects for financial, insurance, and government companies. Client-server core banking, Insurance systems experience, CRM systems. Software Architect and Project manager in Java and Microsoft Development Tools, including desktop and web apps. I also have some experience in the following areas: - OOP, Web Services. - Microsoft .Net Frameworks ASP .Net,VB .Net, C#, MVC, WCF, WPF. - Java - PHP and MySQL. - Databases Administration in : MySql 5, Microsoft SQL Server 2005, 2008 and SyBase 11, Oracle 11. - Window Server Administrator 2003,2008 VPN, IIS,Active Directory, - Exchange Server. - Linux Server Administrator for services :FTP,DNS, OpenVPN, Samba,Firewall in distributions : Mandriva, OpenSUSE, Fedora. - Automatic testing with Smartbear TestComplete automation software. - jQuery and Prototype Javascript - VPS, shared hosting, DNS configuration, Cloud computing.

$22.22 /hr
6,568 hours

Rami C.

Rami C.

Profesional Linux Admin, Python, C developer

Greece - Tests: 7 - Portfolio: 5

10 years of developing and administering for Linux. I love writing software in python and C. I am a skilled python developer with extensive know-how and i enjoy working with *Django*, *Flask*, *Gevent*, *Celery*, *Paramiko*, *Scrapy*, *Cython* and a lot of other packages i have used over the years. As a systems administrator i am an expert in the web-hosting ecosystem. Apache, Nginx, Bind, Postfix, Dovecot, various Control Panels, Linux Firewalls and a lot more. Also i have experience in corporate LAN packages such as samba, VPN, LDAP, ERP etc. Administering GNU/Linux systems for over 10 years gave me the necessary background to get involved in systems programming. I am a hobbyist Linux kernel hacker, Linux file-systems and Netfilter/iptables tinkerer. An open source enthusiast and an active contributor to the community. Last 3 years i am involved in embedded linux development under a big renewable energy contractor in Greece and we have deployed hundreds of embedded systems with a tailored busybox distribution.

100% Job Success
$35.00 /hr
1,453 hours

Marek Malevic

Marek Malevic

Software Architect (Java, SQL)

Czech Republic - Tests: 11 - Portfolio: 1

IT specialist experienced in software analysis and implementation of performance improvements, databases development, implementation of information & reporting systems. Developer of server, desktop and web applications, experienced in both Linux and Windows server environments. Worked for 7 years as Senior Technical Consultant for an international company (Infor) and participated in many international projects. Since 2012 a Bottleneck Team Lead in an international team responsible for software analysis and implementation of performance improvements on various platforms (mostly C/C++, Java & DBs). Since 2013 a member of a team that develops Amazon Elastic Compute Cloud (EC2) management web service used by a company with 5000+ employers, Amazon WebServices (Java API) expert.

100% Job Success
$40.00 /hr
7,425 hours