Cryptography Freelancers

Showing 29 freelancers

Cryptography Freelancers

Showing 29 freelancers

  • Linux Admin and Devel (Security/Backup/C/Bash/Perl/Python/etc)

    I have over 14 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 … more

    I have over 14 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, 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. As 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 + Windows 2003/2008. 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. TIPS WITHOUT PAYMENT: =============== 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 - problem in 'indian' plugin ))) - 15% cases - problem in 'indian' theme ))) - 5% 0day of WP also you need disable all shell function in php and enable suphp. =============== Good Luck on odesk.by  less

    unix-system-administration unix-shell redhat-administration linux-system-administration bash nginx lamp-administration centos email-technical-support opensuse cryptography operating-systems-development perl apache-administration firewalls c administrative-support translation russian raid-administration redmine perl-catalyst 00 more less
    • $14.00 HOURLY RATE
    • 5.0
    • 384 HOURS
    • BELARUS
    • LAST ACTIVE
    • 4 PORTFOLIO ITEMS
    • 5 TESTS
    ASSOCIATED WITH:
  • Web Development & Algorithm Design

    Over the last 3 years, I've been developing web applications, mostly using HTML5-related technologies. I'm pretty experienced with jQuery and HTML canvas, have some expertise in WebSockets. I'm good with object-oriented and functional programming, my language of … more

    Over the last 3 years, I've been developing web applications, mostly using HTML5-related technologies. I'm pretty experienced with jQuery and HTML canvas, have some expertise in WebSockets. I'm good with object-oriented and functional programming, my language of choice is Python. I also have experience in cryptography and developing efficient algorithms. One of the proofs of my expertise in algorithms is a Bronze medal from the International Olympiad in Informatics 2012. When required, I may also set up Linux servers. My distro of choice is Arch Linux, though I have some hands-on experience with Debain too.  less

    python algorithms javascript html5 html cryptography linux-system-administration 00 more less
    • $11.11 HOURLY RATE
    • 4.6
    • 0 HOURS
    • LATVIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 4 TESTS
  • Architect, Backend Engineer (Scala, Java, Hadoop)

    Over the past 15 years I've worked with projects ranging from Startups to Fortune 100s. From C++ to Scala, past assignments involved: - Protocol Design in C++/Delphi - Java API Publishing - Maven Plugin Development - Distributed Systems using RESTful backends - Scala … more

    Over the past 15 years I've worked with projects ranging from Startups to Fortune 100s. From C++ to Scala, past assignments involved: - Protocol Design in C++/Delphi - Java API Publishing - Maven Plugin Development - Distributed Systems using RESTful backends - Scala / Akka Design - Jenkins Plugins Writing On a daily basis, I spend between Systems Architecture, Build Planning, for Hadoop and Restful Backends, specially under Amazon Web Services. Oh, I'm also a Cloudera Certified Administrator and Developer. Favorite platforms include Scala, Python and General Java. See my full profile for more descriptions and feel free to browse my github and bitbucket profiles at the addresses below: http://github.com/ingenieux http://bitbucket.org/aldrinleal Favourite customers involve pragmatic teams, with contant online presence, and direct involvement with the end customer, and a problem involving legacy and the next generation Feel free to discuss our next project - I'm always looking for the next challenge!  less

    hadoop java amazon-web-services spring-framework apache-maven jpa rest hibernate amazon-ec2 amazon-s3 amazon-rds apache-camel apache-hive puppet-administration xml-web-services junit cryptography xml-rpc twitter-api api-development api-documentation nosql test-driven-development j2ee j2se oauth java-servlets-development agile-software-development automated-testing database-testing load-testing apache-thrift mercurial multithreaded-programming software-debugging reverse-engineering data-science rss xml etl crawlers google-app-engine google-apps google-app-engine-api google-apps-api 00 more less
    • $55.56 HOURLY RATE
    • 4.8
    • 2558 HOURS
    • BRAZIL
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 12 TESTS
    GROUPS:
  • Software Engineer / Java / PHP / Cloud / NoSQL / Cryptography

    I'm a software engineer based in Sydney I'm always after the simplest solution that deliver value to the business Areas of expertise - Web development (Java & Php) - Cloud computing (paas and saas) Google/AWS - API development - Security and Network … more

    I'm a software engineer based in Sydney I'm always after the simplest solution that deliver value to the business Areas of expertise - Web development (Java & Php) - Cloud computing (paas and saas) Google/AWS - API development - Security and Network Security - Mobile applications development (Android) with scalable Cloud Backends - NoSQL solutions - Mentoring and team management - Binary protocols (Hessian / Apache Thrift) Skills Programming languages: Php / Java Core / JEE / Android /Struts / Guice / Spring / Spring MVC, Hibernate / Google Application Engine / C/C++ Databases: MySql / MongoDB / Google Bigtable / Bigdata / CouchDB Interests: Cryptography / Secure API development Platforms: Windows / Linux (Ubuntu) / Linux ARM  less

    php mysql cryptography j2ee go-programming-language android-app-development java mongodb 00 more less
    • $55.56 HOURLY RATE
    • 4.9
    • 1337 HOURS
    • AUSTRALIA
    • LAST ACTIVE
    • 8 PORTFOLIO ITEMS
    • 6 TESTS
  • Delphi developer

    I believe that freelancing is the best way to gather experience and improve one's skills, while giving the most flexibility to both workers and employers. I have developed in Delphi (versions 5,6,7 to XE4), C++, PHP, SQL … more

    I believe that freelancing is the best way to gather experience and improve one's skills, while giving the most flexibility to both workers and employers. I have developed in Delphi (versions 5,6,7 to XE4), C++, PHP, SQL and others. Over 4 years, I was responsible for managing computer and paper based examinations at the British Council in Bulgaria and writing software for the above. This has taught me the importance of keeping to schedules and deadlines, team-working and communication. As a Computer Science graduate, I have very good knowledge of computer systems, OS, networking concepts, information security, etc. I also have some experience with GPS, Garmin products, Google Earth/Maps and cartography.  less

    delphi sql firebird mysql sqlite data-structures windows-app-development win32-app-development mac-os-app-development dropbox-api cryptography software-testing database-programming security microsoft-excel cartography amazon-web-services 00 more less
    • $44.44 HOURLY RATE
    • 5.0
    • 1203 HOURS
    • BULGARIA
    • LAST ACTIVE
    • 4 PORTFOLIO ITEMS
    • 11 TESTS
  • Cybernetic and Computational System Engineering

    For the past five years, I have been learning about the information security world, working as an CEH (Certified Ethical Hacker). With some of my co-workers, i have participated in a lot of projects, strictly focused on Information Security. Also … more

    For the past five years, I have been learning about the information security world, working as an CEH (Certified Ethical Hacker). With some of my co-workers, i have participated in a lot of projects, strictly focused on Information Security. Also, as we evolve and grow in this area, we have trained ourselves in Forensics Sciences, attending clients who need to know what happened after a contingency. I consider myself a self-taught person that likes to grow and that is not afraid of challenges or difficult cases. At this moment my priority is to teach and so much to share the little knowledge I have gained over the years, as well as learn from those who have traveled a different path and with this keep on growing.  less

    penetration-testing network-security network-administration linux-system-administration cisco-routers mysql mac-os-app-development cryptography 00 more less
    • $30.00 HOURLY RATE
    • 5.0
    • 0 HOURS
    • MEXICO
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 3 TESTS
  • Software engineer (C/C++, obj-c, Python, Matlab, R, ML algorithms)

    The last 5 years I have worked mostly as a C and C++ developer in a field of process automation and control (SCADA). Familiar with OOP and TDD, Design Patterns and different methods of software development (waterfall, agile). I have … more

    The last 5 years I have worked mostly as a C and C++ developer in a field of process automation and control (SCADA). Familiar with OOP and TDD, Design Patterns and different methods of software development (waterfall, agile). I have a good experience in the development of multithread client-server applications, windows services, dll-s and cross-platform libraries. One of the specific features of my job was writing readable and easy-portable C-code covered with tests.Another interesting feature is working in small groups dealing with frequently changing goals. The major benefit of this style of work is a great experience on all levels of software development process (from project design and requirement development to final tests). Besides, I have a great interest in the research of new technologies and IT science related fields.  less

    c c++ microsoft-visual-c++ multithreaded-programming windows-app-development windev winsock stl test-driven-development oop tcp-ip python xml ssl cryptography tortoise-svn git jenkins mantis dcom objective-c cocoa sqlite 00 more less
    • $25.00 HOURLY RATE
    • 5.0
    • 549 HOURS
    • BELARUS
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 7 TESTS
  • Lucene/Cassandra/Clusters Expert, IT Architect - 15 years

    I am seeking opportunities to build comprehensive software with distributed data processing, indexing, searching and encryption (JCE, RSA, AES, X.509). Over the last 10 years, I am also working as system architect on TrackStudio issue tracking system: http://www … more

    I am seeking opportunities to build comprehensive software with distributed data processing, indexing, searching and encryption (JCE, RSA, AES, X.509). Over the last 10 years, I am also working as system architect on TrackStudio issue tracking system: http://www.TrackStudio.com I am interested in working with Apache Lucene, Cassandra, Hadoop/HBase, Amazon EC2, Java. I have worked with almost all available RDBMSes, many NoSQL engines (Hadoop/HBase, Cassandra, OrientDB, Neo4j, MongoDB), in-memory databases (Hazelcast, GridGain), clustered file systems and other similar stuff. Have a great experience in query optimization, application profiling and troubleshooting. Strong theoretical background in math, relational database theory, statistics and IT; broad software development industry's experience including but not limited to programming, object-oriented and database design, development for Windows/UNIX/Linux. I have good project management skills, experience in communication local and worldwide customers. Have no daytime job and focused on oDesk projects.  less

    lucene-search cassandra distributed-computing clustering multithreaded-programming amazon-ec2 database-programming cryptography project-management hadoop hbase java html sql c++ amazon-web-services amazon-s3 oracle-database ibm-db2 firebird postgresql mongodb data-analysis apache-solr apache-ant apache-maven apache-struts gwt apache-tomcat git github subversion linux-system-administration solaris-administration apache-thrift mysql hibernate rest soap 00 more less
    • $33.33 HOURLY RATE
    • 4.9
    • 8152 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 7 TESTS
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