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On average, 7 Cryptography projects are completed every quarter on Upwork.


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Cryptography Upwork freelancers typically receive a client rating of 4.85.

Last updated: October 1, 2015

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Stefano Fratini

Stefano Fratini

Software Engineer / Java / PHP / Cloud / NoSQL / Cryptography

Australia - Tests: 6 - Portfolio: 8

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

$55.56 /hr
1,288 hours

Charandeep Singh

Charandeep Singh

MCPD, .Net, Java , MVC, Azure, Jquery, Web APIs, Mobile, Development

India - Tests: 1

Myself Deep Kamboj, having more than 14 years of experience in developing full stack applications including Web, Desktop, Web and Windows Services . I have been doing programming in C++, C ,C# , Visual Basic, and Java. I have worked on ASP.NET, MVC, Entity Framework, JQuery and have work on lots of medium to high end users projects. I have worked on different relation database, SQL SERVER and DB2, I am also Microsoft Certified Technology Specialist [MCTS], Sun Certified Java Programmer [SCJP] and Microsoft Certified System Engineer [MCSE].

36% Job Success
$12.50 /hr
224 hours

Alexander Kudinov

Alexander Kudinov Agency Contractor

Expert C/C++, QT, DSP, Multimedia, Web (Windows, Linux, Mac)

Russia - Tests: 5 - Portfolio: 21

I am a Full Stack Developer with over 15 years of experience in commercial development for Windows, Mac and Linux. All my projects have strong emphasis on the Quality Management. I've worked with teams up to 100 developers and I've managed team of 12 developers myself. I'm able to deliver software from start to finish. With my skills and experience, I always strive to produce clean, robust and highly tested code for every project. I am a proponent of best practices and design patterns and have a gift for refactoring and optimization. I guarantee solutions that you won't need to fix after the project is finished, lots of ideas regarding your project, security audit, etc My strong points are: - Full-stack software development - Deliver on time (!) - Strict control of code quality. - Instant communication and Daily reports Primary domains: - Multimedia, audio/video processing - Desktop applications, User Interfaces - Network and Server-side services - Cross platform development (Windows, Mac, Linux) - SQL and No-SQL databases - Performance optimisation As a technology enthusiast I enjoy utilizing cutting-edge tools to deliver projects quickly and efficiently. I love concentrating on the end result and final polish - that's what user will see and interact with. Proven expertise in the following technologies/platforms/skills: - Desktop development: C++ (Qt, STL, Boost, COM, ATL, MFC etc), Objective-C - Multimedia development: new audio/video effects, compress/decompress streams, convert between different formats, authoring software, - Develop plug-ins for 3rd party software - System development: low level features, kernel drivers, make a dll-hooks - Web Development: AJAX, PHP, JavaScript, AngularJS, HTML5, CSS3 - Integration with third-party web services and payment gateways. - Database: MySQL, MongoDB, Redis. - Cryptography: OpenSSL (RSA, DES, AES, MD5, SHA1/2, SSL protocol, etc) - Operating systems: Windows, Mac OS, Linux (all versions) - Version control software: Subversion, GIT, Mercurial - Network services and server-side applications: C++ and PHP (TCP/IP, UDP, Ajax, REST API, WebSockets) - Design server architecture for high loading services - Strong mathematical skills and physics knowledge. - IDE: Xcode, Visual Studio, Qt creator, Eclipse - Installers: InnoSetup, BitRock installer, NSIS, Advanced Installer, Packages for Mac - Acceptance tests for Web: CasperJS/PhantomJS - Unit testing for C++ and PHP code. I can read following languages: java, python, c#, perl. And the last, but not least, you get what you're paying for. If you prefer to use the cheapest developer to established and known expert, then please do not contact me. Thank you.

Associated with: CycloneSoft

100% Job Success
$45.00 /hr
426 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

Dmitry Paramonov

Dmitry Paramonov

Python System/Web Developer

Russia - Tests: 5 - Portfolio: 3

Python is my favourite language and I use it for implementing various system utilities and web backends (with Django framework). I am a server-side guy but despite this I also know how client-side (JavaScript, etc.) stuff works. Besides Python I like functional languages: Haskell, Ocaml, Lisp (Scheme) but they are just my hobby.

100% Job Success
$27.78 /hr
1,777 hours

Girish V.

Girish V.

Perl,node.js and TCP/IP networking expert

India - Tests: 7 - Portfolio: 4

Girish is a seasoned UNIX professional with rich networking experience working with protocols, low level protocols encoding, solving tough interop issues, reading RFCs, implementing standards, working on e-mail spam control, mail servers, firewalls etc. Also have excellent node.js and jquery skills. I am also experienced in MEAN, mongodb, facebook integration, oauth2 et al Specific expertise is on OpenBSD, perl coding, C and web technologies such as jQuery , javascript and products development. Familiar with IPsec, L2TP, OpenVPN, PPTP VPN technologies, spam control, email technologies. Also experienced in security areas, crypto, algorithms and UNIX environment's challenges and technologies. A systems programmer with high focus on programming correctness and efficiency.

74% Job Success
$44.44 /hr
302 hours

Muhammad U.

Muhammad U.

Oracle Siebel CRM, Joomla, Smart Card, Java Card

Pakistan - Tests: 4 - Portfolio: 4

From last 5 years I have been developing tools, working with Enterprise solutions and developing websites for internal and external purpose. I have 03 years of experience working with Oracle Siebel CRM. I have been working in IBM as a Siebel Configurator on a challenging PTCL CRM project. I have complete knowledge of Siebel Configuration, Siebel objects, Siebel Web services, Siebel Integration, Siebel Components, Data Maps, Applets, BCs, Business Services, Workflows, Integration Objects etc I also have vast experience of Smart Card, SIM Card and high-load website projects, I would like to get long-term relations with customers. I am Proficient in client/server applications development and maintenance. Hard-working, Fast Learner with good communication skills. I also possess extensive knowledge in the following areas: Java, Jquery, Java, script, SQL, Ajax, OOP, and software design and testing and quality assurance.

$15.00 /hr
0 hours