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Postfix SMTP Server Upwork freelancers typically receive a client rating of 4.80.

Last updated: October 1, 2015

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Eugene Miller

Eugene Miller

PHP/Python/PostgreSQL/MySQL/jQuery Developer

United States - Tests: 3 - Portfolio: 1

Hello, thanks for your interest. I'd love to work on your project, however I'd like to set a few conditions if you hire me. If there is more than 1 dev on the team I insist on peer review and a version control system - I prefer git & github however I'm not opposed to bitbucket and gitlab. Even if I'm the only dev, we should probably use a version control system. I'm also a firm believer in writing tests so changes in one part of the code will not break other parts, it's saved my bacon several times. Testing is one reason why I love working with Flask, and angular.js looks very promising. I would love the opportunity to work on a project that uses angular.js. Even if you don't hire me please implement peer review. That way when you hire me in the future your team is already set up with good habits. Here are a few good articles on the importance of peer review. Now that I'm done with the peer review PSA (Public service announcement.) Allow me to brag about myself. Over the last 11 years I have taught myself how to program in PHP and Python. I entered my first Basic program into a computer when I was in 3rd grade. I love using jQuery to make a site pop. I run my own .com from home with a Linux server on site. This has given me much insight into how servers are maintained, and backed up. I have set up and maintained the following servers Postfix(email), Apache(http), Nginx(http), Open-ssh(ssh) and used Supervisor and Gunicorn to deploy python web apps. I'm also an avid listener to several podcasts, such as Security Now, Linux Action Show, Techsnap and Coder Radio just to name a few of my favorites. Due to the nature of the NDA (Non-disclosure agreement) I can not list what sites/companies I've worked for, I will however tell you what we've used, and a vague description of the work we've done. On a couple of different projects we've used basic google maps, twitter, and facebook api. Some other common js/css libraries are moment.js, bootstrap, and chosen jquery plugin. Most recently I've been doing backend work. This include python, Flask, Flask's restful api to build the backend for an iphone/android app as well as a web front end to administer the data. The iphone/android dev team created the app with Sencha which I deployed using an nginx server. I also helped develop booking software. This includes reports, calendar, artist/user profiles, timezone management, traveling, accommodations, fees, commissions, venues, repertoire and currency conversion. To date, this has been the most challenging and rewarding project for me. The team I work with are extremely talented. We used Python, Flask, Mako, MongoDB, jQuery, Backbone.js, Underscore.js and Java. With another project we parsed PDFs about [undisclosed] and put the information into a database that could then be searched through based on the information mentioned in the PDFs as well as attaching an expiration date to the information parsed. Other accomplishments include a picture labeling program for HUD home inspections that would insert images into a .doc file when needed. It used a lot of jQuery/ajax calls to assign a case number, address, city, state, zip, and classification with lots of auto-complete. The database was MySQL, and I used headless instance of OpenOffice/LebraOffice with a the pyuno bridge to generate the .doc files. I hosted/managed this site for several years, and developed it as new features were needed. I parsed PDF files to get case information, as well as cut out specific pages that needed to be printed, and sorted them out for specific agents. For another project we used a combination of MongoDB, SOLR, MySQL and CodeIgniter. At the time I left we were in a transitional stage converting the site from an affiliate e-commerce/auction model to an advertising model. This project started out using MongoDB and eventually migrated to MySQL. In my spare time I'm developing a Family Media Player It uses pygtk to render it's gui, postgresql for it's database, and gstreamer to play the audio/video. I've been focusing my development efforts on creating a web frontend that utilizes Flask so it can all be controlled via a phone or tablet.

100% Job Success
$27.78 /hr
3,716 hours

Daniel Yavorovich

Daniel Yavorovich

System Administrator

Ukraine - Portfolio: 1

Operating Systems ● FreeBSD ● Linux Security ● iptables ● openssl ● jail ● clamav ● mod_security ● mod_clamav DNS ● Bind ● PowerDNS (+PostgreSQL / +MySQL) HTTP ● Apache ○ MPM: prefork, worker ○ mod_ssl, mod_php, mod_wsgi ● Nginx ○ Access control ○ Autoindex ○ Fast-CGI ○ uWSGI ○ Proxy ○ Cache ○ SSL ○ upload_progress_module ○ Control panel integration ■ Virtualmin ■ DirectAdmin ■ Plesk Proxy ● squid ○ basic auth ○ transparent proxy ○ cache ● 3proxy ○ http/socks ○ auth Raid ● Linux ○ md(0,1,5,6,10) ● FreeBSD ○ Gmirror / Striping File Systems: ● Ext 2,3,4 ● ReiserFS ● XFS ● OCFS2 ● ZFS (port to FreeBSD) ● CEPH CVS ● SVN ● Mercurial ● GIT ○ GitLab ○ GitoLite Backup ● rsync ● BackupPC ● Bacula FTP ● ProFTPd ● VSFTPD File sharing ● NFS ● SAMBA Control Panel ● Direct Admin ● Webmin+Virtualmin ● CPanel ● ISP-config ● Plesk Automatization ● Puppet ● Saltstack Monitoring ● Zabbix ● Nagios ● Munin ● Monit Network Understanding of theoretical and practical foundations of the networks (Data link, Network, Transport, Application Layers). VPN ● OpenVPN ● PPTP Database (SQL) ● MySQL (+MariaDB, +Percona) ● PostgreSQL Database (NoSQL) ● ElasticSearch ● Riak ● MongoDB ● Cassandra ● Redis Virtualization & Containerization ● KVM ● XEN ● OpenVZ ● LXC ● Docker ● Vagrant Cluster ● DRBD ○ master-slave ○ master-master (+ocfs2) ● Heartbeat ● Pacemaker Development ● actively use: ○ shell (bash, sh) ○ Python ● Frameworks ○ Django ○ Flask ○ Twisted ○ Tornado Cloud Solutions: ● AWS (EC2, S3, CloudFront, Route53) ● DigitalOcean ● RackSpace

100% Job Success
$33.33 /hr
46 hours

Denis Lemeshko

Denis Lemeshko

Unix Administrator


I have large experience in: * Linux/FreeBSD maintaince/troubleshooting (RHEL, Centos, Debian, Ubuntu), * Networking (dhcp, DNS:bind/named, vpn: openvpn/pptp, firewalls: iptables/ipfw, qos, proxies), * Web servers (apache, nginx, lighttpd), * Mail servers (exim, postfix, antispam/ antivirus: clamav/spamassassin, dovecot), * Bulk marketing (Dkim, spf, high speed/inboxing, interspire), * Automation (perl/shell/awk scripting), * Monitoring (nagios, zabbix), * Hosting panels (ISPmanager).

$11.11 /hr
0 hours

Alexander M.

Alexander M.

Software Developer C++/Qt

Ukraine - Tests: 2 - Portfolio: 5

Software Engineer with 10+ years of diverse experience in software development, systems administration, and database administration. Developer of the opensource report solution CuteReport:

$45.00 /hr
1,307 hours

Jayson Cena

Jayson Cena Agency Contractor

Linux(Debian/Red Hat),Oracle DBA, Linux Cluster Admin,Virtualization-H

Philippines - Tests: 4

To obtain a position that will enable me to experience and learn new ideas on system administration like complicated enterprise infrastructure design specially high-availability and fault-tolerant infrastructres. My core competency lies in designing new system infrastructure using open-source software. I also have some experience in VB6, ASP, PHP.

Associated with: ClusterFoundry Agency

$26.67 /hr
1,137 hours

Maxim Putilin

Maxim Putilin

System Administrator (AWS/LAMP/Windows/Linux/DevOps/Clouds)

Ukraine - Tests: 4 - Portfolio: 4

Expert in AWS, server infrastructure migration, monitoring and securing, LAMP, Windows and Linux Servers setup and administration (including HA and clustering), DevOps. 100% positive feedbacks. I have 7 years of team work experience as system administrator. I'm quick learner who enjoy learning and mastering bleeding edge technologies and improvement of professional knowledge, self-motivated and self-organized. Have experience in deploying and maintaining of: Cloud Computing Platforms: Amazon Web Services (EC2, S3, RDS, VPC, Elastic Beanstalk etc); DevOps tools: Vagrant, Chef; Server operating systems: Ubuntu Server, CentOS, Windows Server 2003 - 2012R2, Amazon Linux, Debian, RHEL; Web servers and servlets containers: IIS, apache, tomcat, JBoss, IBM Websphere; Mail servers: postfix, MS Exchange, IIS SMTP, hMailServer, cyrus; Database servers: MySQL, MS SQL, Oracle DB, PostgreSQL, MongoDB, DB2; Virtualization: MS Hyper-V, MS Virtual Server, VMware Server, Xen Server, VirtualBox, OpenVZ; Directory service: Active Directory, OpenLDAP; Ticketing systems: mantis, jira, redmine, trac, freshdesk, trello; File servers: IIS FTP, proftpd, FileZilla FTP Server, samba; Firewalls: ufw, Windows firewall, iptables, firewalls on MikroTik and other routers; IT Infrastructure Monitoring: nagios, Pingdom; Webhosting Control Panels: WHM/cPanel, Webmin, Directadmin, plesk; Proxy Servers: squid; VPN Servers: pptpd; Collaboration version control systems: git, svn, cvs; Clustering: MySQL on DRBD, Heartbeat, MongoDB Replication, RabbitMQ; Continuous integration systems: Hudson/Jenkins, Apache Continuum; Instant messaging servers: ejabberd; Message brokers: RabbitMQ (include clustering); Customer Relationship Management Systems: MS CRM, Odoo/OpenERP; Enterprise Content Management Systems: MS SharePoint, EMC Documentum, OpenText LiveLink, Lotus Notes, Oracle Content Database and Oracle Records Database; Rapid web application development platforms: Adobe ColdFusion.

93% Job Success
$19.00 /hr
150 hours

Arnaud B.

Arnaud B.

Linux admin & Opensource Integration specialist


17+ years in computing. Working daily with linux since 1998. Familiar with web and technical/complex architectures. Freelancer since 2004. Operating systems : Linux (redhat, centos, debian, ubuntu), packaging (RPM, deb) Programming languages : Perl, PHP, Unix Shell, SQL Infrastructure tools : Email (postfix, exim) , SNMP, nagios, cacti, LDAP, Network tools : Web servers (apache, lighttpd,..), TCP/IP, DNS (BIND), Haproxy, NGINX, LVS, VPN,... Web techniques : Cloud, Web clusters and high availabiity techniques

$55.00 /hr
0 hours

Offshoreit Support

Offshoreit Support Agency Contractor

CEO and Founder

India - Tests: 3 - Portfolio: 1

Offshore IT Support is a leading Technical Support Company that provides Outsourced 24/7 Technical Support, Remote Server Administration, Server Security, Linux/Windows Server Management, Server Audit and Helpdesk Management to Datacenters, Hosting companies and ISPs around the globe. With over 5 years experience in working with major hosting providers and data centers, Offshore IT Support is the first company of its kind who provides “Expert Call Back” feature to the customers. I have well rounded knowledge and hands-on experience in the following areas: Windows Servers Win 2003, Win 2008, MSSQL Server, IIS , Azure, Apache, IIS, Amazon Web Services, Dedicated Server, VPS. WHMCS. Linux configuration, maintenance & troubleshooting for RHEL, Centos, Debian, Ubuntu Virtualization: Vmware, Openvz, Virtuozzo, Xen, KVM, vserver, Cloud hosting: Amazon EC2, AWS, S3, Cloud Computing, Digital Ocean, VPS, Networking (dhcp, DNS:powerdns/bind/named, vpn: openvpn/pptp, firewalls: iptables, proxies), Web servers (apache, nginx, lighttpd, tomcat), Mail servers (exim, postfix, qmail, antispam/ antivirus: clamav/spamassassin, courier, dovecot), Hosting panels as Cpanel/WHM, Plesk, Directadmin, WebsitePanel.Webmin, DirectAdmin, Virtualmin & Vestacp SSL Certificates : Symantec, Digital certs, Go daddy. Verisign Thwart etc... Networking: Active Directory,Group Policy, DNS, DHCP, FTP, VPN, NFS, RAID, DHCP, DNS, DFS, VPN, WDS, RRAS, TS server, NAP, Proxy server, Windows Failover clustering,Network Load Balancing (NLB), Remote Desktop Services. Storage: Configure NAS and SAN, Openfiler NAS/SAN, Starwind SAN. Backup: R1 Soft, Windows NT Backup, Shadow Protect, Configure and troubleshoot the backup issues. CCNA: IP addressing sub-netting, IP Routing Routing Protocol, EIGRP, OSPF, ACL, Frame Relay connection, NAT/PAT, Virtual LAN, WirelessLAN.

Associated with: Offshore IT Support

$11.00 /hr
11 hours