IT roles cheat sheet for recruiters

This cheat sheet contains general skills and experience that you can assign to the different IT roles. This assistance certainly does not include every technology, but should help you to identify potential applicants for specific roles

Back End Developer

Java, C, C++ or C#
Ruby or Sinatra, Python, PHP (Typically more popular with front-end or middle-tier developers and often self-taught)
Node.js
Database Technologies
Relational variants: SQL, MySQL, Oracle, Postgres
NoSQL flavors: Redis, Cassandra, DynamoDB, MongoDB
Experience with APIs
Systems Experience - System Administration, Linux, Cloud Computing Services (AWS, Rackspace, OpenStack)

Software Developer (middle tier)

This role is very similar to the back-end role and associated skills (possibly with no database or systems experience). Front-end skills may also be associated with the role. The overlap is usually stronger with the back end.

Frontend developer or web developer

HTML, CSS
Javascript (Including JavaScript frameworks like Ember.js, Angular.js, Backbone, etc.)
Ruby on Rails, Python or Django, PHP, ASP
Flash, Actionscript (Used to create Flash animations)
Photoshop

Database Administrator (DBA)

The ability to create and optimize SQL queries
Designing data schemas
Experience with one or more of the most important relational databases: SQL Server, MySQL, Oracle
Database configuration and administration

DevOps-Engineer

Basic scripting experience in languages like Python, Perl, Ruby or shell scripting (aka Bash or Unix)
Possibly other languages too
SQL knowledge
Experience with monitoring tools like Nagios, Munin, Splunk, Zabbix, etc.
Experience with one or more cloud service providers such as AWS, Rackspace, OpenStack, etc.
Best possible operationalization of deployments, releases and maintenance

System administrator

Unix, Linux or Microsoft system administration
Basic scripting or programming experience (Shell Scripting, Perl, Python, Ruby, etc.)
Experience with monitoring tools like Nagios, Munin, Splunk, Zabbix, etc.
Operational best practices for releases and maintenance
Experience with internal IT such as VPNs, printers, IP-based phones, technical support, etc.
Experience setting up and securing servers and databases

Network administrator

Experience in setting up networks (company networks, data centers, etc.)
Knowledge of switches, routers, firewalls and other network hardware
There is likely to be some overlap with sysadmin skills

Data Scientist

Strong knowledge of statistics, possibly other advanced mathematics as well
Ability to create basic SQL queries
Some programming experience, probably in Python, Matlab, R, Java, Ruby or others
Machine learning or data mining skills

Quality Assurance Engineer

Ability to write test plans and test test cases
Knowledge of best practices for testing (e.g. black box testing, white box testing, unit testing, smoke testing, regression testing, etc.)
Selenium or other test automation tools