Programming Languages / ORM

Java, C/Objective-C/C++, Hibernate, PL/ SQL

Service protocols

REST, HTTP/HTTPS, Token auth

Databases

Oracle, Berkeley DB

Operating Systems

MacOS, Linux, BSD

Other technologies & frameworks

Memcached, Google Protocol buffers, JUnit

Relevant IDEs / versioning tools

XCode, Eclipse, IDEA IntelliJ, Charles Proxy, Heap analysis tools such as MAT, TOAD for Oracle, CVS