The Upwork Android SDK by Upwork allows implementation of freelance search features in Java language. Formerly known as eLance, Upwork provides an API with integration of users, jobs, companies, contracts, payments, and reports features.
APIs open up a lot of unique opportunities that require engineers with diverse skill sets. You can see this in both the engineering and evangelism roles below from Stormpath, Xero and Klout. Being a polyglot is as important as ever, especially when the technology you're building by definition can work with everything else.
Careeronestop, sponsored by the U. S. Department of Labor, Employment and Training Administration, provides an API to gain access to their broad range of tools for finding a job, or upgrading a career.