I am working on this new project to monitor signals from an STB box. I need a PI box to interface with the STB and i am looking for a PI developer? How do I hire someone?
Start by identifying what skills are required.
If you are unsure what skills you need hire a project manager.
For instance do you need someone who has ever used a Raspberry Pi? The Pi is just a generic ARM based system that commonly runs a flavour a Linux. Do you need an electrical engineer or just a code monkey?
What are requirements of the project? speed/cost/reliability/maintenace
Is this a full time role or contract?
Employment agencies will be able to steer you to candidates that are already offering their skills in a specific field, STB, python etc.
and then there is always http://careers.stackoverflow.com/uk/jobs