Antronics Ltd provides consultancy and embedded firmware development services on a contract basis, with particular experience in GSM & M2M applications
Clients have ranged from big-names like BT to small, local start-ups
Key competence is interfacing, control, and communication with embedded microcontrollers. We may also be able to assist with relatively "low-level" PC software - especially involving serial communications - such as is often required during the development & testing of embedded devices.
There are no discussions here currently, but as they appear they might have answers you need.