Bilbao may not be the best place for Consultancy job ads. Currently, Jobspotting counts only 8. Maybe, you could try slightly farther afield. Why not check out the most dominant categories of SAP Software and Cloud computing, that the range of jobs can be broken down to. Proficiencies like Sales, Management Consulting, and Recruitment come up a lot in job ads in this area.
This is not the best time to search for Consultancy internship vacancies. Businesses are now almost exclusively recruiting trained job seekers. There are many employers as of now displaying Consultancy vacancies on Jobspotting, but none of these are startups as of now. 3 of 8 employers publishing jobs on Jobspotting, are recruitment agencies posting job ads for clients. Candidate preferences are paramount at Jobspotting. You can filter those out if you like. Use the region map at the top of the page to see where the offices are located.