Mexico City may not be the best locale for Database Design job ads. For now, Jobspotting counts only 9. Maybe, you could try slightly farther afield. Employers are primarily employing Web Development employees, but also Java experts. To be in with the best odds of finding a job in this area, learn about fields like Relational Databases, Stored Procedure and Database Theory.
Companies are at the present moment mostly seeking experienced Database Design employees. 88% of job ads on Jobspotting at the present moment require many years of work knowledge. On Jobspotting at the present moment, there are no startup companies offering vacancies that have to do with Database Design. Why not have a look at vacancies in another country to compare and contrast opportunities. Just use the Explore tab.