No biographical details are currently known.
With only a small known filmography, all in rather miniscule roles, it could be very possible that there may be some additional uncredited roles to be found. Since starting his topic I have discovered he has a second IMDb page under "Joaquin Ferrer", a spelling he was credited with on 3 occasions - this has added a further 3 roles to his filmography. From the films he appeared in it would appear that he was mostly based in Barcelona.
- Los cuervos .... Representative of Don Javier (credited)
1962 - La spada del Cid .... Villager who recognises the sword (uncredited)
- Los atracadores .... Priest at the execution (credited)
1963 - A tiro limpio .... Victim in office hold-up (uncredited)
- La cuarta ventana .... Man with the girls in the nightclub (credited as "Joaquin Ferrer")
- Noche de verano .... Associate of Alberto (credited as "Joaquin Ferrer")
- Senda torcida .... Cinema manager (credited)
- Trampa mortal .... (credited as "Joaquin Ferrer", but not found)
1964 - El mujeriego .... Lawyer (credited)
1965 - Pistoleros de Arizona .... Card player (uncredited)
- Una pistola per Ringo .... The Judge (uncredited)
1966 - Cuatro dólares de venganza .... Tribunal judge (uncredited)
1968 - La 'mini' tía .... Taxi driver (credited)
1970 - Percy Stuart (TV series) S. 3, ep. 7: "Der Koffer" .... Man at baggage claim (uncredited)
1972 - El triangulito .... Shop customer testing the bed (credited)
- Adiós, Priscila (1964 TV episode - Novela) IMDb
- Hoy sube el novio (1964 TV episode - Novela) IMDb
- Nuestro amigo el libro (1964 TV series) Ep.: "El falso Don Gil", IMDb
- Sospecha (1964 TV series) Ep.: "Un solo error", IMDb
- Imaginando la oscuridad (2021 documentary) IMDb (under "Joaquin Ferrer" profile) as Self. The chances of him still being alive to appear in a documentary in 2021 seemed extremely improbable, and indeed the "Joaquin Ferrer" here is a Cuban artist of the same name.