The firm - which is based in the Midlands city - saw off competition from a host of big names in architecture and masterplanning.
These included AZHAR architecture, DSDHA, FAT, S333, Kinetic AIU, Jeppe Aagaard Andersen and Sarah Wiglesworth.
The uses for the 1.9ha site, which has long been earmarked for regeneration, include a film centre and auditorium, an art gallery of international stature, a hotel, up to 600 new homes, flexible business space, cafés, bars, shops and restaurants.
Kinetic AIU director Bob Ghosh said he was very pleased to have won: 'We are surprised but delighted to be selected for the Warwick Bar project.
'When we started the design process a couple of months ago, we were somewhat daunted by the list of international competitors, but this gave a good indication that [developer] ISIS was demanding a world-class response to what we believe is one of the finest waterside sites in the country.
'However, we had a strong yet simple idea for the site, which will create an intimate network of carefully crafted streets and squares, which have a dynamic relationship with the canals and Birmingham's forgotten river.'