Hailo is building the world's best taxi app -- we're already in 9 cities worldwide, have 300,000 registered passengers, and are growing (30%+) every month. Of course, that presents a serious infrastructure challenge.

I'll explain how we've built our service around tools that have three key NoSQL characteristics -- they're all distributed, resilient and operationally simple. The particular goals we set ourselves were around making it easy to replicate our architecture as we launch in new cities, to scale as we grow in each city, while all the time being able to coordinate that setup in a straightforward way. I'll describe:

• Our multi-city setup, and cloud-based architecture
• How we use Cassandra for distributed primary storage
• How we use Acunu Analytics for real-time analytics and operational insight
• How NSQ provides distributed queuing and joins together our services