Taxify engineering presentation - DevTernity
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- 3. 2 click taxi ordering service
- 4. Android Client Android Driver App iPhone Client iPhone Driver App Cloud & backend systems Dispatcher Dashboard VOIP integrations PBX systems Back-office systems Taxi company Dashboard Windows Phone client Business Dashboard Button Web app client Driver portal HTTPS protocol
- 6. ● Event-driven and non-blocking, ideal for web services ● Well suitable for SOA and high throughput applications ● Everything about HTTP(S) is supported ● Single threaded ● Scripting language, no build ● Well supported in the cloud
- 7. Driver polling Search Client apps Driver apps Node.js subsystem Mobile apps Google Distance Matrix 3rd party services90% of requests below 4ms HTTPS protocol (lat,long,state) (lat, long, state) Tracking
- 8. Data driven - statistics system
- 9. Database 1 Database ... Database N Backoffice for statistical queries Solution to statistics - MapReduce and pre- compute ? - real-time query - something familiar - minimum effort for scale - store everything Mobile apps
- 10. Move to cloud Database syncer service AWS S3 Database 1 AWS Redshift cluster Database ... Database N Redshift syncer service Statistics API, AWS Mobile apps Backoffice Query API, AWS Beanstalk service (RO)
- 11. Services access pattern 13th Friday (November)
- 12. New Year’s eve 5x bigger no change
- 13. Challenges and opportunities Client application interaction design and overall user experience Big data & geospatial analysis
- 14. What happened ?
- 15. End of month, good weather Start of month, good weather Second week, little rain Non-stop rain, holiday & independence day on 18th Rides: Tue & Wed in Riga Tuesday-Wednesday over a 4w period
- 16. Supply vs demand
- 17. Demand prediction, but where ?
- 19. Demand prediction Combine historical data with real-time data ● city ● seasonality ● local events ● weather ● payday ● real-time road/traffic conditions ● national holidays ● media coverage ● Taxify discounts/campaigns
- 20. Route and maps Map heavy (map to road) Price calculation and prediction Accuracy of ETA Efficiency, what time is drop off, can we queue next order ?
- 21. Route correction - Prague tunnel
- 23. ● Taxify- in 9 countries ● 5 apps, 22 systems ● Mostly async real-time ● Challenges in UX ● Opportunities in data science ● Q & A Monthly rides