Remote Config and Beyond
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Ayushi Gupta, an Android engineer at Hotstar, outlines the platform's growth to over 350 million downloads and 100 million daily users. The document discusses the shift from a monolithic architecture to a modular approach for agility, enhancing user experience, and leveraging remote config for feature release management. Challenges include managing numerous A/B tests and optimizing for developer efficiency while maintaining support for older app versions.
Remote Config and Beyond
- 1. Remote Config & Beyond!
- 2. Hello ! I am Ayushi Gupta Android Engineer at hotstar You can reach me out at: Twitter : @22guptaayushi Email : ayushig@hotstar.com
- 3. About Hotstar ● #1 OTT platform in India ● Over 350M+ downloads ● 1 Day,100M users, 2.5X increase in concurrency ● Available in >15 languages ● Variety of content ○ Live/On-Demand ○ Sports/News/TV/Movies ○ Regional Catalogue
- 4. Let’s talk about scale 2012 8M Felix Baumgartner’s Supersonic Jump YouTube 2018 3.1M NBC’s Super Bowl NBC Sports App 2018 10.3M IPL 2018 - Finals hotstar May 2019 18.6M IPL 2019 - Finals hotstar July 2019 25.3M World Cup - India vs New Zealand hotstar
- 5. Product Goals ● AGILE Development ● Many apps solving only one problem ● Develop Seamless User Experience ● Release features progressively ● Keep App size low ● Customer obsessed decisions on scale
- 6. Client journey to 25M
- 7. Legacy App : Not Agile ● Releases were super slow (6 week cycle) ○ At scale, feature release was risky ○ More cautious development ○ High validation time ● Risk taking abilities ● Too many hotfix rollouts ● Monolithic legacy architecture
- 8. Engineering Requirements ● High Risk - High Return at Scale ● Minimise the blast zone ● Move away from “Monolithic Legacy Architecture” ● Improve engineering hygiene ● Bring down engineering cost ● Increase agility ● Adopt new design guidelines! ● Create smoother and seamless experience
- 10. Rewrite vs Refactor Rewrite Refactor ● Modify existing working code. ● May require longer time ● Understand existing logic. ● High engineering cost ● No backward compatibility ● More risky ● Change features drastically. ● Cleaner approach ● Refer requirements ● More testing
- 11. Scale Factor ● 300 million devices to update ● It’s not a backend ○ Rollback needs time ○ There is always residual users ● Backup plan - A must have! There are still 0.5% users on our oldest version!
- 13. Building from scratch ● “Don’t mess with something which is already Working” ● Smart combination of rewrite & refactor ● Define new architecture - MVVM ● Feature by feature movement
- 14. Old Search ● Simple, naive UI ● Multi - step search ● No smart option availability
- 15. User Preferred Search ● New hypothesis ● Implement new design ● Can’t risk existing user experience. ● New code from scratch
- 16. Quest for Config Management
- 17. Need of the hour User Targeting 2 Feature GatesFeature Gates1 Scale 4 A/B Experiments3
- 18. Rolling Upgrade ● Release one feature at a time ● A/B controlled updates ● Measure feature key metrics ● Measure user experience via funnels ● Decision to switch to B!
- 20. Remote Config to rescue ● Change behaviour of app at runtime ● Handles the caching by its own ! ● Release gently and feature gating ● Quirks:Propagate Remote Config updates in real time !
- 21. Preferred search results ● Reduced searches ● 6% faster search for User ● Faster discovery of content ● More Watch Time Old Search New Search Time No.ofsearchedevents
- 22. ● Keep full support for older screens ● Don’t break what is working ● Adapting to changing backend Resiliency
- 23. Shiny rocky ! ● Super modular ● Highly agile app ● Every week release cycles ● Adaptive to fast moving changes ● Every feature gated , releases ● A/B experiments ● Accident management
- 25. Challenges with Remote Config ● Huge numbers of keys at config ● Many A/B experiments running simultaneously ● Limit Access in Production ● Optimise Developer Time ● Different Builds for Different Product Requirements
- 26. Hotstar Config Editor ● In app Config Editor ● Enable only for DEBUG Builds ● Key Name based Search
- 27. ● Instant change ● No server call ● One build for all Hotstar Config Editor
- 28. We have some ideas!
- 29. Thank You !
- 30. Any questions ?
Editor's Notes
- #7: Now let me give you a small walk through of client’s journey to the scale of 25 Million.
- #10: Let’s take a walk through across the biggest client project that happened in Hotstar - Project Rocky .
- #20: So we finally thought to take a bet on Firebase Remote Config.
- #25: Now let’s go beyond Remote config
- #32: Hello Everyone ! Welcome to the talk. I will be talking about how and why we used Remote Config @ Hotstar. I will be sharing my learnings based on evolving the Hotstar to every user reach across the world.