Continuous Delivery on Mobile

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Continuous Delivery on MOBILE Delivery of Things World Berlin - 25.04.2016

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Alexander Greim Magith Noohukhan Evangelist at XING @magithn Director Mobile Engineering @iltempo

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For a better working life

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Background 5

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6 Successful Web Business

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Rapid growth of mobile usage 7

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Evolution of Mobile at XING

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How We Built Mobile Apps Before 9 • Single agile team with 4 developers + QA • Building every facet of the app • Collaboration with domain teams

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Growing Demand Inside the Company 10 • Mobile use cases • Additional products • Increased user activity

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Scaling Mobile at XING 11 1. Split apps into modules 2. Build a release train 3. Make all teams mobile-ready

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1. Split Apps into Modules 12 • Loose coupling of sections • Shared libraries …

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2. Build a Release Train 13 • Frequent, periodic releases • Fixed dates, ﬁxed quality, variable scope • Stabilisation phase

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3. Make All Teams Mobile-Ready 14 • Hiring additional developers • Onboarding in central team • Training QA, UX, Product … Fully functional agile team

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Development Process

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Development Process in Teams • Focus on rapid value delivery • Planning and release contribution • Assuring functional quality 16 Iteration Analyse Develop Test Design Upstream α α

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“Assure quality from the very beginning of development.” 17

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Release Train Process 18 • Driven by the Platform Team • Assuring ﬁnal quality • Highly automated

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Platform QA Pre-Release Stage or  Review LIVE PRE 19 Team Team 19

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Releases every 2 weeks!

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“Be strict. Stick to the time plan precisely. There is another train upcoming.” 21

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“Avoid rollbacks. Going back is tricky and expensive.” 22

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What’s special about releasing on Mobile • Packaged software • High fragmentation • Automated testing still complex 23

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Android Device Fragmentation 24 Source: Open Signal Android Fragmentation Report - http://opensignal.com/reports/2015/08/android-fragmentation/

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iOS App Store Review Times 25 Source: http://appreviewtimes.com/ios/annual-trend-graph

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What’s Ahead: Optimising Time to Market • Reducing rollout time by 40% 26 QA Pre-Release Development Stage LIVE Rollout Time

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Thank you for your attention.