Platform Design and Migration in the Real World

1. Mariya Mladenova / Zalando Platform Design and Migration in the Real World #teqnation2019

2. Agenda 1. Triggers for change 2. Platform Design: Goals and Methodology 3. Migration Journey 4. Facing Reality 5. Wrap-up and Q&A

3. Triggers for change Zalando

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9. Triggers for change Monolith to Microservices Maintainability Efficiency Split of team responsibility Ease of technology experimentation Scalability DevOps Support Fault Tolerance Because everyone else is doing it*

10. Triggers for change Monolith to Microservices

11. “In an industry where new technologies rapidly gain market traction, the pure organizational cost of maintaining and attempting to improve a cumbersome monolithic application is simply not practical.” Susan Fowler

12. Triggers for change A set of building blocks that can be selected and combined to form different products Processes Platformization Platform services A group of technologies used as a base for other processes and applications Tasks Decisions Resources Clients Stock Network view Topologies

13. Platform Design Technical Requirements Step 1 Capabilities Current Industry standard Additional Current Planned Desired Step 2 Goals and Methodology Processes Applications Interfaces Executors, Decisions, Network

14. Platform Design Step 3 Domain Objects Tasks (Inbound/Outbound) Inventory/Stock Processes Resources and Workforce Goals and Methodology Physical Layout

15. Migration Journey Business Justification exponential growth and complexity gaps or instabilities in current implementation

16. Migration Journey Common Issues Monolith Decoupling Database Migration and Data Splitting Communication Effort Estimation among Services Library conversion effort DevOps infrastructure People’s minds requires effort Expected long-term ROI*

17. Migration Journey Planning a full migration New Features and Services Features and Services for Optimization Migration Steps Migration of Functionality migration + value List of steps + Ranking by Value

18. Facing Reality Conway’s Law Ability of Systems to Fail Microservice Architecture Trade-offs Technical Sprawl Competitiveness for Engineering and Infrastructure Resources

19. Facing Reality Things we did well NOT COOL

20. Facing Reality small steps first optimism bias Lessons Learnt & Future know yourself still at the start inspire the business

21. Wrap-Up Contact me @: https://www.linkedin.com/in/mvlml/ mariya.mladenova@zalando.de

22. Thanks for your attention! #teqnation2019