Starship Enterprise: Functional Programming at Huge Companies

on YouTube ↗31m

" summary

JPMorganChase runs a production Scala codebase that converts diverse ASTs (Smithy, GraphQL, UML, proprietary tools) into a single metamodel so a metadata platform can reason about data contracts and generate code and dictionaries. The team implements generic derivation (Scala 3 mirror API) to derive schema and, with modest extensions, values at runtime. It runs in production, took years to stabilize, and forces tradeoffs around CI/CD, hiring, and ecosystem maintenance versus clearer correctness and reuse.

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" chapters (7)

1. 0:00Functional programming intro
2. 3:52Technology landscape in large organizations
3. 10:11Common metamodel with derivation
4. 15:25Pitching FP to management
5. 22:47Sustaining FP teams
6. 27:41Evangelizing FP techniques
7. 30:10Conclusion & business case

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