“Why JS is way to go for backend”

Denys Pysmennyi “Why JS is way to go for backend”

Transcript

1. Denys Pysmennyi Why JS is a way to go for backend
2. Will talk about • NodeJS to start project • NodeJS && Microservices • How to make back-end good again
3. DISCLAIMER: Language is just a tool, choose the right tool for the right job* *JS is still the best
4. Some stats stackoverflow dou.ua Google searches
5. NodeJS awesome for small projects • Easy to start • npm
6. NodeJS classic MEAN set-up
7. NodeJS classic MEAN set-up
8. NodeJS classic MEAN set-up
9. NodeJS classic MEAN set-up Express + ORM + Rest + generator(blueprints) = MVC https://sailsjs.com
10. NodeJS classic MEAN set-up
11. NodeJS awesome for microservices
12. NodeJS awesome for microservices • Speed • Restart time • Memory
13. NodeJS awesome for microservices • Speed • Restart time • Memory
14. NodeJS performance • Each metric shows different result • Golang is really good at concurrency • Js seems to be better at high concurrency then Java • PHP looks promising and scary
15. NodeJs performance (reqs/sec) https://medium.com/car2godevs/node-js-10-is-the-lts-the-enterprise-will-love-2395372a80c3
16. Ok, so how to build it?
17. What do we use in Taxify?
18. and we are hiring... • 15 million users • 500,000 drivers • 25 countries • 100+ developers • 100++ misro-services
19. What we use in Taxify? We’ve created our own framework
20. API generation Generated API Connect services Test Mocks Documentation, Visualization
21. Tests
22. Tests
23. Tests Component tests - balanced way for microservices Test Service DB Mock
24. Tests Component tests - balanced way for microservices Test Service DB Test Service DB Mock Mock Service DB
25. So how to build good backend • Good framework for api • Good and right tests • What else?
26. Monitoring
27. Deployment
28. Good Backend: dependencies • Check dependencies • NPM scripts(rm -rf) • Use NPM proxy: Verdaccio • nodesecurity.io
29. Good Backend: linters and code style • Little more Java, little less Ruby • Read some Uncle Bob • Choose code style https://github.com/airbnb/javascript • Configure Eslint Tslint
30. Good Backend: typescript • DefinitelyTyped lib • TypeScript 3
31. Good Backend: async/callback • Callback are ok if you know how to cook them • async/await • if you need more than 2 states: go with streams
32. Good Backend: async/callback • Callback are ok if you know how to cook them • async/await • if you need more than 2 states: go with streams
33. Good Backend: some others tools • Debug: chrome://inspect debug from browser • Deno - ts runtime from Node creator • GraphQL
34. Summary • Do NodeJS for fun • Do NodeJS for enterprise • Do NodeJS good
35. Thank you! Denys Pysmenny denys.pysmennyi@taxify.eu
36. JavaScript developer