The document outlines the process of developing an API ecosystem for the fintech industry, focusing on integrating various banks into a single application. It discusses the use of tools like OpenAPI and Swagger for designing and documenting APIs, as well as lessons learned throughout the development process. The author emphasizes the importance of communication, continuous evolution, and engagement with stakeholders for a successful ecosystem.

1. HOW TO DEVELOP AN
API ECOSYSTEM FOR
THE FINTECH INDUSTRY
FROMTHEGROUNDUP
nanovazquez.dev
@nanovazquez__
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2. Full-stack developer (15+ years)
International speaker
Engineering Director @
Microsoft MVP & Co-organizer of
conferences & meetups (ReactBA,
vOpen, DevDayAr)
A LITTLE BIT ABOUT MYSELF
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3. SCENARIO
WHATIS ?
3 . 1

4. We integrate private,
public and co-operative
banks
3 . 2

5. 2020
3 . 3

6. “ ISTHEFIRSTTECHSOLUTIONIN
ARGENTINATHATINTEGRATESALLBANKS
INASINGLEAPP
3 . 4

7. HOW TO DESIGN A SOLUTION
A.K.A.WHATWEINITIALLYDID
4 . 1

8. USE CASES TO IMPLEMENT
Onboard users to the platform
Send & receive money to & from friends
Pay with a QR code in a shop
. . .
4 . 2

9. “ WEUSEDOPENAPIANDSWAGGER
ASTHECOMMONPLACEFOROURAPI
ECOSYSTEMDOCS
4 . 3

10. SWAGGER + OPEN API
“ Swagger is an open source software
framework backed by a broad ecosystem of tools
that helps developers design, build, document,
standardize and consume RESTful Web services.
“ The OpenAPI Specification, originally known
as the Swagger Specification, is a specification for
machine-readable interface files for describing,
producing, consuming, and visualizing RESTful
web services.
4 . 4

11. Automated
docs portal
A mocked
service
Code
generation
4 . 5

12. Automated
docs portal
A mocked
service
Code
generation
4 . 5

13. Automated
docs portal
A mocked
service
Code
generation
4 . 5

14. Automated
docs portal
A mocked
service
Code
generation
4 . 5

15. LESSON LEARNED
LESSON LEARNED
4 . 6

16. LESSON LEARNED
LESSON LEARNED
SOMETHING WRONG OR MISSING? BREAK EVERYTHING!
#1
4 . 6

17. LESSON LEARNED
LESSON LEARNED
SOMETHING WRONG OR MISSING? BREAK EVERYTHING!
#1
INTEGRATE AS SOON AS POSIBLE
#2
4 . 6

18. “ WITHTHISINPLACE,WERELEASED
ONDECEMBER2020🎉
4 . 7

19. ECOSYSTEM V1.0
WEAREGA,NOWWHAT?
5 . 1

20. “ ISTHEFIRSTTECHSOLUTIONIN
ARGENTINATHATINTEGRATESALLBANKS
INASINGLEPLATFORM
5 . 2

21. “ TOP-D0WNAPPROACHESAREGREAT
FORTHEBEGINNING,BUTHARDERTO
MAINTAIN
5 . 3

22. NO BREAKING CHANGES
3 VERSIONS OF THE API similar to what node.js does
5 . 4

23. BETTER COMMUNICATION
OPEN & BIDIRECTIONAL and automated (as possible)
5 . 5

24. DOGFOODING
TEST OUR STUFF
puting on the client's hat (and
reducing friction between teams)
5 . 6

25. “ WEARETODAYBUILDINGTHE
FOUNDATIONOFALIVEECOSYSTEM,
EVOLVINGTOGETHER
5 . 7

26. ECOSYSTEM
PLANNEDEVOLUTION
6 . 1

27. SOLID FOUNDATIONS
6 . 2

28. SOLID FOUNDATIONS
KEY STAKEHOLDERS AS FEATURE CHAMPIONS (BETA TESTERS)
#1
6 . 2

29. SOLID FOUNDATIONS
KEY STAKEHOLDERS AS FEATURE CHAMPIONS (BETA TESTERS)
#1
NEWSLETTERS: FROM EMAILS TO REDUCED AUDIENCES TO ALL
#2
6 . 2

30. SOLID FOUNDATIONS
KEY STAKEHOLDERS AS FEATURE CHAMPIONS (BETA TESTERS)
#1
NEWSLETTERS: FROM EMAILS TO REDUCED AUDIENCES TO ALL
#2
IMPROVED ECOSYSTEM: NOTIFICATIONS VIA EVENTS
#3
6 . 2

31. SOLID FOUNDATIONS
KEY STAKEHOLDERS AS FEATURE CHAMPIONS (BETA TESTERS)
#1
NEWSLETTERS: FROM EMAILS TO REDUCED AUDIENCES TO ALL
#2
IMPROVED ECOSYSTEM: NOTIFICATIONS VIA EVENTS
#3
PUBLIC ROADMAP & ORGANIZE WORK WITH INITIATIVES/THEMES
#4
6 . 2

32. “ WEDON'THAVEALLTHEANSWERS,
BUTFORSUREIT'SGOINGTOBEA
GREATRIDE
6 . 3

33. THANKS!
QUESTIONS? @NANOVAZQUEZ__
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