The hype and excitement around micro-services and shiny new technologies means we commonly overlook the big, hairy mammoth in the room: legacy monoliths. Comprised mostly of tribal knowledge and spaghetti code, they're hard to work with and deeply understood only by a few experts. So when it's time to update legacy code, these experts become bottlenecks. Join Atlassian developer Peggy Kuo as she provides you with practical ways to help the people on your team understand – and tame – the legacy monolith.

1. PEGGY KUO • SENIOR DEVELOPER • ATLASSIAN • @PYKO
Taming the
Legacy Monolith

3. legacy monolith

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Credit: Benny Lee

8. write tests

9. rewrite

10. Don’t do this

11. the expert

12. bottleneck

13. team

14. understanding

15. bus factor

16. What now?

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19. FEAR

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Credit: Okko Pyykkö

21. Do this instead

22. the expert

23. Common techniques

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brown bags

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pair programming

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code reviews

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over the shoulder
code reviews

28. More techniques

32. Improve

33. Credit: Jens Tärning

34. Credit: Lemon Liu

35. Credit: Vicons Design

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Credit: Susanne Nilsson

38. more people
=
less bottlenecks

39. more people
=
find bugs

40. more people
=
improved code

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imagine…
Credit: Davide Restivo

42. Code
reviews
Pair
programming
Brown
bags

43. HelpOwnership Environment

44. Write testsRefactorDelete code

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46. Thank you!
PEGGY KUO • SENIOR DEVELOPER • ATLASSIAN • @PYKO