Apidays London 2024 - Renovate to Innovate 5 by Rashmi Venugopal, Netflix.pdf

Renovate to Innovate: Fundamentals of Transforming Legacy Architecture
Rashmi Venugopal, Senior Software Engineer - Netflix

apidays London 2024 - APIs for Smarter Platforms and Business Processes
September 18 & 19, 2024

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3. Growth
Trajectories

4. What got you
here…

5. …will not get
you there.

6. What got you here
will not get you
there.

7. Takeaway 1 Legacy Systems are a
byproduct of success

9. Build the muscle to
transform legacy
systems

10. Takeaway 1 Legacy Systems are a
byproduct of success

Takeaway 2 Transform legacy systems
for long term success

11. Renovate to
Innovate
The Fundamentals of
Transforming Legacy
Architecture

12. Rashmi Venugopal

13. NETFLIX
TEXT
Agenda
—Legacy Systems
—What
—Why
—Technical Renovation
—What
—When
—Strategies

14. First word when you
think of Legacy?

15. NETFLIX
TEXT

16. Legacy Systems
-What

17. A system that is incapable of keeping
up with business requirements.

What is a
Legacy
System?

18. Symptoms
of Legacy
Systems
—Substantial Complexity

19. Symptoms
of Legacy
Systems
—Substantial Complexity
—Organizational Complexity

20. Symptoms
of Legacy
Systems
—Substantial Complexity
—Organizational Complexity
—Operational Complexity

21. Symptoms
of Legacy
Systems
—Substantial Complexity
—Organizational Complexity
—Operational Complexity
—Cognitive Complexity

22. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity

23. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity

24. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity

25. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity

26. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity
—Degraded Quality of Experience

27. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity
—Degraded Quality of Experience

28. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity
—Degraded Quality of Experience

29. Symptoms
of Legacy
Systems
—Substantial Complexity
—Decrease in Innovation Velocity
—Degraded Quality of Experience

30. Legacy Systems
-Why

31. Why legacy
systems
exist?

—Advancement in Technology

32. Why legacy
systems
exist?

—Advancement in Technology

33. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory

34. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory

35. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory

36. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory

37. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory
—Law of Architectural Entropy

38. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory
—Law of Architectural Entropy

39. Why legacy
systems
exist?

—Advancement in Technology
—Bit Rot Theory
—Law of Architectural Entropy

40. Do we
proactively
improve legacy
systems?

41. Big Ball of
Mud

42. Technical Renovation
-What

43. The act of upgrading or replacing
outdated systems and technology to
improve system health

What is
Technical
Renovation?

44. Where does
refactoring
fit in?

45. Refactoring

46. Technical
Renovation

47. Disclaimer: Refactoring is valuable!

48. Technical Renovation
-When

49. When is
Technical
Renovation
appropriate?

—Business driven renovation

50. When is
Technical
Renovation
appropriate?


—Business driven renovation

51. When is
Technical
Renovation
appropriate?


—Business driven renovation
—Ecosystem driven renovation

52. When is
Technical
Renovation
appropriate?


—Business driven renovation
—Ecosystem driven renovation

53. When is
Technical
Renovation
appropriate?


—Business driven renovation
—Ecosystem driven renovation
—Tech Debt driven renovation

54. When is
Technical
Renovation
appropriate?


—Business driven renovation
—Ecosystem driven renovation
—Tech Debt driven renovation

55. Takeaway 1 Legacy Systems are a
byproduct of success

Takeaway 2 Transform legacy systems
for long term success




Takeaway 3 Right tool for the problem:
renovate vs refactor

56. Technical Renovation
-Strategies

57. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast

58. Make it
work, Make it
right, Make it
fast


Make it work

59. Make it
work, Make it
right, Make it
fast


Make it right

60. Make it
work, Make it
right, Make it
fast


Make it fast

61. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast
—Evolutionary Architecture

62. 1.Identify Fitness Functions
Evolutionary
Architecture

63. 1.Identify Fitness Functions
Evolutionary
Architecture


Ref: Building Evolutionary Architecture, Neal Ford, Rebecca Parsons

64. 1.Identify Fitness Functions
2.Continuous Experimentation

Evolutionary
Architecture

65. 1.Identify Fitness Functions
2.Continuous Experimentation

Evolutionary
Architecture

66. 1.Identify Fitness Functions
2.Continuous Experimentation
3.Incrementation Changes

Evolutionary
Architecture

67. 1.Identify Fitness Functions
2.Continuous Experimentation
3.Incrementation Changes

Evolutionary
Architecture

68. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast
—Evolutionary Architecture
—Renovating while Innovating

69. Renovating
while
Innovating

70. Renovating
while
Innovating

71. Renovating
while
Innovating

72. Renovating
while
Innovating

73. Renovating
while
Innovating

74. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast
—Evolutionary Architecture
—Deprecation Driven Development

75. Deprecation
driven
development


What are we losing gaining by deprecating

76. Deprecation
driven
development

77. Deprecation
driven
development

78. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast
—Evolutionary Architecture
—Deprecation Driven Development
—Intentional Organization Design

79. Intentional
Organization
Design


Innovation = Discovery + Innovation

80. Intentional
Organization
Design


Conway’s Law: The structure of software
will mirror the structure of organization
that built it

81. Intentional
Organization
Design


Design A Design B

82. Intentional
Organization
Design

83. Strategies
for Technical
Renovation


—Make it work, Make it right, Make it fast
—Evolutionary Architecture
—Deprecation Driven Development
—Intentional Organization Design

84. NETFLIX
IMAGE
Growth Mindset

85. Takeaway 1 Legacy Systems are a
byproduct of success

Takeaway 2 Transform legacy systems
for long term success




Takeaway 3 Right tool for the problem:
renovate vs refactor



Takeaway 4 Renovate, Reorient, Repeat

86. Questions?