AutoScout24 is a pan-European vehicle marketplace with 10 million users. We are currently turning our IT inside out: from Windows and .NET to Linux and the JVM, from our own data centers to Amazon Web Services, from a monolithic architecture to microservices and from separate development and operations departments to "Your build it - you run it" teams. On the way, we are rebuilding the better part of our platform from scratch. Are we out of our minds? Are our employees running away screaming? What strategic decisions have motivated us? How do we keep up operation and product development? What is our approach and what have we learned so far?

1. WebTech Conference | 26/10/2015 | Simon Hohenadl
The AutoScout24 Technology Change
Crazy or Trendsetting?

2. Simon Hohenadl
Head of Customer IT
shohenadl@autoscout24.com
@SimonHoh

5. 2 Million Vehicles

6. 100 in IT

7. 3.250.000.000
Page Impressions per Month

8. 2000 Servers
2 Data Centers

9. One Release
a Month

10. Collaboration

11. Continuous
Delivery

13. You build it,
you run it.

14. New
CEO

15. Talent?
Do you attract

17. Don‘t reinvent
the Wheel

18. Giants
Stand on the
Shoulders of

19. Amazon
Web Services

20. Tatsu

22. It’s not about
the language

23. Rebuild it all

24. … while running

27. Target Architecture
Monolith Alarm!
Nanoservices? Composition?

28. Micro-
Macro-
Architecture

29. 100 %
0 %
Time
Engineers on old stack
Engineers on new stack
Proficiency on new stack
Products on new stack
Products on old stack

31. 0
10
20
30
40
50
60
70
80
90
Sep-14 Dec-14 Apr-15 Jul-15 Oct-15 Jan-16 May-16 Aug-16
AutoScout24 Staff
Consultants
Ramping up Engineers

32. 0
10
20
30
40
50
60
70
80
90
AutoScout24 Staff
Consultants
But plans change

33. 0
10
20
30
40
50
60
70
80
90
AutoScout24 Staff
Consultants
… and change

37. We are all
engineers!

39. Value

40. Why AWS?

41. Blocker?

42. Fast
Feedback
SQS + S3
Kinesis + S3
Kinesis + DynamoDB
SQS + DynamoDB
Proxy + DynamoDB
DynamoDB

43. Magic
Moment

44. Crazy?

45. Picture Credits
• Slide 5: "HotWheels - '69 Ford Torino Talladega“ by Leap Kye, licensed under CC BY-ND 2.0
• Slide 10: "The Great Wall of China at Jinshanling“ by Severin.stalder, licensed under CC BY-SA 3.0
• Slide 16: "Amazon rainforest“ by Neil Palmer, licensed under CC BY-SA 2.0
• Slide 17: „Reinventing the wheel“ by Thomas Guest, licensed under CC BY 2.0
• Slide 21: "Carousel2diamondjubileeNB“ by Wikieditor243, licensed under CC BY-SA 3.0
• Slide 40: "Amazon Rainforest, Venezuela“ by Eric Pheterson, licensed under CC BY 2.0
• Slide 44: "justin-jackson-crazy-mijustin-canada« by Justin Jackson, licensed under CC BY 2.0
Simon Hohenadl
shohenadl@autoscout24.com
@SimonHoh
… and yes, we are hiring.