A CTO Always pays his debts - Devoxx France 2018

Presentation about technical debt at www.videdressing.com and how we prioritized our tech refactoring project jointly with product management team using business criteria.
Presentation held at Paris for the "Devoxx France" 2018 conference.

Transcript

1. "UN CTO PAIE TOUJOURS SES DETTES." A Story of a Technical Refactoring led the Lean way with Product Mangement ! : @HERVELOURDIN - HERVE@VIDEDRESSING.COM
2. ▸ CTO & Co-CEO chez Videdressing ▸ Adepte et praticien Lean, Agiliste pragmatique ▸ Team Builder ▸ Ex Lean & Agile Partner chez @OCTOTechnology ▸ Co-founder of @AppaloosaStore 2 — Devoxx - Videdressing © - 2018
3. SAY HI TO JÉRÔME ! SENIOR PRODUCT MANAGER AT VIDEDRESSING 3 — Devoxx - Videdressing © - 2018
4. A Product Manager always pays his debts. — T. Lanister 4 — Devoxx - Videdressing © - 2018
5. A Product Manager CTO always pays his debts. — T. Lanister 5 — Devoxx - Videdressing © - 2018
6. DISCLAMER: THIS TALK IS NOT A TROLL ABOUT TECH. DEBT However, I do recommend to read about tech. debt, accidental compexity & software entropy. 6 — Devoxx - Videdressing © - 2018
7. 1 - WHO WE ARE? 7 — Devoxx - Videdressing © - 2018
8. 8 — Devoxx - Videdressing © - 2018
9. 9 — Devoxx - Videdressing © - 2018
10. LEAN / AGILE ORGANIZATION ▸ Product & Tech teams working on the same floor, 1 common spirit ▸ cross-functional team: PO, front & back developers, Designers ▸ iterative & incremental development: test fast, learn fast, improve ▸ 2 weeks scrumban iterations ▸ Release on the flow ▸ Stakeholders are integrated into projects 10 — Devoxx - Videdressing © - 2018
11. 2 - WHY A REFACTORING PROJECT? 11 — Devoxx - Videdressing © - 2018
12. A SIMPLE PLUG N' PLAY PROJECT ABOUT A NEW MEAN OF PAYMENT 12 — Devoxx - Videdressing © - 2018
13. THE WAY WE LIKE TO SEE OUR PLATFORM 13 — Devoxx - Videdressing © - 2018
14. THE WAY IT IS FOR REAL... 14 — Devoxx - Videdressing © - 2018
15. ... BUT THE plug n' Play PROJECT ...TURNED OUT TO BE A COMPLETE FAILURE 15 — Devoxx - Videdressing © - 2018
16. 16 — Devoxx - Videdressing © - 2018
17. THE 4 HORSEMEN OF THE TECHNICAL APOCALYPSE 17 — Devoxx - Videdressing © - 2018
18. (ABNORMAL) COMPLEXITY 18 — Devoxx - Videdressing © - 2018
19. BUGS ... LOTS OF BUGS 19 — Devoxx - Videdressing © - 2018
20. OBSOLETE PLATFORM 20 — Devoxx - Videdressing © - 2018
21. HEROES (PROBABLY EXHAUSTED) 21 — Devoxx - Videdressing © - 2018
22. 3 - HOW TO COMMUNICATE ABOUT A REFACTORING PROJECT? 22 — Devoxx - Videdressing © - 2018
23. HOW TO TELL TO A BOARD OF INVESTORS? (AND EXPLAIN) 23 — Devoxx - Videdressing © - 2018
24. HOW TO TELL ABOUT TECHNICAL DEBT? ▸ Show the effects (the 4 horsemen will help) ▸ Calculate and communicate the financial impact ▸ Come with a plan ▸ Design a business oriented plan 24 — Devoxx - Videdressing © - 2018
25. 4 - HOW TO PRIORITIZE SUCH PROJECT? 25 — Devoxx - Videdressing © - 2018
26. ROADMAP IS Coming 26 — Devoxx - Videdressing © - 2018
27. ▸ Trying to (re)understand how the machine is working 27 — Devoxx - Videdressing © - 2018
28. DISTINGUISHING MYTHS FROM REALITY 28 — Devoxx - Videdressing © - 2018
29. FAILED AT TRYING TO GET THE TRUTH FROM THE CODE 29 — Devoxx - Videdressing © - 2018
30. (RE)-LEARN APPROACH ▸ Interviews ▸ Observation ▸ Technical Analysis 30 — Devoxx - Videdressing © - 2018
31. SHARED VOCABULARY & ARCHITECTURE 31 — Devoxx - Videdressing © - 2018
32. NEW ORDER MANAGEMENT SYSTEM 32 — Devoxx - Videdressing © - 2018
33. THIS PROCESS MAP WAS THE real first “release” OF THE PROJECT ... AND KILL SOME GOOD OLD MYTHS ABOUT HOW IT WAS MEANT TO WORK 33 — Devoxx - Videdressing © - 2018
34. ANALYSIS CONCLUSIONS Payment & Order system is our spine. Having a seamless customer experience from online to offline is a physiological need. We must address it in priority. AtoZ rebuild of our payment system & order lifecycle 34 — Devoxx - Videdressing © - 2018
35. THE HARD DECISIONS ▸ Stop or postpone other projects ▸ Dedicated TaskForce for next 9 months ▸ No bug fixes on legacy anymore ▸ Accept to decrease the quality of service to improve it afterwards 35 — Devoxx - Videdressing © - 2018
36. EXPLAIN EXECUTIVE TEAM & STAKEHOLDERS WE WILL NOT RELEASE BIG FEATURE FOR THE NEXT 9 MONTHS 36 — Devoxx - Videdressing © - 2018
37. YES, ROADMAP IS Here 37 — Devoxx - Videdressing © - 2018
38. THE IDEA: PROGRESSIVE REPLACEMENT OF MEANS OF PAYMENT (MOP) FROM THE OLD PLATFORM TO THE NEW ONE 38 — Devoxx - Videdressing © - 2018
39. THE PLAN: DEPENDING ON THE BUSINESS IMPACT AND THE POTENTIAL RISK, WE PRIORITIZED THE MOP DEPLOYMENT BY PLATFORM 39 — Devoxx - Videdressing © - 2018
40. RELEASE THE LEAN WAY ▸ Slice for the fastest way in production ▸ Mitigate risks with Feature Toggles ▸ ... and Rollback ▸ Do not create all the tools day one (simple spreadsheet is ok) 40 — Devoxx - Videdressing © - 2018
41. 41 — Devoxx - Videdressing © - 2018
42. THINK ABOUT FEATURE FLIPPING & “FEATURE CAPPING” AT THE BEGINNING OF THE PROJECT 42 — Devoxx - Videdressing © - 2018
43. 43 — Devoxx - Videdressing © - 2018
44. 5 - MEANWHILE WITH THE TECH & PRODUCT TEAM 44 — Devoxx - Videdressing © - 2018
45. SHOW YOUR NUMBERS 45 — Devoxx - Videdressing © - 2018
46. CODE REVIEW, CODE REVIEW, NEVER SKIP CODE REVIEW 46 — Devoxx - Videdressing © - 2018
47. DEVOPS SUPPORT ▸ Fully Dockerized dev environment ▸ Fresh dataset automation ▸ Keep syncing with master branch whenever you can ▸ Deploy on a testable feature branch 47 — Devoxx - Videdressing © - 2018
48. THE LEGACY ROOMATE ▸ Do not feed the monster ▸ Starve the monster whenever it's possible ▸ Separate bundles in the new platform ▸ Make the new services more desireable than the easy (dark) one 48 — Devoxx - Videdressing © - 2018
49. 6 - RESULTS & LEARNINGS 49 — Devoxx - Videdressing © - 2018
50. RESULTS ▸ 99,9% of orders are now processed on the new system ▸ bug (almost) free ▸ easy to track/reconciliate ▸ -20% on Customer Care contact rate 50 — Devoxx - Videdressing © - 2018
51. RESULTS ▸ Enabler for Mobile platforms better performance ▸ From 40% to 55% of mobile contribution in sales ▸ The user/order lifecyle is now readable, not only by developers 51 — Devoxx - Videdressing © - 2018
52. MISTAKES ▸ Postponing information to board/exec team on platform state ▸ Took too much time to decide the refactoring ▸ Spent too much energy to solve bugs instead rebuilding ▸ No unified & shared documentation on business process ▸ Stakeholders not enough involved & informed once the project was launched 52 — Devoxx - Videdressing © - 2018
53. OTHER LEARNINGS ▸ The monster will not die before long ▸ But you can "contain" it ▸ Mob(ish) programming is cool for tricky design phase ▸ Never skip code reviews 53 — Devoxx - Videdressing © - 2018
54. Merci ! 54 — Devoxx - Videdressing © - 2018
55. Q&A ( AU CAFÉ ;-) ) 55 — Devoxx - Videdressing © - 2018
56. HERVÉ LOURDIN - @HERVELOURDIN FOLLOW US AT @VD_LABS SAY HELLO! AT: HELLO@VIDEDRESSING.COM 56 — Devoxx - Videdressing © - 2018
57. APPENDIX 57 — Devoxx - Videdressing © - 2018
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