SGCIB - Un CTO paie toujours ses dettes

Transcript

2. "UN CTO PAIE TOUJOURS SES DETTES." A Story of a Technical Refactoring led the Lean way with Product Mangement ! : @HERVELOURDIN - HERVE@VIDEDRESSING.COM 2 — Leboncoin - Videdressing © - 2021
3. ▸ ex-CTO & Co-CEO chez Videdressing ▸ Engineering Director at Leboncoin since VD acquisition in 2018 ▸ Adepte et praticien Lean, Agiliste pragmatique ▸ Team Builder ▸ Ex Lean & Agile Partner chez @OCTOTechnology ▸ Co-founder of @Appal saStore 3 — Leboncoin - Videdressing © - 2021
4. SAY HI TO JÉRÔME ! SENIOR PRODUCT MANAGER AT VIDEDRESSING 4 — Leboncoin - Videdressing © - 2021
5. A CTO always pays his debts. — T. Lanister 5 — Leboncoin - Videdressing © - 2021
6. DISCLAMER: THIS TALK IS NOT A TROLL ABOUT TECH. DEBT However, I do reco end to read about tech. debt, accidental compexity & software entropy. 6 — Leboncoin - Videdressing © - 2021
7. 1 - WHO WE ARE? 7 — Leboncoin - Videdressing © - 2021
8. 8 — Leboncoin - Videdressing © - 2021
9. 9 — Leboncoin - Videdressing © - 2021
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 — Leboncoin - Videdressing © - 2021
11. 2 - WHY A REFACTORING PROJECT? 11 — Leboncoin - Videdressing © - 2021
12. A SIMPLE PLUG N' PLAY PROJECT ABOUT A NEW MEAN OF PAYMENT 12 — Leboncoin - Videdressing © - 2021
13. THE WAY WE LIKE TO SEE OUR PLATFORM 13 — Leboncoin - Videdressing © - 2021
14. THE WAY IT IS FOR REAL... 14 — Leboncoin - Videdressing © - 2021
15. ... BUT THE plug n' Play PROJECT ...TURNED OUT TO BE A COMPLETE FAILURE 15 — Leboncoin - Videdressing © - 2021
16. 16 — Leboncoin - Videdressing © - 2021
17. THE 4 HORSEMEN OF THE TECHNICAL APOCALYPSE 17 — Leboncoin - Videdressing © - 2021
18. (ABNORMAL) COMPLEXITY 18 — Leboncoin - Videdressing © - 2021
19. BUGS ... LOTS OF BUGS 19 — Leboncoin - Videdressing © - 2021
20. OBSOLETE PLATFORM 20 — Leboncoin - Videdressing © - 2021
21. HEROES (PROBABLY EXHAUSTED) 21 — Leboncoin - Videdressing © - 2021
22. 3 - HOW TO COMMUNICATE ABOUT A REFACTORING PROJECT? 22 — Leboncoin - Videdressing © - 2021
23. HOW TO TELL TO A BOARD OF INVESTORS? (AND EXPLAIN) 23 — Leboncoin - Videdressing © - 2021
24. HOW TO TELL ABOUT TECHNICAL DEBT? ▸ Show the effects (the 4 horsemen wi help) ▸ Calculate and communicate the financial impact ▸ Come with a plan ▸ Design a business oriented plan 24 — Leboncoin - Videdressing © - 2021
25. 4 - HOW TO PRIORITIZE SUCH PROJECT? 25 — Leboncoin - Videdressing © - 2021
26. ROADMAP IS Coming 26 — Leboncoin - Videdressing © - 2021
27. ▸ Trying to (re)understand how the machine is working 27 — Leboncoin - Videdressing © - 2021
28. DISTINGUISHING MYTHS FROM REALITY 28 — Leboncoin - Videdressing © - 2021
29. FAILED AT TRYING TO GET THE TRUTH FROM THE CODE 29 — Leboncoin - Videdressing © - 2021
30. (RE)-LEARN APPROACH ▸ Interviews ▸ Observation ▸ Technical Analysis 30 — Leboncoin - Videdressing © - 2021
31. SHARED VOCABULARY & ARCHITECTURE 31 — Leboncoin - Videdressing © - 2021
32. NEW ORDER MANAGEMENT SYSTEM 32 — Leboncoin - Videdressing © - 2021
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 — Leboncoin - Videdressing © - 2021
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 — Leboncoin - Videdressing © - 2021
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 — Leboncoin - Videdressing © - 2021
36. EXPLAIN EXECUTIVE TEAM & STAKEHOLDERS WE WILL NOT RELEASE BIG FEATURE FOR THE NEXT 9 MONTHS 36 — Leboncoin - Videdressing © - 2021
37. YES, ROADMAP IS Here 37 — Leboncoin - Videdressing © - 2021
38. THE IDEA: PROGRESSIVE REPLACEMENT OF MEANS OF PAYMENT (MOP) FROM THE OLD PLATFORM TO THE NEW ONE 38 — Leboncoin - Videdressing © - 2021
39. THE PLAN: DEPENDING ON THE BUSINESS IMPACT AND THE POTENTIAL RISK, WE PRIORITIZED THE MOP DEPLOYMENT BY PLATFORM 39 — Leboncoin - Videdressing © - 2021
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 — Leboncoin - Videdressing © - 2021
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42. THINK ABOUT FEATURE FLIPPING & “FEATURE CAPPING” AT THE BEGINNING OF THE PROJECT 42 — Leboncoin - Videdressing © - 2021
43. 5 - MEANWHILE WITH THE TECH & PRODUCT TEAM 43 — Leboncoin - Videdressing © - 2021
44. SHOW YOUR NUMBERS 44 — Leboncoin - Videdressing © - 2021
45. CODE REVIEW, CODE REVIEW, NEVER SKIP CODE REVIEW 45 — Leboncoin - Videdressing © - 2021
46. DEVOPS SUPPORT REQUIRED ▸ Fully Dockerized dev. environment ▸ Fresh dataset automation ▸ Keep syncing with master branch whenever you can ▸ Deploy on a testable feature branch ▸ Release ASAP & often 46 — Leboncoin - Videdressing © - 2021
47. THE LEGACY ROOMATE ▸ Do not f d 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 47 — Leboncoin - Videdressing © - 2021
48. 6 - RESULTS & LEARNINGS 48 — Leboncoin - Videdressing © - 2021
49. RESULTS ▸ 100% of orders are now processed on the new system ▸ bug (almost) free ▸ easy to track/reconciliate ▸ -20% on Customer Care contact rate 49 — Leboncoin - Videdressing © - 2021
50. 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 50 — Leboncoin - Videdressing © - 2021
51. 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 51 — Leboncoin - Videdressing © - 2021
52. 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 52 — Leboncoin - Videdressing © - 2021
53. Merci ! 53 — Leboncoin - Videdressing © - 2021
54. Q&A 54 — Leboncoin - Videdressing © - 2021
55. HERVÉ LOURDIN - @HERVELOURDIN FOLLOW US AT @VD_LABS SAY HELLO! AT: HELLO@VIDEDRESSING.COM 55 — Leboncoin - Videdressing © - 2021
56. APPENDIX 56 — Leboncoin - Videdressing © - 2021
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