Taking control of the stack : scalability, optimization. We managed to handle all the traffic from Leconcoin with just one single server!
Reorganization, management, and supervision of the technical team : 10 people, 2 teams, SCRUM, ceremonies, JIRA, sprint demo (Admo went from 10 to 50 employees)
Implementation of best practives: CI, Unit Tests backend (phpunit), Unit Tests frontend (cypress), documentation, code review
Implementation of monitoring: Icinga, Grafana, ELK