Mentoring and helping other developers on features (peer-programming, advices, discussions, code reviews...) and setup some workflows / automation (github actions, storybook...)

Writing technical specs

Features development

Working with Docker, RabbitMQ, Symfony, ReactJS / Relay Modern and GraphQL
Optimizing the application by using New Relic or some patterns like the DataLoader pattern with GraphQL.
Redone the mailing system in an asynchronous way with RabbitMQ.
Making features for the frontend or adding new queries / mutations for the GraphQL API
Writing unit and integration tests.
Making of some small libraries to write Behat tests for RabbitMQ
Writing of some articles and done some talks (about React Suspense)