Activities: I worked on the legacy code of one of the platforms called Bytestand. That consisted in adding a few features and fixing major bugs. I re-engineered the frontend for another platform called FreshCredit. The frontend was done with VueJS framework.
Mistakes: I failed at working with none-agile environments.

Activities: I added a couple of features: basically the customizable forms where users can create their own forms with as many different DOM elements among other stuff.
Mistakes: Apparently none.

Activities: I worked with development teams to increase their productivity. I was in charge of PR reviews. I worked as a technical consultant for new projects. I created a few platforms with Rails, Sidekiq, Redis with third-party services such as Twilio, Sendgrid, Realstate APIs, Google APIs, and IBM Watson APIs. All this under the infrastructure of Docker (Swarm) on AWS.
Mistakes: I failed in delivering features on time. I failed in trying to manage too many projects. I failed in giving feedback to work collegues.