Create and maintain features in Web including integration scripts applications and be able to develop unit tests for the same features. Responsible to investigating problems in applications in collaboration with support teams, backend teams and merchant teams. Propose and do refactors. Estimate efforts for tasks with a high level of accuracy. Analyze large volumes of data to find possible problems and propose performance improvements. Identify performance issues and propose solutions. Participate in technical meetings and propose solutions to problems. Create alarms in metrics systems used by the company. Indicate new tools and technologies. Support new developers on company and train them on the development process, patterns and features. Participate in functional meetings with non-engineering teams with knowledge about all front end features and with skills to propose solutions. Document features in the available tool. Creation of integrated tests in the tool provided. In refinement meetings, analyze all proposals and be able to define the best solution. Be able to participate in war rooms and create an action plan.