Working in close collaboration with the GEMM project, the D-Lab has developed a unique software, SAdIE (Advanced Scraping and Implementation Engine). SAdIE allows us to identify suitable online vacancies, randomize the treatments, and automatize key steps of the application process, thus greatly reducing implementation costs. Our software builds on a randomization code originally developed by our colleagues at WZB and later updated by the ICT programmers at University of Utrecht. To this code, we added new scraping and implementation tools adapted for online field-experimentation. The goat provides the software infrastructure of the D-Lab for field-experimental research in the Spanish labour market. To protect our software from the risk of cyberattacks, we apply the strictest security protocols.