The Design for Justice Lab (DJL) is a joint initiative between lawyers, designers, and engineers that integrates design thinking and system dynamics to expand knowledge on access to justice. The Lab is based on five elements (i) Real problem approach. We address real and concrete issues related to access to justice. We work directly with institutions and stakeholders to identify a problem; (ii) a human-centered design approach. We seek to implement a solution based on a Design Thinking methodology that puts people's experiences at the center. In doing so, we seek bottom-up solutions that can be easily replicated as we consider our interventions' cultural and economic constraints; (iii) systems thinking approach. We strive to implement the proposals within their ecosystem and context. The proposals are based on systems thinking to understand the interactions of system actors and contemplate the possible implications they could have at the system level. (iv) An empirical approach. Qualitative data is a crucial component for us. We spend a lot of time observing, analyzing, ideating, experimenting, validating, and iterating, so the users' perspective is a critical element of our learning experience. We learn through failure, and reflecting on it is essential to refining improvements; and (v) interdisciplinary approach. We promote a real conversation between the disciplines of law, design, and engineering.