His research in EU law focuses on the litigation and procedural aspects of the Court of Justice of the European Union (CJEU). His doctoral thesis provides an in-depth procedural analysis of strategic litigation before the CJEU, examining how the Court adjudicates these cases by applying its rules. The thesis identifies inconsistencies and loopholes that undermine the Court’s legitimacy and the right to effective judicial protection, with a particular emphasis on strategic litigation in EU data protection and digital law.
In addition to his PhD work, Walter examines the institutional and legal framework of the CJEU, exploring its evolution and reforms. He also delves into EU judicial remedies and EU climate litigation. Furthermore, Walter teaches a course in EU constitutional law as part of the Bachelor in Law program.