Overview The 19th Theoretical Aspects of Software Engineering Conference (TASE 2025) will be held in Limassol, Cyprus, on July 14-16, 2025. TASE 2025 aims to bring together researchers and developers from academia and industry with interest in the theoretical aspects of software engineering. Modern society is increasingly dependent on software systems that are becoming larger and more complex. This poses new challenges to current software engineering methodologies that need to be enhanced using modern results from theoretical computer science. We invite submission of research papers on topics covering all theoretical aspects of software engineering, including those describing applications of theoretical computer science in industrial applications and software engineering methodologies. Topics of Interest Authors are invited to submit high quality technical papers describing original and unpublished work in all theoretical aspects of software engineering. Topics of interest include, but are not limited to: Software engineering, including: ■ Software processes and workflows ■ Software architectures and design ■ Software product lines ■ Requirements engineering ■ Model-driven software engineering ■ Software testing and quality assurance ■ Software safety, security and reliability ■ Reverse engineering and software maintenance ■ Component-based software engineering ■ Feature-oriented programming ■ Program synthesis ■ Use of AI and large language models in software engineering Formal methods and theoretical computer science, including: ■ Deductive verification ■ Model checking ■ Theorem proving, decision procedures, SAT and SMT ■ Specification languages ■ Program logics and calculi ■ Formal languages and automata theory ■ Run-time verification and monitoring ■ Integration of formal methods ■ Formal methods for AI systems, and vice versa Programming language design and technology, including: ■ Formal semantics ■ Abstract interpretation and program analysis ■ Language paradigms, including object-oriented, functional, declarative, etc. ■ Type systems and behavioral typing ■ Compiler design ■ Domain-specific languages Tools and application areas, including: ■ Software tools putting theory into practice ■ Cyber-physical, embedded, and real-time systems ■ Distributed and concurrent systems ■ Semantic web and web services ■ Service-oriented programming and cloud computing ■ Quantum circuits and programs ■ Cryptographic algorithms