This book constitutes selected and enlarged versions of papers presented at S3E 2024 Topical Area, held as part of FedCSIS 2024, in Belgrade, Serbia, 8-11 September, 2024 and the 25th Conference on Practical Aspects of and Solutions for Software Engineering, KKIO 2024, held as part of SEAA 2024, Paris, France, during August 28-30, 2024. The 3 papers included from KKIO 2024 were selected from 18 submissions (and 10 presentations), and the 5 papers from S3E were selected from 25 submissions (and 12 presentations). The contributions deal with academic research and real-world applications in the field of software engineering.