This book constitutes the refereed proceedings of the 12th European Conference on Software Architecture, ECSA 2018, held in Madrid, Spain, in September 2018. The 17 full papers presented together with 7 short papers were carefully reviewed and selected from 96 submissions. They are organized in topical sections as follows: Self-Adaptive Architectures, IoT Architectures, Embedded and Cyber-Physical Systems, Microservices Architectures, Service-Oriented Architectures, Architectural Design Decisions, Software Architecture in Practice.

Adam a 22 year old, in a completely loveless relationship with an extremely abusive partner is about to have his whole reality altered when he meets a woman he falls in love with. Adam fully knowing the extent of the insanity of his partner decides to lay low. Only to realize fate has completely other plans for the course of his life. Adam discovers hidden secrets about himself, and the secrets others have hidden from him. Adam is extremely impacted by Alchemy's presence in his life. She is the something from his past, he thought he would never encounter again. Alchemy and Adam's life is about to change completely. In ways no one ever could have foreseen. Adam's love for Alchemy takes him to the darkest shadows of himself, and leads him through a spiritual journey. Adam's perspective is completely changed.