From monolith tinkering to modern software development - describes a journey of improving the work on a monolithic application, discusses typical anti-patterns and traps in software delivery and system design and shows ways to resolve the same. It shows how to measure the success of measures taken by using the DevOps research KPIs (availability, mean time to repair, change fail rate, deployment frequency, and lead time). The talk wants to give ideas for answers to questions like: How can I increase the deployment frequency? How can I reduce waste in the process of software delivery? How can I speed up the software delivery?