Abstract
It is a common occurrence to see applications thrown over the fence, landing somewhere in production without a second thought about their lifecycle or how they may need maintaining in the future to connect to more efficient API endpoints. Some of these applications are quickly thrown up to provide a temporary solution, but we all know that there is nothing more permanent than temporary. But day two, we may need to enable encryption, modify their API calls/behaviours, and understand and observe what these applications are doing.
In this talk we will utilise the power of Open Source, eBPF and some of the powers of Kubernetes, to demonstrate that we can now add features to existing application behaviour both *live* and without making any changes to the application itself. From transparently adding encryption to an existing application without breaking its traffic patterns, to changing an AI application by live changing prompts or models providing safety or efficiency in application behaviour and finally providing understanding into what these applications are doing.
Topics
QCon London 2026 is a three day conference for senior software engineers, architects and team leads. An international program committee of working engineers selects every session. Patterns and practices, not products and pitches.
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