How Banks Implement Feature Flags - Interview with KB Bank | Flagsmith

Jindrich Kubat, Head of Development & COE at Komerční Banka, discusses the bank's ongoing transformation project, which involves replacing its legacy infrastructure with a modern "Digital Hub" built on microservices and adopting agile and DevOps practices. The initiative, referred to as "The New Digital Bank," is a multi-year project that aims to modernize the bank's systems and culture, incorporating feature flags, OKRs, and the Spotify model for functional teams. The transition includes a focus on open-source technologies like Kafka and ElasticSearch, with a rigorous unification of development practices via the KB Speed framework. The bank has been using feature flags in non-production environments for a year and recently implemented them in production, overcoming security challenges. The feature flags are initially used on the front-end, enabling more agile deployment practices, and there are plans to extend their use to backend systems. The bank is also exploring further integration of feature flag systems with tools like JIRA to enhance coordination between QA teams and product owners.

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