OYAK ANKER Bank and Mambu: reimagining banking for the digital age


The 67-year-old German bank accelerated its modernisation journey by migrating its core banking operations to Mambu, creating a more agile, efficient, and future-ready operating model.
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uptime during migration to Mambu
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acceleration in time-to-market for new products
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of manual operations automated
OYAK ANKER Bank GmbH

About the customer
OYAK ANKER Bank GmbH is a German commercial bank based in Frankfurt, with a strong presence in retail and corporate banking. Founded in 1958 as Allgemeine Teilzahlungsbank (ATB) and later rebranded in 1996 after being acquired by the Turkish pension fund OYAK, the bank now operates exclusively in the digital space, with no physical branches.

The bank offers a range of products, including savings accounts, fixed-term deposits, personal loans, and specialised services like trade finance, corporate banking, and treasury management, focusing particularly on cross-border financing between Europe and Turkey.

With total assets of approximately €1.75 billion, OYAK ANKER Bank is supported by the extensive network and financial backing of OYAK, one of Turkey's largest conglomerates.
The challenge

Modernising an established German bank

As a long-established bank with decades of history, OYAK ANKER Bank had reached the limits of its existing core banking system.

The core had become rigid, slow to adapt, and costly to maintain, making it increasingly difficult to keep pace with the evolving customer expectations, regulatory requirements, and a rapidly changing baking landscape.

The bank recognised that moving from its ageing core with another conventional, monolithic banking platform would simply exchange on limitation for another. Instead, it sought a modern cloud-native core banking solution that would accelerate product development, streamline customer interactions, and provide the flexibility, scalability, and speed needed for future growth.

"Modernising long-established banking infrastructure means confronting decades of complexity and organisational inertia. We chose to start from a blank page and people only believed it when they saw the entire ecosystem working."

– Dr Süleyman Erol, Managing Director, at OYAK ANKER Bank