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# Next Level Enterprise Architecture: Modular, Flexible, Scalable, Multichannel and AI-Ready?

How do you modernize legacy banking for 50 million clients without triggering a system collapse? Discover how Finanz Informatik empowers 1,700 engineers with modular architecture and exceptional developer experience.

- **Speakers:** [Linda](https://www.wearedevelopers.com/@linda), [Maik](https://www.wearedevelopers.com/@maik)
- **Event:** World Congress 2024
- **Published:** August 20, 2024
- **Duration:** 21:19
- **URL:** https://www.wearedevelopers.com/videos/1017-next-level-enterprise-architecture-modular-flexible-scalable-multichannel-and-ai-ready

## Summary

Finanz Informatik, the IT provider for the massive Sparkassen-Finanzgruppe, faces the daunting challenge of servicing 50 million clients while modernizing decades of legacy banking infrastructure. Recognizing that a "big bang" migration would trigger a chaotic system collapse, the organization is adopting a modular, multi-channel architecture powered by Spring Boot and Spring Cloud. This approach effectively builds the transformation process into the application layers, enabling backward integration with traditional mainframe systems while innovating forward to embrace emerging technologies like generative AI and an exploding variety of front-end channels.

To steer this massive organizational "oil tanker" toward modern delivery, the architecture team places heavy emphasis on Developer Experience (DX) for its 1,700 software engineers. Leveraging a custom developer portal built on Spotify's Backstage, they systematically remove bureaucratic administrative burdens by offering tools like an initializer that provisions full CI/CD environments in minutes. Embracing open-source principles, the organization also instituted an "inner source" policy and community hub, breaking down traditional silos and allowing developers to freely build, share, and collaborate on platform plugins.

Successful enterprise IT transformation ultimately requires co-creation rather than top-down mandates. By organizing bottom-up hackathons and using specific pilot projects as strategic multipliers, the architecture team captures vital hands-on feedback early. Their guiding principle is to "reach out before you roll out," ensuring developers actively shape the technology roadmap rather than just executing it. By prioritizing developer productivity and community, the engineering organization creates a cascading benefit: engineers spend more time coding, customers receive faster digital solutions, and the enterprise operates with significantly greater resource efficiency.

**Keywords:** enterprise architecture modernization, legacy banking infrastructure, multichannel system architecture, developer experience optimization, spotify backstage implementation, spring boot middleware, spring cloud integration, internal developer portal, CI/CD automation deployment, inner source software policy, hackathon technology adoption, large scale software migration, backward compatibility integration, financial services community cloud, technology roadmap co-creation, organizational silo reduction

## Chapters

1. **Scaling IT operations for a major finance cloud** (00:26) — Managing the digitalization of a massive banking group requires supporting millions of users and constant transactions.
1. **Integrating new technology while maintaining legacy banking systems** (02:42) — Balancing new consumer expectations like mobile banking requires a cloud foundation that supports both innovation and legacy mainframes.
1. **Building a flexible multichannel banking software architecture** (06:05) — Implementing standardization and modularity with spring boot enables applications to seamlessly support diverse interfaces and front-end technologies.
1. **Avoiding chaotic big bang software architecture migrations** (08:25) — Utilizing an integration architecture focused on interoperability and backward compatibility ensures a steady transformation without disrupting active channels.
1. **Guiding large developer teams through architectural transformations** (10:41) — Shifting thousands of developers toward new workflows requires graduated pilot projects and continuous communication tightly linked to daily work.
1. **Cultivating developer happiness to improve software team productivity** (13:30) — Removing bureaucratic inefficiencies and involving engineers in roadmap creation are essential elements for a thriving engineering culture.
1. **Securing management budget for developer experience improvements** (16:54) — Framing developer platforms as drivers for faster delivery creates a compelling business case for executive leadership.
1. **Implementing developer platforms and inner-source hackathons** (17:53) — Deploying customized engineering portals and running participant-led hands-on events accelerates the adoption of scalable deployment workflows.
1. **Strategizing pilot projects for steady architectural adoption** (19:49) — Using pilot initiatives as multipliers and prioritizing early developer feedback drives successful and sustainable architectural rollouts.

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