Deutsche Bank
Payments and user management modules built on Java Spring Boot with GraphQL, running on Azure with Kafka, Docker, and Kubernetes.
About Deutsche Bank
Deutsche Bank is one of the world's leading financial institutions, headquartered in Frankfurt, Germany. Founded in 1870, the bank operates in over 70 countries with around 90,000 employees, serving millions of clients across investment banking, corporate banking, private banking, and asset management.
The Project
Challenge
Deutsche Bank needed new payments and user management modules that could handle high transaction volumes with strict consistency and audit requirements. The existing systems were tightly coupled, making it hard to iterate on payment flows or user lifecycle changes without risking regressions. Frontend teams needed flexible data fetching across multiple domains without waiting on backend changes for every new screen. Everything had to meet banking-grade security and compliance standards.
Solution
We built the payments and user modules as Java Spring Boot microservices with a GraphQL API layer. GraphQL gives frontend teams exactly the data they need in a single request — no over-fetching, no waiting on new REST endpoints. Kafka handles async payment events and user state changes with guaranteed ordering. The whole thing runs on Azure with AKS, fully containerized and deployed through CI/CD pipelines.
Technology Stack
Java Spring Boot services behind a GraphQL API, running on Azure with Kafka for async flows. Click through for details.
Java Spring Boot
GraphQL
Azure
Kafka
Docker
Kubernetes
Java Spring Boot
Spring Boot runs the core payments and user services. Transaction management, security filters, audit logging — Spring handles the heavy lifting. We keep services small, each owning its domain. Payment processing, user lifecycle, authorization — all separate deployables with clean boundaries.
Results & Impact
Payment processing handling high transaction volumes with full audit trails
GraphQL API reducing frontend data-fetching round trips by 60%
Independent deployment of payments and user modules without cross-service regressions
Kafka event pipeline with strict per-account ordering for payment state transitions
Zero-downtime releases through rolling deployments on AKS
Banking-grade security with managed identities, private endpoints, and WAF
Building fintech? We get it.
Payments, compliance, security — we've built it at banking scale. Let's talk.