High-Throughput Sanctions Screening Using Event-Driven Micro-services in Financial Institutions

Abstract

In today's complex global financial environment, cross-border transactions, and constantly changing sanctions lists, compliance with sanctions screening has emerged as one of the most important compliance tasks for financial institutions. Third parties (including regulatory agencies like the OFAC, FATF and EU) have very strict requirements regarding screening of customers, payments and transactions against sanctioned entities, as well as PEP and restricted party lists. Traditional architectures for sanctions screening are generally monolithic and process batches of data, which can become cumbersome and inefficient as they scale up, have elevated latency, low resilience to failures, and inadequate ability to adjust to regulatory updates. These constraints are particularly significant in high-volume banking environments, both with regard to transaction throughput and efficiency of compliance. In this paper we propose an event-driven micro-services approach for high throughput financial institutions' sanctions screening. The suggested architecture splits up sanctions screening into independent scalable services that are connected by event-streaming infrastructure. Core services are transaction ingestion, sanctions list synchronization, fuzzy matching, risk scoring, decision orchestration and alert management. The architecture is designed to provide high throughput, low latency, and fault tolerance for real-time screening, thanks to the use of asynchronous messaging, distributed processing, and dynamic scaling. It covers the basic elements of architecture such as message brokers, stream processing pipelines, distributed databases and intelligent matching engines. The screening pipeline utilizes advanced matching techniques, including Levenshtein distance, phonetic, token-based and machine learning–assisted ranking, to enhance the accuracy of screening and minimize false-positive results. The event-driven model allows for seamless horizontal scaling, independent deployment, and resilience when transaction loads are high. Experimental results show significant screening effectiveness improvements. The proposed system not only reduces the transaction screening latency but also boosts processing throughput and enhances the screening accuracy with fewer false-positive alerts generated than conventional monolithic systems do. The findings show that event driven micro-services architectures are scalable and resilient solution for regulatory compliance in modern Banking system. The study advances the field of financial technology architecture by introducing a scalable and compliance-oriented sanctions screening system that can be adopted in today's digital banking landscape. The results show that in financial institutions, the implementation of event-driven micro-services has a significant impact on operational efficiency, risk mitigation and the responsiveness to compliance.