Building Digital Banking Foundations: Delivering End-to-End FinTech Solutions with Enterprise-Grade Reliability

Sirisha Meka

doi:10.15662/IJRAI.2023.0602003

Authors

Sirisha Meka Engineering Manager, Credit Karma, USA Author

DOI:

https://doi.org/10.15662/IJRAI.2023.0602003

Keywords:

Digital Banking Systems, Full-Stack FinTech Development, Agile SDLC & CI/CD Automation, Java–Spring and Angular Architecture, Cloud-Native Deployment, Enterprise Reliability & Workflow Automation

Abstract

In this paper, the design, development, and operationalization of an enterprise-scale digital banking backbone of community banks are introduced, which is developed as an end-to-end FinTech ecosystem. The aim was to provide full-stack digital banking apps with high reliability, security, and performance but at the same time retain its current production systems. The project was developed as a Software Development Life Cycle (SDLC) that included analysis, architecture, agile planning, development, testing, deployment, and production support. The stack technology comprised of Angular, Java, Spring, SQL Server, Jenkins, NodeJS, Flowable, GitHub and AWS cloud services. The initiative was methodologically based on Scrum-oriented Agile delivery that was backed by a CI/CD automation system and thorough code review, architectural documentation, and constant stakeholder cooperation. The implementation of new capabilities occurred based on microservices-style REST APIs, modular frontends, and reactional data models, which are optimized on the concept of transactional integrity. In line with the new development, the current banking platforms were streamlined with JIRA-based triage, priority-based defect fixes, and never-ending enhancements that were tested with Proof-of-Concepts (POCs). The quantitative data show significant improvements in the productivity and operation stability. Monthly cases of production incidents reduced by 39.6 percent (to 29) and the Mean Time to Resolve (MTTR) was reduced by 47.2 percent (to 9.5 hours). Performance engineering also saw an improvement in the form of sprint velocity, which shot up to 150 story points (an improvement of 76 percent) and story completion, which went up to 91 percent. The number of defects of high severity reduced by 47.6 per cent, and the availability of the system increased to 99.4 per cent (in place of the 98.1 per cent). In general, the project provided a highly resilient, secure, and reliable digital banking base that can be expanded to meet the changing FinTech needs as well as a high degree of operational stability and predictability.

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