How a financial institution cut time-to-market by 70% by retiring its monolith

For established financial institutions, legacy systems are often the greatest barrier to innovation. Monolithic architectures created decades ago cannot support the speed of modern FinTech, leading to delayed product launches and security vulnerabilities.

The Challenge

A rigid, decades-old core made every change slow, costly, and risky, and locked the institution out of Open Banking. Four issues stood in the way:

1. 01

   Rigid monolithic codebase. The architecture prevented feature launches faster than once every six months.

2. 02

   High maintenance costs. Outdated hardware and software lacked modern integration and were expensive to keep running.

3. 03

   Downtime risk on updates. Updates required taking the full system offline, creating significant downtime risk.

4. 04

   Locked out of Open Banking. Without secure, modern API layers, the institution couldn't participate in Open Banking.

The core wasn't just old, it was the ceiling on every product, integration, and release the business wanted to make. The engagement brief

The Solution

Periscope broke the monolith into independently scalable services, exposed them through secure APIs, and put the whole platform on a modern, automated cloud-native delivery pipeline.

Microservices architecture. Migrated from the monolith to independently scalable services, so teams can ship and scale features in isolation.

API-first design. Implemented an API-first strategy for secure third-party integrations, the foundation for Open Banking.

Containerization. Used Docker and Kubernetes for environment consistency and elastic, reliable scaling.

CI/CD pipeline. Established a CI/CD pipeline to automate testing and delivery, removing the offline-update risk.

The Results

A modern, cloud-native core turned a release ceiling into a growth engine.

Faster time-to-market. New-feature time-to-market fell 70%, moving from months to weeks.

Lower cost. IT infrastructure and maintenance costs dropped 30%.

Higher resilience. The platform achieved 99.99% uptime during peak periods and updates.

Digital growth. A new mobile banking suite increased digital user acquisition by 25%.

Decomposing the monolith into secure, containerized services on a CI/CD pipeline cut time-to-market 70% and lifted uptime to 99.99%, and finally opened the door to Open Banking. Outcome summary