High-Performance Banking Platform

A banking web platform re-engineered for speed, scalable state, and secure multi-step flows.

React.jsRedux SagaNode.jsMongoDBAWSGitHub Actions

+40%

Performance

Encrypted

Form security

CI/CD

Deploy automation

Overview

A customer-facing banking platform with complex onboarding and transaction flows, rebuilt for performance, maintainability, and secure data handling.

The business problem

The platform was slow and hard to maintain. Heavy screens janked, state was tangled, and sensitive multi-step forms needed stronger guarantees.

The solution

I led the frontend rebuild: predictable async flows with Redux Saga, modular hooks, encrypted multi-step forms, and contributions to Node.js microservices and AWS delivery.

Architecture

React SPA with Redux Saga for predictable side effects.
Modular custom hooks encapsulating domain logic.
Node.js microservices with MongoDB.
AWS S3/Lambda/CloudFront delivery, automated via GitHub Actions.

Engineering decisions

Redux Saga for controllable, testable async orchestration.
React Hook Form with field-level encryption for sensitive inputs.
Microservice boundaries aligned to business capabilities.

Performance optimizations

Memoization and virtualization on heavy lists - 40% faster.
Bundle splitting and lazy loading for non-critical routes.
Automated CI/CD to reduce manual deploy risk.

Challenges

Cutting render cost on data-dense financial dashboards.
Securing sensitive multi-step onboarding data.
Taming complex asynchronous transaction flows.

Lessons learned

Predictable async architecture is worth its weight in financial apps.
Security and UX are partners, not trade-offs.