The Business Challenge

Legacy banking systems are costly to maintain, difficult to scale,
and prevent financial institutions from competing with digital-first competitors.

Current Pain Points:

Monolithic Architecture: One codebase does everything, changes are risky and slow
Technical Debt: Decades of patches, outdated frameworks, scarce talent
Can't Scale: System bottlenecks prevent growth and new product launches
Security Vulnerabilities: Old systems lack modern security standards
Integration Nightmares: Can't connect to modern channels (mobile, web, APIs)
Costly Maintenance: Paying premium for developers who know legacy tech

What Success Looks Like:

Modern microservices architecture with independent deployment
API-first design enables mobile, web, and third-party integrations
Gradual migration with zero downtime and zero data loss
Improved performance and scalability to handle growth
Reduced maintenance costs and faster feature delivery
Enhanced security with modern authentication and encryption

Our Solution: Strategic Banking Modernization

A phased migration approach using the strangler pattern and API-first architecture,
proven with financial institutions across Ecuador and LATAM.

Core Features

Legacy Assessment & Strategy

Brownfield vs greenfield analysis, risk assessment, detailed migration roadmap

Strangler Pattern Migration

Gradually replace old system piece by piece, zero downtime, parallel running

API Gateway & Integration

Modern API layer over legacy, enable new channels (mobile, web) while migrating backend

Microservices Architecture

Break monolith into services, independent deployment, better scalability

Data Migration & Sync

Secure data migration, bidirectional sync during transition, zero data loss

System Integration

Connect to core banking, payment gateways, regulatory systems, third-party services

Brownfield vs Greenfield Decision Framework

Not all modernization projects are the same. We help you choose the right approach
based on your business constraints, timeline, and risk tolerance.

Brownfield Approach

When to use: Most banks. Incremental, lower risk, maintains business continuity.

Good when:

System is working but needs improvement
Tight budget or can't pause operations
Regulatory compliance requires continuity
Risk aversion is high

Strategy: Refactor existing code, add API layer, gradually migrate modules.

Greenfield Approach

When to use: System beyond repair. Complete modernization, but higher risk.

Good when:

Legacy system is completely obsolete
Competitive pressure requires rapid change
Budget available for full rebuild
Business model is changing significantly

Strategy: Build new system from scratch, run parallel, cutover when ready.

Hybrid Approach (Recommended)

When to use: Best of both worlds. Start greenfield on top, migrate brownfield underneath.

Our recommendation for most banks:

Build new API layer (greenfield) over legacy core
Launch modern mobile/web channels immediately
Gradually migrate backend services (brownfield)
Customers see benefits fast, risk stays low

Strategy: Strangler pattern—new features use new stack, old features migrate gradually.

Our Assessment Process

We start every engagement with a 2-week technical assessment: analyze your legacy system, identify migration risks, and recommend the optimal approach. No commitment required.

Technical Architecture

Modern Frontend Stack

Web: React, responsive design, progressive web app capabilities
Mobile: React Native for iOS/Android, native performance
Admin: React-based dashboards for operations and compliance teams
Security: OAuth 2.0, MFA, biometric authentication

Microservices Backend

Services: Node.js, Python, Java—choose the right tool per service
API Gateway: Kong or AWS API Gateway for routing and security
Messaging: RabbitMQ or Kafka for async communication
Databases: PostgreSQL (relational), MongoDB (documents), Redis (caching)

AWS Infrastructure

Compute: ECS/EKS for containers, Lambda for serverless functions
Storage: RDS for databases, S3 for documents, ElastiCache for performance
Security: VPC isolation, encryption at rest/transit, WAF protection
Compliance: PCI-DSS, SOC 2, audit logging, data residency controls

Integration Layer

APIs: REST and GraphQL for modern integrations
Legacy: SOAP, XML adapters for old core banking systems
Payment Gateways: Stripe, local processors, SWIFT integration
Regulatory: Central bank reporting, AML/KYC systems, tax authorities

Deployment Timeline & Process

Weeks 1-2

Assessment & Strategy

Legacy system analysis, risk assessment, migration roadmap

Weeks 3-8

API Layer Development

Build API gateway, first microservices, mobile/web channels

Weeks 9-12

Pilot & Testing

Beta users, security testing, load testing, compliance review

Weeks 13-16

Launch & Migrate

Production deployment, gradual user migration, monitoring

Phased Migration Strategy

Phase 1: API Layer (12-16 weeks)

Modern API gateway sits in front of legacy core. Enable mobile/web channels immediately.

Phase 2: First Services (3-4 months)

Migrate non-critical services (notifications, reports, customer profiles) to microservices.

Phase 3: Core Migration (6-12 months)

Gradually move core banking functions (accounts, transactions, payments) to new stack.

Banking / Financial Services

Banking System Modernization