Legacy System Modernization
We specialize in modernizing legacy systems while maintaining business continuity, from mainframe migrations to monolith decomposition.
Our Expertise
- Mainframe integration - AS/400, COBOL, legacy databases
- Monolith decomposition - Strangler pattern migrations
- Platform rewrites - Ruby to Java, .NET to modern stacks
- Data migration - Zero-downtime database transitions
- API wrapping - Modern interfaces for legacy systems
Proven Migrations
We've successfully modernized critical platforms:
- Grindr - Ruby monolith to Java microservices (40K RPS)
- Roto-Rooter - AS/400 integration with modern mobile apps
- Multiple enterprises - Mainframe to cloud migrations
Migration Strategies
Strangler pattern - Gradual replacement, no big bang
Parallel running - Run old and new systems simultaneously
Feature flags - Controlled rollout to user segments
Data synchronization - Keep systems in sync during migration
Rollback capability - Quick reversion if needed
Technologies We Handle
Legacy: AS/400, COBOL, Ruby, .NET Framework, PHP
Modern: Java/Spring Boot, Node.js, Dart, Python
Databases: Oracle → PostgreSQL, SQL Server → Aurora
Integration: REST APIs, message queues, ETL pipelines
