Legacy systems are valuable. Their interfaces are not.
Enterprise legacy systems — ERP, core banking, insurance platforms, manufacturing execution systems — contain decades of validated business logic. They work. But they were built for a world of batch processing, screen scraping and point-to-point integrations. They cannot serve mobile apps, partner portals or real-time dashboards. Every new integration request becomes a custom project, and the backlog grows faster than the team can deliver.
API-first integration solves this by placing a modern API layer in front of legacy systems. The legacy system continues to run unchanged, but its capabilities are now accessible through standard, documented, version-controlled APIs that any modern application can consume.
Discover & Design
We map legacy system capabilities, identify the most valuable functions to expose and design API contracts using OpenAPI or GraphQL schema-first methodology.
Build & Connect
We build the API layer with proper authentication, rate limiting, caching and error handling. Connectors to the legacy system use the most reliable available interface — database, file, message queue or screen scraping as a last resort.
Publish & Govern
APIs are published to a developer portal with documentation, sandbox environments and usage analytics. API governance ensures consistency, versioning and deprecation policies.
What we deliver
Schema-first API design using OpenAPI 3.x or GraphQL SDL. We design APIs that are intuitive for consumers, not mirrors of the legacy system is internal structure.
Adapters for legacy systems via JDBC, ODBC, RFC/BAPI (SAP), MQ Series, file-based interfaces, screen scraping and custom protocols. We connect to whatever the legacy system exposes.
Deployment on Kong, Azure API Management or AWS API Gateway with authentication, rate limiting, request transformation and response caching. Enterprise-grade API infrastructure.
Self-service developer portals with interactive documentation, sandbox environments, API key management and usage analytics. Enabling internal and external consumers to integrate independently.
For systems that need real-time updates, we implement event-driven APIs using webhooks, server-sent events or WebSockets alongside traditional request-response APIs.
Legacy system too rigid to integrate with modern tools?
Talk to an integration engineer who wraps legacy in modern APIs.
Anadolu Efes
Anadolu Efes needed to expose SAP order management, pricing and inventory functions to mobile field-sales applications across multiple countries — without modifying the SAP system.
We built a RESTful API layer on top of SAP using OData and RFC/BAPI connectors, deployed behind an API gateway with caching, rate limiting and offline-sync support for mobile clients.
Mobile applications across 5 countries now consume SAP data through standard REST APIs. New integrations that previously took months are delivered in days.
Where we apply it
- Let mobile apps consume SAP data through clean REST APIs
- Enable partner integrations without exposing legacy internals
- Give mainframe data a modern API layer any team can use
- Query multiple legacy systems through a single GraphQL endpoint
- Turn legacy batch outputs into real-time event notifications
Technologies
Microsoft 
AWS 
SAP