System and API integration
We make ERPs, CRMs, e-commerce and internal applications talk to each other: data aligned in real time, no double entry, monitored and secure flows.
Systems that do not talk to each other cost you every day
ERP, e-commerce, CRM, warehouse management, a supplier's software: almost every company uses several, bought or built at different times. When they are not connected, people do the connecting: orders retyped by hand, files exported and re-imported, prices updated in two places, errors discovered by the customer.
System integration removes these steps: data originates in one place and reaches where it is needed, in the right format and at the right time, with control over what happens when something goes wrong.
What we integrate
-
ERP and e-commerce. Prices, availability, orders and customers aligned between the management system and the online store, in real time where needed.
-
CRMs, management systems and internal applications. Master data, contracts and requests flowing from one system to another without being retyped.
-
Partner and supplier systems. Data flows with banks, insurers, couriers or suppliers, via APIs, web services or files exchanged under precise rules.
-
Legacy systems. Applications without modern APIs, for which we build an integration layer so the rest of the architecture does not depend on their limits.
-
Search engines and external services. Catalogues that automatically feed OpenSearch, Algolia or other services, keeping them always up to date.
-
AI agents. Your APIs exposed in a controlled way to assistants and AI agents through MCP Servers.
How we design an integration
-
Map the flows. Which data, from where to where, how often, who owns it and what happens if it arrives late or wrong.
-
Define the contracts. We design interfaces before code, with an API-first approach: each system knows exactly what to expect from the others.
-
Choose the model. Synchronous APIs, real-time events, message queues or periodic batches, based on the process rather than on the trend of the moment.
-
Plan for failure. Automatic retries, duplicate handling, a searchable history of rejected records: an integration is judged by how it behaves when something breaks.
-
Monitor. Every flow is observable, so problems are caught before customers and colleagues notice them.
Real cases
Real-time ERP → e-commerce synchronisation
An ERP had to propagate price and availability changes to the e-commerce site immediately, without waiting for the nightly batch. We designed the architecture and put into production a pipeline (Oracle → Debezium → RabbitMQ) that captures every change and propagates it instantly, validated with stress tests on more than 12 million concurrent events before release.
Search engine for a multi-brand e-commerce
A client needed to integrate an advanced search engine into its e-commerce, with the same solution working across several stores and brands of the group. We designed the integration and the flow that automatically feeds the indexes from the product catalogue: it is in production today and reused across several e-commerce sites without duplicating work. More on the e-commerce integrations page.
Daily data flows from banks and insurers — Fintech
Every day banks and insurers send our client the master data and portfolios of their account holders. We redesigned validation, import and calculation: processes that took hours now run in minutes, with rejected records searchable by analysts. Details on the data pipelines and ETL page.
Technologies
APIs and services: REST, GraphQL, Java, Spring Boot, Quarkus, Node.js, NestJS
Events and messaging: RabbitMQ, Debezium (change data capture)
Flow automation: n8n, AWS Lambda, AWS Step Functions
Search: OpenSearch, ElasticSearch, Algolia
Looking for the bigger picture of what we build? See the page on custom software development.
Frequently asked questions
Can you integrate a system that has no API?+
Often, yes. We look at what the system offers: web services, database access, files exchanged at regular intervals, message queues. When there is no suitable interface, we build an integration layer that provides one, so other systems talk to clean APIs instead of to the legacy system directly.
Real-time integration or periodic updates?+
It depends on what stale data costs you. Prices and availability shown on an e-commerce site usually need to be updated immediately; a management report can be recalculated every night. We choose the model based on the process: real-time events when needed, batch when it is enough and simpler to run.
What happens if one of the systems is unreachable?+
It is one of the first things we design for. We use message queues and automatic retries, so data is not lost and is delivered when the system comes back; errors end up in a searchable history and flows are monitored, so problems are spotted before users notice.
What is the difference between system integration and ETL?+
Integration connects applications so they work together, often in real time: an e-commerce order reaching the ERP, stock levels updating on the website. ETL moves and transforms volumes of data, usually at intervals, to make them available for analysis and downstream applications. You often need both: see the page on data pipelines and ETL.
How do you secure the data being exchanged?+
Every integration has authentication, permissions limited to what is needed and encrypted communication. Where required we keep track of who read or changed what, and we design flows so that each system exposes only the data the others need.
Can we connect our systems to an AI agent?+
Yes. The same APIs that connect your systems can be exposed, with the right controls, to AI assistants and agents through MCP Servers. More on the page about AI agents and intelligent integrations.
Want to learn more? Let's talk over a coffee ☕
Let's talk about your project