System integration
Lemraj designs and delivers enterprise integration — the layer that connects ERP, CRM, identity, billing, and bespoke systems so that data, money, and process flow correctly across them.
Who it's for
This service is for organisations carrying one or more of the following:
- An integration estate built up over years of point-to-point connections, where every new project adds another connector and the operational picture is no longer legible.
- A vendor-supplied enterprise service bus (ESB) that has become a maintenance liability rather than a platform.
- A modernization or replatforming programme where the integration boundary is the harder problem than the application itself.
- A cross-system business process — claims, onboarding, payments, member administration, case management — that is held together by manual reconciliation.
Most of our integration work is in insurance and financial services, in Dutch and EU public-sector programmes, and in enterprises with large internal systems estates.
What's included
A system integration engagement at Lemraj usually includes some combination of:
- Integration assessment. Mapping of the existing connection topology, ownership, data ownership, and the failure modes operations actually deals with day-to-day.
- Target integration architecture. A target state — API-led, event-driven, message-based, or a hybrid — chosen to fit the real constraints of the business and not the architecture diagram of a vendor.
- Contract and schema design. Stable interface contracts (REST, gRPC, message envelopes, file-based where appropriate) that systems can integrate against without coupling to each other's internals.
- Implementation and migration. Building the new integration layer, migrating traffic from the old paths, and decommissioning the connections that are no longer needed.
- Operational design. Observability, retry semantics, dead-letter handling, replay, and alerting designed before launch.
- Documentation and handover. Integration documentation that operations and downstream teams can rely on, not slide decks.
We do not build integration layers we cannot operate ourselves. We do not introduce new platforms when an existing one will do.
How we engage
- Typical timing: 2–4 week paid discovery, then 3–6 months for a defined integration scope, or 6–12 months for larger estates in phased releases.
- Team shape: Lead architect plus senior associates engaged for specific delivery phases. Integration work tends to demand more than one senior practitioner per phase.
- Contracting: Time and materials with defined scope and milestones. Fixed-fee discovery for the entry-point engagement.
- Engagement size: From €25,000.
Outcomes
A typical integration engagement produces:
- A documented target integration architecture and phased delivery plan that the client owns.
- A reduced and observable integration layer in production, replacing connections that operations could not see into.
- Decommissioning of legacy connectors and middleware no longer in active use.
- An operations team that can run the new layer without Lemraj on call.
Specific outcomes — transaction volumes, peak throughput, latency, error-budget improvements — are available on request, subject to the relevant client NDA.