Enterprise Solutions
Enterprise System Integration Architecture
When an organization runs many systems, connecting them one pair at a time creates a tangle nobody can maintain. We design and build the integration layer that sits between them: shared data contracts, middleware, event flows and monitoring, so every system exchanges data the same governed way.
Enterprise System Integration Architecture: the overview
Most organizations reach this point gradually. The ERP was connected to the accounting system, then the CRM to the ERP, then a portal to both, each by a different team with a different approach. Staff still export spreadsheets to fill the gaps, nobody can say which system holds the correct customer record, and a change in one system quietly breaks three others. The problem is no longer a missing connection; it is the lack of an integration architecture.
We start by mapping the systems you run, the data each one owns and the events that should move between them: an order placed, a customer created, an invoice approved. From that map we design one integration layer with shared data contracts, middleware or an event bus for routing and transformation, and clear ownership of each record. Systems without modern APIs, including legacy and government platforms, join through purpose-built connectors that follow the same rules, where their owners permit database, file or protocol access.
Every flow is built for reliability: validation, retries, idempotent operations, alerting and an audit trail of what moved where. New systems then plug into the layer instead of adding another one-off connection. If your need is specifically connecting an ERP to other software, see our ERP integration services page; for a single API integration project, see systems and API integration.
What Enterprise System Integration Architecture includes
Integration Architecture & System Map
A map of your systems, the data each one owns and the events between them, turned into a written integration design.
Shared Data Contracts
Agreed formats and ownership for customers, orders, invoices and other shared records, so every system reads them the same way.
Middleware & Event Flows
A central layer or event bus that routes, transforms and coordinates data between many systems, in real time or on schedule.
Legacy & Closed-System Connectors
Purpose-built connectors for systems that only expose a database, files or an old protocol, following the same rules as modern APIs.
Monitoring, Alerting & Reconciliation
Dashboards, alerts and reconciliation reports so a failed flow is caught and retried rather than silently losing or duplicating records.
Security & Audit Trail
Encrypted transfer, scoped credentials per system and an audit log of every exchange, designed to the requirements of each project.
Who Enterprise System Integration Architecture is built for
Organizations with many systems
Replace a tangle of one-off connections with one integration layer you can maintain.
Groups and multi-department operations
Give every department and entity the same customer, order and finance records.
Organizations adding new platforms
Plug a new CRM, portal or ERP into an existing layer instead of rewiring everything.
Public-sector and regulated teams
Exchange data between departmental and third-party systems with access control and a full audit trail.
Is enterprise system integration architecture the right choice?
A good fit when
- Several systems share customer, order, employee or finance records, and point-to-point connections keep breaking.
- Nobody can say which system holds the correct record, and staff export spreadsheets to fill the gaps.
- New platforms are planned and you want them to plug into one layer instead of adding another one-off connection.
- You need monitoring, retries and an audit trail of what moved where, for operations or regulators.
Consider another option when
- Connecting an ERP to the systems around it (accounting, e-commerce, CRM, payroll): ERP integration services is the page that fits.
- One or two API integrations, or a defined integration project between specific systems: see systems and API integration.
- Only a few systems with simple flows: well-built direct API connections are simpler to run than middleware.
- The systems themselves are outdated and the real fix is replacing one: see legacy software modernization.
Usually in a first release
- A system map and integration design: systems, owned records, events and flows, agreed in writing.
- Shared data contracts for the first records in scope, for example customer and order.
- The integration layer (middleware, message queue or event bus, chosen to fit your scale) carrying the first two or three flows.
- Monitoring, alerting, retries and a reconciliation report for those flows.
- A runbook for your team: what each alert means and who acts on it.
Outside the first release unless agreed
- Connecting every system at once; further flows are added in agreed phases.
- Changes inside vendor systems, or API access the vendor does not provide.
- Licences for commercial middleware, if you choose one; these stay in your name.
- Cleansing all historical data across systems; only the records the flows in scope need.
Anything outside the approved scope is reviewed and agreed before work begins. See how we work.
Data, controls, responsibilities and ownership
Data migration and integrations
- Each system’s access route is confirmed first: documented API, webhooks, database read access, file exports, or none. A system with no route needs vendor cooperation, or a manual export as a stop-gap.
- Record ownership: for each shared record, one system is the source of truth and the others subscribe to its changes.
- Matching keys: before flows go live, existing records are matched across systems (customer IDs, tax numbers, emails) and duplicates resolved, with your sign-off on the match report.
- Idempotent operations and retries mean a repeated message does not create a duplicate invoice or order.
- The middleware choice, whether an open-source message broker, a cloud integration service or a commercial platform you already license, is made in the Select Technology step.
Roles, approvals and audit
- Scoped credentials
- Each system connects with its own credentials and only the permissions its flows need; secrets are kept in a vault and rotated.
- Contract change control
- Changes to a shared data contract are versioned and reviewed, so one team cannot silently break another system.
- Audit log
- Every message records its source, destination, time, status and a payload reference, retained for a period you set.
- Alert ownership
- Each flow has a named owner who receives its alerts and approves reprocessing of failed messages.
What we need from your team
- A named integration owner with authority across the departments involved.
- Admin or API access to each system, and introductions to the vendors who control them.
- Decisions on which system owns each shared record.
- Test environments or sandboxes for the systems involved, where vendors provide them.
- Staff to check reconciliation reports during UAT.
Ownership, support and running costs
- Project source code, designs and documentation transfer to you on full payment, and your data is yours throughout; see our IP and ownership policy.
- Running costs fall into hosting for the integration layer, message broker or cloud integration service usage, any commercial middleware or vendor API fees, monitoring, and support.
- Vendor API changes need maintenance over time; plan for it under software maintenance and support.
Related reading for this decision
- ERP integration services
When the work is mainly connecting one ERP to accounting, CRM, e-commerce or payroll systems.
- Systems and API integration
For a defined integration project between specific systems, without a wider integration layer.
- Workflow automation
Approval workflows that run on top of the integration layer and act on live records.
- Security and data protection
How credentials, encryption and access are handled for data moving between systems.
How we deliver Enterprise System Integration Architecture
Custom software built around the way your business works. Five steps, with a free pilot of 2 to 3 key modules before the full build.
Step 1: Understand
We learn how your business works.
Your requirements, workflow, challenges and goals, understood before anything is recommended.
Step 2: Plan
We design the right solution around your workflow.
Modules, workflows, roles, approvals, reports and integrations, agreed before development.
Step 3: Select Technology
Choose the right technical foundation.
Technology options matched to your users, security, budget and growth, not one fixed stack.
- Free pilot
Step 4: Pilot
Test our work before full project development.
Free. You choose 2 to 3 key modules and we build them first, so you can judge our work.
The full project starts only after you approve the pilot.
- Full project
Step 5: Build & Scale
From approved pilot to complete digital system.
Full development, testing, deployment, training and support, built to grow with you.
Guides for this decision
In-depth, practical reading for teams planning this kind of project.
- Guide · 10 min readSystem Integration Approaches: Point-to-Point, Middleware, iPaaS or Events?Point-to-point APIs, middleware, iPaaS, event-driven and file-based integration each fit different situations. This guide compares them, then covers the decisions that matter more than the pattern: system of record, idempotency, retries, error queues, reconciliation and security.Read the guide
- Guide · 11 min readERP Data Migration: A Step-by-Step Plan for Moving Off Spreadsheets and Old SystemsERP data migration moves master data, opening balances and open transactions into the new system, then proves them through reconciliation before anyone relies on them. This guide sets out the stages, the tie-outs and a printable checklist.Read the guide
Enterprise System Integration Architecture FAQ
ERP integration connects an ERP to the systems around it and is covered on our ERP integration services page. A single API integration connects two systems for one purpose. Enterprise integration architecture is the layer underneath many such connections: shared data contracts, middleware or an event bus, and monitoring, so every system exchanges data the same way.
Not always. With a few systems and simple flows, well-designed direct APIs can be enough. Once several systems share the same records, or a change in one must reach many others, a central layer or event bus is easier to govern and maintain. We recommend the lighter option when it is enough.
Where the system’s owner permits it, we build a connector through its database, file exports or older protocol, with the same validation, retries and monitoring as an API connection, so legacy and closed systems can take part in the architecture. Where no access is possible, a scheduled manual export can bridge the gap.
Each shared record has one owning system, flows use validation and idempotent operations, and reconciliation reports compare systems on a schedule, so a failed transfer is caught and retried rather than silently losing or duplicating records.
Data is encrypted in transit, each system has scoped credentials, and every exchange is logged. Security requirements are agreed for each project and designed in from the start.
Yes, on full payment. The project source code, designs and documentation transfer to you, and your data is yours throughout. We prefer open standards and open-source components, which keep their own licences; any commercial middleware you choose stays licensed in your name.
See working software before you commit
Before you commit to the full project, we build 2 to 3 of your key modules as working software, free of charge. Your team tests the pilot, and the full build starts only after you approve it.
See how the free pilot worksUnderstand
We learn your requirements and how your organisation works today.
Select pilot modules
Together we choose 2 to 3 key modules that prove the solution.
Build the working pilot
We build those modules as real, working software, free of charge.
You test it
Your team uses the pilot. The full project starts only after you approve it.
Start a conversation
Tell us how your business works.
Describe what is slowing your team down. We will help you work out what to build, and how a free pilot lets you judge our work before the full project.
Prefer WhatsApp? Start a chatWhat happens next
You send a short brief
The problem, the people involved and any target date. A senior engineer replies within 4 business hours.
We understand your workflow
A first call about how your business works today. An NDA can be signed before you share details.
You test a free pilot
You choose 2 to 3 key modules and we build them first, so you judge real software before the full project.