The api integration layer that connects every system you already own
Custom API integration built around your architecture, not ours. We map your systems, design the data contracts, build the endpoints, and hand you a stack that actually stays alive after go-live.
Submit your brief → call within 48 hours → scoped proposal in 3 days → Sprint 1 within 1 week of sign-off
Your integrations are costing you more than you think
Every manual sync, every broken webhook, every off-hours alert, they compound. Here is what that looks like versus what it should look like.
Manual reconciliation between disconnected systems creates compounding operational debt.
From signed statement of work to first API live in 18 days
Every integration engagement follows this five-step sequence. You get a fixed-scope phase, a clear handoff point, and a go-live date you can plan around.
Integration Audit
We map every system involved: ERP, ecommerce, customer relationship management, fulfilment, analytics. We identify authentication methods, rate limits, data schemas, and latency constraints before a single line of code is written.
Architecture Design
You receive a full architecture brief: data contract specs, error handling strategy, retry logic, dead-letter queue design, and an entity-relationship map. You review and sign off before build starts.
Build and Test
Endpoints are built against the agreed spec. Every integration includes unit tests, integration tests against sandbox environments, and a load test simulating 3x projected peak volume.
Go-Live and Deploy
Production deployment with traffic monitoring, rollback scripts pre-staged, and Redefine engineers on standby. First live sync is validated end-to-end with your team before we hand over the keys.
Monitor and Expand
30-day hypercare period with direct Slack access to your build engineer. Ongoing managed support retainers available. Clients frequently add one to two additional endpoints within the first quarter after go-live.
Common custom api integration scenarios we deliver every week
ERP to ecommerce inventory sync
Real-time stock levels from Dynamics 365 or NetSuite pushed to Shopify Plus or Magento 2. Orders flow back automatically. No manual exports, no overnight batches, no overselling.
Customer relationship management to ERP customer sync
Salesforce accounts and contacts synced to your ERP in real time. Orders placed in ecommerce reflect on the customer relationship management record automatically.
Third-party logistics and fulfilment API
Orders from any storefront pushed to your third-party logistics integration layer with tracking updates flowing back to the customer automatically.
Headless ecommerce API layer
Custom API endpoints sitting between a headless frontend and your backend stack. Connects Dynamics ecommerce integration with a composable frontend. Cart, pricing, product catalog, and checkout all unified under a single contract.
Image: Engineer configuring a REST endpoint bridge between Microsoft Dynamics ERP and Shopify Plus, a typical Day 10 deliverable on a standard integration engagement.
DrivingI: five systems connected, one coherent data layer
DrivingI's ERP, customer relationship management, and marketing platform operated as three separate data silos. Inventory levels were unreliable at point of sale. Customer approval workflows required manual email chains between departments. Reporting ran 48 hours behind.
Custom REST and webhook APIs connecting Microsoft Dynamics 365 ERP, Salesforce customer relationship management, and a business intelligence reporting layer. Real-time inventory sync eliminated overselling. A custom approval API automated the business-to-business purchase workflow end-to-end.
- 5 systems connected under a single API hub
- 0 manual reconciliation steps remaining
- 48-hour reporting lag reduced to real-time
"For the first time, our ops team and sales team were looking at the same inventory number at the same time. The approval workflow going from email chains to an API call cut our business-to-business order processing time significantly."
The architecture layer that makes it reliable
Every integration we build follows the same core pattern: async queuing, structured error handling, dead-letter routing, and environment-isolated testing. This is what 99.97% uptime looks like in practice.
What sets our api integration company apart from the rest
Many API integration consulting engagements fail on process transparency and post-launch reliability. Here is where we differ.
| Capability | Typical partner | Redefine |
|---|---|---|
| Day-by-day implementation visibility | Weekly status calls only | Shared dashboard, real-time |
| Architecture brief before build | Starts coding without it | Signed off before day 8 |
| Fixed-price option available | Time-and-materials only | Fixed-price from $2,400 |
| Error handling designed upfront | Added reactively post-go-live | Dead-letter queue and retry in spec |
| Post-go-live hypercare period | Handoff ends on go-live day | 30-day direct Slack access |
| Standalone architecture audit | Only with full engagement | $800, credited to build |
API integration consulting: what you need to know
Most single-endpoint integrations go live within 14 to 18 days from signed statement of work. Multi-system projects (ERP plus customer relationship management plus ecommerce) typically take 6 to 10 weeks depending on authentication complexity and legacy system constraints. Every engagement starts with a 3-day audit that produces a realistic timeline before build begins.
Microsoft Dynamics 365, Salesforce, Shopify Plus, Magento 2, NetSuite, and SAP are our most common source and target systems. We also work with custom-built platforms and legacy ERPs through REST, SOAP, and flat-file bridges. See our application integration services page for a fuller list.
Yes. Single-endpoint integrations start from $2,400 on a fixed-price basis. Full ERP-to-ecommerce stacks start from $12,000. Standalone architecture audits are $800 and are credited against any subsequent build. Time-and-materials retainers are also available for ongoing maintenance and expansion work.
Every integration we build includes structured error handling, dead-letter queues, and real-time alerting. If an upstream system goes down, jobs queue rather than fail silently. We also offer a 30-day hypercare period post-launch with direct Slack access to your build engineer, and ongoing managed support retainers for teams that want a longer safety net.
Yes. We build flat-file bridges, SFTP-based exchange layers, and database-level connectors for legacy systems with no REST or SOAP surface. Feasibility is assessed as part of the free architecture brief. In some cases a SOAP-to-REST adapter layer is the most pragmatic route.
Integration platform as a service tools like Zapier or MuleSoft are strong for standard connectors but often fall short on custom business logic, legacy SOAP endpoints, or high-volume transactional flows. We build custom API integration solutions where the data contract, error handling, and performance envelope are designed specifically for your systems rather than adapted from a generic template. Also see our enterprise application integration services for integration platform as a service-adjacent engagements.
Is this the right engagement for you?
Our API integration services are optimised for a specific type of project. Check whether yours fits before booking a call.
Good fit for
- You have two or more systems that need to share data reliably in real time or near-real time
- Your team is losing hours per week to manual data entry or export-import workflows
- You want a fixed scope and a go-live date you can commit to internally
- Your systems include ERP, customer relationship management, ecommerce, fulfilment, or business intelligence platforms
- You need custom logic (approval flows, pricing rules, conditional routing) that an integration platform as a service cannot handle
Not a fit if
- You only need a simple trigger between two software-as-a-service tools with no custom logic
- You want a body-shopping arrangement with no defined deliverables or timeline
- Your systems are fully cloud-based with native connectors that already cover your use case
- You need a managed integration platform as a service license rather than custom endpoint development
Not sure? Tell us your situation and we will be straight with you.
Book a discovery workshop
Tell us about your systems and what needs to connect. We will respond within 48 hours with a call slot and a preliminary architecture brief.
Call within 48 hours → proposal in 3 days → Sprint 1 within 1 week of sign-off
Brief received
We will review your workflow and send a scoped proposal within 3 business days.
Ready to connect your stack?
Clients go from first conversation to first live api integration endpoint in under four weeks. Start with the architecture audit and see what is actually possible.
Submit your brief → call within 48 hours → scoped proposal in 3 days → Sprint 1 within 1 week of sign-off
Your team's time investment is 2 to 3 hours per week: one audit kick-off call, async sign-off on the architecture brief, and go-live validation. We handle everything else.
Image: Redefine engineers and client team reviewing final monitoring dashboards at go-live handover.