# API Development and System Integration

API development and system integration connects your software with payment gateways, PSPs, ERP and HR systems, SMS providers and government services. We build REST and SOAP integrations with retries, idempotency, logging and monitoring, so data stays consistent between systems when something fails.

## Deliverables

- API design and documentation
- Payment gateway and PSP integration
- Two-way sync with ERP or HRMS
- Queueing, retries and idempotency
- Monitoring and alerting

## Technology

- ASP.NET Core
- C#
- SQL Server
- RabbitMQ
- REST
- SOAP
- Oracle

## FAQ

### What is included in api development and system integration?

Typical deliverables are: api design and documentation; payment gateway and psp integration; two-way sync with erp or hrms; queueing, retries and idempotency; monitoring and alerting. The exact scope is agreed after a short discovery phase.

### How much does api development and system integration cost?

Cost depends on scope, integrations, number of users and compliance needs. After discovery we provide a fixed estimate or a time-and-material plan with written assumptions so you can compare options before committing.

### How long does api development and system integration take?

Timelines vary with scope. We split work into milestones and release working software early, so you can validate direction before the full build is complete.

### Which technologies will you use?

For this service we typically work with REST, SOAP, RabbitMQ, ASP.NET Core, C#, SQL Server, Oracle. We choose the stack to fit your existing systems and your team's ability to maintain it.

### Do you provide support after launch?

Yes. We offer maintenance and support plans covering bug fixes, upgrades, monitoring and enhancements, and we hand over documentation so you are never locked in.

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Source: https://invozeal.com/services/api-integration