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API Development & Integration Services

River API is your reliable UK partner for API development, integration, and management services. Our mission is to solve infrastructure bottlenecks, replace failed workflows, and support scalable business growth. We work with fast-moving startups and enterprise teams alike, delivering robust, high-quality API development and API integration services.
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Our API & Integration Services

As a leading API development company, we build custom APIs that fit your architecture, not the other way around. Whether you're connecting legacy platforms, stitching together SaaS tools, or building a product that runs on clean, scalable integrations, our developers handle the complexity so your systems work like one.

API Integration
& Development
Third-party API Integration
Cloud Integration
Microservices
& Cloud-based APIs
Data Synchronization
Custom API Integration & Development
At River API, we build APIs that connect systems without friction. Whether you’re creating internal services or linking external platforms, we design each endpoint to be secure, scalable, and easy to maintain.
Key stages of custom API development service:
  • API design and architecture planning
  • Development with REST, GraphQL, or Webhooks
  • Testing, documentation, and versioning
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Third-party API Integration
We connect your product to the tools your team actually uses: Stripe, Salesforce, HubSpot, Twilio, Xero, and more. Clean, consistent integrations with no breakpoints or data chaos.
Key stages of third-party API integration service:
  • Authentication and data mapping
  • Real time or scheduled sync setup
  • Error handling and edge-case testing
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Cloud Integration
Running across AWS, Azure, or GCP? We build bridges between services that hold up under load, maintain visibility, and simplify data flow.
Key stages of cloud integration service:
  • Assessment of cloud infrastructure
  • Integration and security design
  • Performance tuning for scale
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Microservices & Cloud-based APIs
Break free from monolithic code. We help teams refactor legacy systems into modular, API-connected services that deploy faster and scale cleanly.
Key stages of microservices and cloud-based API services:
  • Service decomposition and scoping
  • API gateway setup and orchestration
  • Containerization and deployment
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Data Synchronization
Your reports are only as accurate as your data synchronisation. We build reliable pipelines to keep platforms in sync, so analytics, ops, and customer tools stay aligned.
Key stages of data synchronization services:
  • Real-time and batch sync setup
  • Conflict handling and ensuring data integrity
  • Monitoring and alerting configuration
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Our Tech Stack

Genesys
Shopify
Node.js
Kotlin
Unity
Java
PHP
iOS
android
Salesforce
Drupal
React.js
Flutter
Vue.js
Laravel
Adobe commerce
Angular
Swift
Python
Objective c
WordPress
Next-js
Symfony
Magento

Our API Development Process

Our API service provider teams deliver clean, well-structured software solutions from planning through production. We work through each stage with clarity, defining what the API needs to do, how it should behave, and how it will scale. Each API we ship is tested, documented, and future-proofed.

01. Define
Pinpoint the API’s core purpose, required functionality, and intended users to guide architecture and business logic.
02. Design
Map out endpoints, methods, data structures, and flows, creating a blueprint that aligns tech with use cases.
03. Develop
Write efficient, maintainable codebases using the best-fit frameworks and languages for your stack and project scope.
04. Test
Run targeted unit, integration, and performance tests to eliminate bugs, prevent bottlenecks, and validate behaviour under load.
05. Secure
Apply strict access control, encryption, and monitoring. We build security into every layer, not as an afterthought.
06. Document
Deliver clear, usable documentation that makes life easier for your dev team now and every time the API evolves.

How Businesses Can Benefit From Our API Development & Integration Services

API development and integration services by River API help businesses move faster, operate smarter, and build systems that scale with demand. Whether you're looking to automate internal workflows or connect products to third-party platforms, our software engineers build the infrastructure that makes it possible.

Streamline operations by automating data flow across tools, platforms, and departments
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Reduce manual errors and save hours of duplicated effort with reliable integrations
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Support growth with APIs built to scale alongside your business
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Improve user experience by connecting systems for seamless service delivery
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Accelerate innovation with infrastructure that allows you to deploy new features without friction
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Get in Touch

River API offers a full range of API-related solutions to help you achieve your business goals. Let us be your reliable partner in API development and integration services.
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Get in Touch

Ready to connect the dots across your systems? Let’s build integrations that keep your business moving forward.
Thank you! Your submission has been received!
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