REST API GraphQL Microservices

API developer in the Netherlands

Appfront develops custom APIs and backend systems for Dutch businesses. We specialise in creating tailor-made solutions, from REST APIs to complex microservices architectures that fit your specific needs precisely.

Free consultation Our specialisms
API

Why choose our API development?

APIs are the backbone of modern software. As an experienced API developer in the Netherlands, we can help build custom backend solutions that connect your systems.

Experience & expertise

Our team has experience with modern API technologies and architectural patterns. We can help develop backend solutions suited to your particular situation.

  • Experience in backend development
  • Microservices expertise
  • Cloud-native technologies
  • Security-conscious development

API-first development

We can work to an API-first development strategy, in which the API is the starting point. This approach can contribute to consistent and reusable backend solutions for your project.

  • Design-first methodology
  • Comprehensive documentation
  • Automated testing
  • Versioning strategy

API Development Services

From simple REST APIs to complex microservices architectures, our developers can create custom backend solutions that align with your business objectives.

REST API Development

We can develop REST APIs according to modern standards, tailored to your specific requirements and integration needs.

  • RESTful design principles
  • HTTP status codes
  • JSON/XML responses
  • OpenAPI documentation
  • Rate limiting & caching

GraphQL Development

GraphQL implementations can offer a flexible solution for complex data requirements. We can help you develop GraphQL solutions that suit your project.

  • Type-safe schemas
  • Real-time subscriptions
  • Efficient data fetching
  • Introspection & tooling
  • Apollo/Relay compatible

Microservices Architecture

Microservices architecture can be a good choice for complex systems. We can advise on and help implement modular backend solutions.

  • Domain-driven design
  • Service mesh
  • Container orchestration
  • Event-driven architecture
  • Distributed tracing

API Gateway

A central access point for all your APIs. Secure, controlled and monitored access.

  • Authentication & authorisation
  • Request routing
  • Rate limiting
  • Analytics & monitoring
  • API versioning

Database Integration

Optimal database connectivity and data access patterns, from SQL to NoSQL databases.

  • ORM/ODM implementation
  • Connection pooling
  • Query optimisation
  • Database migrations
  • Backup & recovery

Third-party Integrations

Seamless integrations with external services and platforms, from payment providers to CRM systems.

  • Payment integrations
  • CRM/ERP integrations
  • Social media APIs
  • Cloud services
  • Webhook handling

Technologies & Tools

We use modern, proven technologies to build robust and scalable APIs. The choice depends on your specific requirements.

💻

Backend

Node.js, Python (Django/FastAPI), Java (Spring Boot), .NET Core

🗄️

Databases

PostgreSQL, MongoDB, Redis, Elasticsearch, InfluxDB

☁️

Cloud

AWS, Azure, Google Cloud, Docker, Kubernetes

🔧

Tools

Swagger/OpenAPI, Postman, Jest, Jenkins, Grafana

Development Process

Our structured process is designed to develop APIs that are well documented, tested and maintainable.

1

Analysis & Design

We analyse your requirements and can design an API structure that matches your needs.

2

Development

We can work according to agile principles with regular updates. Quality and testing are important aspects of our development process.

3

Testing & QA

We pay attention to various aspects of testing, depending on the requirements of your project.

4

Deployment

We can help with deployment and monitoring solutions that suit your infrastructure and needs.

API development investment

The investment for API development depends on various factors such as complexity, scope and specific requirements. Every situation is unique, which is why we always work with bespoke quotes.

Basic API

Straightforward API implementations with core functionality, suitable for smaller projects or as a starting point for further expansion.

  • Limited number of endpoints
  • Authentication options
  • Database connectivity
  • Basic documentation

Business API

More advanced API solutions with more complex functionality, suitable for business processes with specific integration requirements.

  • Extensive endpoint sets
  • Advanced authentication
  • External system integrations
  • Performance optimisations

Enterprise API

Complex enterprise solutions with advanced architecture, suitable for large-scale projects with demanding performance and availability requirements.

  • Microservices architecture
  • Centralised API management
  • Real-time functionality
  • Scalability solutions

Frequently Asked Questions

What is the difference between REST and GraphQL APIs? +
REST APIs use fixed endpoints for different actions (GET /users, POST /users), whereas GraphQL has a single endpoint where clients can specify exactly which data they need. GraphQL is more flexible and efficient for complex queries, but REST is simpler and more widely supported.
How long does API development take? +
This depends largely on the complexity and specific requirements. Straightforward API implementations can be delivered relatively quickly, while more complex architectures take longer. We always draw up a plan that suits your project and budget.
Which technologies do you use for API development? +
We work with modern technologies such as Node.js, Python (Django/FastAPI), Java (Spring Boot) and .NET Core. For databases we use PostgreSQL, MongoDB and Redis. Cloud deployment takes place via AWS, Azure or Google Cloud. The choice depends on your specific requirements.
Do you also take care of API documentation and testing? +
Absolutely. Comprehensive documentation via tools such as Swagger/OpenAPI and automated testing are standard parts of our API development. We implement unit tests, integration tests and load tests to guarantee reliability.
Can you improve or modernise existing APIs? +
Yes, we are happy to help modernise legacy APIs. This can include performance optimisation, security updates, improved documentation, or migration to modern architectural patterns such as microservices.
Do you also provide support and maintenance after delivery? +
Yes, we offer several support packages, ranging from basic monitoring to fully managed services. These include performance monitoring, security updates, bug fixes and new feature development.

Ready for scalable APIs?

Start modernising your backend architecture today. Get in touch for a no-obligation advisory conversation or request a quote directly.

Free advisory session Drawing up an API roadmap

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