REST API Development
Well-designed APIs for system integration and mobile apps.
About the Service
How we can help you.
We design and build APIs that are easy to use, well-documented, and scalable. Perfect for mobile apps, system integrations, or when you need to connect different services.
API development and system integration in Sweden
When systems need to talk to each other, the API is the glue. Pihlfelt designs and builds REST and GraphQL APIs for companies and agencies in Kalmar, Småland and the rest of Sweden — and regularly takes on international integration engagements.
When API development is the right question
A well-built API is documented, versioned, secure and built to last for years.
Common engagements
- Design and development of new REST or GraphQL APIs from scratch.
- Integration between WordPress, WooCommerce and business systems (Monitor, Visma, Fortnox).
- Integration between CRM, marketing automation and website.
- Webhook-based event flows between services.
- API security: authentication (OAuth, API keys), rate limiting, audit logging.
- API documentation that is actually readable.
What We Offer
Questions & answers
Frequently Asked Questions
An API (Application Programming Interface) allows different systems to communicate with each other. You need it to:
- Connect website with business systems
- Build mobile apps that talk to your server
- Automate data flows between services
- Let partners or customers integrate with your system
Yes, we build RESTful APIs as backend for mobile apps. We deliver:
- Well-structured and documented API
- Authentication and security
- Database design and modeling
- Push notifications
The API can be used by both iOS and Android apps.
We always document APIs with industry standards:
- OpenAPI/Swagger specification
- Interactive documentation where you can test calls
- Code examples for common programming languages
- Authentication guide
Good documentation makes it easy for other developers to integrate.
Absolutely! We connect you with:
- Payment solutions (Stripe, Klarna, Swish)
- Shipping companies (Postnord, DHL, etc.)
- CRM systems (HubSpot, Salesforce)
- Email services (Mailchimp, SendGrid)
- Social media
- Accounting systems (Fortnox, Visma)
Security is central to all API development:
- Authentication with OAuth 2.0 or JWT
- HTTPS for all communication
- Rate limiting against overload
- Validation of all incoming data
- Logging and monitoring
Yes, we build custom solutions to fetch and structure data from websites:
- Price monitoring and competitor analysis
- Data collection for analysis
- Automatic updating of product catalogs
We always work with respect for robots.txt and legal aspects.
Ready to get started?
Tell us about your project and we'll get back to you with a free assessment and suggestions for how we can help.
Contact Us