API Development & Integration for Fintech & Financial Services in Leeds
We help banks, insurance companies, payment providers, and fintech startups in Leeds with Connect everything with robust, scalable APIs.
The toolkit for Fintech & Financial Services
Deep expertise meets modern technology — tailored for Fintech & Financial Services.
RESTful APIs
Standards-compliant REST APIs with comprehensive documentation
Tailored for banks, insurance companies, payment providers, and fintech startups
GraphQL
Flexible query APIs that reduce over-fetching and round trips
Tailored for banks, insurance companies, payment providers, and fintech startups
Third-Party Integration
Connect CRMs, payment gateways, ERPs, and hundreds of services
Tailored for banks, insurance companies, payment providers, and fintech startups
API Gateway
Centralised routing, authentication, and rate limiting
Tailored for banks, insurance companies, payment providers, and fintech startups
Webhook Systems
Real-time event notifications for seamless automation
Tailored for banks, insurance companies, payment providers, and fintech startups
API Documentation
Interactive Swagger/OpenAPI docs that developers love
Tailored for banks, insurance companies, payment providers, and fintech startups
Working with a team that understands Fintech & Financial Services made all the difference. They knew our challenges before we explained them.
— Fintech & Financial Services Client
Our approach to Fintech & Financial Services
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Connect any system to any system with clean, documented APIs
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Enable third-party developers to build on your platform
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Reduce integration time from months to weeks with standardised APIs
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Handle millions of requests with optimised, cached API responses
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Improve security with OAuth 2.0, rate limiting, and API key management
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Future-proof your architecture with API-first design principles
From idea to launch
Our proven methodology delivers results, every time.
API Strategy
Define endpoints, data models, and integration requirements
Schema Design
Design request/response schemas and error handling patterns
Development
Build APIs with versioning, validation, and comprehensive testing
Documentation
Create interactive documentation with examples and SDKs
Monitoring
Set up logging, analytics, and alerting for API health
Got questions? We've got answers.
REST is simpler and better for public APIs with predictable data needs. GraphQL excels when clients need flexible queries or you want to reduce API calls.
We use URL versioning (v1, v2) for major changes and additive changes for minor updates, ensuring backward compatibility.
Yes — we have experience integrating with hundreds of third-party APIs including Salesforce, HubSpot, Stripe, SAP, and custom enterprise systems.
We implement OAuth 2.0, API keys, rate limiting, input validation, CORS policies, and encryption for all API communications.
We optimise with caching (Redis), pagination, compression, connection pooling, and CDN distribution for global performance.