---
title: "API Development & Integration"
category: "Software Development"
icon: "🔌"
short_description: "Custom API development, third-party integrations, microservices architecture, and API management solutions."
---

# API Development & Integration

Build robust, scalable APIs and seamlessly integrate third-party services into your applications. We design and implement APIs that power modern applications and enable seamless data exchange.

## RESTful API Development

### API Design & Architecture
- Resource-oriented design
- HTTP method best practices (GET, POST, PUT, DELETE, PATCH)
- URL structure and naming conventions
- Versioning strategies (URL, header, content negotiation)
- HATEOAS and hypermedia APIs

### Implementation
- Node.js (Express, Fastify, NestJS)
- Go (Gin, Echo, Fiber)
- Python (FastAPI, Django REST, Flask)
- PHP (Laravel, Symfony)
- Authentication and authorization (JWT, OAuth 2.0, API keys)

### API Features
- Pagination and filtering
- Rate limiting and throttling
- Caching strategies (Redis, CDN)
- Error handling and status codes
- Request validation and sanitization
- CORS configuration

## GraphQL APIs

### GraphQL Server Development
- Schema design and type definitions
- Query, mutation, and subscription resolvers
- DataLoader for efficient data fetching
- Apollo Server, GraphQL Yoga
- Federation for microservices

### GraphQL Features
- Real-time updates with subscriptions
- Batch requests and caching
- Query complexity analysis
- Persisted queries
- Custom directives

## WebSocket & Real-Time APIs

### Real-Time Communication
- WebSocket server implementation
- Socket.IO for cross-browser compatibility
- Server-sent events (SSE)
- Long polling fallbacks
- Room-based messaging

### Use Cases
- Live chat applications
- Real-time dashboards
- Multiplayer games
- Collaborative editing
- Live notifications
- Stock tickers and trading platforms

## Third-Party API Integration

### Payment Gateways
- Stripe, PayPal, Square integration
- Cryptocurrency payment processors (BTCPay Server, Coinbase Commerce)
- Subscription and recurring billing
- Webhook handling
- Payment reconciliation

### Social Media APIs
- Twitter/X API integration
- Facebook/Instagram Graph API
- LinkedIn API
- TikTok API
- Discord and Telegram bot APIs

### Cloud Service Integration
- AWS SDK integration (S3, Lambda, SES, SNS, SQS)
- Google Cloud APIs (Cloud Storage, Pub/Sub, Vision AI)
- Azure services integration
- DigitalOcean Spaces and services

### Communication APIs
- Twilio (SMS, voice, video)
- SendGrid (email delivery)
- Mailgun, Postmark
- Slack API integration
- Microsoft Teams webhooks

### Business Services
- QuickBooks API integration
- Salesforce integration
- HubSpot CRM
- Shopify and WooCommerce
- Stripe Connect for marketplace platforms

## Microservices Architecture

### Service Design
- Domain-driven design principles
- Service boundaries and responsibilities
- Inter-service communication patterns
- Service discovery (Consul, etcd)
- API gateway implementation (Kong, Tyk, AWS API Gateway)

### Messaging & Events
- Message queues (RabbitMQ, Apache Kafka)
- Event-driven architecture
- Command Query Responsibility Segregation (CQRS)
- Event sourcing patterns
- Saga pattern for distributed transactions

## API Security

### Authentication & Authorization
- OAuth 2.0 and OpenID Connect
- JWT token management
- API key rotation
- Role-based access control (RBAC)
- Attribute-based access control (ABAC)

### Security Best Practices
- HTTPS/TLS enforcement
- Input validation and sanitization
- SQL injection prevention
- XSS and CSRF protection
- Rate limiting and DDoS mitigation
- API key and secret management

## API Documentation

### Documentation Tools
- OpenAPI/Swagger specification
- Postman collections
- API Blueprint
- GraphQL schema documentation
- Interactive API documentation (Swagger UI, Redoc)

### Developer Experience
- Code samples and SDKs
- Sandbox environments
- Changelog and versioning
- API status page
- Getting started guides

## API Management & Monitoring

### API Gateway Features
- Request routing and transformation
- Response caching
- Rate limiting by endpoint
- Analytics and usage tracking
- API versioning management

### Monitoring & Analytics
- Request/response logging
- Performance metrics (latency, throughput)
- Error tracking and alerting
- Usage analytics per endpoint
- Cost allocation and billing

## Webhook Development

### Webhook Infrastructure
- Webhook endpoint creation
- Signature verification
- Retry logic and exponential backoff
- Webhook delivery monitoring
- Idempotency handling

### Webhook Use Cases
- Payment notifications
- Order status updates
- User activity tracking
- System event notifications
- Integration triggers

## gRPC & Protocol Buffers

- High-performance RPC framework
- Protocol buffer schema design
- Streaming APIs (unary, server, client, bidirectional)
- Service mesh integration
- Cross-language compatibility

## API Testing & Quality Assurance

- Unit testing with mocking
- Integration testing
- Load testing and performance benchmarking
- Contract testing
- Automated API testing (Postman, Newman, Insomnia)

## API Deployment & DevOps

- Containerization (Docker)
- Orchestration (Kubernetes)
- CI/CD pipeline integration
- Blue-green and canary deployments
- Auto-scaling configuration

## Specialized APIs

### Blockchain APIs
- Ethereum node RPC integration
- Web3 provider APIs
- NFT metadata APIs
- DeFi protocol integration
- Blockchain indexing APIs (The Graph)

### AI/ML APIs
- OpenAI API integration
- Custom ML model serving
- Computer vision APIs
- Natural language processing
- Speech-to-text and text-to-speech

### IoT Device APIs
- MQTT broker integration
- CoAP protocol implementation
- Device management APIs
- Telemetry data collection
- Remote device control

## Technical Expertise

- **Languages:** JavaScript/TypeScript, Go, Python, PHP, Rust
- **Frameworks:** Express, NestJS, FastAPI, Gin, Laravel
- **Protocols:** REST, GraphQL, gRPC, WebSocket, MQTT
- **Tools:** Postman, Swagger, Docker, Kubernetes
- **Databases:** PostgreSQL, MongoDB, Redis

## Benefits

- **Scalability:** Built to handle growing traffic and data
- **Performance:** Optimized for speed and efficiency
- **Security:** Industry-standard security practices
- **Documentation:** Clear, comprehensive API documentation
- **Reliability:** Robust error handling and monitoring
- **Developer-Friendly:** Easy to integrate and use

Contact us to discuss your API development needs and modernize your application architecture.