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API Development &
Integration Solutions by Nextzela

At

Nextzela,

we

architect

and

implement

robust

API

solutions

that

power

modern

digital

ecosystems.

Our

API

development

expertise

enables

seamless

integration

between

applications,

systems,

and

third-party

services,

creating

unified

experiences

that

drive

business

growth.

From

RESTful

APIs

to

GraphQL

implementations,

we

build

secure,

scalable,

and

well-documented

APIs

that

serve

as

the

backbone

of

your

digital

transformation

journey.

Why APIs Are Critical
For Modern Business

Key Benefits of
API Development & Integration

Seamless System Connectivity

Connect disparate systems, applications, and databases through standardized API interfaces

Real-Time Data Synchronization

Enable instant data exchange and updates across multiple platforms and services

Enhanced Business Intelligence

Aggregate data from multiple sources for comprehensive analytics and insights

Enterprise-Grade Security

Implement OAuth 2.0, JWT tokens, and API key management for secure data exchange

Scalable Architecture

Build APIs that handle millions of requests with auto-scaling and load balancing

Accelerated Development

Reduce development time by 60% through reusable API components and microservices

Cost-Effective Integration

Lower operational costs by eliminating manual data entry and duplicate processes

Automated Workflows

Create intelligent workflows that trigger actions across integrated systems automatically

Omnichannel Experiences

Deliver consistent data and functionality across web, mobile, and IoT devices

Regulatory Compliance

Ensure GDPR, HIPAA, and industry-specific compliance through secure API design

Get Started Today

API Development &
Integration Services

RESTful API Development

Design and develop scalable REST APIs following industry best practices and standards

  • OpenAPI Specification
  • CRUD Operations
  • Pagination & Filtering
  • Version Management
  • Rate Limiting

GraphQL API Development

Build flexible GraphQL APIs for efficient data fetching with precise query control

  • Schema Design
  • Query Optimization
  • Subscription Support
  • Apollo Integration
  • Federation Architecture

Third-Party API Integration

Seamlessly integrate payment gateways, CRMs, ERPs, and cloud services into your applications

  • Payment Gateway APIs
  • Social Media APIs
  • Cloud Service Integration
  • CRM/ERP Systems
  • Analytics Platforms

Microservices Architecture

Design and implement microservices-based architectures for scalable enterprise solutions

  • Service Decomposition
  • API Gateway Setup
  • Service Mesh
  • Container Orchestration
  • Event-Driven Architecture

Webhook Development

Create real-time event-driven integrations with webhook implementations and management

  • Event Triggers
  • Payload Management
  • Retry Mechanisms
  • Security Validation
  • Event Logging

API Gateway Implementation

Deploy API gateways for centralized management, security, and monitoring of APIs

  • Request Routing
  • Authentication
  • Rate Limiting
  • Caching Strategies
  • Analytics & Monitoring

API Security & Authentication

Implement robust security measures including OAuth, JWT, and API key management

  • OAuth 2.0 Implementation
  • JWT Authentication
  • API Key Management
  • SSL/TLS Encryption
  • CORS Configuration

API Documentation & Testing

Comprehensive API documentation with interactive testing environments and SDKs

  • Swagger/OpenAPI Docs
  • Postman Collections
  • SDK Generation
  • Automated Testing
  • Mock Servers

Legacy System Integration

Modernize legacy systems with API wrappers and middleware solutions

  • SOAP to REST
  • Database APIs
  • File System Integration
  • Mainframe Connectivity
  • Data Migration

Why Choose Nextzela for
API Development & Integration

API Architecture Experts

API Architecture Experts

Certified architects design scalable, maintainable API solutions following REST and GraphQL best practices

Security-First Development

Security-First Development

Implementation of OAuth 2.0, JWT, rate limiting, and encryption for bulletproof API security

Performance Optimization

Performance Optimization

Sub-100ms response times through caching, query optimization, and efficient data structures

Comprehensive Documentation

Comprehensive Documentation

Interactive API documentation with Swagger/OpenAPI, code examples, and SDKs

Monitoring & Analytics

Monitoring & Analytics

Real-time API monitoring, performance metrics, and usage analytics dashboards

Integration Expertise

Integration Expertise

Proven experience integrating 500+ third-party APIs and enterprise systems

Scalability Guaranteed

Scalability Guaranteed

APIs designed to handle millions of requests with auto-scaling and load balancing

Versioning Strategy

Versioning Strategy

Backward-compatible API versioning ensuring smooth transitions and updates

Testing & Quality Assurance

Testing & Quality Assurance

Automated testing suites with 99.9% uptime SLA and comprehensive error handling

24/7 Support & Maintenance

24/7 Support & Maintenance

Round-the-clock monitoring, incident response, and proactive maintenance services

Schedule a Free Consultation

Transform Your Business with
Powerful API Solutions

Ready to unlock the full potential of your digital ecosystem? Partner with Nextzela to build robust APIs that connect your systems, streamline operations, and accelerate growth. Our expert team delivers secure, scalable API solutions that transform how your business operates, integrates, and innovates. From RESTful APIs to complex microservices architectures, we create the digital bridges that power modern enterprises. Get your free API consultation today - call (+94) 76-7274-081 or connect with our integration specialists to discuss your requirements.

hello@nextzelatech.com

Email

(+94) 76 727 4081

Mobile Number

hello@nextzela.lk

Email

Start Your API Project

Our API Development
Technology Stack

API Development Frameworks:(7)

Node.js & Express
Node.js & Express
FastAPI
FastAPI
.NET Core Web API
.NET Core Web API
Spring Boot
Spring Boot
Django REST Framework
Django REST Framework
GraphQL
GraphQL
NestJS
NestJS

API Gateway & Management:(7)

Kong Gateway
Kong Gateway
AWS API Gateway
AWS API Gateway
Azure API Management
Azure API Management
Apigee
Apigee
MuleSoft
MuleSoft
Tyk
Tyk
Zuul
Zuul

Authentication & Security:(7)

OAuth 2.0
OAuth 2.0
JWT
JWT
Auth0
Auth0
Okta
Okta
Keycloak
Keycloak
API Key Management
API Key Management
SSL/TLS Encryption
SSL/TLS Encryption

Database & Data Management:(7)

PostgreSQL
PostgreSQL
MongoDB
MongoDB
Redis
Redis
Elasticsearch
Elasticsearch
Apache Kafka
Apache Kafka
RabbitMQ
RabbitMQ
GraphQL Subscriptions
GraphQL Subscriptions

Testing & Documentation:(6)

Swagger/OpenAPI
Swagger/OpenAPI
Postman
Postman
Insomnia
Insomnia
Jest
Jest
Newman
Newman
Pact
Pact

Monitoring & Analytics:(6)

Datadog
Datadog
New Relic
New Relic
Prometheus
Prometheus
Grafana
Grafana
Elastic APM
Elastic APM
Sentry
Sentry

Explore our comprehensive technology stack across different categories

We

work

with

customers

from

Europe,

the

United

States,

Canada,

Australia

and

other

countries.

Let's work together

API Development &
Integration FAQs

We develop comprehensive API solutions including:
• RESTful APIs - Standard HTTP-based APIs for web and mobile applications
• GraphQL APIs - Flexible query language for efficient data fetching
• WebSocket APIs - Real-time bidirectional communication
• gRPC APIs - High-performance RPC framework for microservices
• SOAP Web Services - Legacy system integration and enterprise solutions
• Webhook APIs - Event-driven integrations for real-time updates
• Serverless APIs - Cloud-native functions for scalable solutions

Our multi-layered security approach includes:
• OAuth 2.0 and OpenID Connect implementation
• JWT token-based authentication and authorization
• API key management and rotation policies
• Rate limiting and DDoS protection
• SSL/TLS encryption for data in transit
• Input validation and SQL injection prevention
• CORS configuration and IP whitelisting
• Regular security audits and penetration testing

We integrate with 500+ popular services including:
• Payment Gateways - Stripe, PayPal, Square, Razorpay
• CRM Systems - Salesforce, HubSpot, Zoho, Pipedrive
• Cloud Services - AWS, Azure, Google Cloud, DigitalOcean
• Communication - Twilio, SendGrid, Mailchimp, Slack
• Analytics - Google Analytics, Mixpanel, Segment
• Social Media - Facebook, Twitter, LinkedIn, Instagram APIs
• ERP Systems - SAP, Oracle, Microsoft Dynamics

Our versioning strategy ensures smooth transitions:
• Semantic versioning (major.minor.patch) for clear communication
• URL-based versioning (/v1/, /v2/) for REST APIs
• Header-based versioning for cleaner URLs
• Backward compatibility maintenance
• Deprecation notices with migration timelines
• Comprehensive changelog documentation
• Automated migration tools and scripts
• Parallel version support during transition periods

We optimize API performance through:
• Response time optimization (sub-100ms targets)
• Database query optimization and indexing
• Redis/Memcached caching implementation
• CDN integration for global distribution
• Pagination and data filtering strategies
• Compression (gzip/brotli) for reduced payload
• Connection pooling and resource management
• Load testing and performance benchmarking

Comprehensive documentation and support includes:
• Interactive API documentation with Swagger/OpenAPI
• Code examples in multiple programming languages
• SDK generation for popular platforms
• Postman collections for testing
• Video tutorials and integration guides
• Developer portal with sandbox environment
• 24/7 monitoring and support
• Regular updates and maintenance

Our microservices expertise covers:
• Service decomposition and boundary definition
• API gateway implementation (Kong, Zuul)
• Service mesh deployment (Istio, Linkerd)
• Container orchestration with Kubernetes
• Event-driven architecture with message queues
• Circuit breaker patterns for resilience
• Distributed tracing and monitoring
• Service discovery and load balancing

Comprehensive testing methodology includes:
• Unit testing for individual endpoints
• Integration testing for system interactions
• Contract testing between services
• Load testing for performance validation
• Security testing and vulnerability scanning
• Automated regression testing
• Mock server creation for development
• Continuous testing in CI/CD pipelines

Legacy modernization services include:
• API wrapper creation for legacy systems
• SOAP to REST API conversion
• Database API layer implementation
• Mainframe integration via APIs
• Gradual migration strategies
• Data synchronization between old and new systems
• Middleware development for compatibility
• Training for internal teams on new architecture

Real-time monitoring and analytics include:
• API uptime monitoring (99.9% SLA)
• Response time and latency tracking
• Error rate monitoring and alerting
• Usage analytics and rate limit tracking
• Geographic distribution analysis
• Custom dashboards with Grafana/Datadog
• Automated incident response
• Monthly performance reports and recommendations

How to Reach Us

info@nextzelatech.com

Email

(+94) 76 727 4081

Mobile Number

hello@nextzela.lk

Email

www.nextzelatech.com

Website

hello@nextzelatech.com

For Business Related

www.nextzela.lk

Website

Become a Valued Partner Today