Nexbyt API Engineering

Build APIs That Scale

Enterprise-grade API design patterns and best practices that power millions of requests per day across global infrastructure.

NEXBYT

Nexbyt Technology: API-First Architecture

We design and build scalable, resilient APIs that form the backbone of modern enterprise applications. Our API-first approach ensures that every service is designed with performance, security, and developer experience in mind.

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Design First

Using OpenAPI/Swagger specifications to collaboratively design APIs before implementation, ensuring consistency and documentation.

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Performance Optimized

Caching strategies, connection pooling, database indexing, and response compression for sub-50ms response times.

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Versioning Strategy

Semantic versioning with backward compatibility guarantees and graceful deprecation policies.

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Observability

Comprehensive logging, distributed tracing, and metrics collection for every API endpoint.

REST vs GraphQL: Choosing the Right Approach

Both paradigms have their strengths. We help you choose the right architecture for your specific use case.

REST API

Resource-based architectural style using HTTP methods

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Caching Built-in

HTTP caching mechanisms reduce server load and improve response times.

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Standardized Status Codes

Clear semantics for success, error, and redirect responses.

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Simple & Predictable

Resource-based URLs make API self-documenting and easy to understand.

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Over-fetching / Under-fetching

May return more or less data than needed, requiring multiple requests.

Best for:

Public APIs Simple CRUD operations Mobile apps with low bandwidth Caching-heavy workloads

GraphQL

Query language that enables clients to request exactly what they need

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Precise Data Fetching

Clients specify exactly which fields they need, eliminating over-fetching.

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Single Endpoint

All requests go to one endpoint, simplifying client integration.

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Strong Type System

Schema defines available types and operations with automatic validation.

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Complexity Management

Nested queries can cause performance issues without proper depth limiting.

Best for:

Complex data relationships Mobile apps with varying screens Real-time subscriptions Internal microservices

Our Recommendation

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Use REST when:

Building public APIs, simple apps, or when caching is critical

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Use GraphQL when:

Complex data relationships, mobile apps with varying UI needs

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Use Both when:

REST for simple resources, GraphQL for complex aggregations

Enterprise Authentication

Multiple authentication methods to suit different security requirements and integration scenarios.

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API Keys

Simple, revocable keys for server-to-server integration and internal services.

Header X-API-Key: your-api-key-here
Query ?api_key=your-api-key-here

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OAuth 2.0 / OpenID Connect

Industry standard for delegated authorization with support for multiple grant types.

Bearer Token Authorization: Bearer <token>
Grant Types Authorization Code, Client Credentials, PKCE

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JWT (JSON Web Tokens)

Stateless, self-contained tokens for distributed systems and microservices.

Structure header.payload.signature
Algorithm RS256 / HS256

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Mutual TLS (mTLS)

Highest security for B2B integrations and regulated environments.

Security Level Mutual Certificate Validation
Use Case Financial Services, Healthcare

Intelligent Rate Limiting

Protect your API infrastructure while ensuring fair usage and optimal performance for all clients.

Token Bucket

Allows bursts of traffic while maintaining average rate limit. Perfect for APIs with variable usage patterns.

Rate: 1000 requests per minute
Burst: 200 requests

Sliding Window

More accurate than fixed windows, prevents boundary conditions where limits reset.

Window: 60 seconds
Limit: 600 requests

Leaky Bucket

Smooths out traffic spikes, processing requests at a constant rate.

Processing Rate: 10 req/sec
Queue Size: 100

Dynamic / Adaptive

Adjusts limits based on system load and client historical behavior.

Base: 1000 req/min
Dynamic: ±20% based on server load

Rate Limit Headers & Responses

Standard HTTP headers we include with every API response:

X-RateLimit-Limit: 1000
X-RateLimit-Remaining: 842
X-RateLimit-Reset: 1609459200
Retry-After: 120

When limit exceeded (HTTP 429):

{
  "error": "rate_limit_exceeded",
  "message": "Rate limit exceeded. Try again in 120 seconds.",
  "retry_after": 120
}

Our API Best Practices

Proven patterns we implement to ensure APIs are scalable, maintainable, and developer-friendly.

Semantic Versioning

MAJOR.MINOR.PATCH format with clear upgrade paths and deprecation windows.

Comprehensive Documentation

Interactive API docs with request/response examples and SDKs in multiple languages.

Error Handling Standards

Consistent error responses with codes, messages, and resolution guidance.

Request Validation

Strict input validation with clear error messages for invalid requests.

Response Compression

Gzip/Brotli compression for reduced bandwidth and faster responses.

Pagination & Filtering

Cursor-based pagination for large datasets with comprehensive filtering options.

Ready to Build Your Scalable API?

Let Nexbyt Technology help you design, build, and deploy enterprise-grade APIs that power your digital transformation.

Request API Consultation