REST & GraphQL APIs for Web & Mobile Backends
We architect production-grade APIs that power web applications, mobile apps, and third-party integrations. Expert delivery across Laravel, .NET Web API, Next.js API Routes, and Symfony — with comprehensive documentation, rate limiting, versioning, and webhook support built in from day one.
0
APIs Deployed
99.9%
API Uptime SLA
<50ms
Avg. Response Time
The Backbone of Every Modern Digital Product
APIs are the connective tissue between your front-end experiences, mobile applications, partner integrations, and internal systems. A well-designed API accelerates development, enables ecosystem growth, and scales independently of your user interface. A poorly designed one creates bottlenecks, security holes, and mounting technical debt.
XtremeDevelop specializes in building APIs that serve both web and mobile clients from a single, authoritative backend. We follow API-first design principles — defining contracts before implementation, versioning from the start, and documenting every endpoint with OpenAPI specifications. Whether you need a greenfield microservice or a modernization of legacy SOAP endpoints, our engineers deliver APIs your teams and partners will actually enjoy consuming.
API Solutions We Deliver
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RESTful API Services
Resource-oriented endpoints with proper HTTP semantics, HATEOAS where appropriate, pagination, filtering, and consistent error response formats.
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GraphQL APIs
Flexible query layers with schema stitching, DataLoader batching, subscription support, and playground documentation for front-end and mobile teams.
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Mobile-Optimized Backends
Lightweight payloads, token-based auth, push notification triggers, offline sync endpoints, and bandwidth-conscious response compression.
Key API Development Capabilities
Enterprise-grade features that make your APIs secure, scalable, and developer-friendly.
OpenAPI / Swagger Documentation
Auto-generated, always-current API documentation with interactive Swagger UI, code samples in multiple languages, and SDK generation for partner onboarding.
Rate Limiting & Throttling
Per-client, per-endpoint, and tiered rate limits with Redis-backed counters, graceful 429 responses, and quota dashboards for API consumers.
API Versioning
URL path, header, and content negotiation versioning strategies with deprecation timelines, migration guides, and backward compatibility guarantees.
Webhook Integrations
Event-driven webhook delivery with retry logic, HMAC signature verification, delivery logs, and subscriber management portals for third-party integrations.
Authentication & Authorization
OAuth 2.0, JWT, API keys, Sanctum tokens, and Passport flows with role-based access control, scope management, and token refresh strategies.
Automated API Testing
Contract testing with Postman/Newman, integration test suites, load testing with k6, and CI/CD gates that block deployments on breaking changes.
Laravel API Development
Laravel remains one of the most productive frameworks for building robust REST APIs. Our Laravel specialists leverage the full ecosystem to deliver APIs that are elegant, testable, and production-hardened from the first commit.
- Laravel Sanctum — SPA authentication, mobile token management, and API token abilities with fine-grained scope control.
- Laravel Passport — Full OAuth 2.0 server implementation for third-party application authorization and client credential flows.
- Eloquent ORM — Optimized queries with eager loading, API resources for response transformation, and database migration management.
- Queue Workers — Redis and database-backed job queues for async processing, webhook dispatch, email notifications, and report generation.
Laravel API Stack
Ideal for rapid MVP development, SaaS backends, and teams already invested in the PHP ecosystem. Laravel APIs integrate seamlessly with Vue/React front-ends and Flutter/React Native mobile clients.
.NET Web API Stack
Perfect for enterprise environments, financial services, healthcare, and organizations with existing Microsoft infrastructure investments requiring compliance and governance.
.NET Web API Development
For enterprise-grade performance, type safety, and Azure-native deployment, ASP.NET Core Web API is our framework of choice. We build high-throughput APIs that handle millions of requests with minimal latency.
- ASP.NET Core — Minimal APIs and controller-based architectures with middleware pipelines, dependency injection, and built-in health checks.
- Entity Framework Core — Code-first migrations, LINQ queries, change tracking, and database provider flexibility across SQL Server, PostgreSQL, and Cosmos DB.
- Azure Integration — App Service, Azure Functions, API Management, Key Vault, Application Insights, and managed identity authentication.
- Identity & Security — ASP.NET Core Identity, Azure AD B2C, certificate-based auth, and policy-based authorization with custom requirement handlers.
Next.js API Routes Development
When your front-end and API live in the same repository, Next.js API Routes and Server Actions deliver unparalleled developer velocity. We build full-stack TypeScript applications with colocated backend logic, edge deployment, and type-safe client-server contracts.
- API Routes & Route Handlers — RESTful endpoints in the App Router with middleware, request validation, and streaming response support.
- Server Actions — Type-safe server mutations called directly from React components without boilerplate API client code.
- tRPC Integration — End-to-end type safety with automatic TypeScript inference from server procedures to client hooks.
- Edge Functions — Globally distributed API logic on Vercel Edge Runtime and Cloudflare Workers for sub-50ms response times worldwide.
Next.js API Stack
Best suited for startups, SaaS products, and teams prioritizing rapid iteration with a unified TypeScript codebase serving both web and mobile via shared API contracts.
Symfony API Stack
The go-to choice for European enterprises, complex domain-driven designs, and projects requiring strict architectural patterns with long-term maintainability.
Symfony API Development
Symfony's maturity and API Platform bundle make it a powerhouse for enterprise API development. We leverage its component architecture to build APIs with clean separation of concerns, comprehensive validation, and auto-generated documentation.
- API Platform — Auto-generated CRUD operations, GraphQL and REST support, hypermedia formats, and data persisters with custom business logic hooks.
- Doctrine ORM — Advanced entity mapping, DQL queries, event listeners, and multi-database support with migration versioning.
- JWT Authentication — LexikJWTAuthenticationBundle with refresh tokens, role hierarchies, and voter-based authorization for fine-grained access control.
- Symfony Messenger — Async message handling, event sourcing patterns, and integration with RabbitMQ, Amazon SQS, and Redis transports.
Production API Infrastructure
Beyond framework selection — the operational excellence that keeps APIs reliable at scale.
API Documentation (Swagger / OpenAPI)
Every API we deliver ships with comprehensive OpenAPI 3.0 specifications. Interactive Swagger UI lets your developers and partners explore endpoints, test requests, and understand response schemas without reading source code. We maintain documentation as code — specs are generated from annotations or schema definitions and validated in CI pipelines to prevent documentation drift.
- Auto-generated client SDKs (TypeScript, Python, PHP, C#)
- Changelog tracking between API versions
- Postman collection export for QA teams
Rate Limiting & API Governance
Protect your infrastructure from abuse and ensure fair resource allocation across API consumers. We implement multi-layer rate limiting — global, per-API-key, and per-endpoint — with configurable windows, burst allowances, and tiered quotas for free vs. premium plans. Rate limit headers (X-RateLimit-Remaining, Retry-After) follow industry standards for transparent client behavior.
- Redis-backed sliding window counters
- API gateway integration (Kong, AWS API Gateway)
- Usage analytics dashboards for billing
API Versioning Strategy
APIs evolve — your versioning strategy determines whether evolution helps or hurts your consumers. We design versioning from day one with clear deprecation policies, sunset timelines, and migration tooling. Support for URL-based (/v1/, /v2/), header-based (Accept-Version), and content-type negotiation ensures backward compatibility while enabling breaking improvements.
- Semantic versioning aligned with release cycles
- Automated breaking change detection in CI
- Consumer migration guides and dual-running periods
Webhook Integrations
Enable real-time event notifications for your partners and internal systems. Our webhook infrastructure handles event registration, payload serialization, delivery with exponential backoff retries, dead letter queues, and HMAC-SHA256 signature verification. Subscribers receive a developer portal to manage endpoints, view delivery logs, and replay failed events.
- Idempotent event delivery with deduplication
- Configurable retry policies (3x, 5x, custom)
- Webhook testing sandbox for integration partners
Our Full API Technology Stack
Frameworks, databases, and infrastructure tools powering our API delivery.
Our 4-Step API Delivery Process
API-first methodology that defines contracts before a single line of backend code is written.
API Design & Spec
OpenAPI specification drafting, endpoint modeling, authentication scheme selection, and stakeholder review before implementation begins.
Core Development
Framework implementation with TDD approach, database schema design, authentication middleware, and integration test suites from sprint one.
Hardening & Docs
Rate limiting, versioning setup, Swagger documentation, load testing, security audit, and webhook infrastructure configuration.
Deploy & Monitor
Production deployment with API gateway configuration, monitoring dashboards, alerting rules, and developer onboarding sessions for your team.
Why Partner With XtremeDevelop
Multi-framework API expertise that matches the right technology to your requirements.
Framework Agnostic
We recommend Laravel, .NET, Next.js, or Symfony based on your team's skills, compliance needs, and performance requirements — not our preferences.
Web + Mobile Ready
Every API is designed to serve both web front-ends and mobile apps from a single backend — reducing duplication and ensuring data consistency.
Built for Longevity
Versioned, documented, and tested APIs with clear ownership handoff — your team or partners can integrate confidently for years to come.
Related Services
Complete your API ecosystem with complementary expertise.
Ready to Build Your API?
Whether you need a Laravel API with Sanctum auth, a .NET microservice on Azure, Next.js API Routes with tRPC, or a Symfony API Platform backend — tell us your requirements and we will architect the right solution.