Build robust REST and GraphQL APIs that power your applications. Microservices architecture, API gateways, and real-time webhooks engineered for reliability at scale.
Resource-oriented design with OpenAPI spec and versioning
Flexible queries with schema-first design and subscriptions
High-performance inter-service communication with Protobuf
Async messaging with Kafka, RabbitMQ, or Redis Streams
Pay-per-use API endpoints on edge and cloud functions
End-to-end API development from design to deployment and monitoring
Design and build RESTful APIs following OpenAPI specification with versioning, pagination, filtering, and comprehensive error handling
Build flexible GraphQL APIs with schema-first design, real-time subscriptions, and optimized resolvers that eliminate over-fetching
Centralized API gateways with rate limiting, authentication, request transformation, and analytics for managing multiple services
Decompose monoliths into independently deployable microservices with service discovery, circuit breakers, and event-driven communication
Real-time event delivery with webhook management, retry logic, payload signing, and delivery guarantees for system integrations
Auto-generated, interactive API documentation with code examples, authentication guides, and SDK generation for developer onboarding
Design-first methodology for building reliable, well-documented APIs
Common questions about our API development services
REST is ideal for simple CRUD operations, public APIs, and when caching is critical. GraphQL is best for complex data relationships, mobile apps needing flexible queries, and when you want to reduce over-fetching. Builderz helps you choose based on your specific use case, and we often implement both in hybrid architectures.
API development costs depend on complexity: simple REST APIs start at $15,000-$30,000, full-featured API platforms range from $40,000-$100,000, and enterprise microservices architectures can exceed $150,000. We provide fixed-price quotes after a free technical consultation.
We implement industry-standard security including OAuth 2.0, JWT tokens, API key management, rate limiting, input validation, CORS policies, and request signing. All APIs undergo security audits before deployment, and we follow OWASP API Security Top 10 guidelines.
Yes, we build API integrations with payment processors (Stripe, PayPal), CRMs (Salesforce, HubSpot), cloud services (AWS, GCP), blockchain networks, AI services, and any system with an API. We handle authentication, rate limiting, error handling, and data mapping.
We optimize APIs through database query optimization, Redis caching, connection pooling, horizontal scaling, CDN-based edge caching, and load testing. Our APIs are designed to handle thousands of requests per second with sub-100ms response times.
Every API we build comes with interactive documentation (Swagger/GraphQL Playground), authentication guides, code examples in multiple languages, rate limit documentation, and changelog management. We can also build custom developer portals.
Absolutely. We use the Strangler Fig pattern to incrementally decompose monoliths into microservices. This approach allows zero-downtime migration, gradual team adoption, and risk mitigation. We start with the most independent bounded contexts.
We implement comprehensive observability including request logging, distributed tracing (OpenTelemetry), error tracking (Sentry), uptime monitoring, latency dashboards, and automated alerting. This gives you full visibility into API health and performance.
Get a free technical consultation with our API development team. We will help you design, build, and deploy APIs that power your applications at scale.
Free consultation · Fixed-price quotes · Interactive API documentation included
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