CONNECTED INTEGRATION ARCHITECTURE

API Development

Well-structured APIs that connect products, platforms, internal systems and third-party services securely.

Engineered with type-safe contracts (OpenAPI/gRPC), token-bucket rate limiting, sub-50ms p99 latencies, and self-documenting developer portals.

RESTGraphQLWebhooksAuthVersioningIntegrations
Enterprise API Gateway & Mesh

REST · GRAPHQL · WEBHOOKS · REVERSE PROXY · ZERO-TRUST AUTH

OpenAPI 3.1 Validated
FLOW: CLIENTS → GATEWAY → MICROSERVICES → EXTERNAL SYSTEMS
Bidirectional mTLS 1.3
Stage 1
Consumers
Web, iOS, SDKs
OriginREST / GQL
Stage 2
API Gateway
Rate Limit + JWT
Validation0.9ms
Stage 3
Core Services
Billing & Sync
Service Mesh3.4ms
Stage 4
External APIs
Stripe, ERP, AI
Circuit BreakerClosed (OK)
Transaction Trace ID: trc_81a49f92Timing / Protocol
POST /v1/integrations/settlement/sync201 CREATED · 18.2ms total
Auth: Bearer JWT (RS256 verified) · Rate: 42/1000 burstIdempotency: key_59b3 (Cached)
Fully Idempotent EndpointsCircuit Breakers & Auto-Retry Active
< 15msGateway Overhead
100% Type-SafeContract Verified
99.99%Integration SLA
SemVerZero-Break Versions

SYSTEM CAPABILITIES

Production Capabilities

Engineered for contract-first design, zero-trust token authentication, resilient third-party integrations, idempotent event pipelines, and sub-15ms gateway latencies.

FOUNDATIONAL STRATEGY

Questions to answer before you build.

Essential API architecture decisions that govern protocol selection, zero-trust authorization, non-breaking version evolution, and external dependency resilience.

The optimal API interface depends on your data consumption patterns and who the API serves. REST remains the industry standard for public partner APIs and standard CRUD operations because of its universal client compatibility, intuitive HTTP semantics, and seamless HTTP caching at the edge. GraphQL shines for complex frontends (such as multi-screen web and mobile apps) where clients need to query deeply nested relational data in a single round-trip without over-fetching or under-fetching. For high-throughput internal microservice communication where serialization performance is paramount, gRPC over HTTP/2 delivers up to 7x faster data transfers using binary protocol buffers.

Strategic Considerations:
  • Choose REST for public developer ecosystems and partner integrations requiring standard HTTP tools.
  • Choose GraphQL when mobile and web clients have divergent data requirements and need flexible queries.
  • Deploy gRPC behind the API gateway for inter-service communication to minimize CPU overhead and serialization lag.

DISCIPLINED EXECUTION

How We Build APIs

From formal contract specification and zero-trust authentication to asynchronous webhook workers and consumer-driven contract testing.

Contract Design & Schema Modeling

We design clear domain entities, data validation contracts, idempotent resource interfaces, and interactive OpenAPI 3.1 / GraphQL schemas before writing implementation code.

Key Outputs:
OpenAPI 3.1 contract specification
Entity-relationship and payload schemas
Error code taxonomy & HTTP status mapping

Gateway, Auth & Service Implementation

We engineer high-performance API routes, OAuth2 / API key middleware, rate limiters, database query optimizers, and automated schema validation pipelines.

Key Outputs:
Modular API service codebase (TypeScript / Go / Python)
Zero-trust authentication & RBAC middleware
Automated unit and integration test suites

Integration Bridges & Asynchronous Webhooks

We construct defensive third-party connectors with circuit breakers, webhook ingestion engines with HMAC verification, and persistent background job queues.

Key Outputs:
Decoupled third-party service adapters
Idempotent webhook receiver & DLQ setup
Automated retry and backoff worker pools

Contract Testing, Telemetry & Developer Portal

We run consumer-driven contract test suites, configure distributed tracing (OpenTelemetry), and publish an interactive developer portal with automated client SDKs.

Key Outputs:
Interactive developer portal (Redoc / Swagger)
Consumer-driven contract test pipeline (Pact)
OpenTelemetry distributed tracing dashboards

FOUNDATIONAL VALUE

Why Build Strong APIs

APIs are the connective tissue of your business—governing data flow, partner connectivity, client application performance, and operational security.

DEVELOPER EXPERIENCE

Predictable Integration Contracts

Strictly typed schemas, consistent HTTP status codes, and deterministic error formats allow frontend teams and partner developers to integrate seamlessly without guesswork.

PROTECTION

Zero-Trust Gateway Security

Centralized token validation, scoped permission matrices, and token-bucket rate limiting shield your core infrastructure from unauthorized access and malicious denial-of-service.

RELIABILITY

Resilient Third-Party Fault Isolation

Circuit breakers and asynchronous job queues ensure that downtime or slowdowns in partner services (Stripe, Salesforce, AI providers) never take down your core application.

SPEED TO MARKET

Omnichannel Product Velocity

A unified API layer powers web applications, iOS/Android apps, Apple Watch companions, and external partner ecosystems from a single source of truth.

SYSTEM EVOLUTION

Seamless Legacy Modernisation

Wrap legacy databases and monolithic backends in clean, modern API facades, enabling gradual migration to microservices without disrupting live business operations.

SCALABILITY

Accelerated Developer Onboarding

Interactive documentation, runnable code samples, and automated client SDKs reduce partner integration time from weeks to hours, unlocking ecosystem growth.

BUSINESS IMPACT

Why API Development for Your Product

Delivering high engineering leverage: accelerating multi-client release velocity, isolating partner failures, and enabling self-serve developer ecosystems.

2x Faster Releases

Accelerate Cross-Team Feature Delivery

Contract-first API design allows frontend and backend teams to build concurrently against mock schemas, cutting product delivery cycles in half.

Strategic Advantage
Zero Cascading Outages

Protect Internal Systems Against Failures

Defensive architecture with circuit breakers and fallback caching isolates upstream third-party failures before they reach your customers.

Strategic Advantage
Self-Serve Integrations

Unlock High-Value Partner Ecosystems

Production-ready OpenAPI documentation, automated SDKs, and granular API key management make partner onboarding effortless and secure.

Strategic Advantage
100% Audit Telemetry

Enforce Bulletproof Data Governance

Every API request is authenticated, authorized, rate-limited, and logged with distributed tracing context to guarantee enterprise compliance.

Strategic Advantage
Zero Client Breakages

Eliminate Costly Breaking Change Disruption

Disciplined SemVer evolution and automated CI/CD schema regression testing ensure updates roll out smoothly without breaking legacy mobile versions.

Strategic Advantage

THE AKREVON STANDARD

Why AKREVON for API Development

We engineer APIs with architectural discipline, zero-trust gateway security, resilient integration bridges, and complete code ownership.

Contract-First Architectural Rigor

We design APIs with mathematical precision. Every endpoint conforms to formal OpenAPI 3.1 specifications with strict validation, clean resource hierarchies, and deterministic idempotency.

Engineered Standard

Zero-Trust Gateway Security

We treat every incoming request as potentially hostile. We implement cryptographic token verification, scoped RBAC, tenant isolation, and automated OWASP API vulnerability defense.

Engineered Standard

Resilient Fault-Tolerant Integrations

We engineer defensive integration bridges that never assume external uptime. Circuit breakers, retry queues, HMAC verification, and DLQs ensure flawless operations.

Engineered Standard

100% Code & Specification Ownership

You retain complete ownership of all API codebases, OpenAPI contracts, Docker containers, and SDK generators upon delivery. Free from proprietary vendor lock-in.

Engineered Standard

FREQUENTLY ASKED QUESTIONS

API development answers

Direct technical guidance regarding interface selection, breaking change prevention, zero-trust token security, webhook guarantees, and third-party resilience.

We evaluate this based on client requirements and architecture. REST is ideal for public developer APIs, partner ecosystems, and standard CRUD workflows due to its universal HTTP tooling and edge caching support. GraphQL is superior when multi-platform clients (web, mobile, tablet) need to request tailored, nested relational data in a single request without over-fetching or multiple round-trips. gRPC is optimal for high-throughput internal microservice-to-microservice communication where binary protocol buffers achieve 7x faster serialization speeds and low CPU overhead.

CONNECTED DIGITAL ARCHITECTURE

Build APIs that connect products and systems properly.

Partner with AKREVON to engineer well-structured, fault-tolerant APIs, zero-trust gateways, and high-velocity developer ecosystems for your product.