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API Gateway & Microservices Engineering

Enterprise API & Microservices Engineering

We design, build, and secure high-throughput RESTful, GraphQL, and gRPC API ecosystems, connecting enterprise applications, cloud microservices, third-party SaaS, and real-time WebSockets.

API SLA & Performance Metrics

API Response LatencyOptimized query execution & Redis caching
Sub-10ms
Daily API Requests HandledProven high-concurrency microservice throughput
10M+
API Gateway Uptime SLAResilient multi-region cloud deployment
99.999%
OpenAPI & OAuth 2.0 CompliantZero-trust security & standardized contracts
100%
API Architectures

Purpose-Built Integration Solutions

Tailored API engineering for microservices, payment processing, SaaS integrations, and event streams.

Enterprise Microservice Backbones

Decouple legacy monoliths into high-speed gRPC & REST microservices with automated service discovery.

Discuss Enterprise Scope

FinTech & Payment Gateway APIs

Secure Stripe, M-Pesa, Plaid, & banking API integrations with tokenized credentials and PCI compliance.

Discuss FinTech Scope

Third-Party Enterprise SaaS Connectors

Seamless bi-directional synchronization with Salesforce, HubSpot, SAP, NetSuite, & custom ERPs.

Discuss Third-Party Scope

Real-Time WebSockets & Event Streams

Event-driven Kafka & WebSocket architectures for instant chat, live tracking, and telemetry dashboards.

Discuss Real-Time Scope

Public Developer API Portals

Monetizable developer portals, SDK generators, API key management, rate-limiting, and interactive docs.

Discuss Public Scope

Legacy Middleware Modernization

Refactor fragile SOAP / XML legacy services into lightweight, high-performance JSON REST and GraphQL APIs.

Discuss Legacy Scope
Core Capabilities

API Engineering Practice

From RESTful OpenAPI specs to GraphQL federation, gRPC microservices, and OAuth 2.0 security.

Standardized Specs

RESTful & OpenAPI Contract Specs

We design clean, versioned RESTful APIs (v1/v2) adhering strictly to OpenAPI 3.0 specifications. Complete with interactive Swagger documentation, standardized JSON response schemas, and error handling.

Key Architectural Specifications
OpenAPI 3.0 / Swagger specification modeling
RESTful URI resource design & HTTP status code discipline
Automated request/response payload schema validation
API versioning strategies (URL path, query, header)

API SLA Delivery Standards

  • Sub-10ms response latency & Redis caching
  • OAuth 2.0, OIDC, JWT, & HMAC signature security
  • Kong / AWS API Gateway rate-limiting & DDoS shielding
  • 100% intellectual property & OpenAPI spec ownership
API Execution Lifecycle

How We Engineer APIs

A contract-first, test-driven engineering lifecycle from OpenAPI design to production gateway deployment.

01

API Domain Modeling & Contract Specs

We model resource entities and write clear OpenAPI 3.0 / Protobuf contract specs before writing business logic.

02

Security & OAuth2 Auth Design

Define access control roles (RBAC), OAuth 2.0 scopes, rate-limiting rules, and token validation specs.

03

Microservice & Database Endpoint Coding

Agile 2-week sprint development building high-concurrency Node.js, Go, or Python FastAPI endpoints with Redis caching.

04

k6 Load Testing & Benchmarking

Rigorous automated load testing using k6 and Postman to verify sub-10ms response latency under heavy concurrency.

05

API Gateway & CI/CD Deployment

Deploy containerized APIs to Kubernetes or AWS with Kong Gateway routing and automated deployment pipelines.

06

Developer Portal & Telemetry SLA

Publish interactive Swagger documentation, configure Sentry error tracking, and provide 24/7 APM monitoring.

Technology Stack

Enterprise API Tech Stack

RESTful JSONGraphQLgRPCWebSocketsOpenAPI 3.0Protocol BuffersSSE
Client Advisory & FAQs

API Engineering FAQ

Answers to common questions regarding REST vs GraphQL vs gRPC, rate-limiting, and webhook delivery retries.

REST is ideal for public developer APIs and standard CRUD web services due to universal client compatibility. GraphQL is superior for complex web/mobile apps where clients require flexible queries without over-fetching. gRPC (Protocol Buffers) is recommended for internal microservice-to-microservice communication where sub-5ms low latency and high binary throughput are critical.

Interconnected Capabilities

Explore Related Practice Areas

Discover interconnected engineering capabilities, strategy practices, and cloud solutions.

Custom Architecture

Software Development

Bespoke enterprise software applications built for performance, security, and scalability.

Explore Software
PostgreSQL & SQL

Database Development

High-availability database architecture, indexing, partitioning, and zero-downtime migrations.

Explore Database
CI/CD & Terraform

DevOps Consulting

Automate CI/CD pipelines, Kubernetes container orchestration, and Infrastructure as Code.

Explore DevOps
Legacy Refactoring

Software Modernization

Refactor monolithic codebases into cloud-native microservices with zero business downtime.

Explore Software
Rapid Prototyping

MVP Development

Fast-track product launches with high-velocity 6-12 week Minimum Viable Product engineering.

Explore MVP
Next.js 15 & React

Web Development

High-performance Next.js 15 web applications engineered for speed, SEO, and user conversion.

Explore Web
Related Industry Solution Blueprints:
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Direct Advisory Contact

Direct Hotline
+254 0181 742 815
Email Inquiry
info@azarous.co.ke
Headquarters
Nairobi, Kenya
RAPID RESPONSE GUARANTEE

NDA & Proposal within 24 Hours

All client project briefs are protected under strict mutual Non-Disclosure Agreements (NDA) prior to technical architectural review.