YZ
Yiwu ZhenyuTrading Firm
ServicesAPI Development

APIs That Connect. Integrations That Last.

We design, build, and govern the integration layer that keeps your systems talking — reliably, securely, and without the technical debt that accumulates when integrations are patched together under pressure.

Three Core Areas

01

API Design & Development

We architect APIs that are built to last — consistent, versioned, and documented from the first endpoint. Whether REST or GraphQL, we apply strict design standards so your API is a reliable contract, not a moving target.

  • RESTful API design with OpenAPI/Swagger specification
  • GraphQL schema design and resolver architecture
  • API versioning strategy and deprecation management
  • Developer portal and interactive documentation
  • Mock APIs for parallel frontend/backend development
  • Rate limiting, pagination, and error handling standards
02

Third-Party Integration

Connecting your internal systems to the outside world — payment processors, CRMs, ERPs, logistics platforms, and dozens of other SaaS services — is where most integration projects stall. We've done it enough times to know exactly where the complexity hides.

  • Payment gateway integration (Stripe, Alipay, PayPal, WeChat Pay)
  • CRM and ERP connectors (Salesforce, SAP, NetSuite, HubSpot)
  • Logistics and shipping API integration
  • Social and communication platform connectors
  • Accounting software sync (Xero, QuickBooks)
  • Custom ETL pipelines for data exchange
03

API Gateway & Security

A well-designed API is only as strong as its governance layer. We configure and manage API gateways that enforce authentication, apply rate limits, log traffic, and enable you to control exactly who accesses what — with full audit trails.

  • API gateway setup (AWS API Gateway, Kong, Apigee)
  • OAuth 2.0 and OpenID Connect implementation
  • JWT authentication and token lifecycle management
  • IP allowlisting and abuse protection
  • Traffic monitoring, anomaly detection, and alerting
  • Secrets management and credential rotation

Use Cases

Legacy system modernisation

Wrap existing monolithic systems in clean API layers so modern applications can consume them without touching the underlying code.

Cross-border commerce integration

Connect your order management, inventory, and fulfilment systems across regional marketplaces — Lazada, Shopee, Tmall, Amazon — with a unified integration layer.

Internal microservices

Break a monolith into independently deployable services with well-defined API contracts between them, enabling faster shipping and team autonomy.

Partner data exchange

Build structured, authenticated data pipelines with suppliers, distributors, or financial partners — replacing ad-hoc file transfers and email attachments.

Mobile & web backend

Design the API backbone that powers your customer-facing apps — with the performance, reliability, and consistency those products demand.

Webhook infrastructure

Event-driven integrations that push real-time data to your partners and internal systems when things happen — without polling.

Technologies We Work With

Protocols

  • REST
  • GraphQL
  • gRPC
  • WebSocket
  • Webhook

Gateways

  • AWS API Gateway
  • Kong
  • Apigee
  • NGINX

Auth

  • OAuth 2.0
  • OpenID Connect
  • JWT
  • API Keys
  • mTLS

Languages

  • Node.js
  • Python
  • Go
  • Java
  • TypeScript

Messaging

  • RabbitMQ
  • Apache Kafka
  • AWS SQS/SNS
  • Redis Pub/Sub

Docs

  • OpenAPI 3.x
  • Swagger UI
  • Redoc
  • Postman Collections

Have an integration challenge we haven't listed?

Bring us the problem — we'll tell you honestly what's feasible, what it will take, and whether we're the right team for it.