Services

API Development and System Integration

REST and GraphQL APIs and the integrations that let your systems share data automatically.

Discuss your project

An API (application programming interface) is how one piece of software talks to another. API development means designing and building those interfaces; system integration means using them so your applications share data automatically instead of people copying it between screens.

Mohteknologies builds well-documented REST and GraphQL APIs for web and mobile apps and partners, and integrates business systems such as accounting, CRM, payment and logistics platforms.

Problems we solve

  • Staff re-entering the same data in several systems
  • Partners or customers asking for an API to connect to your platform
  • Fragile integrations that fail silently
  • A legacy system that needs to connect to modern applications

Who it's for

  • Businesses running several systems that don't talk to each other
  • Platforms that need to offer an API to partners
  • Teams building mobile apps that need a reliable back end

Why work with us on api development & integration

Clear contracts

APIs documented with OpenAPI or GraphQL schemas so other teams can build against them.

Reliable integrations

Retries, idempotency and alerts so failures are caught and recovered.

Versioned and stable

Changes are versioned so existing consumers don't break.

How we deliver

Every engagement follows our development process, adapted to the work involved.

  1. 01

    Integration mapping

    We document which systems hold which data, what needs to sync, and how often.

  2. 02

    API design

    Resources, authentication and error handling agreed before implementation.

  3. 03

    Build and test

    Automated tests, including contract tests against third-party sandboxes.

  4. 04

    Monitoring

    Logging, alerts and dashboards for integration health.

  5. 05

    Launch and support

    We deploy to production, set up monitoring and hand over documentation. After launch we stay on for bug fixes, improvements and new features under a support arrangement that suits you.

Technologies

  • Node.js
  • TypeScript
  • Python
  • GraphQL
  • REST / OpenAPI
  • PostgreSQL
  • Message queues
  • AWS

Integrations

  • Payment gateways
  • Accounting and ERP systems
  • CRM platforms
  • Courier and logistics APIs
  • Identity providers
  • Legacy databases and file-based exchanges

Security considerations

  • OAuth 2.0, API keys or signed requests depending on the consumer
  • Rate limiting, input validation and least-privilege access
  • Encrypted transport and secrets management

Performance and reliability

  • Pagination, caching and efficient queries for high-volume endpoints
  • Asynchronous processing for long-running operations

API Development & Integration: frequently asked questions

What is API development?

It is designing and building the interfaces that allow different software systems to exchange data and trigger actions in a controlled, secure way.

REST or GraphQL?

REST is simple and widely supported, which suits most integrations. GraphQL suits apps that need flexible queries across related data. We recommend based on your consumers.

Can you integrate a system that has no API?

Often, yes, through database access, file exports, email parsing or scheduled imports. We assess the safest option during discovery.

Related services

Further reading

Let's talk about what you're building

Whether you have a detailed spec or a rough idea, we'd like to hear about it. Book a free 30-minute discovery call and get an honest view of the right approach.

Contact our software development team