Sloctech - Custom Software & Web Development Company
Software Development

API Development & Integration

Secure API gateway development, third-party API connectors, automated webhook listeners, and microservice middleware.

API Development & Integration illustration

High-throughput REST/GraphQL APIs & automated webhook integration pipelines.

The Problem

Why teams come to us for api development & integration

Connect disparate software systems into a seamless digital ecosystem. Sloctech engineers robust RESTful and GraphQL APIs with OpenAPI/Swagger documentation, JWT/OAuth2 authentication, rate limiting, and automated webhook queue consumers capable of processing thousands of requests per second.

What We Build

Included in every API Development & Integration engagement

REST & GraphQL APIs

Clean resource endpoints formatted to JSON API standards with pagination.

API Gateway & Rate Limiting

Protecting backend servers against DDoS and abusive request spikes.

Webhook Engine

Asynchronous message queues (RabbitMQ / Redis) for reliable event delivery.

Legacy System Connectors

Wrapping legacy databases and SOAP services in modern REST endpoints.

Deliverables

What you receive

  • Cached data layers tuned to an agreed latency budget
  • Zero Data Loss Webhook Queue Resilience
  • Interactive Swagger / Postman API Documentation
  • Strict OAuth2 / JWT Auth Security Controls
Process

Discovery to delivery to support

  1. 01

    API Contract Specification

    Defining request/response payload schemas using OpenAPI standards.

  2. 02

    High-Speed API Build

    Engineering backend routes with prepared queries and Redis caching.

  3. 03

    Load & Edge Security Testing

    Simulating traffic spikes and validating authentication token expiry.

  4. 04

    SDK & Developer Portal Launch

    Publishing API docs and client libraries for internal or external developers.

Technology stack

The stack below is what we reach for by default on this work. We pick per project, and we will tell you plainly when your requirements point somewhere else.

Node.js Express PHP PDO Laravel Redis Swagger/OpenAPI Postman

Industries served

Sectors where we have shipped this kind of work and understand the constraints that come with them.

Fintech E-Commerce SaaS Telecom Logistics
Scope, Cost & Ownership

What drives the number on your quote

Cost factors

  • Number of distinct user roles and the permission rules between them
  • Third-party systems to integrate, and how well documented their APIs are
  • Whether existing data has to be migrated, and what condition it is in
  • Depth of custom design versus adapting an established design system
  • Compliance or audit requirements that change how we build and test

We quote after a scoping call, itemised by module, so you can see what each part costs and drop anything you do not need.

Typical timeline

Timelines follow scope, so we give you one at the end of discovery rather than before it. What we can commit to up front is the shape of the schedule:

  • Discovery and a written scope before any build work starts
  • Working software demonstrated on a fixed sprint cadence, not just at the end
  • A dated delivery plan you approve before we commit to it

What you own

  • Full copyright in the source code we write for you, assigned on final payment
  • The repository, its history, and the deployment configuration
  • Database schemas, migrations and technical documentation
  • Accounts and infrastructure registered in your name, not ours

Third-party libraries keep their own open-source licences, and any commercial component is listed in the quote before you sign.

FAQs

API Development & Integration questions we get asked

Do you provide interactive API documentation?

Yes, every API build comes with complete interactive Swagger/OpenAPI documentation and Postman collections.

How do you handle API rate limits and security?

We implement IP rate-limiting, API key throttling, CORS policy headers, and HMAC signature verification.

Talk to an Engineer

Get a quote for API Development & Integration

Tell us what you are trying to build. A senior engineer reads every request and replies with honest guidance and an itemised estimate.

Service API Development & Integration

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