API Development & Integration
Secure API gateway development, third-party API connectors, automated webhook listeners, and microservice middleware.
High-throughput REST/GraphQL APIs & automated webhook integration pipelines.
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.
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.
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
Discovery to delivery to support
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01
API Contract Specification
Defining request/response payload schemas using OpenAPI standards.
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02
High-Speed API Build
Engineering backend routes with prepared queries and Redis caching.
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03
Load & Edge Security Testing
Simulating traffic spikes and validating authentication token expiry.
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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.
Industries served
Sectors where we have shipped this kind of work and understand the constraints that come with them.
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.
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.
Where we have used this
Projects that included api development & integration, written up as case studies.
FinFlow Core
Developed a secure Node API backbone and MySQL banking interface running over highly optimized caching architectures.
Read the FinFlow Core case study →
LinkStorer Organizers
Developed custom REST endpoints and React state adapters to capture, categorize, and securely catalog millions of web bookmarks instantly.
Read the LinkStorer Organizers case study →More Software Development services
Teams that need api development & integration often scope one of these alongside it.
Custom Software Development
Bespoke enterprise software tailored to your complex workflow.
SaaS Platform Engineering
Multi-tenant cloud platforms engineered for recurring revenue scale.
Custom CRM Development
Tailored customer relationship platforms aligned with your sales pipeline.
Enterprise ERP Systems
Unified enterprise resource planning across inventory, HR, finance & operations.
See the full software development range · Browse the work we have shipped
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.