Digital Solutions & Application Services

API Development & Integration

What We Do

API Development and Integration Built for Real-World Systems

From custom API development to connecting your platform with third-party services, we handle the full scope of API integration work so your systems communicate reliably and securely.

Custom API Development

We design and build APIs tailored to your business logic, whether REST or GraphQL, with clean documentation and consistent standards so your internal and external teams can work with them easily.

Third-Party System Integration

We connect your product or platform to the external services your business depends on, including payment gateways, CRMs, ERPs, logistics platforms, and communication tools.

Legacy System Integration

We build integration layers that allow your modern applications to communicate with older systems without requiring a full replacement, protecting your existing investment while enabling new capabilities.

Microservices and API Architecture

We design API-first architectures that allow your product to scale in parts rather than as a single block, making it easier to update, maintain, and extend individual services independently.

API Security and Authentication

We implement industry-standard security practices including OAuth 2.0, API key management, rate limiting, and access controls so your APIs are protected from misuse and unauthorised access.

API Documentation and Governance

We produce clear, structured API documentation that your developers, partners, and internal teams can rely on, along with governance guidelines to keep your API ecosystem consistent as it grows.

Custom API Development

We design and build APIs tailored to your business logic, whether REST or GraphQL, with clean documentation and consistent standards so your internal and external teams can work with them easily.

Third-Party System Integration

We connect your product or platform to the external services your business depends on, including payment gateways, CRMs, ERPs, logistics platforms, and communication tools.

Legacy System Integration

Microservices and API Architecture

We design API-first architectures that allow your product to scale in parts rather than as a single block, making it easier to update, maintain, and extend individual services independently.

API Security and Authentication

We implement industry-standard security practices including OAuth 2.0, API key management, rate limiting, and access controls so your APIs are protected from misuse and unauthorised access.

API Documentation and Governance

We produce clear, structured API documentation that your developers, partners, and internal teams can rely on, along with governance guidelines to keep your API ecosystem consistent as it grows.

Why Finlytyx

Why Businesses Trust Us with Their Integration Work

API integration work looks straightforward until something breaks in production. We bring the experience to get it right from the start and keep it running reliably after launch.

We Build APIs That Are Meant to Be Used

A poorly documented or inconsistently designed API slows down every team that touches it. We build APIs with the developer experience in mind so integration work is fast, predictable, and low on friction.

We Understand Both Sides of the Integration

Most integration problems happen at the boundary between systems. Our team understands both the technical and business context on each side, which means we design integrations that hold up in production rather than just in theory.

We Plan for Change from the Start

APIs evolve. Systems get updated, business requirements shift, and new integrations get added. We design with versioning, backward compatibility, and maintainability in mind so changes do not break what is already working.

We Take Security Seriously

APIs are a common attack surface in modern systems. We apply security best practices at every layer of the API, from authentication and authorisation through to data validation and rate limiting.

We Work with Your Existing Stack

We do not require you to adopt a new platform or replace your existing systems to work with us. We integrate with what you already have and advise on the most practical approach given your current environment.

We Stay Involved After Go-Live

Integration issues often surface after launch, not before. We provide post-launch support to handle edge cases, monitor performance, and make adjustments so your integrations stay reliable over time.

We Build APIs That Are Meant to Be Used

We Understand Both Sides of the Integration

We Plan for Change from the Start

We Take Security Seriously

APIs are a common attack surface in modern systems. We apply security best practices at every layer of the API, from authentication and authorisation through to data validation and rate limiting.

We Work with Your Existing Stack

We Stay Involved After Go-Live

Integration issues often surface after launch, not before. We provide post-launch support to handle edge cases, monitor performance, and make adjustments so your integrations stay reliable over time.

API Development and Integration Built for Real-World Systems

From custom API development to connecting your platform with third-party services, we handle the full scope of API integration work so your systems communicate reliably and securely.

Custom API Development

We design and build APIs tailored to your business logic, whether REST or GraphQL, with clean documentation and consistent standards so your internal and external teams can work with them easily.

Third-Party System Integration

We connect your product or platform to the external services your business depends on, including payment gateways, CRMs, ERPs, logistics platforms, and communication tools.

Legacy System Integration

Microservices and API Architecture

We design API-first architectures that allow your product to scale in parts rather than as a single block, making it easier to update, maintain, and extend individual services independently.

API Security and Authentication

We implement industry-standard security practices including OAuth 2.0, API key management, rate limiting, and access controls so your APIs are protected from misuse and unauthorised access.

API Documentation and Governance

We produce clear, structured API documentation that your developers, partners, and internal teams can rely on, along with governance guidelines to keep your API ecosystem consistent as it grows.

Custom API Development

We design and build APIs tailored to your business logic, whether REST or GraphQL, with clean documentation and consistent standards so your internal and external teams can work with them easily.

Third-Party System Integration

We connect your product or platform to the external services your business depends on, including payment gateways, CRMs, ERPs, logistics platforms, and communication tools.

Legacy System Integration

Microservices and API Architecture

We design API-first architectures that allow your product to scale in parts rather than as a single block, making it easier to update, maintain, and extend individual services independently.

API Security and Authentication

We implement industry-standard security practices including OAuth 2.0, API key management, rate limiting, and access controls so your APIs are protected from misuse and unauthorised access.

API Documentation and Governance

We produce clear, structured API documentation that your developers, partners, and internal teams can rely on, along with governance guidelines to keep your API ecosystem consistent as it grows.

Why Businesses Trust Us with Their Integration Work

API integration work looks straightforward until something breaks in production. We bring the experience to get it right from the start and keep it running reliably after launch.

We Build APIs That Are Meant to Be Used

We Understand Both Sides of the Integration

We Plan for Change from the Start

We Take Security Seriously

APIs are a common attack surface in modern systems. We apply security best practices at every layer of the API, from authentication and authorisation through to data validation and rate limiting.

We Work with Your Existing Stack

We Stay Involved After Go-Live

Integration issues often surface after launch, not before. We provide post-launch support to handle edge cases, monitor performance, and make adjustments so your integrations stay reliable over time.

We Build APIs That Are Meant to Be Used

We Understand Both Sides of the Integration

We Plan for Change from the Start

We Take Security Seriously

APIs are a common attack surface in modern systems. We apply security best practices at every layer of the API, from authentication and authorisation through to data validation and rate limiting.

We Work with Your Existing Stack

We Stay Involved After Go-Live

Integration issues often surface after launch, not before. We provide post-launch support to handle edge cases, monitor performance, and make adjustments so your integrations stay reliable over time.