Service
API Development and Integration
Robust RESTful and GraphQL APIs, third-party integrations, and legacy system modernisation. We make your software talk to everything it needs to.
Modern businesses run on interconnected systems. We design and build APIs that are reliable, well-documented, and built to last — and we integrate the third-party services your product depends on without creating fragile coupling.
What's included
- RESTful and GraphQL API design
- Third-party API integrations
- Webhook implementations
- Legacy system modernisation
Key metrics
< 50ms
P99 API latency target
OpenAPI
Full spec coverage
100%
Webhook reliability
Versioned
Zero breaking changes
How We Build It
A layered production architecture designed for reliability, performance, and maintainability.
API Consumers
Web / mobile / partners
API Gateway
Rate limiting + auth
REST / GraphQL
Service layer
Event Bus
Webhooks + queues
PostgreSQL
Primary datastore
Docker / AWS
Container runtime
Architecture varies per project — this represents our standard production pattern for this service.
Our Process
API Design
OpenAPI specification reviewed and approved before implementation. Contract-first development.
Integration Mapping
Third-party API analysis, authentication flows, rate limit strategy, and error handling documented.
Implementation
Typed SDK generation, retry logic, circuit breakers, and idempotency keys built by default.
Documentation
Interactive docs with Swagger UI, webhook event catalogue, and integration guides for your team.
Technology Stack
Why clients choose us
- End-to-end ownership — no agency hand-offs
- Architecture documented before any code is written
- Tests written alongside features, not as an afterthought
- Fixed-price phases with clear deliverables
API Design and Development
RESTful APIs
Resource-oriented REST APIs with consistent naming conventions, proper HTTP semantics, versioning strategies, and OpenAPI documentation. We design for developer experience as well as functionality.
GraphQL APIs
Schema-first GraphQL APIs with efficient resolvers, dataloader batching to prevent N+1 queries, and subscription support for real-time features. We build GraphQL that performs under load.
Webhooks and Event Systems
Reliable webhook delivery with retry logic, signature verification, and idempotency handling. We design event-driven architectures that decouple your services without introducing data loss risks.
Third-Party Integrations
Payment Systems
Stripe, PayPal, Adyen — we implement payment flows correctly including 3D Secure, webhook handling, refund logic, and dispute management. No payment integration is simple; we have done them at scale.
CRM and Marketing Platforms
Salesforce, HubSpot, Mailchimp, and custom CRM integrations. We build bidirectional sync pipelines that keep your systems consistent without manual intervention.
Communication Platforms
Twilio, SendGrid, and push notification services integrated with proper fallback logic, rate limiting, and delivery tracking.
Data Platforms
Data warehouse integrations with Snowflake, BigQuery, or Redshift. ETL pipelines that move data reliably without data loss or duplication.
Legacy System Modernisation
We wrap legacy systems with modern API layers, gradually migrating functionality to new services using the strangler fig pattern. Your team keeps shipping while the migration proceeds in the background.
API Security
Rate limiting, API key management, OAuth 2.0 token validation, and input sanitisation on every endpoint. We implement API gateways where appropriate to centralise cross-cutting concerns.
Technologies
REST, GraphQL, gRPC, AWS API Gateway, Docker, Stripe, Twilio, Salesforce.
Start Your API Project
Describe the systems you need to connect or the API you need to build. We will propose an integration architecture within 48 hours.
Ready to get started?
Let's build your connect your systems. automate your workflows.
Tell us what you need. We respond within one business day with a technical plan and realistic timeline — no sales pitch.
Start Your Project