APIs your consumers can actually rely on.

We design and build APIs that are well-documented, consistently structured, securely authenticated, and operationally observable. REST and GraphQL. NestJS, FastAPI, Laravel — the right backend for your requirements. API-first as standard practice. 

Tech_API devolopment
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300+
APIs designed and deployed
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OpenAPI Documentation
always included
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20+
years in API development
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#1
Clutch

API work
we do regularly

Six types of API work — each with distinct design, authentication, and documentation requirements.
01

REST API Design & Development

Resource-oriented REST APIs following proper HTTP semantics — correct status codes, consistent error responses, versioning strategy, pagination, filtering and sorting. OpenAPI 3.1 documentation included. Backends: NestJS, FastAPI, Laravel, ASP.NET Core.

02

GraphQL API Development

Schema-first GraphQL with Apollo Server (Node.js), Strawberry (Python), or Lighthouse (Laravel). DataLoader for N+1 prevention, subscription support for real-time data, persisted queries for production efficiency.

03

Third-Party API Integration

Integrating with payment providers (Stripe, Afterpay, PayPal), communication platforms (Twilio, SendGrid), CRMs (Salesforce, HubSpot), ERPs (SAP, Xero, MYOB). Retry logic, circuit breakers, dead-letter queues.

04

Webhook Systems

Inbound webhook receivers (Stripe, GitHub, Shopify) with signature verification, idempotency handling, and queued processing. Outbound webhook systems for notifying customers or partners of platform events.

05

API Gateway & Management

AWS API Gateway, Kong, or Nginx for routing, rate limiting, authentication, and logging across multiple services. Developer portal, API key management, usage analytics.

06

API Modernisation

Migrating legacy SOAP/WCF/XML services to modern REST or GraphQL. Versioning existing APIs without breaking consumers. Building adapter layers for transition periods.

Who hires us

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Product teams whose APIs are consumed by mobile, web, and partners

You need an API that works reliably as a contract — well-documented, versioned, and stable enough that consumers can build against it without calling you every week.

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Companies integrating with third-party APIs that keep breaking

Your Stripe, Salesforce, or ERP integration fails silently. Nobody knows until a customer complains. We build integrations with the observability and resilience that most initial implementations skip.

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Startups launching an API for external developers

A public API is a product. Documentation, authentication, rate limiting, error responses, and changelogs are not optional features — they're what determines whether developers adopt your API or abandon it.

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Enterprises retiring legacy SOAP or XML services

Legacy SOAP services block mobile adoption and developer productivity. We build the REST replacement and the adapter layer that lets existing consumers migrate at their own pace.

Need an API spec reviewed before development starts?

We'll review your planned API design, flag issues with authentication, versioning, and error handling before a line of code is written. Free — and faster to fix issues in spec than in code.

API-first.
Documented.
Integration-grade.

Four practices that separate an EB Pearls API from one that works in staging and breaks in production.
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API-first is how we start every project

We design the OpenAPI spec before writing a line of implementation code. The backend team and frontend/mobile teams agree on the contract first. This eliminates the most common integration bugs — both sides built against a shared, explicit agreement.
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Authentication done correctly, every time

JWT with short expiry and refresh rotation. OAuth 2.0 for third-party access. API keys with per-key rate limiting. Scoped permissions. We implement these correctly — not with copy-pasted middleware that doesn't actually validate tokens properly.
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Third-party integrations that don't break

External APIs are unreliable. We build every integration with retry logic, circuit breakers, idempotency keys, dead-letter queues, and alerting for unusual error rates. The integration works on Tuesday when the third-party has an incident.
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Documentation is a first-class deliverable

Interactive Swagger UI or Redoc hosted as part of your API. Integration guides for common use cases. Change logs when versions ship. Your developers don't need to reverse-engineer the API from source code or Postman collections.

API-First vs Code-First

Dimension Code-first (typical approach) API-first (EB Pearls standard)
When does the contract exist? After backend is built
✓ Before a line of implementation code
Can frontend/mobile build in parallel? ✗ Wait for backend
✓ Build against spec immediately
Documentation ✗ Written after — often skipped
✓ Generated from code, always current
Integration testing ✗ Discovered during integration
✓ Contract tests validate both sides independently
Breaking change detection ✗ Manual review
✓ OpenAPI diff in CI — caught before merge
Third-party integrations ✗ Happy path only
✓ Retry, circuit breaker, DLQ built in

Our technology stack

★ marks our preferred production choice.

Backends

  • ★ NestJS
  • ★ FastAPI
  • Laravel
  • ASP.NET Core

API Styles

  • ★ REST + OpenAPI 3.1
  • ★ GraphQL (Apollo, Strawberry)
  • tRPC (TypeScript end-to-end)
  • gRPC (microservice-to-microservice)
    WebSockets

Auth

  • ★ JWT + refresh rotation
  • ★ OAuth 2.0 / OIDC (Auth0, Cognito)
  • API keys with rate limiting
  • mTLS (service-to-service)

Integration Infra

  • ★ BullMQ / SQS
  • ★ Redis (rate limiting, idempotency)
  • AWS API Gateway / Kong
  • Circuit breaker (opossum)

Your project is 100% protected

EB Pearls signs an NDA before any technical discussion. Your code, architecture, and business logic remain entirely yours.

✓ ISO 27001
✓ ISO 9001
✓ NDA First

From kick-off to production

Stage 01

API Design & Contract

Write OpenAPI spec. Define authentication, versioning, error responses. Consumer review and sign-off before implementation.

Weeks 1–2

Stage 02

Core Implementation

Build API endpoints, business logic, data access layer. Auto-generate documentation from code. Unit and integration tests throughout.

Weeks 3–8

Stage 03

Integration & Auth

Wire third-party integrations with resilience patterns. Implement auth flows. Build webhook systems. Run contract tests.

Weeks 9–12

Stage 04

Production & Docs

Deploy to production. Publish hosted documentation. Configure rate limiting, monitoring, alerting. Handover and integration guide.

Final 2 weeks

How to work with us

Fixed-Price API Build

Defined scope and timeline. API contract agreed upfront, implementation delivered against it. From REST APIs to enterprise API platforms.

AUD $20,000–$130,000+

API Retainer

Ongoing API development, versioning, third-party integration management, and documentation updates as your product evolves.

From AUD $8,000/month

API Design Review

We review your existing or planned API design, identify issues with auth, versioning, and error handling, and produce a prioritised improvement list.

From AUD $4,500

Every question answered.

Can't find what you need?

Designing and specifying the API contract (OpenAPI spec) before writing implementation code. Both backend and frontend/mobile teams agree on the contract first. Eliminates the most common integration bugs and enables parallel development without coordination overhead.

Simple REST API: AUD $20,000–$50,000. Full product API: $50,000–$130,000. Enterprise API platform: from $130,000. Fixed-scope quotes after a free technical discovery.

An HTTP callback — the external system sends a POST to your endpoint when something happens, rather than you polling for updates. We build webhook receivers with idempotency handling, signature verification, queued processing, and dead-letter queuing for failures.

JWT with short expiry and refresh rotation. OAuth 2.0 for third-party access. API keys with per-key rate limiting for server-to-server. mTLS for service-to-service mutual authentication. Scoped permissions for fine-grained access control.

Every third-party integration is built with: retry logic and exponential backoff, circuit breakers that fail gracefully, idempotency keys for operations that must not repeat, dead-letter queues for failures, and alerting for unusual error rates. The integration works when the third-party has an incident.

Yes. We assess the existing service, design the REST replacement, build an adapter layer that lets new systems integrate before the legacy system is decommissioned, and handle the migration without breaking existing consumers.

REST for CRUD, public APIs, and HTTP caching. GraphQL for complex data requirements where different consumers need different data shapes. The right choice depends on your consumers and API surface — we build both and recommend based on your use case.

OpenAPI 3.1 spec auto-generated from code, hosted as Swagger UI or Redoc. Integration guides for common use cases. Change logs when versions ship. Documentation is a first-class deliverable — not an afterthought.

URL versioning (/v1/, /v2/) for public APIs where consumer adoption is slow. Header versioning for internal APIs where clients can be coordinated. We establish a versioning strategy before launch — not as a breaking-change retrofit.

A dedicated backend service that aggregates and transforms data from multiple microservices or third-party APIs into the exact shape each frontend client needs. Reduces over-fetching, simplifies frontend logic, and enables frontend-specific caching and optimisation.

Yes — AWS API Gateway, Kong, or Nginx for routing, rate limiting, authentication, and logging across multiple backend services. Developer portal setup, API key management, and usage analytics. We recommend the right gateway based on your infrastructure and team size.

OpenAPI spec is auto-generated from code annotations (NestJS @nestjs/swagger, FastAPI native, Laravel Scribe). Hosted as interactive Swagger UI or Redoc. Validated in CI to catch documentation drift. We never maintain a separate documentation document that gets out of sync with the implementation.
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Build an API your consumers can rely on.

45 minutes. We'll review your requirements, discuss the API design, and give you a realistic view of scope, timeline, and what it takes to build an API that lasts.

Contact EB Pearls
What to expect on your call

What to expect

  1. 1 Share a few details
    Complete the form with your contact details and what you need help with.
  2. 2 Book your free discovery call
    Once you submit the form, choose a time that suits you for your discovery call.
  3. 3 Privacy comes first
    Sign an optional NDA to ensure the highest privacy level and protection of your idea.
  4. 4 Discovery call
    We’ll discuss your goals, the support you need and answer your questions. If we’re a good fit, we’ll outline the next steps.

What to expect

  1. 1 Share a few details
    Complete the form with your contact details and what you need help with.
  2. 2 Book your free discovery call
    Once you submit the form, choose a time that suits you for your discovery call.
  3. 3 Privacy comes first
    Sign an optional NDA to ensure the highest privacy level and protection of your idea.
  4. 4 Discovery call
    We’ll discuss your goals, the support you need and answer your questions. If we’re a good fit, we’ll outline the next steps.