CareOnix

API & Backend Development

The engine behind your applications - reliable and scalable

We design and build backend systems, APIs, and data layers that power your products. Clean architecture, thorough documentation, and the reliability your business depends on.

  • RESTful and GraphQL API design
  • Microservices and event-driven architecture
  • Secure, documented, and scalable

Integration layer

EHR
CRM
ERP
CareOnix API
POST /v1/extract { "status": "ok", "confidence": 0.98 }

What we build

Backend engineering, done properly

From API design to database optimization, we build the foundation your products run on.

API design and development

Clean, versioned, well-documented APIs that your team and partners can rely on.

Microservices

Independently deployable services with clear boundaries and fault isolation.

Event-driven systems

Message queues, webhooks, and event buses for real-time, loosely coupled architectures.

Data layer design

Schema design, query optimization, and data access patterns for performance and maintainability.

Authentication and security

OAuth 2.0, JWT, role-based access, rate limiting, and encryption built in from the start.

API documentation

OpenAPI specs, interactive docs, and SDKs so consumers can integrate quickly.

How it works

Clean contracts, reliable systems

We build backends that are a pleasure to work with - well-documented, consistently structured, observable, and designed to handle growth without rearchitecting.

  • Versioned API contracts with backward compatibility
  • Comprehensive logging, metrics, and alerting
  • Load-tested and validated under realistic traffic
Engineer designing API architecture

How we work

From requirements to a production backend

A structured approach that keeps systems stable and maintainable.

  1. 01

    Assess requirements

    We define data models, integrations, and performance requirements.

  2. 02

    Design the architecture

    We specify API contracts, service boundaries, and data flows.

  3. 03

    Build and test

    We develop with automated testing and code review at every step.

  4. 04

    Deploy and secure

    We set up CI/CD, harden security, and validate under load.

  5. 05

    Monitor and scale

    We instrument the system and tune performance as traffic grows.

The payoff

What great backend engineering delivers

The invisible foundation that makes everything else work.

Fast response times

Optimized queries and caching that keep API responses under target latency.

Scales with demand

Architecture that handles traffic spikes without manual intervention.

Secure by design

Authentication, authorization, and encryption built in - not bolted on.

Developer-friendly

Clear docs, consistent patterns, and SDKs that make integration fast.

Easy to extend

Clean separation of concerns means new features do not break existing ones.

Observable

Logging, metrics, and alerting so issues are caught before users notice.

Under the hood

Technologies we build with

Languages

  • Node.js
  • Python
  • Go
  • C# / .NET

APIs

  • REST
  • GraphQL
  • gRPC
  • WebSockets

Databases

  • PostgreSQL
  • MongoDB
  • Redis
  • DynamoDB

Infrastructure

  • Docker
  • Kubernetes
  • AWS
  • Azure

FAQ

Questions, answered

Still deciding? These are the things teams ask us most - and if yours isn't here, a 30-minute call will cover it.

It depends on your use case. REST is great for simple, well-defined resources. GraphQL excels when clients need flexible queries. We recommend based on your specific needs.

Yes. We can extend, refactor, or build alongside your current systems - whatever makes the most sense.

API versioning, deprecation policies, and migration guides so existing consumers are never broken by updates.

We handle schema design, indexing strategy, query optimization, and migration planning as part of every backend project.

Yes. Every backend we deliver includes logging, metrics, health checks, and alerting.

Let's scope your project

Tell us what you're trying to solve. We'll come back with a clear, fixed-scope plan - no jargon, no obligation.