I will build custom backend apis, rest API and web services

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develop_ebay
D
develop_ebay
Great A
build custom backend apis, rest API and web services
Full Screen
build custom backend apis, rest API and web services
Full Screen
build custom backend apis, rest API and web servicesbuild custom backend apis, rest API and web services

About this gig

Need a reliable custom backend API for your website, app, SaaS, or business system?


I will build secure and scalable custom backend APIs using REST, authentication, databases, and clean backend architecture.


I can develop APIs for

  • Web and mobile applications
  • SaaS platforms
  • Custom dashboards
  • CRM and business systems
  • E-commerce platforms
  • Database-driven applications
  • Third-party API connections
  • Custom business workflows


Services include

  • Custom REST APIs
  • API endpoints
  • Authentication
  • Database integration
  • CRUD operations
  • Validation
  • Business logic
  • Webhooks
  • Error handling
  • API testing
  • Documentation.


Whether you need a new backend API or want to extend an existing backend, I can build a solution around your requirements


You will receive clean source code, tested API functionality, and documentation where applicable.


Please contact me before ordering so I can review your requirements and recommend the right package.

  • Expertise

    • Debugging
    • Localization
    • Performance
    • Design
    • Source control

  • Programming language

    • JavaScript

  • Frontend framework

    • Bootstrap
    • Ember.js
    • Flutter
    • Next.js
    • Nuxt.js

  • Backend framework

    • FastAPI
    • Fastify
    • NestJS
    • Next.js
    • Node.js

Get to know Great A

Great A

API DEVELOPER

  • FromUnited Kingdom
  • Member sinceSep 2025
  • Avg. response time1 day

  • Languages

    English, Spanish, French
I am a developer specializing in API integration, payment gateways, webhooks, automation, and backend solutions. I help businesses connect websites, applications, databases, and third-party platforms using reliable API solutions. I work with REST APIs, GraphQL, payment APIs, authentication, data synchronization, and custom integrations. I can integrate payment gateways, troubleshoot API issues, build backend connections, and automate business workflows. My focus is on clean, secure, and reliable solutions tailored to each project.

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