I will build rest API or graphql backend with net core

H
heyther_blanco
H
heyther_blanco
Heyther
build rest API or graphql backend with net core
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build rest API or graphql backend with net core
Full Screen
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build rest API or graphql backend with net corebuild rest API or graphql backend with net corebuild rest API or graphql backend with net core

About this gig

I will build a high-performance backend using .NET Core / .NET 8 with C#.


What you get:

  • RESTful, GraphQL, or gRPC API
  • Database integration with Entity Framework Core (SQL Server, PostgreSQL, MySQL)
  • Authentication (JWT, OAuth2, Identity)
  • Clean architecture
  • API documentation (Swagger)


Services:

  • New API from scratch
  • Add features to existing .NET project
  • Refactor legacy code to modern .NET


You receive production-ready code with clear documentation.

  • Expertise

    • Algorithms & Data structures
    • Security
    • Databases
    • Source control
    • Testing procedures

  • Programming language

    • C#

  • Frontend framework

    • Angular
    • Bootstrap
    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • NestJS
    • Node.js
    • Quarkus
    • Spring
    • Other

Get to know Heyther

Heyther

Software Developer

  • FromColombia
  • Member sinceOct 2025
  • Avg. response time1 hour

  • Languages

    English, Spanish
I'm Heyther, a professional Software Developer with experience building scalable and secure web applications using Java (Spring Boot), .NET (C# / ASP NET Core), and Nodejs (Nest / Express). I specialize in microservices architectures, event-driven systems (Kafka, RabbitMQ, MQTT), and secure API design with REST, GraphQL, and gRPC. I apply modern engineering principles like Hexagonal, Clean, and Vertical Slicing architectures, and I’m comfortable deploying solutions on Docker, AWS, Azure, and Firebase. Whether you need a new backend from scratch, API integrations, or help improving.

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