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$
USD
I will build scalable backend, rest API, graphql or microservices
Heyther
About this gig
I will build a robust, scalable backend for your project.
Technologies I use:
- Java (Spring Boot)
- C# (.NET Core)
- Node.js (Express, NestJS)
What you get:
- RESTful, GraphQL or gRPC APIs
- Microservices architecture with Docker and message brokers (Kafka, RabbitMQ)
- Database design and integration (SQL: PostgreSQL, MySQL, SQL Server; NoSQL: MongoDB, Redis)
- Authentication and security (JWT, OAuth2)
- Clean, maintainable code following best practices (hexagonal architecture, DDD, SOLID)
Services:
- New backend from scratch
- Additional features for existing systems
- Migration to microservices
- Code review and optimization
You will receive production-ready code with clear documentation (Swagger/Postman)
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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Other Software Development Services I Offer
FAQ
What do you need from me to get started?
I’ll need a clear description of your requirements — such as endpoints, features, data models, and preferred technologies (if any). If you already have an existing project or documentation, that helps speed up delivery.
Can you connect the API to my frontend or mobile app?
Yes! I can integrate your backend with a web or mobile frontend using REST or GraphQL endpoints, providing secure and optimized communication.
Do you include database integration?
Yes, database integration (SQL or NoSQL) is included in the Standard and Premium packages, and can be added as an extra for the Basic plan.
Can you deploy the project to a cloud platform?
Yes, I can help you deploy to Azure, or any Docker-compatible environment. This is available as an optional extra.
Will you provide documentation?
Yes. I provide Postman or Swagger/OpenAPI documentation, so you can test and understand every endpoint easily.
What if I need modifications after delivery?
Each package includes revisions, and I’m always open to small adjustments to ensure you’re satisfied. Larger changes can be handled through a custom offer.
Do you include unit tests?
Standard and Premium packages include basic unit tests. If you need higher coverage, we can arrange it.
Which programming languages and frameworks do you work with?
I specialize in: Java: Spring Boot (including Spring Data, Spring Security, Spring Cloud) C#/.NET: ASP.NET Core (Web API, Minimal APIs, Entity Framework Core) JavaScript/TypeScript: Node.js with Express or NestJS If you need a different stack (Python, PHP, Go), contact me and I’ll let you know
What if I need a frontend as well?
I also offer fullstack development with Angular. You can check my fullstack gig or message me for a custom quote.
What versions do you use?
I work with modern LTS versions: Java 17/21 with Spring Boot 3.x .NET 6 or 8 Node.js 18/20 with Express 4.x or NestJS 10 If you have specific version constraints, let me know.
