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Giulio SannaGS

Giulio Sanna

Back-End Developer | .NET & GraphQL Specialist

€180/day
Trieste, IT
3-7 years

Average response time: 1 hour

About Giulio

Back-End Developer specialized in .NET ecosystems, building scalable and maintainable software for international clients.
I design and develop distributed systems using Event-Driven Architecture, microservices, and asynchronous messaging through Service Bus and MQTT brokers. My daily work revolves around .NET 6/8,10, Entity Framework, GraphQL (HotChocolate), and REST APIs always following established design patterns like Repository, CQRS, and Mediator.
What I bring to your project:

API design and development (GraphQL & REST), optimized with DataLoader and caching strategies
Microservice architecture with async communication and event-driven flows
Database design and management with Entity Framework and ADO.NET
RBAC implementation, request validation middleware, and FluentValidation
Multi-environment deployment pipelines and containerized jobs
Third-party API synchronization, transactional email, and dynamic Excel generation
Industrial IoT prototyping (Kepware, MQTT, PLC integration)

I work full-remote with international teams, participating in sprint planning and client-facing meetings in English. I focus on writing clean, well-tested code with long-term maintainability in mind.
I currently prefer small to medium-sized projects where I can make a direct impact and maintain close communication with the client throughout the process.
If you need a reliable back-end developer who can take ownership of complex systems from architecture to delivery, let's talk.
  • Italian

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • JobInformatica
    Backend Software Developer
    DIGITAL AND IT
    September 2023 - Today (2 years and 9 months)
    - Designed and implemented scalable GraphQL APIs using HotChocolate and Banana Cake Pop, with performance optimization via DataLoader for batching multiple requests
    - Built custom middleware for request validation, role-based access control (RBAC), and cross-cutting concerns
    - Developed containerized background jobs for telemetry data processing and storage on Azure BlobStorage
    - Managed database interactions using Entity Framework (code-first) and ADO.NET on .NET 6.0 & 8.0 & 10.0
    - Wrote unit tests for GraphQL queries, repositories and services to ensure software quality and long-term stability
    - Delivered an industrial IoT prototype integrating Kepware (OPC), MQTT broker (Mosquitto) and two microservices with a sub-2-second end-to-end response time
    - Collaborated daily in English with international stakeholders and clients, participating in sprint planning and periodic project updates
  • Euris
    Backend & Integration Developer
    DIGITAL AND IT
    May 2023 - June 2023 (1 month)
    Udine, Italy
    Contributed to the development of a DevOps-style web application for card-based task management, collaborating with the Team Leader on software architecture design. Implemented the backend using ASP.NET MVC and Entity Framework code-first, following a Test-Driven Development approach to ensure system reliability. Designed and developed a scheduled background service running every 24 hours, responsible for automatically synchronizing data with an external platform exposing dashboards, keeping their content up to date through Web API integration. Also handled frontend development using Bootstrap, contributing to a consistent and responsive user interface.
    Bootstrap ASP.NET MVC .NET API SQL

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