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Adrian Brea NuñezAB

Adrian Brea Nuñez

Senior Backend Developer .NET, APIs, SaaS & Cloud

200 €/día
La Coruña, ES
3-7 años

Tiempo medio de respuesta: 1h

Acerca de Adrian

I specialize in building and modernizing production-grade systems for SaaS platforms. With 4+ years of intensive experience, I bridge the gap between complex business logic and scalable cloud infrastructure.

My focus is on reliability, performance, and clean architecture. I don’t just write code; I design systems that stay up under pressure and evolve without friction.
Technical Expertise

► Backend Ecosystem (.NET & Python)

C# / .NET: .NET 8/7, ASP.NET Core, Web API, Entity Framework Core, LINQ.

Python: FastAPI (high-performance services), Pydantic, SQLAlchemy.

Architecture: Microservices, Clean Architecture, DDD, RESTful APIs.

► Cloud & DevOps (Azure Specialist)

Azure: App Services, Azure Functions (Serverless), Azure Service Bus, Key Vault, Blob Storage.

Containers: Docker & Docker Compose.

CI/CD: GitHub Actions, Azure DevOps Pipelines.

► Data & Security

Databases: PostgreSQL (Expert), SQL Server, Redis (Caching).

Security: OAuth2, OpenID Connect, JWT, Role-Based Access Control (RBAC).

► Tools & Methodology

VCS: Git (GitHub, GitLab, Bitbucket).

Testing: xUnit, NUnit, Pytest (Integration & Unit Testing).

Agile: Scrum, Kanban, Jira, Linear.

What I Solve for You

Modernization: Refactoring legacy monoliths into modern .NET/Python microservices.

Scaling: Optimizing database queries and implementing caching strategies to handle high traffic.

Integrations: Connecting your platform with 3rd party APIs (Payments, CRMs, Auth providers).

Cloud Migration: Moving your on-premise logic to a fully automated Azure environment.
  • Español

    Bilingüe o nativo

  • Inglés

    Competencia profesional completa

Solo teletrabajo
Lleva a cabo sus proyectos principalmente en remoto

Experiencia

  • Teknei
    Senior Software Engineer
    PRENSA & MEDIOS
    octubre de 2025 - Hoy (10 meses)
    Madrid, España
    Working on the modernization of legacy backend systems, migrating existing solutions to modern .NET-based architectures.

    My responsibilities include designing authentication and authorization mechanisms using OpenID Connect and OAuth 2.0, as well as defining security boundaries across services.

    I’m involved in the design of modular monolithic architectures with a clear path towards future microservices adoption, focusing on scalability, maintainability, and resilience.

    Key contributions:
    - Migrating legacy .NET projects to modern .NET versions and Linux environments
    - Designing authentication and authorization flows using OpenID Connect and OAuth 2.0
    - Building a shared logging library using aspect-oriented programming, OpenTelemetry, and Castle DynamicProxy
    - Defining observability standards (logs, traces, metrics)
    - Designing backend architectures and database models
    - Applying resilience patterns and contributing to CI/CD pipelines
    .NET CI/CD OAuth Docker Software Architecture
  • Plexus Tech
    Software Engineer
    VIAJES & TURISMO
    enero de 2023 - octubre de 2025 (2 años y 9 meses)
    Santiago de Compostela, España
    Backend development for a large-scale booking platform used by a multinational hotel chain.

    I worked mainly on backend APIs and distributed systems, focusing on performance, scalability, and reliability in production environments.

    In addition to the core .NET platform, I developed auxiliary backend services using Python and FastAPI for integrations and supporting use cases.

    Key responsibilities:
    - Designing and implementing backend services using .NET, Clean Architecture, and DDD
    - Building and maintaining APIs for internal and external clients
    - Developing FastAPI services for integrations
    - Migrating legacy .NET Framework services to .NET Core
    - Optimizing database performance and introducing Redis caching
    - Designing CI/CD pipelines and monitoring systems
    ASP.NET Core Micro-services Microsoft Azure CosmosDB Python
  • Nextgal Soluciones Informáticas S.L
    Junior Software Engineer
    TELECOMUNICACIONES
    enero de 2022 - enero de 2023 (1 año)
    Corunna, Spain
    Worked on internal tools and backend systems supporting warehouse monitoring and data processing.

    Responsibilities:
    - Developing .NET APIs to process and expose data
    - Building automated data collection tools
    - Creating internal monitoring utilities
    - Fixing bugs and improving stability across applications
    .NET Back-End development SQL Server Unit Testing Razor

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Formación

  • Ciclo Formativo de Grado Superior
    IES Fernando Wirtz
    2022
    Ciclo Formativo de Grado Superior

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