.Net Developer

Fyld; Porto; On-site; EUR 52,000 - 75,000; Full time

Job summary

Fyld is hiring a Senior .NET Backend Developer to build modern, cloud-native solutions that deliver real business impact. You will work on scalable distributed systems using .NET, Azure, and AWS in a collaborative, growth-oriented environment.

Ideal candidates have strong C# expertise, backend experience, and a passion for clean architecture, testing, and continuous learning. English fluency is essential as projects span international teams and clients.

Qualifications

• Degree in Computer Engineering, Software Engineering, or a related field.
• 4+ years of experience in Backend Development.
• Strong experience with NET Core / .NET 6+ / .NET 8.
• Solid knowledge of C#, ASP.NET Core, RESTful APIs, and Microservices Architecture.
• Experience designing and implementing scalable and resilient distributed systems.
• Knowledge of relational databases (EF Core, SQL Server, PostgreSQL).
• Experience with Azure cloud services and AWS (nice to have).
• Docker, containerized apps and Kubernetes knowledge is a plus.
• CI/CD proficiency with Azure DevOps, GitHub Actions, or GitLab CI.
• Understanding of Clean Architecture, SOLID, design patterns, and DDD.
• Messaging architectures (Kafka, RabbitMQ, Azure Service Bus).
• Observability tools and IaC (Terraform, Bicep, CloudFormation).
• Fluent in English.

Skills

C#

ASP.NET Core

RESTful APIs

Microservices

Distributed Systems

Entity Framework Core

SQL Server

PostgreSQL

Azure Functions

Azure Service Bus

Azure Storage

Azure Key Vault

Azure API Management

Azure Monitor

Application Insights

AWS Lambda

ECS / EKS

S3

RDS

API Gateway

CloudWatch

IAM

Docker

Kubernetes

CI/CD

Azure DevOps

GitHub Actions

GitLab CI

Clean Architecture

SOLID principles

Design Patterns

DDD

Kafka

RabbitMQ

Terraform

Bicep

CloudFormation

English

Education

Bachelor's degree in Computer Engineering / Software Engineering or related field

Tools

Azure DevOps

GitHub Actions

GitLab CI

Terraform

Bicep

CloudFormation

Job description

Fyld is hiring: Senior .NET Backend Developer

At Fyld, we believe the future is built with people, technology, and strong values. We are a Portuguese consulting company that operates with transparency, respect, and a focus on everyone's growth. Here, every project is an opportunity to build real, lasting, and scalable solutions. Our philosophy? Code for Big Solutions — because we don't just code to make things work, we code to transform. We're looking for a passionate Senior .NET Backend Developer to join our team and help build modern, cloud-native solutions that create real business impact.

Your Profile

• Degree in Computer Engineering, Software Engineering, or a related field
• 4+ years of experience in Backend Development
• Strong experience with NET Core / .NET 6+ / .NET 8
• Solid knowledge of C#, ASP.NET Core, RESTful APIs, and Microservices Architecture
• Experience designing and implementing scalable and resilient distributed systems
• Knowledge of Entity Framework Core, SQL Server, PostgreSQL, or other relational databases
• Experience with Azure Cloud Services: Azure App Services, Azure Functions, Azure Service Bus, Azure Storage Accounts, Azure Key Vault, Azure API Management, Azure Monitor & Application Insights
• Experience with AWS Services (nice To Have): AWS Lambda, ECS / EKS, S3, RDS, API Gateway, CloudWatch, IAM
• Experience with Docker and containerized applications
• Knowledge of Kubernetes (AKS/EKS) is a plus
• Experience with CI/CD pipelines using Azure DevOps, GitHub Actions, GitLab CI, or similar tools
• Understanding of Clean Architecture, SOLID principles, Design Patterns, and Domain-Driven Design (DDD)
• Familiarity with messaging and event-driven architectures (Kafka, RabbitMQ, Azure Service Bus)
• Experience with monitoring, logging, and observability tools
• Knowledge of Infrastructure as Code (Terraform, Bicep, or CloudFormation) is a plus
• Fluent in English

What We Value

• Critical thinking and autonomy
• Ownership mindset
• Passion for technology and continuous learning
• Focus on meaningful solutions and measurable outcomes
• Collaboration, transparency, and knowledge sharing

What You’ll Find at Fyld

• A collaborative environment where your growth matters
• Access to continuous learning, training, and certifications
• Exposure to modern cloud-native architectures and technologies
• Challenging international projects with real business impact
• A culture of proximity, respect, and recognition
• High standards, professionalism, and dedication — the foundation of our game