Senior .NET Backend Engineer – Microservices & Performance

Vortech PCI Group S.L.; España; On-site; EUR 65,000 - 90,000; Full time

Job summary

Vortech PCI Group S.L. seeks an experienced backend developer to design, build and maintain scalable services using C#, .NET Core and ASP.NET Core for an international greenfield electronic trading platform.

The role focuses on REST APIs, microservices, distributed systems and event-driven integrations, with emphasis on performance, reliability and CI/CD in a multinational team. English is the working language; location includes Spain and other European sites; you will join a technically

Qualifications

• 5+ years of professional software development with C# and .NET.
• Strong experience with .NET Core, ASP.NET Core and REST APIs.
• Proven experience with microservices and distributed systems.
• Strong knowledge of multithreading, asynchronous programming and concurrency.
• Experience with event-driven architectures and messaging technologies such as RabbitMQ, TIBCO, SignalR or equivalent.
• Experience with SQL and NoSQL databases.
• Knowledge of SOLID principles, Clean Architecture and design patterns.
• Experience with Docker, automated testing and CI/CD pipelines.
• Experience supporting and troubleshooting applications in production.
• Experience working in Agile environments.
• Advanced English.

Responsibilities

• Design, develop and maintain backend services using C#, .NET Core and ASP.NET Core.
• Build scalable REST APIs and microservices-based architectures.
• Develop distributed systems and event-driven integrations using messaging technologies.
• Implement multithreading, concurrency and asynchronous programming solutions.
• Optimise application performance, scalability and reliability.
• Work with SQL and NoSQL databases.
• Apply Clean Architecture, SOLID principles and software engineering best practices.
• Implement automated testing and contribute to CI/CD processes.
• Troubleshoot production issues and collaborate with international technical teams.

Skills

C#/.NET

ASP.NET Core

Microservices

REST APIs

Distributed systems

Multithreading

Messaging

SQL/NoSQL

Docker

CI/CD

English

Tools

RabbitMQ

TIBCO

SignalR

Job description

Vortech PCI Group S.L. seeks an experienced backend developer to design, build and maintain scalable services using C#, .NET Core and ASP.NET Core for an international greenfield electronic trading platform.

The role focuses on REST APIs, microservices, distributed systems and event-driven integrations, with emphasis on performance, reliability and CI/CD in a multinational team. English is the working language; location includes Spain and other European sites; you will join a technically