Senior Backend Engineer .NET – Electronic Trading

Vortech PCI Group; Valencia; On-site; EUR 70,000 - 90,000; Full time

Benefits offered by this job

International project

Modern .NET stack

Collaboration with international teams

Job summary

Vortech PCI Group is seeking a Senior .NET Backend Engineer to join an international project in the financial sector, focused on building a greenfield Electronic Trading platform within the Fixed Income domain. The role requires strong C#/.NET, microservices and distributed systems expertise, in a hands-on senior capacity.

The candidate will design, develop and maintain backend services using C#, .NET Core and ASP.NET Core, build scalable REST APIs, implement event-driven integrations, and work

Qualifications

• 5+ years of professional software development experience, with strong expertise in C# and .NET.
• Solid 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

REST APIs

Microservices

Distributed systems

Asynchronous programming

Event-driven architecture

Multithreading

CI/CD

Docker

Agile

Advanced English

Tools

RabbitMQ

TIBCO

SignalR

AWS

Job description

About the job Senior Backend Engineer .NET – Electronic Trading

At Vortech PCI Group, we are looking for a Senior .NET Backend Engineer to join an international project in the financial sector, focused on developing a new Electronic Trading platform within the Fixed Income domain.

This is a greenfield project, involving the design and development of scalable, high-performance backend solutions using .NET and AWS.

We are looking for a hands‑on senior engineer with strong experience in C#, microservices, distributed systems, asynchronous programming and event‑driven architectures.

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.

Requirements

• 5+ years of professional software development experience, with strong expertise in C# and .NET.
• Solid 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.

NICE TO HAVE

• Experience in Financial Services, Fixed Income or Electronic Trading.
• Knowledge of trading platforms, pricing systems or RFQ workflows.
• Experience with AWS.
• Knowledge of Infrastructure as Code (IaC) and observability tools.
• Experience with JavaScript and SPA frameworks.

WORKING CONDITIONS

• Location: Spain, Portugal, Poland or United Kingdom.
• Project: International greenfield Electronic Trading platform.
• Working language: English.

What We Offer

• International project within the financial sector.
• Opportunity to build a new trading platform using modern .NET technologies.
• Technically challenging environment focused on distributed systems, scalability and performance.
• Collaboration with experienced international engineering teams.
• Active involvement in technical design and architectural decisions.
• Close support throughout the recruitment process.

Aplicamos los principios de No discriminación e igualdad en todos nuestros procesos de selección. De conformidad con el Reglamento (UE) 2016/679, la Ley Orgánica 3/2018 y demás normativa vigente en materia de protección de datos, le informamos de que sus datos serán tratados por Vortech PCI Group S.L. con la finalidad de participar en procesos de selección. Para ejercer sus derechos de acceso, rectificación, cancelación y oposición, puede escribir a [e-mail].