Senior .NET Developer (Electronic Trading)

TL;DR

Senior .NET Developer (Electronic Trading): Design, build, and deliver a cloud-based trading platform supporting global pricing and trading workflows with an accent on high-performance services, API design, microservices, and scalability. Focus on multithreading, asynchronous programming, messaging middleware, automated testing, and AWS deployments.

Company

Santander’s Global Technology division greenfield initiative for Fixed Income electronic trading, supported by hirify.global.

What you will do

• Take ownership of software delivery, ensuring quality, reliability, and scope alignment.
• Contribute to system architecture and produce clear technical documentation.
• Build high-performance services using .NET Core, RESTful APIs, and microservices.
• Collaborate with partner teams for integrated, scalable solutions.
• Implement automated testing, CI/CD pipelines, and code quality standards.
• Develop solutions with multithreading, async programming, and messaging middleware; containerize with Docker for AWS.

Requirements

• Deep expertise in C#/.NET Core and OOP principles.
• Experience building RESTful APIs and microservice architectures.
• Strong knowledge of multithreading and async/await patterns.
• SQL and NoSQL databases.
• Docker and containerized applications.
• Messaging middleware (RabbitMQ, TIBCO, SignalR).
• Automated testing (NUnit, Moq, Cucumber) and CI/CD tools (Git, TeamCity).
• Full Agile SDLC understanding.
• Bachelor’s degree in Computer Science or equivalent.

Nice to have

• Knowledge of Fixed Income products.
• CI/CD pipeline configuration.
• Modern JavaScript SPA frameworks.
• AWS services.

Culture & Benefits

• Work in a small, senior engineering team on a senior-sponsored greenfield project.
• Close collaboration with trading stakeholders in London and Spain.
• Modern engineering practices, robust CI/CD, and high-quality delivery focus.
• Opportunity to shape next-generation trading solutions from the ground up.