3. Rewritten Job Description (professional, enterprise-grade, global English)

Below is a polished, high‑impact version.

Senior .NET Developer – Electronic Trading

We are seeking a highly skilled Senior .NET Developer to join a greenfield initiative within Santander’s Global Technology division, supporting the Fixed Income electronic trading business. Working in a small, senior engineering team, you will design, build, and deliver a cloud‑based trading platform that supports global pricing and trading workflows. This project is sponsored at senior levels and offers the opportunity to shape a next-generation solution from the ground up.

You will work closely with trading stakeholders in London and Spain, ensuring high-quality delivery using modern engineering practices, cloud technologies, and robust CI/CD.

Responsibilities

• 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, applying best practices for API design and microservices.
• Work with partner technology teams to deliver integrated, scalable solutions.
• Implement automated testing, CI/CD, and code quality standards.
• Develop solutions involving multithreading, asynchronous programming, and messaging middleware.
• Containerize services using Docker and support cloud-based deployments in AWS.

Required Technical Skills

• Deep expertise in C#/.NET and .NET Core, with strong understanding of OOP principles.
• Experience building RESTful APIs and service-oriented/microservice architectures.
• Strong understanding of multithreading and async/await patterns.
• Experience with SQL and NoSQL databases.
• Hands-on experience with Docker and containerized applications.
• Strong background with messaging middleware (RabbitMQ, TIBCO, SignalR, etc.).
• Experience with automated testing frameworks (NUnit, Moq, Cucumber, etc.).
• Solid experience with CI/CD tools (Git, TeamCity).
• Strong understanding of the full Agile SDLC.

Nice to Have

• Knowledge of Fixed Income products.
• Experience configuring CI/CD pipelines.
• Exposure to modern JavaScript SPA frameworks.
• Experience working with AWS services.

Qualities & Soft Skills

• Highly motivated, energetic, and delivery-oriented.
• Strong analytical and problem-solving skills.
• Adaptable to a wide range of technical responsibilities.
• Excellent verbal and written communication skills.
• Ability to manage workload effectively and work independently.

Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or equivalent experience in advanced software delivery.