Senior Developer

Senior Developer (.NET) – Electronic Trading Domain: Fixed Income Electronic Trading Location: Brazil Employment Type: (Contract ) Job Summary Santander Global Technology is launching a greenfield initiative to enhance its electronic trading platform within SCIB Fixed Income. Working closely with trading teams in London and Spain, the selected candidate will help build a cloud\-based trading platform on AWS as part of a multi\-year strategic program. This role requires a Senior .NET Developer to design and build high\-performance electronic trading and pricing workflows in a small, agile team. The ideal candidate will have strong experience in .NET Core, microservices, cloud architecture, and event\-driven systems. Key Responsibilities • Take ownership of end\-to\-end software delivery ensuring quality and scope expectations are met • Contribute to architecture, technical design, and system documentation • Build scalable electronic trading and pricing services • Work closely with trading business stakeholders and partner technology teams • Design and develop microservices and API\-based solutions • Implement best practices for code quality, testing, and CI/CD • Develop high\-performance multi\-threaded and asynchronous applications • Participate in Agile ceremonies and iterative delivery cycles • Ensure production readiness, observability, and resiliency of services Required Technical Skills • Strong experience with .NET / .NET Core • Solid understanding of Object\-Oriented Programming (OOP) principles • Experience building ASP.NET Core Web APIs and RESTful services • Strong experience with multithreading \& asynchronous programming • Experience with SQL and NoSQL databases • Hands\-on experience with Docker / containerization • Experience building Microservices / Service\-Oriented Architectures • Automated testing experience (NUnit, Moq, Cucumber) • Messaging middleware experience (RabbitMQ, TIBCO, SignalR) • CI/CD tools experience (Git, TeamCity, Jenkins or similar) • Strong understanding of Agile / SDLC methodologies