This is us At Avenga, we believe that human creativity empowers technology that matters. Operating globally, our 6000+ specialists provide a full spectrum of services, including business and tech advisory, enterprise solutions, CX, UX and Ul design, managed services, product development, and software development. This is the job In Argentina within the baking/fintech industry, we are actively seeking a Senior .NET Developer with an AI-first mindset to join our team. Your mission will be to design and develop high-performance backend microservices in both cloud and on-prem environments, leveraging cutting-edge AI tools to accelerate the development lifecycle while maintaining the highest standards of code quality and architectural integrity. This is you 5+ years of experience developing with .NET (version 8+) and microservices architectures. Solid experience with SQL Server and MongoDB (query optimization and design). Proficiency in building REST APIs and working with messaging systems. Hands-on experience with Docker and basic knowledge of Kubernetes. Advanced testing skills with a strong focus on unit and integration testing. Regular and critical use of AI tools for development (e.g., GitHub Copilot, Cursor). Experience with version control via GitHub and quality gates like SonarQube. Strong communication skills and the ability to work autonomously with a commitment to deliverables. Nice-to-have skills: Experience with Kafka or other advanced messaging queues. Knowledge of Apache NiFi for data routing and transformation. Familiarity with CI/CD environments (Azure DevOps, Jenkins). This is your role Design and develop robust microservices in .NET 8+, applying an AI-first approach for coding, refactoring, and analysis. Collaborate with Business, QA, and Development teams to accelerate requirement refinement and technical solutioning. Optimize system performance, code quality, and maintainability with AI assistance while ensuring SOLID principles. Design and optimize complex queries in both relational (SQL Server) and non-relational (MongoDB) databases. Integrate AI into the entire development lifecycle, including automated testing, documentation, and early issue detection in code reviews. Ensure a responsible and secure use of AI tools, validating and correcting outputs with critical thinking. Promote a continuous improvement mindset focused on high impact and technical excellence. At Avenga, everyone matters. We provide equal opportunities in recruitment, career development, and leadership, regardless of race, ethnicity, gender identity, sexual orientation, disability, age, religion, or any other characteristic. We are committed to fostering a work environment where our diverse community of employees, candidates, and business partners actively shapes our growth. By bringing together people from different backgrounds and experiences, we build a workplace where everyone feels free to be themselves while honoring the boundaries of others.