Location : mexico-monterreyjob type : contractor - onsite monday to fridayprofile: backend developer (knowledge of .net migrations) the objective of this positionis to execute the technological transition of legacy applications developed in.net framework 4.0towards a modern architecture based on.net 8, ensuring data integrity, system security and scalability through microservices.key responsibilities: application modernization:refactoring and migrating legacy code to .net 8 using best practices and design patterns. Architecture design:implementing and optimizing ecosystems based onmicroservices. Data management:optimize queries and schemas insql serverto ensure optimal performance post-migration. Security:implement bank/enterprise grade security standards (oauth2, openid connect, data encryption, etc.). Automation:collaborating with the development lifecycle throughci/cd in devops environments.technical requirements (must-have): solid experience:minimum 5-6 years in backend development. .net proficiency:proven experience migrating projects from older versions (4.0/4.5) to.net core or .net 8. Databases:advanced sql server (stored procedures, tuning, relational design). Microservices:real-world experience working with containers (docker), api gateways, and asynchronous communication. Devops:fluent use of azure devops, jenkins or github actions.### desirable: experience in the financial sector or handling of sensitive data.