Job Summary: We are seeking candidates with ION Trading experience for a banking project, focused on technical development, backend implementation, and performance optimization. Key Points: 1. ION Trading experience (minimum 2 years) 2. Advanced knowledge of Java, Spring Framework, and databases 3. Backend development and ETL/producer-consumer optimization experience **Description:** ---------------- NS Group is recruiting candidates with ION Trading experience for a banking-sector project in hybrid mode (on-site presence required for 3 days per week in the Las Tablas area (Madrid)). **Requirements:** * Minimum 2 years of prior technical development experience with ION Trading. * Over 4 years of experience with programming languages and frameworks: Java, Spring Framework (Spring Boot, Spring Batch); databases: Oracle / SQL; DevOps and continuous integration tools: Git, Bitbucket, Jenkins. * Backend process development and performance optimization in ETL and producer/consumer models. * APIs: REST. Greater weight is placed on backend process development and performance optimization in ETL and producer/consumer models than on developing APIs that only manage CRUD models for management applications. * English (minimum B2 level). **Requirements:** --------------- * Minimum 2 years of prior technical development experience with ION Trading. * Over 4 years of experience with programming languages and frameworks: Java, Spring Framework (Spring Boot, Spring Batch); databases: Oracle / SQL; DevOps and continuous integration tools: Git, Bitbucket, Jenkins. * Backend process development and performance optimization in ETL and producer/consumer models. * APIs: REST. Greater weight is placed on backend process development and performance optimization in ETL and producer/consumer models than on developing APIs that only manage CRUD models for management applications. * English (minimum B2 level).