• Develop and evolve critical back-office applications • Build complex, high-performance interfaces in Angular • Design and implement scalable APIs and services • Contribute to architectural decisions and best practices • Work on resolving highly complex issues

• Design and lead development of the native Rust backend, including APIs, microservices, and system architecture. • Integrate and manage real-time messaging infrastructure using WebSockets and event-driven services. • Oversee the Solana-based OleX token, including smart contract development, wallet logic, and payments architecture. • Build the backend framework for AI-powered features, including translation, recommendation engines, and user content analysis. • Ensure security, scalability, and performance across all systems, especially in crypto and gambling environments. • Partner with the CEO and broader team to align technical goals with the company’s global vision.

Role Description Design, develop, and maintain robust, scalable backend services that support and enhance BASF Coatings’ internal and external applications. - Work in an agile, self‑organized team and collaborate effectively with colleagues. - Develop new backend functionality using Java and Spring Boot, following modern backend engineering principles and best practices. - Maintain and improve existing backend services, ensuring performance, reliability, and long‑term maintainability. - Design, implement, and evolve RESTful APIs and service interfaces to enable seamless integration with frontend applications and other systems. - Write clean, maintainable, and efficient code in line with team coding standards and industry best practices. - Contribute actively to planning, refinement, reviews, operations, and continuous improvement activities within the team. - Collaborate closely with frontend developers to ensure smooth data flows, clear API contracts, and consistent end‑to‑end behavior. - Implement and maintain unit, integration, and component tests to ensure high quality, stability, and regression prevention. - Share responsibility for operations and maintenance as part of the team’s DevOps mindset, including monitoring, troubleshooting, and continuous optimization. - (Nice to have) Show interest in frontend technologies such as Angular and full‑stack development, with opportunities to collaborate across the stack if desired. Qualifications - Bachelor’s Degree in Computer Science, Software Engineering, or comparable practical experience. - Around 3-5 years of professional experience with Java (≥ 21) and building backend applications in production environments. - Strong hands‑on experience with Spring Boot (3.x) and core Spring modules such as Spring Data, Spring Integration, Spring Batch, and Spring Security. - Solid understanding of persistence technologies, including JPA 2 / Hibernate, and designing robust data access layers. - Experience designing, implementing, and maintaining RESTful APIs for microservice‑based systems. - Good knowledge of SQL databases, ideally PostgreSQL, including data modeling and query optimization. - Experience writing unit and integration tests (e.g., JUnit or similar frameworks) to ensure code quality and stability. - Familiarity with microservice and cloud architectures, including service communication and API‑based integration. - Experience working with containerization technologies such as Docker; exposure to Kubernetes is a plus. - Proficiency with JetBrains IntelliJ IDEA or comparable Java IDEs. - Familiarity with agile methodologies (Scrum or Kanban) and working in agile development teams. - Strong communication skills in Spanish and English, both verbal and written. Benefits - Continuous training and professional development with our internal vacancies. - Safe environment where we promote your health. - Subsidized canteen on site. - Free bus service from the company Alcalá-Marchamalo. - Competitive economic offer with a base salary plus a variable for good performance. - Home office* and adapt your schedule according to your circumstances. - Connect outside the office and practice sports with colleagues through company groups. - Flexible remuneration that you can voluntarily allocate to transportation services, training, childcare, etc. - Pension plans, life and accident insurance, personal loans and participation in company stock programs. - Financial aid for schooling and other measures for families. How to Participate in the Process Send your CV through the job offer so we can get to know each other. If your profile matches, we will call you from the Spanish Talent Acquisition team in Germany (prefix +49) and support you throughout the process. With each step, you will be closer to meeting your future team!

• Actively contribute to the development and enhancement of our backend software solutions for Opus::L • Modernize our system architecture by integrating and advancing core system components, including connecting to ActiveMQ, replacing existing CORBA structures, and implementing modern REST services • Work with other backend technologies and scripting languages used in the product environment — in particular TCL and Shell/Bash scripting • Support technical development and continuously optimize the software • Analyze requirements and work closely with product management • Implement and test new features with a focus on quality, performance, and usability • Troubleshoot, debug, and maintain existing software components • Document developed solutions and technical processes