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Job Summary: Design and develop robust, scalable backend solutions using .NET technologies, modernizing existing systems and building new cloud-native solutions. Key Highlights: 1. Design of scalable backend systems for digital transformation 2. Modernization of legacy applications and cloud-native development from scratch 3. Collaboration in agile teams with a focus on technical excellence **Why SoftwareOne?** SoftwareOne and Crayon have joined forces to form a global AI-powered software and cloud solutions provider, with a bold vision for the future. With a presence in more than 70 countries and a diverse team of over 13\.000 professionals, we offer unparalleled opportunities for talent to grow, make an impact, and help shape the future of technology. People are at the heart of our business. We empower our teams to work without borders, innovate without fear, and continuously develop their skills through world-class learning and development programs. Whether you're passionate about cloud, software, data, artificial intelligence, or building strong customer relationships, you'll find a place here to thrive. Join us and become part of a purpose-driven culture where your ideas matter, your growth is supported, and your career can truly go global. **The role** Would you like to design scalable backend systems that drive real digital transformation? Do you enjoy modernizing legacy applications and building new cloud solutions from scratch? Are you motivated by clean code, technical excellence, and genuine collaboration? Location: León or Santiago de Compostela, Spain \| Work model: Hybrid \| Visa requirements: Valid work permit for Spain or Spanish citizenship \| Languages: Spanish \+ Intermediate-to-advanced English required. **Role Introduction** As our new Senior Backend Developer .NET, you will design and develop robust, scalable backend solutions supporting digital transformation projects across various industries. You will play a key role both in modernizing existing systems and in developing new cloud-native solutions. You will work closely with architects, frontend developers, DevOps engineers, and business stakeholders, contributing to technical decisions and ensuring maintainable, high-quality solutions with tangible business impact. **Key Responsibilities** * Design and implement scalable backend services using current .NET technologies * Participate in legacy application modernization projects and greenfield cloud development * Develop and maintain REST APIs and distributed architectures * Apply SOLID principles, Clean Code practices, and test-driven development * Contribute to architectural decisions and continuous technical improvements * Ensure code quality through automated testing and continuous integration * Collaborate within agile, cross-functional teams to deliver high-value solutions **What we need to see from you** * Required: + Solid experience with .NET Core and .NET Framework + In-depth knowledge of backend architecture and REST API development + Experience with SQL and NoSQL databases + Practical mastery of SOLID principles, Clean Code, and testing + Experience with Git-based workflows and collaborative tools + Strong communication skills in English * Preferred: + Knowledge of Domain-Driven Design (DDD) and event-oriented architectures + Experience working in cloud environments and CI/CD pipelines **What we offer** + Flat organizational structure where ideas count + Participation in real-world digital transformation projects + Collaborative, innovation-focused culture + Continuous learning and professional growth opportunities + Flexible work model with hybrid arrangement + A team committed to technical excellence and quality **Job Function** Services **Accommodations** SoftwareOne welcomes applicants from all backgrounds and abilities to apply. If you require reasonable adjustments at any point during the recruitment process, email us at reasonable.accommodations@softwareone.com. Please include the role for which you are applying and your country location. Someone from our organization that is not part of the decision\-making process will be in touch to discuss your specific needs and we will make every effort to accommodate you. Any information shared will be stored securely and treated in the strictest of confidence in line with GDPR. At SoftwareOne, we are committed to providing an environment of mutual respect where equal employment opportunities are available to all applicants and teammates without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws. Additionally, we encourage experienced individuals that have taken an intentional career break and are now prepared to return to work to explore our SOAR program.
