Backend Developer

About The Company The Weissenberg Group GmbH is a leading technology company dedicated to developing innovative software solutions that drive digital transformation across various industries. With a focus on cutting-edge AI integration and scalable backend systems, we strive to deliver high-quality, reliable, and future-proof technology to our clients. Our company culture emphasizes collaboration, continuous learning, and a commitment to excellence, fostering an environment where talented professionals can thrive and make a meaningful impact in the tech landscape. About The Role We are seeking a highly experienced Backend Developer with a passion for shaping the technological direction of AI-driven solutions. In this role, you will go beyond routine ticket handling and actively influence the architecture and design of scalable backend systems. You will leverage your extensive experience in backend development to create innovative solutions, making critical decisions regarding software architecture, APIs, data models, and system integrations. A key aspect of this position involves utilizing modern AI coding tools such as Codex, Claude Code, GitHub Copilot, or similar agents to enhance productivity and code quality. You will be responsible for developing modern AI-supported applications, integrating external systems, and working closely with product managers, domain experts, and fellow developers to turn technological possibilities into practical, deployable solutions. This role offers a unique opportunity to embed AI coding tools into daily development workflows, enabling faster, more efficient, and secure software delivery while maintaining high standards of code quality and security. Qualifications The ideal candidate will possess between 7 to 10 years of professional experience in backend development, with a solid understanding of software architecture, API design, database management, and automated testing. You should have proven expertise in at least one established backend technology such as Python, Java, C#, TypeScript, or Node.js. A thorough understanding of version control systems like Git, as well as CI/CD workflows, is essential. Additionally, you should have demonstrable experience working with AI coding agents such as Codex, Claude Code, or GitHub Copilot, including prompt engineering, context management, and quality assurance of AI-generated code. Strong ownership mentality, excellent collaboration skills, and the ability to transfer knowledge effectively are crucial. Proficiency in German is required, alongside good English language skills, to facilitate seamless communication within our diverse team. Responsibilities Your responsibilities will include designing and implementing complex backend solutions from initial concept through to production deployment. You will take ownership of software architecture, define API specifications, data models, and ensure seamless system integrations. A significant part of your role involves employing AI coding tools productively for tasks such as implementation, refactoring, testing, and troubleshooting. You will critically evaluate AI-generated code for quality, security, and maintainability, ensuring that standards are consistently met. Collaborating closely with product teams, domain experts, and fellow developers, you will help develop AI-enabled applications and services, integrating large language model (LLM) APIs and external systems. You will also contribute to establishing and maintaining development standards, best practices, and technological innovations within the team. Your expertise will help shape the future of AI-driven backend development, making a tangible impact on projects and organizational growth. Benefits We offer a comprehensive benefits package designed to support your health, growth, and well-being. You will have access to a €600 health budget for massages, glasses, and other health-related expenses, along with top-tier health insurance coverage for you and your family. To promote a healthy and active lifestyle, we provide fitness bonuses, quick access to medical specialists, and a digital health coach. Our flexible working arrangements include options for remote work and 30 days of vacation, ensuring a healthy work-life balance. We guarantee job security through permanent employment contracts and foster professional growth with ongoing training and development opportunities. Enjoy a relaxed and engaging work environment with team events, modern green office spaces, and additional perks such as discounts, parking facilities, fresh fruit, and beverages. Take advantage of online shopping discounts, company car options for professional and private use, environmentally friendly mobility solutions like JobRad leasing, and access to fitness and health services through EGYM Wellpass. We also offer programs like JobCar, sustainable E-Car leasing, and affordable hardware leasing via MeinMPP to support your personal and professional needs. Equal Opportunity Weissenberg Group GmbH is committed to creating an inclusive and diverse work environment. We believe that different perspectives and backgrounds foster innovation and drive excellence. We welcome applications from all qualified individuals regardless of gender, age, ethnicity, disability, sexual orientation, or background. Our hiring process is fair and transparent, and we strive to provide equal opportunities for growth and development to all employees. Join us and become part of a forward-thinking organization that values diversity, equity, and inclusion in every aspect of our work culture.