(Senior) Software Engineer Marketplace (m/f/d)

<h2>Your Tasks</h2> <ul> <li>Development and maintenance of scalable backend services using NestJS, Node.js, and TypeScript</li> <li>Design and optimization of performant MongoDB schemas, including indexing strategies for large-scale datasets</li> <li>Implementation of robust REST and GraphQL APIs, background workers, and job queues with BullMQ</li> <li>Ownership of the complete software lifecycle: development, testing, monitoring, and continuous improvement</li> <li>Creation of meaningful unit, integration, and end-to-end tests with a focus on validation and reliability</li> <li>Consideration of architectural implications, edge cases, and cross-system integrations in all implementations</li> <li>Collaboration with engineering and product teams through proactive communication of progress, blockers, and trade-offs</li> <li>Contribution to architectural enhancements and system scalability</li> <li>Knowledge sharing and mentorship through code reviews and guidance</li> </ul><h2>Your Profile</h2> <ul> <li>Strong backend engineering expertise with a focus on TypeScript, Node.js, and NestJS</li> <li>Practical experience in MongoDB schema design and data scalability</li> <li>Demonstrated ownership mindset, with a focus on clean, maintainable solutions and critical thinking</li> <li>Emphasis on testing practices, technical documentation, and team-wide communication</li> <li>Familiarity with modern infrastructure, including CI/CD pipelines, Kubernetes, Grafana, and Prometheus</li> <li>Solid understanding of API design principles and experience with event-driven systems (e.g., Google Pub/Sub)</li> <li>Bonus: Frontend development experience with React and Next.js</li> </ul><h2>About Us</h2> <p>MediaMarktSaturn Technology is working to make Europe’s number-one consumer electronics retailer the technology leader in its industry. To this end, several hundred developers, UX designers and system architects using state-of-the-art technology work hand in hand with business owners in agile teams to develop customer-focused technology solutions for more than 6 million customers every day in 11 countries. </p><h2>Additional Benefits</h2> <h2>Job Infos</h2> <p>​Location: Ingolstadt, München</p> <p>MediaMarktSaturn Technology</p> <p>Department: HQ - IT</p> <p>Entrylevel: Professional Level</p> <p>Type of Employement: Full Time</p> <p>Working Hours: 37,5</p> <p>Persona: Job Requisition Tech Employee</p> <p>Recruiter: Laura Schröder </p> <p>Recruiter: Laura Schröder </p>