OverviewSenior Software Engineer (Typescript/Next.js) at LeasingMarkt.de. Join our high-performance team in Düsseldorf to design and develop robust, scalable web applications powering one of the largest automotive leasing marketplaces in Europe.As a Senior Software Engineer, you will collaborate with a cross-functional team to build solutions that are effective, architecturally sound, and maintainable, elevating software quality, stability, and long-term value.What You’ll DoImprove and extend our existing codebase while maintaining a high standard of code quality and test coverage.Design and implement scalable, maintainable, and well-structured solutions based on modern architecture principles.Drive architectural decisions with a focus on modularity, clean code, and long-term maintainability.Work in an agile, cross-functional team, contributing ideas and pushing for continuous improvement.Set high quality gates for new modules, emphasizing testability and performance.Support and mentor other team members.What You BringStrong experience with TypeScript and modern React / Next.jsExperience with server-side rendering (SSR), static site generation (SSG), and API routes in Next.jsSolid understanding of performance optimization, caching, and CDN strategiesSolid understanding of component-based architecture, state management, and modern web APIsDeep knowledge of software design principles (e.g., SOLID, DRY, KISS)Passion for clean, testable, and maintainable codeFamiliarity with CI/CD pipelines, Git, and agile development practicesA collaborative mindset and willingness to share knowledge and best practicesExperience with or openness to PHP (Laravel) is a big plusExperience with cloud platforms (especially AWS) and containerization (Docker/Kubernetes) is a plusExperience with Tailwind CSS is a plusWhat We OfferAn experienced, friendly team with flat hierarchies and open communicationTwo days of remote work per week and flexible working hours30 days of vacation + Christmas and New Year’s Eve offOption for “workation”Modern office in the heart of DüsseldorfMuesli, fruit, and drinks included, including a portafilter machineGames corner (PlayStation, Switch, table tennis...)Company pension plan, job bike, corporate benefits, and moreIf you are interested in building your career at LeasingMarkt.de, we’d love to hear from you. #J-18808-Ljbffr