Senior Fullstack Software Developer (m/f/d) AI Solutions, InsurTech Health insuranceHamburg At a glance Senior About this job Shape the future of digital insurance comparison with CHECK24. At CHECK24, we drive innovation in the world of insurance with passion and state-of-the-art technology. Our goal: Germany's best insurance comparison - simple, fair and transparent. With state-of-the-art tools, modern architectures and AI technologies (LLMs, machine learning & Co.), we develop smart features that offer millions of customers real added value. In agile, cross-functional teams, we live fast decisions, flat hierarchies and real team spirit. Do you not only want to develop software, but also shape the future of InsurTech with AI innovations? Then start now as a Senior Fullstack Software Developer (m/f/d) at CHECK24 Krankenversicherungen GmbH! What you bring with you Completed studies in computer science, natural sciences or a comparable technical degree program required Several years of professional experience in software development (at least 4 years) - ideally in agile environments Sound knowledge of at least two programming languages and relational databases Practical experience with Symfony and/or React Analytical thinking, self-motivation and a desire for new things and responsibility Very good knowledge of German (C1), team spirit and desire to work in a team on site in the office Your tasks will include Continuously develop our applications and ensure quality, stability and scalability through clean, performant code Work across the entire stack - from frontend (React) to backend (Symfony, REST APIs) to databases & platform components. Integrate production-ready AI functionality (LLMs) into existing and new features Optimize and scale our system landscape for performance, stability and availability Ensure high quality through code reviews, automated tests and CI/CD pipelines Take ownership of features or sub-components - both professionally and technically - and actively contribute new ideas What we offer you The best of both worlds: CHECK24 cultivates a presence culture and combines all the advantages of an established company with start-up flair. We plan for the long term, and at the same time you have the opportunity to actively help shape processes Personal growth: Experienced colleagues (m/f/d), dedicated contact persons (m/f/d) and our team spirit guarantee optimal onboarding. Specialized personnel development and an extensive training catalog promote your individual career. Regular retrospectives serve the continuous development of our cooperation Attractive salary package: We also offer attractive vouchers for a variety of CHECK24 products, generous support for the company pension scheme and very good cost sharing in the EGYM Wellpass Food & drinks: Free breakfast throughout the working week (choice of different cereals), free office lunch, fresh fruit, hot and cold drinks at your free disposal are a matter of course with us! Sustainable mobility: Our central location in the heart of Hamburg makes it easy to travel to work by public transport or bike - we offer you a 100% free Germany ticket or subsidize your company bike leasing Comprehensive health package: A flexible health budget and the opportunity to take part in our joint sporting activities (e.g. soccer, Alster runs, back fitness - in summer also on the roof terrace) Work-life balance: We work closely together on site from Monday to Thursday. On Friday there is the option to work remotely. In addition to 28 days of vacation, you can take up to 10 days of unpaid leave with us CHECKito spirit: As we attach great importance to a good working atmosphere in our office, you can expect a relaxed working atmosphere with an informal culture, regular drink-outs and cool team events. For breaks, there is a table tennis table, table football, our barbecue on the roof terrace and the unique view over the Outer Alster lake We equip you: Ergonomic workplace with modern equipment (such as a powerful MacBook Pro, additional screens) and height-adjustable desk from day one. Individual equipment such as an ergonomic mouse or noise-canceling headphones? No problem at all! Do you have any questions? Maike Eckert Recruiting Maike.Eckert@check24.de Please only send us applications online via our application form.