Own the Backend. Build for Scale. Make an Impact. We’re looking for a Senior Backend Engineer to join our Sparrows Team. If you enjoy solving tough technical problems, building reliable services, and working in a collaborative environment — this is the role for you. We are Doodle Doodle is the world’s leading scheduling platform, helping millions of people instantly set meetings with clients, colleagues, and teams. Tapping into the unique nature of smart scheduling, Doodle simplifies the planning of 1:1 and group meetings for busy professionals. As the world's most trusted online scheduling platform, Doodle attracts more than 25 million visitors each month. Doodle is headquartered in Zurich, with offices in Belgrade and Berlin and some colleagues working remotely from the US. What You’ll Do Build powerful backend services. Work primarily with Java (Spring Boot) and Node.js to develop, test, and optimize scalable backend solutions. Solve real-world problems. Use your analytical skills to tackle challenges head-on and create software that just works. Own the data flow. Design RESTful APIs, optimize database queries (SQL), and master ORM technologies like Hibernate. Write high-quality code. Implement unit, integration, and load tests, while maintaining rock-solid security and performance standards. Simplify deployments. Automate CI/CD pipelines and optimize service deployment into test and production environments. Bonus points if you know Kubernetes (k8s). Explore AI tools. Discover and implement AI-powered solutions to make software development smarter, faster, and more efficient. Work with the best. Collaborate with product managers, frontend engineers, designers, and data analysts to turn ideas into reality. What You Bring Deep expertise in Java & Spring Boot (Spring Data, Spring Security, etc.) Strong experience with Kafka (big plus) Hands-on experience with Node.js Experience with AI for coding Solid understanding of authorization servers (bonus) Proven skills in writing high-performance database queries Familiarity with Nest.js and Next.js (nice to have) Experience with containerization technologies like Docker Open-minded and eager to learn new technologies and ways of working. Strong communication and collaboration skills. Adaptable and comfortable in fast-changing environments. Why You’ll Love It Here Compensation & Financial Well-being Competitive Pay – We pay fair for top talent. Pension Plan – Set yourself up for the future. Flexible & Hybrid Culture Hybrid Work – Work where you're most productive (within Germany). 30 Vacation Days – Take the time you need to rest and recharge. Summer Fridays (Pilot) – Shorter summer workweeks, same full pay. Work-from-Anywhere – Go remote for up to 3 months in the EU and 1 month outside the EU. Learning & Career Growth 4 Training/Conference Days – Invest in yourself. Learning Stipend – We cover courses, certifications, and more. Well-being & Home Office Setup Well-being & Home Office Budget – Use it for fitness, therapy, or your dream desk setup. Headspace Membership – Access guided meditation & mindfulness tools. Company Lunches & Team Events – Stay connected, even remotely. Family & Inclusive Benefits Parental Leave & Support – Paid leave for all caregivers. Extra Perks Doodle Premium – Free for you, your family, and friends. Top-Notch Equipment – MacBook, keyboard, trackpad—work at your best. Hiring Journey Initial Application Review Personality & Strengths Assessment (via BRYQ) Culture Fit Conversation Hiring Manager Chat Coding Challenge Technical Deep Dive Meet the Team Final Offer & Next Steps At Doodle, we’re committed to providing an environment of mutual trust and respect, where equal employment opportunities (EEO) are available to all applicants and teammates without regard to age, race, color, disability, religion, gender, and sexual orientation. Diversity and inclusion are of utmost importance to us. We’re committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better our work and our products will be. We want to hear from you, so please don’t hesitate to apply We look forward to receiving your full application. IMPORTANT NOTICE: Please note that we can only consider your application if you are based and have the right to work in Germany. At this time, we are unable to sponsor visa for this position or support with relocation.