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Join the Consumer Selling team at mobile.de and help empower our customers to sell their vehicles easily, successfully, and with confidence. As a Senior Fullstack Engineer, you’ll be a key problem solver and collaborator, working closely with a diverse group of frontend and backend engineers, a data scientist, a product manager, and a UX designer – together, you’ll take ideas from discovery to delivery. This means researching user needs, designing solutions, shipping features, and ensuring they run smoothly in production. You’ll contribute across the stack, influence product decisions, and help shape engineering practices to improve performance, maintainability, and developer experience.
Job Responsibility:
Collaborate actively with product, UX, business, and engineering peers
Help shape our product from initial planning to successful launch
Write clean, maintainable code with strong test coverage (unit, snapshot, and integration tests)
Ensure the quality of your product because you understand that quality is the responsibility of the entire team
Dedicate up to 30% of your time to maintaining code quality and driving platform improvements and best practices
Stay up-to-date with industry trends. Learn new tech and non-tech related skills to grow yourself and your team
Participate in design decisions, QA and code reviews
Communicate effectively and contribute to a culture of knowledge sharing and continuous learning
Requirements:
3+ years of professional experience as a Fullstack Developer (React, TypeScript, Java 21 with Spring Boot)
Experience working in multidisciplinary agile teams, with a strong sense of ownership that extends beyond deployment
Passion for writing clean, elegant code with a focus on simplicity and pragmatism
An ambition to follow the technology trends and apply new technologies to our technical stack
Strong communication skills and fluency in English
Proficient in backend development with Java 21, including hands-on experience with Spring Boot and Maven
Solid experience designing and building scalable, maintainable applications using microservices architecture
Expertise in developing and integrating RESTful APIs
Solid understanding of NoSQL databases, particularly MongoDB
Experience working with CI/CD pipelines (e.g., GitHub Actions)
Familiarity with distributed, event-driven architectures using Kafka
Proficient in JavaScript (and TypeScript), with a solid grasp of modern frontend development practices
Hands-on experience with React.js (and Next.js including SSR, API routes), and core concepts such as hooks, context API, and component lifecycles
Skilled in translating UI/UX designs from tools like Figma into responsive, pixel-perfect interfaces
Understanding of frontend performance optimization and cross-browser compatibility
Nice to have:
Experience with frontend testing tools like Jest, Cypress or React Testing Library is a plus
What we offer:
Recharge with 28 days of paid time off
Stay mobile with a €50 monthly transportation/mobility allowance
Keep growing with a development budget and access to coaching
Family first - enjoy up to 12 (non-birth parent) or 20 (birth parent) weeks of fully paid parental leave
Learn anytime, anywhere with our online and offline library
Get rewarded with an attractive base salary and participation in our annual incentive plans
Work from anywhere - up to 20 days per year from wherever you feel most productive
Prioritize your well-being with a 24/7 Employee Assistance Programme for you and your immediate family