Fullstack Developer (m/w/d)

As a Fullstack Developer, you will own product features end-to-end, from technical design and implementation to deployment, monitoring, and continuous improvement. You will work closely with Product, Design, and Engineering to build reliable, scalable, and user-focused solutions across backend and frontend.

• Design and build new product functionality end-to-end.
• Own features from scoping and technical design through implementation, testing, deployment, and maintenance.
• Contribute to architecture decisions and modernise or simplify existing systems.
• Develop reliable software through automated testing, code reviews, observability, and CI/CD.
• Ensure safe and backwards-compatible API changes, database migrations, and releases.
• Collaborate with Product Managers, Designers, and Developers throughout the development lifecycle.
• Improve product usability, performance, reliability, and development efficiency based on feedback and metrics.
• Maintain and improve the existing platform, including reducing technical debt and addressing performance or scalability issues.
• Understand and debug interactions between frontend, backend, databases, asynchronous processes, external services, and infrastructure.

• 3+ years of professional software development experience with strong production experience across backend and frontend.
• Strong proficiency in PHP, with solid JavaScript/TypeScript skills and hands-on experience with Vue.js.
• Fluent English (at least C1) - English is the team working language. German is a big plus.
• Experience building and maintaining REST APIs and integrating external services.
• Strong knowledge of relational databases, SQL, data modelling, indexing, and query optimisation.
• Understanding of asynchronous processing, queues, background jobs, and scheduled tasks.
• Experience with automated testing across backend and frontend.
• Strong understanding of software architecture, maintainability, performance, scalability, and distributed systems.
• Practical knowledge of authentication, authorisation, web security, and secure handling of user data.
• Experience working with and improving a mature codebase, including independently analysing technical problems and proposing pragmatic solutions.
• Experience taking features from requirements through implementation and into production, including deployment and production debugging.

• Performance-related pay with direct participation in the success of your work
• 30 days vacation per year
• A bright, spacious office in the heart of Berlin (near Moritzplatz)
• A home office arrangement with flexible days (home or office)
• A current MacBook Pro and modern equipment (incl. external monitor, keyboard, laptop stand, etc.) - for home office AND office
• An additional EUR 500 budget to set up your home office so that you can work productively
• Free lunch twice a week and fresh fruit in the office for the whole team
• Professional guidance, insights and training in the various topics and tasks as well as in the internal processes of our company
• Working a fast-growing B2B online company in the heart of Berlin
• Short official channels, quick decisions and a lot of responsibility
• A very focused company with high customer and employee satisfaction
• A relaxed, yet challenging and supportive working atmosphere