About WALLROUND WALLROUND is a thriving PropTech startup on a mission to revolutionize energy renovations for landlords in Germany and beyond. We're using cutting-edge technology to make the journey to net-zero buildings simpler, more profitable, and efficient for everyone involved.We're proud to be backed by Vonovia, Europe's leading private residential real estate company, and Founders Factory, a global venture building powerhouse. Together, we're creating an AI-powered, end-to-end retrofit solution that's changing the game in sustainable building transformation.Our goal? To take the headache out of energy-efficient renovations, empowering landlords to make a real difference in the fight against climate change while boosting their property values. Role Description As Founding Engineer, you will play a pivotal role in developing our core technology platform. You’ll work across the entire tech stack to design and implement scalable solutions that drive efficiency and innovation in our operations, working closely with Wallround’s founding team, especially the CPO and CEO. This is an opportunity to tackle complex technical challenges while shaping the technical foundation of a fast-growing startup. Key Responsibilities Full Stack Development: Build end-to-end solutions, from database architecture to user interfaces, using modern technologies. System Architecture: Contribute to strategic decisions on system design and scalability. Performance Optimization: Identify and resolve bottlenecks across front-end and back-end systems. AI & Automation: Leverage state-of-the-art AI tools to enhance development efficiency. API Development: Design and implement RESTful APIs for platform functionality and third-party integrations. DevOps & CI/CD: Support DevOps practices by setting up and maintaining CI/CD pipelines. Code Quality: Uphold high standards through code reviews, testing, and adherence to best practices. Leadership: Build your own technical team from the ground up and act as a mentor to junior developers as the team scales Agile Practices: Actively participate in agile workflows like sprint planning and retrospectives. What we are looking for Experience: 5 years in full stack development with a proven track record of delivering complex applications. Technical Skills: Proficiency in React, Node.js, TypeScript, and cloud platforms (preferably AWS).Database Expertise: Strong knowledge of SQL and NoSQL databases. System Design: Ability to architect scalable systems with distributed components. Problem-Solving Skills: Analytical thinker with excellent debugging capabilities. Agile Mindset: Comfortable working in fast-paced environments with changing priorities. Communication Skills: Fluent in English (German preferred) with the ability to explain technical concepts clearly. Continuous Learning: Passionate about staying updated on emerging technologies and best practices. Automation & AI Interest: Knowledge of, or at least a strong interest in identifying opportunities to automate processes and leverage AI solutions for development. Bonus Points: Interest in PropTech, sustainability, or real estate is a plus Why join us Be a founding member of the tech team, shaping the technical direction of a fast-growing startup. Work on cutting-edge technology with direct impact on sustainability goals. Collaborate with a forward-thinking team in Berlin at the intersection of tech and climate innovation. Enjoy competitive compensation with potential equity opportunities as part of our growth journey. Let’s create a more sustainable future together