(Senior) Fullstack Engineer (w/m/d) - Berlin

<h2><strong>Vision and intuition vs. testing and validating</strong></h2><p>Remember when software still felt magical? Good software used to be an experience. It used to radically change how we live and work. It made us feel like we lived in the future.</p><p>Today, software is everywhere. But truly great software has become incredibly rare - especially in the real estate industry. Most software at the end of the 90s and has barely updated since. Most software companies in the space make their money not with licenses - but with seminars teaching how to use the software. This leads to an ugly incentive to make software more complicated to sell more seminars.</p><p>At Buena we are going back to the essentials that lead to category-defining companies: courageous, first-principled, visionary products. In doing so we step away from the incremental testing-culture that gets all too easily stuck on local maxima.<br/><strong></strong></p><h2>Technical Stack &amp; Requirements</h2><p>At Buena, we work with a modern tech stack and prioritize expertise in cutting-edge tools and practices. We’re looking for a curious, well-rounded professional with solid experience in building large-scale applications and an open-minded approach to software development. As we grow rapidly, you’ll have the chance to influence key decisions shaping Buena’s future. Bring your expertise to unlock innovation and drive our next phase of growth.</p><p><strong>Basic Qualifications</strong><br/></p><ul> <li>4+ years as a Software Engineer, building complex, large-scale web applications using Node.js, TypeScript, React, GraphQL, HTML, and CSS.</li> <li>Proficiency with modern JS frameworks; we currently use Next.js &amp; Nest.js</li> <li>A passion for delivering high-quality, robust software and systems.</li> <li>Exceptional communication and collaboration skills, enabling productive partnerships across all levels, from junior engineers to senior executives.</li> <li>Strong understanding of web UI design principles, patterns, and best practices.</li> <li>Proven ability to work effectively with product and design teams.</li> <li>Dedication to creating intuitive, high-quality web UI experiences.</li> </ul><p><strong>Bonus Qualifications</strong><br/></p><ul> <li>Infrastructure as Code (IaC): Familiarity with tools like Terraform, Pulumi, or AWS CloudFormation.</li> <li>DevOps: Experience with CI/CD pipelines, Docker, Kubernetes, and other DevOps tools.</li> <li>Event-Driven Systems: Knowledge of pub/sub patterns with tools like Kafka, RabbitMQ, or Google Pub/Sub.</li> <li>Monitoring &amp; Observability: Proficiency with tools such as BetterStack, Prometheus, Grafana, or New Relic for system monitoring and performance optimization</li> <li>Hands-on experience with the Go programming language.</li> </ul><h2><strong>What you’ll do</strong></h2><ul> <li>Design and build end-to-end features, from data models to UI components, that simplify complex workflows for property management teams.</li> <li>Architect and maintain a scalable, maintainable codebase that grows with our product and user needs.</li> <li>Improve performance and optimize systems to handle high volumes of data with speed and accuracy.</li> <li>Collaborate with product managers and designers to deliver innovative, user-centric solutions.</li> <li>Ensure reliability and scalability by implementing robust monitoring, logging, and alerting systems.</li> <li>Mentor and guide engineers across the team to uphold a culture of technical excellence.</li> </ul><h2></h2><ul> </ul><h2><strong>What we’re looking for</strong></h2><ul> <li>Strong fundamentals in JavaScript/TypeScript and deep experience with React.</li> <li>Proficiency in building and maintaining scalable backend systems (Node.js, PostgreSQL).</li> <li>Familiarity with designing GraphQL APIs and optimizing them for performance and usability.</li> <li>Experience with modern dev tooling and cloud infrastructure (Docker, Kubernetes, CI/CD pipelines).</li> <li>A passion for clean, maintainable, and testable code.</li> <li>Ability to work autonomously while contributing to a highly collaborative team environment.</li> <li>A desire to continually learn and stay at the forefront of technology.</li> </ul><h2></h2><h2><strong>What we offer</strong></h2><ul> <li><strong>Competitive Compensation:</strong> A competitive salary paired with meaningful equity and employee-friendly terms.</li> <li><strong>Generous Time Off:</strong> Enjoy 5 weeks of paid vacation, public holidays, and additional leave for significant life events.</li> <li><strong>Premium Work Setup:</strong> High-spec MacBook Pro, Apple Studio Display, height-adjustable desk, and a beautifully designed office in the heart of Berlin.</li> <li><strong>Hybrid Work Flexibility:</strong> Work primarily on-site in our Berlin HQ, with up to 60 days of remote work per year. </li> <li><strong>Housing Support:</strong> Up to €500 monthly stipend to help you live close to our Berlin HQ.</li> <li>