About Us Ready for a challenge and adventure? At XYZ Reality, we are a well-established, award-winning Series-A startup accelerating toward our next funding round. Our mission is to expand our platform, enhancing features, performance, and scalability while revolutionizing the construction industry. We are a multi-disciplinary, fast-paced company working across diverse domains, including cloud development, electronics, embedded software/hardware, mechanical design/manufacturing, AI & computer vision, and data science—all powering our BIM Platform. To drive this mission, we are seeking a Backend Engineer experienced in Node.js to support our transition from Java to Node.js and build high-performance, scalable backend services. You will work closely with our API development team, client apps teams, and data pipeline team to create robust and efficient solutions. Our office is in central London, just a short walk from Angel Station. Responsibilities · Design, develop, and maintain scalable backend services using Node.js. · Write efficient SQL queries and optimize database performance. · Build and maintain RESTful APIs with best practices for scalability and performance. · Debug and maintain the existing API codebase. · Develop and execute unit tests and integration tests to ensure software reliability. · Conduct performance profiling and stress testing to optimize system responsiveness. · Maintain clear, structured documentation for backend systems and codebases. · Collaborate closely with cross-functional teams, including client applications and data pipeline teams. · Stay adaptable, learning new technologies and contributing to various technical areas as needed. Required Skills & Experience · Bachelor’s degree in computer science or a related field. · Strong Node.js programming skills with experience in backend development. · Solid experience with relational databases, particularly PostgreSQL. · Expertise in designing and developing scalable RESTful APIs. · Strong debugging, troubleshooting, and performance optimization skills. · Proficiency with Git, including active participation in code reviews. · Excellent communication skills in both written and spoken English. Preferred Qualifications · Experience with Java and Java frameworks (to support legacy migration to Node.js). · Familiarity with CI/CD pipelines, such as GitHub Actions. · Knowledge of GraphQL or other API design methodologies beyond REST. · Experience with Docker and Kubernetes for container orchestration. · Experience in Test-Driven Development (TDD) and software design patterns. What We Offer · A research-driven, innovative environment with opportunities to experiment and grow. · A collaborative and supportive team culture that values continuous learning and knowledge sharing. · Exposure to cutting-edge technologies in cloud development and high-performance scalable architectures. · If you're passionate about solving complex backend challenges and want to be part of an ambitious, fast-growing start-up, apply now!