Siemens
Building X.

Energy data is only valuable when people can act on it. Building operators, energy managers, and sustainability teams need to see how consumption behaves across sites, compare it against targets, and share results with stakeholders. As Energy Manager grew, Siemens needed to expand its analytics, configuration, and reporting capabilities quickly, while keeping the product reliable for customers already using it in production.

The environment made this demanding. Energy Manager is one application inside the broader Building X platform. It shares components, services, and design standards with other Siemens applications, so every change had to respect platform-wide conventions and avoid side effects elsewhere. Large time-series datasets required careful attention to performance. Enterprise security standards set a high bar for code quality, and legacy views had to be retired without disrupting existing users. Siemens needed a delivery partner that could work inside this ecosystem rather than around it.

Leavingstone joined as a dedicated product and engineering team embedded in Siemens' Energy Manager delivery. Rather than handing over isolated tickets, we took end-to-end ownership of feature areas: from clarifying the problem with Siemens stakeholders, through requirements and refinement, to implementation, testing, and release notes. Our team combined product management, product ownership, and business analysis with frontend and backend engineering, working in agile sprints alongside Siemens' product, architecture, and platform teams.

From a delivery standpoint, we worked within the Building X platform's architecture and the SIMPL UI design system, so new features looked and behaved consistently with the rest of the platform. We coordinated closely with other application teams whenever work touched shared components. Over time, our role extended beyond Energy Manager: Leavingstone now owns the product side of a new Reporting Framework, designed as a shared, configurable capability for multiple Building X applications.

A major focus was advanced data visualization for energy analytics. We extended the Trends module with a 3D chart view, helping users explore how energy data behaves across multiple dimensions. We also contributed to the modernization of analytics views, supporting the retirement of legacy Trends and Correlation pages in favor of a more consistent experience. For data-heavy views such as Diagrams, we analyzed how the frontend, calculation engine, and entity services interact under load, and worked with Siemens architects on direction for improving performance with many signals.

To reduce operational effort, we delivered Bulk Configuration, allowing users to configure many data points at once instead of one by one, and built CSV export so users can take data into their own tools. On the platform side, we set up the foundation for Portfolios on Angular with NgRx and SIMPL UI, and we lead the product side of the new Reporting Framework: a shared capability designed to replace Energy Manager's existing reporting and serve other Building X applications. Throughout, we treated quality and security as part of delivery, resolving Wiz and SonarQube findings and helping improve GitLab CI pipelines.

The result is a stronger Energy Manager with richer analytics, faster configuration, and more flexible data access for Siemens customers. New capabilities shipped through regular releases while the product stayed live for customers in production. Legacy views are being retired in a controlled way, reducing duplication and maintenance effort across the application.

Beyond individual features, the partnership grew in scope and trust. Leavingstone moved from feature delivery to owning a platform-level capability, the Reporting Framework, now designed to serve multiple Building X applications. Security remediation and CI improvements strengthened the foundation for continued development.