October 2025 performance and reliability sprint across Ultimaker/Cura and Ultimaker/CuraEngine. Delivered features and fixes aimed at more accurate build-volume calculations, faster extruder detection, stable painting workflows, and improved user and QA confidence. Highlights include centralizing extruder usage for build-volume integration, per-bounding-rectangle extruder count caching, and stability improvements in the PaintTool for multi-material painting, along with a targeted UX upgrade for printer authentication and robustness improvements in testing and logging.

September 2025: Delivered stability, security, and UX improvements across CuraEngine and Cura, with targeted features and critical bug fixes that reduce maintenance, improve cross‑platform reliability, and enhance user workflows. The work emphasizes up-to-date dependencies, robust authentication, and rendering/UX refinements to improve accuracy and perceived performance.

August 2025 monthly summary covering Ultimaker/CuraEngine and Ultimaker/Cura. Delivered build-system improvements to resolve MSVCP140.dll conflicts and cleanup in CuraEngine, reducing build failures. Completed major Paint Tool enhancements in Cura, improving stroke rendering accuracy, projection handling across planes, UV mapping, polygon fill reliability, and user interaction (brush preview and cursor behavior). Implemented Paint Tool performance and code quality improvements (camera caching, reduced parameter passing, and optimized barycentric/remapping calculations). Overall, these efforts improved reliability, user experience, and development velocity, supporting faster release cycles and greater business value.

July 2025 highlights: Delivered new capabilities for clearer material estimates and secure printer API access, and improved user feedback on extruder usage. Fixed critical Windows build blockers and robustness issues, including mesh reloading alignment and pyUvula integration. Overall this work enhanced cross-platform reliability, security posture, and developer confidence, enabling smoother manufacturing workflows and faster issue resolution.

June 2025 focused on strengthening painting workflows and enabling UV unwrapping support for 3MF, delivering tangible reliability and user-experience improvements in Ultimaker Cura. We stabilized the Paint Tool with crash fixes, degenerate geometry handling, and robust stroke propagation across multi-face and multi-texture scenarios, while refactoring brush shape from string to enum and modernizing input-event code and undo/redo UI. Additionally, we established foundational UV-unwrapping for 3MF files by wiring unwrapNewUvs in the mesh_builder, laying groundwork for more accurate texture mapping. These changes reduce user-reported issues, improve painting accuracy, and accelerate asset prep for printing, demonstrating solid C++/Qt UI and mesh-processing capabilities.

2025-05 monthly summary for Ultimaker/Cura focusing on business value and technical achievements. Delivered the UV painting workflow end-to-end with a new UV painting shader, initial paint-tool plugin UX, modular PaintView, brush controls, drag-to-paint, and enhanced rendering including undo/redo and stroke rendering. Implemented performance improvements through mesh transform caching and refined the painting pipeline. Refactored the PaintView into a modular component and added color/brush settings for a smoother UX. Strengthened reliability with improved error handling for file downloads, routing issues to on_error for user feedback.

April 2025 performance summary for Ultimaker Cura and CuraEngine, focusing on reliability, feature refinements, and build stability. Key initiatives targeted end-to-end workflow improvements: (1) backup/restore reliability in Cura to stabilize backup uploads, restoration, and plugin re-downloads with proper temporary file handling and package reinstallation, (2) 3MF writer refinements to better support Bambu Lab variants, import/export path handling, and variant naming, and (3) installer improvements to Windows packaging, reducing stray NSIS issues and ensuring Start Menu shortcuts follow configuration. In CuraEngine, build stability was enhanced through dependency pinning and robustness fixes across GCode export, including extruder switching behavior and benchmarking fixes. These efforts reduce operational risk, improve user experience, and strengthen the software supply chain for downstream automation and support.

March 2025 performance summary for Ultimaker Cura engineering. Delivered high-impact UX and reliability improvements across Cura and CuraEngine, anchored by UI/UX enhancements for Settings and Support UI, a performance-focused optimization for the settings visibility list, and robust internal build/testing upgrades. In CuraEngine, improved spiralize path accuracy and end handling, along with non-overhang support mesh generation fixes. Dependency upgrades and Windows build compatibility improvements stabilized cross-platform builds, complemented by code cleanup and test-environment updates. Installer simplification reduced installation friction. Overall, these efforts accelerated release readiness, improved user experience, and strengthened build stability across platforms.

February 2025 for Ultimaker/Cura focused on reliability, compliance, and upgrade readiness across backups, licensing, and settings. Key deliveries include plugin-aware backups and plugin lifecycle groundwork; documented third-party licensing for Qt modules with initial licensing information; aligned settings versions for Cura 5.10 compatibility; and UI stability improvements addressing default intent fallback, crash avoidance for unsupported quality types, and improved text focus behavior on scrollbar changes. Collectively these changes reduce risk in plugin ecosystems, streamline upgrades, and enhance developer and user experience.

January 2025 monthly highlights for Ultimaker core repos (Ultimaker/CuraEngine and Ultimaker/Cura). Focused on reliability and maintainability of overhang functionality, improved configuration handling, and UX clarity for multi-config printers. Delivered code-level optimizations and migration tooling to support future releases with minimal user disruption.

December 2024 monthly overview for Ultimaker/Cura focused on packaging reliability and cross‑platform consistency. Delivered a hardened Windows installer workflow for PyQt6 and Keyring, consolidating PyInstaller packaging improvements (hidden imports, PyQt6 submodules, and keyring integration) while cleaning artifacts such as conandata.yml and streamlining exclusions. Added an additional hooks folder from the cura-workflows repository to align packaging behavior across environments, and pruned binaries to reduce installer size and maintenance burden. All changes were implemented with attention to preserving macOS build compatibility and overall cross‑platform stability.

November 2024 performance summary for Ultimaker codebases (Ultimaker/Cura and CuraEngine). Delivered feature enhancements across the UI and build pipelines, completed data handling refactors for backend consistency, migrated Windows build tooling toward Conan v2, and implemented comprehensive robustness fixes to improve stability in production builds. The work reduced client/server drift, improved build reliability on Windows, and strengthened core algorithms in the CuraEngine. Business impact includes faster data submission pipelines, more reliable builds across platforms, and fewer runtime crashes in diverse materials processing scenarios.