June 2026: Key focus on building robust CI/CD and performance testing for CuraEngine. Delivered a comprehensive Build, Test, and Benchmarking Workflows and Configuration, enabling standardized builds, tests, and benchmarking across the repository. Implemented configuration files and workflows that streamline the build pipeline, increase test coverage, and provide repeatable benchmarking results. As part of the integration, updated src/ExtruderPlan.cpp (commit 3c21f3ed10eb1bf23fc250d4f4266beeec208109), co-authored by Remco Burema, aligning core components with the new workflows. Major bugs fixed: None reported in data. Overall impact: Accelerated development cycles, improved reliability, and clearer performance signals; established a scalable foundation for future CI improvements. Technologies demonstrated: C++ codebase updates, CI/CD/configuration management, reproducible benchmarking, collaboration/co-authorship.

Month: 2026-05 — Delivered key features and stability fixes across Cura and CuraEngine, driving reliability, performance, and developer velocity. Highlights include a robust barebone 3MF loading workflow, a foundation for CI/CD and GCode analysis in CuraEngine, and proactive maintenance to ensure current, privacy-friendly URLs across the UI. Major fixes improve user experience for large-layer prints, engine variable handling, and webserver restart reliability, contributing to reduced support tickets and faster iteration cycles.

April 2026 Highlights: Strengthened GCode generation stability and overhang handling in CuraEngine, including per-part overhang masks, LayerPlan integration, and robust GCode writer behavior. Hardened writeCode logic to avoid duplicate newlines and leveraged C++20 features for cleaner code paths. Improved safety around layer handling for lightning infill and introduced tests to guard against regressions. Expanded CI/CD automation and Jira-ticket integration across CuraEngine, including GCodeAnalyzer linkage, resource-channel updates, and packaging workflow refinements. Delivered user-facing improvements in Cura with UI polish and standardized feedback templates, while streamlining CI workflows to pass only essential information. Demonstrated strong testing discipline and cross-repo collaboration, accelerating release readiness and reliability.

Month: 2026-03 highlights across Ultimaker/Cura and Ultimaker/CuraEngine focused on reliability, user feedback, and control over print quality, delivering business value through more predictable builds, streamlined collaboration with support, and stronger tooling for robust slicing. Key achievements: - Deferred 3MF scene node loading until machine activation in Cura to ensure correct build volume and settings, and synchronized materials; combined activation/material delivery enabled via updates to _loadAndAddNodesToScene and _finalizeThreeMFActivation. Commits: b564d2005e8655576468087aed4daed1ecfdb0b8; 2bce98f9a2259e381b2e543280282c0416b36e7a. Impact: prevents misconfigurations with UCP files, improves material handling, and reduces post-load rework. - Introduced issue templates for bug reports, feature requests, and slicing errors in Cura to streamline user feedback and triage; commits: 127eb9efdae00169bb55e77ee805796a001dcbca; 293842d0a4dbfc06232a9a88662f9036901b8a0b; ea44d1932eb8b9d14f2a87d09fbb6f8f6672cd7c. Impact: faster issue routing, improved support efficiency, and better customer experience. - Painting safety enhancements to prevent modifier/special meshes from being painted, preserving mesh integrity during UV-unwrapping and texture prep; commit: 33a200c4ec81f45ef10cd235b4834d6c920ee55b. Impact: higher reliability of slices and reduced data corruption. - Roofing temperature customization added across Cura slicing to allow specifying roofing temperatures for better print quality; commits: e7fd208dc5252de9a8ae3543c3c35ec0e3c26fe3; 4a78c853bb1115947f03fc8c27f48ea135e6bf9c. Impact: finer control over roofing behavior and consistency of results. - Toolpath robustness improvements in CuraEngine, including annuli handling and bridging fixes to ensure valid, efficient toolpaths for challenging geometries; commits: 280923f7a782a32fd99dd33977dd7e6e10e5b04a; a9f378be7ef36adf65cec1e0896b985296d35dc8. Impact: fewer slicing failures and more reliable prints in complex geometries. Overall impact and accomplishments: Increased reliability of machine activation and materials workflow, improved user feedback mechanisms, and stronger, more predictable print quality controls. Demonstrated cross-repo collaboration between Cura and CuraEngine with an emphasis on user-centric improvements and maintainable code changes. Technologies/skills demonstrated: deferred loading and state management, activation/material pipelines, UI/state synchronization for UCP, QML/UI refinements, robust fallbacks in toolpath generation, and structured issue templates for streamlined customer support.

February 2026 monthly summary for Ultimaker/Cura: Focused on preserving cross-machine compatibility by aligning skin_preshrink calculations for S6/S8 with S5 definitions. The change ensures existing S5-based profiles remain unchanged, minimizing drift and support risk, and contributes to a stable, predictable release.

January 2026 monthly summary for Ultimaker Cura: Delivered key features that enhance string setting UX and reliability, fixed critical issues, and advanced cross‑platform support, delivering measurable business value and technical excellence. Highlights include a modular multiline SettingTextArea UI for string settings with NoWrap behavior to preserve G-code safety, plus a directed migration into a reusable plugin component. Print job queue got asynchronous reliability improvements with new callbacks and a dedicated _trackReply to improve reply tracking and error logging. A user‑facing Open Cura Log File action was added with robust path handling to ensure log access on Windows and Linux. Quality and UX were enhanced through lint refinements, a UI typo fix, and clearer Z Seam descriptions, along with restoration of skin_preshrink settings on s6/s8. The release also aligns resources with a version bump to 2.3.0, updates to elegoo_centauri_carbon.def.json, and a default_value: true for the Enable Advanced Cooling option.

December 2025 — Ultimaker Cura: Delivered key features, major stability/quality improvements, and maintainability work focused on performance, consistency, and troubleshooting support. Highlights include Simulation View enhancements with layer height display and a robust caching strategy, unified standby/temperature resolution across printers, and targeted print quality and UX improvements. Also shipped a dynamic brim_gap override for Ultimaker 2+ Connect S-line and completed code quality improvements and documentation updates to aid deployment and debugging. Plugin version bumped to 1.1.0.

November 2025 (Ultimaker/Cura) — Focused on user experience improvements in SimulationView, UI consistency, and automation reliability. Delivered features to reduce extruder warning noise, standardized UI component naming, fixed CI workflow formatting, and introduced structured issue reporting templates, driving faster feedback and release readiness.

October 2025 performance summary: Delivered core improvements across Cura and CuraEngine that enhance print reliability, security, and efficiency, with a focus on production-quality features and maintainability. Notable outcomes include precision Z-hop and G-code formatting refinements, security hardening for 3MF workflows, exposure of advanced settings, improved print parameter estimation, and robust extruder handling. Also resolved a merge conflict in CuraEngine and emphasized code hygiene to support long-term maintenance and faster future iterations.

In September 2025, delivered safety-focused enhancements to Cura focusing on reliability, usability, and maintainability. Key outcomes include a safer Z-hop behavior for the travel script and UI/config/asset consistency improvements across the Ultimaker Cura repo, with measurable improvements in safety, predictability, and user experience.

August 2025: Focused on delivering cross-printer configuration enhancements, UX improvements, and code quality improvements to boost reliability and user productivity in Cura. Key features include printer configuration and hardware profile improvements for broader printer compatibility (bridge/overhang tuning, chamber cooling, PLA sprint config, travel avoid distances, and updated def.jsons), sign-in UI stabilization with redirect fix, Paint Tool Undo/Redo UX improvements, foundational UI theming, and internal code quality refinements. The work reduces setup time, minimizes print failures, and accelerates editing workflows, while laying groundwork for scalable UI/UX and maintainability.

July 2025 monthly summary for Ultimaker/Cura: Key delivery focused on configuration hygiene and CI/CD traceability. Major bugs fixed: none reported. Highlights include cleanup of obsolete S8 quality profiles and enhancement of build traceability in CI/CD, enabling faster troubleshooting and more predictable deployments.

June 2025 monthly summary for Ultimaker/Cura and CuraEngine. Focused on delivering hardware support, expanding protocol capabilities, and hardening CI/CD and packaging for release readiness. Key outcomes include (1) v2 buildplate texture support for Hidra/Hidra Plus; (2) extensive CI enhancements for slicing error checks and automated packaging workflows; (3) a broad set of code quality and security improvements that improve maintainability and reduce risk; (4) configuration and packaging schema updates and a version bump to 25; (5) CuraEngine protocol extension to support new print feature types. These efforts reduce risk, speed up releases, improve reliability on hardware, and provide a more scalable, auditable workflow.

May 2025 (Ultimaker/Cura) delivered targeted improvements to reduce MVP scope, stabilize configuration handling, and polish UI assets, while addressing a critical end-to-end G-code unit test issue. The work emphasizes business value through a leaner product offering, improved maintainability, and more reliable configuration inheritance, with measurable quality gains in tests and visuals.

April 2025: Focused on reliability and automation of the CuraEngine packaging pipeline. Delivered a stability improvement to the CI/CD workflow by correcting GitHub Actions conditions to trigger packaging on push and PR events for main and version branches, and fixed PR target detection by using base_ref instead of head_ref to accurately identify PRs aimed at the main branch. Implemented across two commits, enabling more predictable builds and faster release readiness.

March 2025 performance summary for Ultimaker/Cura focusing on deliverables in G-code handling, UI/UX refinements, and documentation, with a strong emphasis on reliability and maintainability. The team implemented code-quality improvements and modernizations to support faster feature cycles and clearer release notes, while addressing a long-standing Z-seam update issue and polishing the user experience.

February 2025 — Ultimaker Cura: Delivered key feature improvements, stability enhancements, and configuration/CI discipline that directly add business value through more reliable prints, clearer UI, and streamlined builds. Focused on post-processing improvements, UI/UX alignment, and robust configuration management, while maintaining compatibility across printer definitions and CI workflows.

January 2025 codebase maintenance and stabilization for Ultimaker Cura. Focused on consolidating internal maintenance work to reduce technical debt and improve reliability. Key actions included refactoring PurgeLinesAndUnload for clarity and efficiency, cleanup of workflow management artifacts, implementing a targeted code tweak from a recent review, and upgrading the dulcificum dependency from a testing to a stable branch in conandata. These changes reduce maintenance burden, minimize noise in CI, and improve predictable builds, enabling the team to accelerate future feature work.

December 2024: Delivered a robust purge lines/unload overhaul with multi-extruder support, alongside UI clarity improvements for machine settings and foundational release tooling. These changes enhance print reliability, reduce setup complexity, and streamline release readiness across the Cura codebase.

November 2024 monthly summary for Ultimaker/Cura. Focused on expanding material support and improving UI localization, delivering business value through broader material capability and a more intuitive user experience. Key work includes integrating a new material definition (eazao_clay) and refining translation and labeling for nozzle size and machine definition variants.