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Matthias Wirtz

PROFILE

Matthias Wirtz

Matthias Wirtz contributed to teslamate-org/teslamate by delivering robust dashboard features, performance optimizations, and infrastructure upgrades over 18 months. He enhanced data accuracy and visualization by refining SQL queries, optimizing Elixir backend logic, and implementing dashboard UI improvements with JavaScript and CSS. His work included upgrading Grafana and PostgreSQL integrations, introducing static asset compression, and improving CI/CD reliability. Matthias addressed complex data migration and compatibility issues, ensuring stable deployments and maintainable code. Through careful dependency management, documentation updates, and security patches, he improved system reliability and user experience, demonstrating depth in backend development, DevOps, and full stack engineering.

Overall Statistics

Feature vs Bugs

57%Features

Repository Contributions

115Total
Bugs
37
Commits
115
Features
50
Lines of code
128,974
Activity Months18

Your Network

487 people

Shared Repositories

487

Work History

April 2026

9 Commits • 4 Features

Apr 1, 2026

April 2026 performance review for teslamate-org/teslamate: Delivered focused enhancements and reliability improvements with an emphasis on user experience, data performance, and maintainability. Key deliverables include UX upgrade of the map UI with dark mode support, a fix to map tile rendering in webview, a database performance optimization for BRIN indexes, and comprehensive dependency updates across the project, complemented by up-to-date changelog documentation.

March 2026

23 Commits • 11 Features

Mar 1, 2026

Summary for 2026-03: Key features delivered: - Webview: Sort vehicles by display_priority to improve navigation and visibility for drivers and fleet operators (commit 4ea734ddb6b49d883efec9dd974fb2805c06d4a3). - Release notes and changelog/docs enhancements: Added information about known issues and fixes, and updated changelog/docs to improve issue visibility and onboarding in 3.0.0 era (commits 4a6b1c9a8823cf628e638d3c125011ae4c8de56b, 57e2621298b023921553242bfe7aeaef0c65dbc0, 94ae0121709436c63b8e637305d972eed6ab9d01, bdf2bdd0499194db843a8517922869dfc3cdfd7b, a6d541b51eee21cf5eabd8483f8c13aea5432157). - CI/CD improvements and reliability: Implemented controls to limit duplicate PR runs, updated actions for Node 20 compatibility, and enhanced PR/image handling with main-branch build cache fallbacks and related improvements (commits ea341d4b66fd0822f13392a3364dc6c2afc08996, 7408ea0e7304332aa2d413fb2c10ec4269075e9d, 10bed7089b2fe6ba2a7d8b13b283c2502df5966e, e24dde186e8819a502a47ee95b56e13aedb9a45a, 5aa44af9d3954a9203d2487bbc67d6730f988296). - Dependency upgrades and code quality: Bump ex_cldr to 2.47.1 and apply code style lint improvements (commits 43d69085641eaa267b45f247de4bec68e1e0e00e, e34528d0a044c1ac89daaf3151d157205f37a2cb). Major bugs fixed: - Grafana: Use FLOOR/CEIL instead of ROUND for timestamps in dashboard links to prevent narrowed timeranges (commit 5f530c54bb062a72b7534090d8316bdcaa5f510e). - Dashboards: Ensure Charges/Drives dashboards load correctly if no Geofence exists (commit 002d7883c017d0128b2c5de83afcdca57194f952). - CI: Ensure not running two workflows when pushing to a branch that has a PR open; fix concurrency group in DevOps workflow; purge PR-related GHCR tags on PR close; security checks adjustments for push events (commits 29b86f90b83def2043b7b439d5915a78d8238eec, 0532045830fccba945794344907d6ba172e52eb2, fc80f7a62420b0d3dd9f2bfe18e0488430cbaaa2, 5aa44af9d3954a9203d2487bbc67d6730f988296). - Dashboard/data integrity: Fix handling of incomplete data in Charging Stats / Statistics / Trips dashboards (commit 00ab26adb998d919c552c2968341b22bf36c4819). Overall impact and accomplishments: - Significantly improved user experience and reliability through UI enhancements and more transparent release documentation. - Reduced operational risk and noise in CI/CD pipelines by eliminating duplicate runs, aligning Node 20 compatibility, and optimizing build workflows. - Strengthened data integrity and dashboard reliability, enabling more accurate fleet insights and better decision support. - Accelerated onboarding for new releases via improved changelog and known-issues documentation. Technologies/skills demonstrated: - Elixir ecosystem maintenance (dependency management with ex_cldr), code quality and lint practices, and robust CI/CD orchestration with GitHub Actions. - Web UI/UX improvements in the webview layer leading to clearer vehicle prioritization. - Grafana dashboard reliability and data handling practices. - Documentation governance and changelog management for release readiness.

February 2026

8 Commits • 5 Features

Feb 1, 2026

February 2026: The Teslamate platform received focused performance, stability, and UX improvements. Key features delivered include static asset compression (Brotli and Zstandard) to reduce bandwidth and speed up static asset delivery; platform core upgrades (Elixir runtime to 1.19.5, OTP 26) with associated dependency bumps to improve performance and stability; Grafana dashboard data fetch enhancement via an updated CORS proxy for GitHub data; a dark theme UI upgrade using Bulma 1 with new theme variables; and Grafana core upgrade to 12.4.0 for performance gains and new features. While no explicit bug fixes are listed in the provided data, the upgrades and build/dependency alignment reduce regressions and improve maintainability. Overall, these changes improve user experience, dashboard responsiveness, and platform reliability, enabling faster feature delivery and easier future upgrades. Technologies demonstrated: Elixir, Nix, Grafana, Bulma, Brotli/Zstandard compression, CORS proxy, dependency management, CI/build pipelines.

January 2026

3 Commits • 1 Features

Jan 1, 2026

January 2026 delivered focused performance improvements and documentation cleanups across two major repositories, boosting energy-visibility metrics, ensuring Atom feed spec compliance, and enhancing test coverage. The changes prioritize business value by improving user experience, data accuracy, and maintainability.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 was focused on improving observability, security, and reliability for the teslamate project. Delivered two key changes and updated documentation to reflect the new behavior and logging improvements.

November 2025

3 Commits • 2 Features

Nov 1, 2025

November 2025: Delivered critical data correctness fixes and foundational infra upgrades for TeslaMate, driving reliability, performance, and compatibility improvements across the stack.

October 2025

6 Commits • 3 Features

Oct 1, 2025

October 2025 monthly summary for teslamate: Delivered platform-hardening and performance improvements across the core stack with a focus on stability, visibility, and accuracy. Key features were implemented alongside essential bug fixes, driving measurable business value through better build reliability, enhanced diagnostics, and faster dashboards.

August 2025

4 Commits

Aug 1, 2025

February 2024 monthly summary? Wait, the user data is August 2025. The system asked: Month: 2025-08. The summary should reflect August 2025. The initial summary I prepare will use that period. The summary is concise and focuses on business value and technical achievements across teslamate-org/teslamate and ente-io/ente. It highlights key features delivered (data migration integrity, Grafana upgrade), major bugs fixed (elevation data overflow, PostgreSQL image pinning), and overall impact (stability, compatibility, observability). It includes technologies/skills demonstrated (Docker, Grafana, PostgreSQL, Docker image pinning, changelog/docs).

July 2025

3 Commits • 3 Features

Jul 1, 2025

July 2025 performance summary for teslamate-org/teslamate focused on delivering robust analytics enhancements, reliability improvements, and platform upgrades that directly support business value and data-driven decision making. Key outcomes include extending database checks to support beta/RC PostgreSQL versions, enriching drive analytics with total ascent/descent metrics, and upgrading Grafana to leverage new features and fixes. These efforts improve data integrity, dashboard capabilities, and scalability of the fleet analysis workflows.

June 2025

4 Commits • 1 Features

Jun 1, 2025

June 2025 performance summary for teslamate-org/teslamate: Focused on data accuracy, dashboard reliability, and security, delivering targeted fixes and enhancements that drive business value for fleet operators and reduce maintenance risk.

May 2025

6 Commits • 2 Features

May 1, 2025

May 2025 monthly summary for teslamate-org/teslamate: Delivered an across-the-project Grafana upgrade to 12.x with security and performance enhancements, refreshed the home dashboard UI, fixed robustness and data accuracy issues, and improved maintainability through updated docs and changelogs. Resulting in stronger admin control, more reliable analytics, and a better user experience.

April 2025

9 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for teslamate.org/teslamate: Delivered features and reliability improvements across dashboards and data metrics, enhancing data granularity, accuracy, and deployment stability. Key business value includes more precise energy usage insights, improved user experience, and streamlined packaging for production deployments.

March 2025

2 Commits • 2 Features

Mar 1, 2025

March 2025 (2025-03) monthly summary for teslamate-org/teslamate: Delivered two improvements that enhance user-facing dashboards and deployment reliability. Documentation and Dashboard Screenshot Links Update improves discoverability and ensures dashboards reflect latest visuals; Grafana upgrade to 11.6.0 with deployment simplifications reduces operational complexity and improves compatibility. No major bugs fixed this month. Impact: clearer contributor docs, improved dashboard consistency for users, and simpler single-instance deployments. Technologies/skills: Git-based documentation maintenance, Grafana administration, deployment configuration, and changelog communication.

February 2025

3 Commits • 2 Features

Feb 1, 2025

February 2025 monthly delivery for teslamate-org/teslamate: Completed a project-wide Grafana upgrade to 11.5.x (11.5.0/11.5.2), updating Dockerfile, Nix configuration, and documentation to reflect the version bump, enabling newer Grafana features and bug fixes. Also delivered a Dashboard Elevation Scale Enhancement to improve readability of elevation data in drive statistics. These changes stabilized observability tooling, reduced upgrade risk, and laid groundwork for future Grafana improvements. The work improved data visibility for operators and dashboards that render more accurately at higher elevation ranges, with a maintainable upgrade path across CI/CD. Technologies demonstrated include Grafana, Docker, Nix, dashboard design, and documentation.

January 2025

4 Commits • 2 Features

Jan 1, 2025

Concise monthly summary for 2025-01 focusing on data accuracy, visualization reliability, and deployment stability. Delivered concrete dashboard improvements, compatibility fixes for Grafana 11.4.0 across environments, and documentation enhancements to reduce onboarding friction.

December 2024

4 Commits • 2 Features

Dec 1, 2024

Month: 2024-12. Focused on stabilizing observability, onboarding, and robustness in teslamate-org/teslamate. Key work spanned Grafana upgrade, documentation alignment for language/runtime requirements, and resilience improvements to the battery health dashboard. Deliveries reduced onboarding friction and improved runtime stability.

November 2024

14 Commits • 6 Features

Nov 1, 2024

November 2024: Delivered a cohesive set of features and reliability improvements for teslamate. The onboarding experience was enhanced with a Welcome Dashboard, a default home dashboard path, and a changelog entry, improving first-run adoption and user satisfaction. Upgraded Grafana to 11.2.3 across the stack, aligning CHANGELOG, Dockerfile, and docs to leverage new features and security patches. Updated dashboard provisioning and Nix Grafana configuration to enable UI updates and ensure consistent UI behavior. Refactored data layer with standardized timestamptz usage and date_trunc, and centralized distance unit conversion to improve query performance and data accuracy. Standardized map services to OpenStreetMap for consistent geospatial data. Fixed the efficiency calculation formula for more accurate vehicle efficiency metrics. Rolled out dashboard quality and UI polish improvements, including drive stats performance improvements, axis label fixes, query count reductions, and overall UI refinements, resulting in faster, more reliable dashboards with better data presentation. Overall impact: improved onboarding, more accurate metrics, faster dashboards, and reduced maintenance through standardization and centralized configurations. Technologies/skills demonstrated: Grafana upgrades, Nix/Grafana configuration, SQL date/time handling, OpenStreetMap integration, UI/UX optimization, performance tuning, and thorough version-control discipline across commits.

October 2024

8 Commits • 2 Features

Oct 1, 2024

October 2024 for teslamate-org/teslamate focused on performance, data accuracy, and UI/backend consistency. Key features delivered: (1) Battery Range Data Processing and Drive Data Retrieval Performance—consolidated filtering and query optimizations with ideal_battery_range_km and correct minimum IDs; (2) Date Handling Standardization to Datetimelocal—unified date format for UI and backend management. Major fixes: (1) Regression: Reintegrate Missed PR 4124 to restore intended functionality; (2) Documentation Image Path Corrections for development docs (Docker and Grafana references); (3) KWh Unit Handling Bug in Timeline Dashboard—removed unnecessary convert_km to fix unit calculations; (4) Dutch-Tax Dashboard Deduplication—ensured unique tax data per car. Overall impact and accomplishments: faster, more reliable data queries; improved dashboard accuracy and data integrity; clearer developer documentation, enabling better decision-making. Technologies/skills demonstrated: Elixir/Phoenix performance optimizations, SQL query conditioning, date handling refactor to datetimelocal, regression and release hygiene, Docker/Grafana documentation alignment.

Activity

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Quality Metrics

Correctness91.4%
Maintainability88.8%
Architecture85.4%
Performance84.6%
AI Usage21.0%

Skills & Technologies

Programming Languages

CSSDockerfileElixirHTMLJSONJavaScriptMarkdownNixSQLShell

Technical Skills

API DevelopmentAPI IntegrationAPI integrationBackend DevelopmentBackend developmentBug FixBug FixingBuild SystemsBulmaCI/CDCSSChangelog ManagementCode RefactoringConfigurationConfiguration Management

Repositories Contributed To

3 repos

Overview of all repositories you've contributed to across your timeline

teslamate-org/teslamate

Oct 2024 Apr 2026
18 Months active

Languages Used

ElixirSQLYAMLCSSDockerfileHTMLJavaScriptMarkdown

Technical Skills

API DevelopmentAPI IntegrationBackend DevelopmentBug FixingCode RefactoringConfiguration

ente-io/ente

Aug 2025 Aug 2025
1 Month active

Languages Used

YAML

Technical Skills

Database ManagementDevOps

grafana/grafana

Jan 2026 Jan 2026
1 Month active

Languages Used

JavaScriptTypeScriptXML

Technical Skills

JavaScriptTypeScriptfront end developmenttesting