mbta/screens
Dec 2024 – May 2026
18 Months active
Languages Used
CSSJavaScriptSCSSTypeScriptElixirSVGReacttsx
Technical Skills
CSSFront End DevelopmentReactBackend DevelopmentComponent DevelopmentFront-end Development
Robbie Sundstrom
PROFILE
Robbie Sundstrom
Over an 18-month period, contributed to mbta/screens by delivering 35 features and resolving 10 bugs, focusing on real-time transit information, alerting, and UI enhancements. Work included building and refining user-facing widgets, improving backend data filtering and serialization, and implementing robust alert aggregation and emergency messaging. Leveraged Elixir, React, and TypeScript to integrate APIs, automate workflows, and ensure cross-browser compatibility. Technical approach emphasized test-driven development, configuration management, and maintainable code through refactoring and documentation. Efforts improved data accuracy, accessibility, and deployment reliability, while streamlining developer experience and reducing maintenance overhead across both frontend and backend components of the repository.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
85Total
Bugs
10
Commits
85
Features
35
Lines of code
14,698
Activity Months18
Your Network
33 peopleWork History
May 2026
2 Commits • 1 Features
May 1, 2026May 2026 focused on stabilizing mbta/screens and improving emergency content behavior. Key work included a Phoenix framework upgrade (1.8.7) to gain performance improvements, bug fixes, and access to latest features, and the implementation of an emergency takeover content prioritization mechanism to ensure critical content takes precedence over evergreen content.
2 Commits • 1 Features
May 1, 2026May 2026 focused on stabilizing mbta/screens and improving emergency content behavior. Key work included a Phoenix framework upgrade (1.8.7) to gain performance improvements, bug fixes, and access to latest features, and the implementation of an emergency takeover content prioritization mechanism to ensure critical content takes precedence over evergreen content.
May 2026
April 2026
8 Commits • 4 Features
Apr 1, 2026April 2026: Delivered key features and fixes for mbta/screens, significantly improving rider guidance, alert responsiveness, and deployment governance. Implemented UI and data model enhancements for route display and predictions, added a new drawbridge alert type, tightened closure filtering to subway platforms, introduced granular emergency messaging location control, and added rotation-based DUP versioning for safer deployments. The work emphasizes business value through clearer real-time information, more reliable alerts, and robust deployment/versioning practices.
April 2026
8 Commits • 4 Features
Apr 1, 2026April 2026: Delivered key features and fixes for mbta/screens, significantly improving rider guidance, alert responsiveness, and deployment governance. Implemented UI and data model enhancements for route display and predictions, added a new drawbridge alert type, tightened closure filtering to subway platforms, introduced granular emergency messaging location control, and added rotation-based DUP versioning for safer deployments. The work emphasizes business value through clearer real-time information, more reliable alerts, and robust deployment/versioning practices.
March 2026
11 Commits • 5 Features
Mar 1, 2026March 2026 focused on delivering clearer, more reliable alerts for mbta/screens and strengthening developer tooling and maintenance. Key features delivered across the Screens repo include hardened alert aggregation with route-level and destination-specific labeling, more accurate alert reconstruction using parsed stop data, and UI improvements for subway status visibility. Additionally, data tooling and maintenance work improved data pipelines and reduced noise from dependencies. These efforts improved operator decision-making, reduced error-prone alerts, and lowered ongoing maintenance costs.
11 Commits • 5 Features
Mar 1, 2026March 2026 focused on delivering clearer, more reliable alerts for mbta/screens and strengthening developer tooling and maintenance. Key features delivered across the Screens repo include hardened alert aggregation with route-level and destination-specific labeling, more accurate alert reconstruction using parsed stop data, and UI improvements for subway status visibility. Additionally, data tooling and maintenance work improved data pipelines and reduced noise from dependencies. These efforts improved operator decision-making, reduced error-prone alerts, and lowered ongoing maintenance costs.
March 2026
February 2026
7 Commits • 3 Features
Feb 1, 2026February 2026 (mbta/screens): Delivered core enhancements to departures visibility and reliability, streamlined DUP client tooling, and expanded local testing capabilities. The work focused on business value: improving customer-facing status communication, stabilizing deployment workflows, and accelerating development and QA cycles.
February 2026
7 Commits • 3 Features
Feb 1, 2026February 2026 (mbta/screens): Delivered core enhancements to departures visibility and reliability, streamlined DUP client tooling, and expanded local testing capabilities. The work focused on business value: improving customer-facing status communication, stabilizing deployment workflows, and accelerating development and QA cycles.
January 2026
8 Commits • 3 Features
Jan 1, 2026January 2026: Delivered major UI and data enhancements for mbta/screens, improving subway status visibility, alert accuracy, and data robustness across deployments. Key work includes UI improvements for subway status alerts, cross-browser readiness for the DUP system, and hardened departures data handling to reduce user confusion and enable reliable rider information.
8 Commits • 3 Features
Jan 1, 2026January 2026: Delivered major UI and data enhancements for mbta/screens, improving subway status visibility, alert accuracy, and data robustness across deployments. Key work includes UI improvements for subway status alerts, cross-browser readiness for the DUP system, and hardened departures data handling to reduce user confusion and enable reliable rider information.
January 2026
December 2025
4 Commits • 2 Features
Dec 1, 2025December 2025 performance summary for mbta/screens. This month focused on reliability enhancements in alerting and improvements to UI components and header audio generation, delivering business value through reduced outages and clearer rider visuals.
December 2025
4 Commits • 2 Features
Dec 1, 2025December 2025 performance summary for mbta/screens. This month focused on reliability enhancements in alerting and improvements to UI components and header audio generation, delivering business value through reduced outages and clearer rider visuals.
November 2025
2 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for mbta/screens. Key deliveries include: (1) departure data retrieval optimization for ferry and commuter rail routes by replacing a blanket include_schedules with route_type-based filtering and introducing encode_params to improve parameter handling (commit a3f639780871e524b1928eb6a5cc55845c15b718). (2) alerts crash prevention on empty route/stop data with nil handling by guarding Enum.min with a default value and adding tests for nil scenarios in reconstructed_alerts (commit ab1ffb1519b2c1d77050784ff5bb5ec9650689d8). These changes enhance data relevance, reliability, and maintainability, while reducing unnecessary data processing and guarding against edge-case failures.
2 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for mbta/screens. Key deliveries include: (1) departure data retrieval optimization for ferry and commuter rail routes by replacing a blanket include_schedules with route_type-based filtering and introducing encode_params to improve parameter handling (commit a3f639780871e524b1928eb6a5cc55845c15b718). (2) alerts crash prevention on empty route/stop data with nil handling by guarding Enum.min with a default value and adding tests for nil scenarios in reconstructed_alerts (commit ab1ffb1519b2c1d77050784ff5bb5ec9650689d8). These changes enhance data relevance, reliability, and maintainability, while reducing unnecessary data processing and guarding against edge-case failures.
November 2025
October 2025
6 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for mbta/screens: Focused on delivering user-facing enhancements for the Subway Status Widget, improving data accuracy, and simplifying maintenance. Key work included enhanced partial-closure reporting, platform-specific details, new line support, and terminology refinements; fixes to display logic and data references; and asset naming standardization to reduce future maintenance overhead. This work enhances reliability of real-time subway status, reduces user confusion, and improves onboarding for new contributors.
October 2025
6 Commits • 2 Features
Oct 1, 2025October 2025 monthly summary for mbta/screens: Focused on delivering user-facing enhancements for the Subway Status Widget, improving data accuracy, and simplifying maintenance. Key work included enhanced partial-closure reporting, platform-specific details, new line support, and terminology refinements; fixes to display logic and data references; and asset naming standardization to reduce future maintenance overhead. This work enhances reliability of real-time subway status, reduces user confusion, and improves onboarding for new contributors.
September 2025
1 Commits • 1 Features
Sep 1, 2025Monthly summary for 2025-09 (mbta/screens). Delivered an enhancement to Asana integration by attaching PRs to their corresponding Asana tickets on PR opened/edited events, and removed automatic movement of Asana tasks between development, review, and deployment states. This change tightens traceability between code changes and project management tasks, reduces manual ticket handling, and speeds up triage, review, and deployment coordination. Commit f23b19ac7cfbec9b56259d385395fadc379f9b46 documents the workflow update.
1 Commits • 1 Features
Sep 1, 2025Monthly summary for 2025-09 (mbta/screens). Delivered an enhancement to Asana integration by attaching PRs to their corresponding Asana tickets on PR opened/edited events, and removed automatic movement of Asana tasks between development, review, and deployment states. This change tightens traceability between code changes and project management tasks, reduces manual ticket handling, and speeds up triage, review, and deployment coordination. Commit f23b19ac7cfbec9b56259d385395fadc379f9b46 documents the workflow update.
September 2025
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 — mbta/screens: Delivered CapeFlyer Route Visual Identity (dedicated rail icon in the route pill UI) and CapeFlyer ocean blue color across route pills, enabling quick visual identification and consistent branding. This work improves UX by reducing cognitive load for riders and establishes a scalable theming baseline for future UI components.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 — mbta/screens: Delivered CapeFlyer Route Visual Identity (dedicated rail icon in the route pill UI) and CapeFlyer ocean blue color across route pills, enabling quick visual identification and consistent branding. This work improves UX by reducing cognitive load for riders and establishes a scalable theming baseline for future UI components.
July 2025
2 Commits
Jul 1, 2025July 2025 for mbta/screens focused on stability and data correctness. No new user-facing features were shipped; two critical bug fixes were delivered that improve alert visibility and schedule accuracy. These changes enhance user trust, reduce confusion during service disruptions, and align UI with the underlying v3 API data.
2 Commits
Jul 1, 2025July 2025 for mbta/screens focused on stability and data correctness. No new user-facing features were shipped; two critical bug fixes were delivered that improve alert visibility and schedule accuracy. These changes enhance user trust, reduce confusion during service disruptions, and align UI with the underlying v3 API data.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for mbta/screens: Delivered user-centric UI improvements and addressed data accuracy edge cases to strengthen service disruption visibility and overnight schedule reliability.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 performance summary for mbta/screens: Delivered user-centric UI improvements and addressed data accuracy edge cases to strengthen service disruption visibility and overnight schedule reliability.
May 2025
6 Commits • 3 Features
May 1, 2025Month: 2025-05 — mbta/screens delivered targeted usability and reliability improvements, focusing on accessibility, data clarity, and codebase cleanliness. Key features were augmented with header-only behavior, subtitle-aware headers, and enhanced audio readout; robustness was increased for alert fetching; and deprecated screens were removed to streamline maintenance. Technologies and skills demonstrated include frontend component design, data formatting utilities, accessibility-conscious readouts, defensive coding, and thorough cleanup of deprecated assets.
6 Commits • 3 Features
May 1, 2025Month: 2025-05 — mbta/screens delivered targeted usability and reliability improvements, focusing on accessibility, data clarity, and codebase cleanliness. Key features were augmented with header-only behavior, subtitle-aware headers, and enhanced audio readout; robustness was increased for alert fetching; and deprecated screens were removed to streamline maintenance. Technologies and skills demonstrated include frontend component design, data formatting utilities, accessibility-conscious readouts, defensive coding, and thorough cleanup of deprecated assets.
May 2025
April 2025
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for mbta/screens: Delivered user-focused Hanover departure UI improvements, introduced No Data/No Connections messaging on the on-bus display, and improved developer experience by trimming Prettier logs. These changes enhance usability, reliability during data outages, and maintainability while delivering measurable business value in real-time transit information.
April 2025
6 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for mbta/screens: Delivered user-focused Hanover departure UI improvements, introduced No Data/No Connections messaging on the on-bus display, and improved developer experience by trimming Prettier logs. These changes enhance usability, reliability during data outages, and maintainability while delivering measurable business value in real-time transit information.
March 2025
2 Commits • 2 Features
Mar 1, 2025Month: 2025-03 | Focused on delivering user-facing UI widgets with clean backend integration and improved filtering to reduce noise in closures data. Two high-impact features shipped in mbta/screens, with a refactor of elevator alerts processing to improve relevance of reported closures.
2 Commits • 2 Features
Mar 1, 2025Month: 2025-03 | Focused on delivering user-facing UI widgets with clean backend integration and improved filtering to reduce noise in closures data. Two high-impact features shipped in mbta/screens, with a refactor of elevator alerts processing to improve relevance of reported closures.
March 2025
February 2025
5 Commits • 1 Features
Feb 1, 2025February 2025 — mbta/screens: Delivered the On-Bus Screen Experience (initial release) with styling, routing, and backend configuration; added placeholder admin UI content and URL-parameter-driven testing for route, stop, trip IDs, and vehicle_id to accelerate QA and enable deterministic demos. Fixed ScreenData API by initializing default query_params to prevent runtime errors in the self_refresh_runner. Improved UI resilience with fallback logic for long route names in pills. These efforts reduce deployment risk, improve onboard user experience, and streamline data-loading workflows.
February 2025
5 Commits • 1 Features
Feb 1, 2025February 2025 — mbta/screens: Delivered the On-Bus Screen Experience (initial release) with styling, routing, and backend configuration; added placeholder admin UI content and URL-parameter-driven testing for route, stop, trip IDs, and vehicle_id to accelerate QA and enable deterministic demos. Fixed ScreenData API by initializing default query_params to prevent runtime errors in the self_refresh_runner. Improved UI resilience with fallback logic for long route names in pills. These efforts reduce deployment risk, improve onboard user experience, and streamline data-loading workflows.
January 2025
6 Commits • 1 Features
Jan 1, 2025January 2025: mbta/screens delivered Elevator UI/UX enhancements across elevator screens, focusing on clarity, reliability, and alignment with MBTA endpoints. Key changes include header layout improvements, conditional arrow visibility and sizing, updated links, new assets, and robust fallbacks to improve user experience during data outages. The work reduces ambiguity in navigation and improves accessibility and consistency across devices, delivering measurable business value through improved user satisfaction and reduced support queries related to elevator screens.
6 Commits • 1 Features
Jan 1, 2025January 2025: mbta/screens delivered Elevator UI/UX enhancements across elevator screens, focusing on clarity, reliability, and alignment with MBTA endpoints. Key changes include header layout improvements, conditional arrow visibility and sizing, updated links, new assets, and robust fallbacks to improve user experience during data outages. The work reduces ambiguity in navigation and improves accessibility and consistency across devices, delivering measurable business value through improved user satisfaction and reduced support queries related to elevator screens.
January 2025
December 2024
5 Commits • 1 Features
Dec 1, 2024December 2024: Delivered cohesive UI polish and reliability improvements for the Elevator Closures List in mbta/screens. Consolidated visual refinements and bug fixes to deliver a consistent user experience: adjusted divider padding, ensured top-line rendering across all pages, fixed paging indicator spacing, and applied pluralization logic for multiple elevators. Introduced a first-row-on-page concept via a new CSS class/prop to standardize rendering across pages, and performed code cleanup. Quality improvements included Prettier formatting and lint fixes to raise code quality and accelerate reviews. Business impact: reduces visual defects, improves operator UX for monitoring elevator closures, and enables faster QA cycles and easier future maintenance. Technologies/skills demonstrated: frontend UI styling, CSS/class-based rendering, code quality tooling (Prettier/lint), and commit-driven incremental delivery.
December 2024
5 Commits • 1 Features
Dec 1, 2024December 2024: Delivered cohesive UI polish and reliability improvements for the Elevator Closures List in mbta/screens. Consolidated visual refinements and bug fixes to deliver a consistent user experience: adjusted divider padding, ensured top-line rendering across all pages, fixed paging indicator spacing, and applied pluralization logic for multiple elevators. Introduced a first-row-on-page concept via a new CSS class/prop to standardize rendering across pages, and performed code cleanup. Quality improvements included Prettier formatting and lint fixes to raise code quality and accelerate reviews. Business impact: reduces visual defects, improves operator UX for monitoring elevator closures, and enables faster QA cycles and easier future maintenance. Technologies/skills demonstrated: frontend UI styling, CSS/class-based rendering, code quality tooling (Prettier/lint), and commit-driven incremental delivery.
Activity
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Quality Metrics
Correctness93.0%
Maintainability88.4%
Architecture86.4%
Performance87.0%
AI Usage21.6%
Skills & Technologies
Programming Languages
CSSElixirHTMLJavaScriptMarkdownReactSCSSSVGShellTypeScript
Technical Skills
API DevelopmentAPI IntegrationAPI developmentAPI integrationBack-end DevelopmentBackend DevelopmentBug FixBug FixingCI/CDCSSCSV generationComponent DevelopmentConfiguration ManagementData FilteringData Parsing
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