Grant Humphries
Software Developer at TriMet
Portland, Oregon, United States
Summary
👤
Senior🎓
Top SchoolGrant Humphries is a software developer in Portland with 14 years of experience blending back-end engineering and applied cartography at TriMet. He designs and maintains internal web apps and spatial data pipelines, including ETL processes that convert OpenStreetMap into formats for production systems and a compacted 1 TB aerial imagery stack served via WMS. An active open-source contributor, he has improved bicycle routing and narrative road naming in the well-known OpenTripPlanner project, reflecting his dual focus on routing logic and map clarity. Grant thrives on continuous learning and team collaboration, and he brings uncommon depth in both GIS tooling (PostGIS, GeoServer, GDAL) and transport-focused software development.
14 years of coding experience
Bachelor of Science, Business-Mathematics, Bachelor of Science, Business-Mathematics at Southern Oregon UniversityGIS Graduate Certificate, GIS, GIS Graduate Certificate, GIS at Portland State University
Stackoverflow
2,906reputation
1.3mreached
19answers
1question
mysql
top-5%
python
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orm
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database
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sqlalchemy
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Github Skills (21)
openstreetmap10
routing-slip10
java10
javas10
routes10
mysql9
python9
forloop9
sqlalchemy9
orm9
database9
gitconfig6
cygwin6
shapely6
anaconda6
Programming languages (6)
Github contributions (5)
opentripplanner/OpenTripPlanner
Oct 2011 - Dec 2012
An open source multi-modal trip planner
Role in this project:
Back-end Developer
Back-end DeveloperContributions:30 commits, 3 comments, 1 issue in 1 year 2 months
Contributions summary:Grant primarily contributed to the `opentripplanner-graph-builder` component, modifying code to improve the accuracy of route descriptions by adjusting how different road types are named in the narrative. The user focused on adjusting weights and permissions for various road types, especially those related to bike infrastructure, and added new features for bicycle tagging. The user implemented changes related to how different tags are applied and displayed.
multi-sourcemulti-modaltrip-plannermodalplanner
grant-humphries/sw-trails-web-map
Mar 2014 - Mar 2016
Contributions:14 commits, 10 pushes in 2 years
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