Per Liedman
Software Developer at Solvi AB
Gothenburg, Västra Götaland County, Sweden
Summary
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RockstarPer Liedman is a software developer based in Gothenburg with 15 years of experience specialising in geographic systems, GIS and map-centric visualization. He blends front- and back-end skills to create pragmatic, elegant interfaces and has contributed to high-profile open-source mapping projects like Leaflet and Proj4Leaflet, improving projections, realtime data handling and routing UX. His work on popular Leaflet extensions demonstrates a knack for refactoring core logic for efficiency (enter/update/exit semantics) and polishing user interactions, including accessibility and touch support. At companies from Kartena to Solvi he has moved between systems architecture and hands-on development, favouring simple, beautiful solutions over enterprise stacks—he explicitly avoids .NET and Java roles. An understated strength is his ability to translate complex geospatial requirements into maintainable front-end components that scale in real-time contexts.
15 years of coding experience
18 years of employment as a software developer
English, Swedish
Stackoverflow
10,129reputation
1.7mreached
58answers
9questions
java
top-1%
multithreading
top-1%
reflection
top-1%
terminology
top-5%
leaflet
top-5%
Github Skills (22)
reflection10
javascript10
lib10
multithreading10
leaflet10
testing10
css10
ui-design10
geojson10
java10
front-end-development10
coordinate-systems10
maps10
ux-design9
terminology9
Programming languages (11)
Github contributions (5)
perliedman/leaflet-routing-machine
Feb 2014 - Jun 2021
Control for routing in Leaflet
Role in this project:
Front-end Developer
Front-end DeveloperContributions:19 releases, 1 review, 466 commits in 7 years 5 months
Contributions summary:Per primarily contributed to the front-end development of a Leaflet routing machine. They implemented line visualization features, including adding hooks for dragging and dropping. The user also refactored the code and improved the UI, making it more user-friendly for users.
leafletrouting
kartena/Proj4Leaflet
Dec 2012 - Aug 2017
Smooth Proj4js integration with Leaflet.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:64 commits, 15 PRs, 15 pushes in 4 years 8 months
Contributions summary:Per primarily focused on integrating Proj4js, a JavaScript library for coordinate transformations, with the Leaflet mapping library. They added new features such as `L.TileLayer.Proj4TMS` to support custom tile layers, and fixed errors. The user also adapted examples to a new API and moved them to a new folder, and added a TMS example. Finally, the user updated examples after a namespace change, made the code compatible with Leaflet 0.7 and fixed tests.
leafletpolygonsproj4jsgeopackagegeodesy
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