Freelancers using Openlayers in JinanFreelancers using Openlayers in Jinan
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Yong Zhang's avatar
Yong Zhang
Jinan, China
Software engineer building web, GIS, 3D & data products
New to Contra
Software engineer building web, GIS, 3D & data products
Cover image for 20M+ Spatial Data Architecture &
20M+ Spatial Data Architecture & Web Mapping Performance Reworked a GIS data pipeline after the existing map architecture could no longer handle 20M+ spatial features effectively. I redesigned the storage, map-service and front-end access layers around PostgreSQL/PostGIS, GeoServer and WMS, covering data management, service publishing, layer rendering, feature queries and spatial analysis. I also isolated GIS preprocessing, analysis and rendering behind clear interfaces so regular front-end and back-end developers could work against stable contracts without depending on GIS internals.
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Cover image for Telecom Facility Inspection & GIS
Telecom Facility Inspection & GIS Management Platform Turned an open-ended request — how to combine field inspection, check-ins and GIS — into an implementable Web + mobile system. I mapped real operating workflows, management goals, staff routes, scheduling, task dispatch and completion loops, then defined responsibilities across Web/mobile, GIS data, map services, APIs and feature scope. I also worked with the project manager to break the GIS scope into executable development tasks and delivered the core GIS capabilities.
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Cover image for 2D / 3D Linked Graphic
2D / 3D Linked Graphic Editor Built an interactive web editor that connects 2D design content with a live 3D model preview. The workflow supports graphic editing, model node selection, UV/texture mapping, and real-time visual updates between the 2D canvas and 3D surface. I worked on the front-end architecture and core interaction logic using Fabric.js and Three.js.
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Cover image for Family Task & Rewards Management
Family Task & Rewards Management System A full-stack system built for real household use, covering tasks, rewards, account balances and family rules. I designed the product logic and system structure, implemented the Vue/TypeScript + Spring Boot + PostgreSQL stack, and iterated the business model based on actual usage feedback.
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Openlayers(2)