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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)
Andreas Smidelöv's avatar
Andreas Smidelöv
proSollentuna, Sweden
Streamline Workflows with AI Automation Expert
Streamline Workflows with AI Automation Expert
Cover image for Geographic Entity Management for Wildlife Compliance
Geographic Entity Management for Wildlife Compliance
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Cover image for Song-Guesser Game
Song-Guesser Game
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Cover image for Background Check System Development and Maintenance
Background Check System Development and Maintenance
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Openlayers(1)
Anees Sohail's avatar
Anees Sohail
Lahore, Pakistan
Full-Stack Developer | Custom Stores + Stripe
Full-Stack Developer | Custom Stores + Stripe
Cover image for As part of the team
As part of the team at Sevrin Limited, I worked on Dialog, a stakeholder engagement platform developed for a Netherlands-based organization. The platform provides a centralized environment for managing stakeholder information, interactions, activities, and engagement data. It includes interactive mapping capabilities that help visualize and manage location-based stakeholder information. The system brings stakeholder data and engagement activities together, making complex information easier to track, access, and manage. Working collaboratively with the team, I contributed to building and improving functionality for a real-world platform focused on effective stakeholder engagement.
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Cover image for Designed and built a premium
Designed and built a premium e-commerce experience focused on visual storytelling and conversion. Featuring immersive product showcases, category browsing, product details, interactive shopping bag, quantity management, and a streamlined checkout experience. Built to make the brand feel premium while keeping the shopping journey simple and intuitive. Have a brand that needs a high-end digital experience? Let’s work together.
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Cover image for During my year as a
During my year as a Full-Stack Developer at Invobyte, I worked on the admin side of the Complaint Management System (CMS) for the Punjab Land Records Authority. I built administrative dashboards and internal workflows to help operators effectively track, assign, and resolve citizen grievances in real time.
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Cover image for Spent the past year at
Spent the past year at Invobyte as a Full-Stack Developer, where I built and optimized the citizen-facing side of the Complaint Management System (CMS). Focused on creating a seamless, accessible user experience—from account registration to real-time complaint tracking—ensuring citizens can easily navigate government services.
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Openlayers(1)