Önder Ceylan
Freelance Software Engineer at Independent Contractor
Randstad, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolÖnder Ceylan is a freelance software engineer and Google Developers Expert in Web Technologies with 13 years of experience building full-stack web and mobile solutions across React, Angular, Vue, Node.js and cloud platforms like AWS and Azure. He combines hands-on engineering with technical leadership—architecting enterprise-grade systems, driving test automation and DevOps practices, and mentoring teams to raise product quality and delivery consistency. Önder is an active open-source contributor (notably on the pwa-asset-generator project that automates icons, splash screens and manifests), and regularly shares knowledge through international talks, workshops and local meetups. His background in structural engineering gives him a systems-minded approach to designing resilient, maintainable architectures and automations. Comfortable both in code and in product-focused collaboration, he prioritizes measurable improvements in developer productivity and user-facing reliability.
13 years of coding experience
BSc Civil Engineer, BSc Civil Engineer at Istanbul Technical University
Github Skills (12)
html10
puppeteer10
javascript10
web-app-manifest10
image-generation10
pwapp10
typescript-types9
typescript9
typescripts9
ios8
css8
android8
Programming languages (5)
Github contributions (5)
elegantapp/pwa-asset-generator
Aug 2019 - Jan 2023
Automates PWA asset generation and image declaration. Automatically generates icon and splash screen images, favicons and mstile images. Updates manifest.json and index.html files with the generated images according to Web App Manifest specs and Apple Human Interface guidelines.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:71 releases, 35 reviews, 269 commits in 3 years 5 months
Contributions summary:Önder primarily worked on the PWA asset generation project, focusing on automating the creation and management of various PWA assets. They implemented features for generating icons, splash screens, favicons, and other platform-specific image assets. The user also updated the manifest.json and index.html files, integrating the generated assets according to the specifications of the Web App Manifest and Apple Human Interface guidelines. Key technologies and areas of focus include web development, image generation, and managing PWA-related configurations.
icon-sizesmanifestautomatesweb-app-manifestspecs
elegantapp/pwa-workshop-angular-firebase
May 2019 - Sep 2020
Build a production ready PWA with Angular and Firebase! This workshop consists of multiple steps for producing a PWA by transforming a regular web app - Ionic Conference App into a PWA, finally deploying it to Firebase.
Contributions:320 commits, 1 PR, 250 pushes in 1 year 4 months
deployingworkshopconsistsproduction-readyfirebase
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