Freelancer profile translated to English.
Back to original languageAbout Jonathan
Freelance developer specializing in web, mobile, and PWA applications
Do you have an application to create, modernize, or repair? I assist VSEs, SMEs, startups, businesses, and associations in creating concrete, reliable solutions adapted to their users.
I intervene in particular on:
• iOS and Android mobile applications
• Installable PWAs usable offline
• Business tools, extranets, and client portals
• MVPs and evolution of existing products
• Auditing, fixing, and stabilizing fragile projects
• Migration from Angular, Ionic, Cordova, and Capacitor
• Push notifications, authentication, and Firebase databases
• Performance, accessibility, UX, and store publishing
My specialty is also taking over existing projects: hard-to-maintain code, slow applications, recurring bugs, outdated dependencies, or projects abandoned by a previous provider. I start by analyzing the existing situation to propose a realistic intervention, without unnecessarily rebuilding what already works.
Main technologies: Angular 20, Ionic 8, Capacitor 8, TypeScript, Firebase, PWA, REST API, GitHub Actions, iOS, and Android.
I can also help with more specific needs: Stencil.js, web components, Three.js, complex business logic, and native development with Capacitor.
My approach is based on clear communication, a defined scope, clean documentation, and technical choices adapted to the actual need.
As a TIH provider, my services can be valued within the framework of the OETH. A certificate can be provided.
Based on the Opal Coast — local or fully remote missions.
English
Fluent
French
Native or bilingual
Can work on-site
Étaples (up to 50km), Étaples (up to 50km), Boulogne-sur-Mer (up to 50km), Calais (up to 50km), Forbach (up to 50km)
Experience
- AJP PRODUCTIONSkaatshSOFTWARE PUBLISHINGJanuary 2022 - June 2022 (5 months)Complete development of the Kaatsh app (iOS & Android): product design, UI/UX, architecture, implementation, and store publication. Key features: salary comparison with real-time geolocation, search by job/city, favorites, offline mode, notifications. Stack: Ionic + Angular + Capacitor. App Store Link: https://apps.apple.com/fr/app/salaire-et-carrière-kaatsh/id1616179742
- europronosDeveloperSOFTWARE PUBLISHINGOctober 2018 - December 2019 (1 year and 3 months)Étaples, FranceComplete development of the Europronos app (iOS & Android), from design to store launch. Sports prediction app with match schedules, team profiles, favorites, and real-time notifications. Monetization through advertising and in-app subscriptions. Stack: Ionic, Angular, Firebase (Auth, Firestore, FCM).
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Education
- Computer Development Designer2isa2016
- Developer2isa2015
Certifications
- Google Digital MarketingGoogle Verification ID J8W BCC MSW2020