Freelancer profile translated to English.
Back to original languageAbout Caleb
Expert Full-Stack Web & Mobile Developer | React Native | Astro | React | Adonis.js
Launching a SaaS or a mobile app? I help startups and SMEs transform a complex idea into a high-performing, scalable, and market-ready product.
What I bring to your project:
- Web Performance: Core Web Vitals optimization for top SEO (Lighthouse Score > 90).
- Reduced Time-to-Market: Using React Native & Expo to deploy on iOS and Android with a single codebase.
- Robust Architecture: Typed NestJS backend for zero production bugs.
End-to-End Support:
More than just a developer, I manage the entire product lifecycle:
1. Design: Rapid prototyping on Figma (UI/UX).
2. Dev: Clean, TypeScript-typed, and maintainable code.
3. Ops: Automated deployment (CI/CD) via GitHub Actions for total stability.
Why choose me?
My dual Web & Mobile expertise allows you to centralize your development and reduce maintenance costs.
Let's discuss your project now to turn your idea into a concrete product!
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- Apex MobileFull Stack Web & Mobile Developer / DevOps / UI-UXE-COMMERCEMay 2026 - Today (3 months)Paris, France
- Designed a proprietary CLI tool for automated initialization and scaffolding. Major productivity gain of 2 to 3 weeks of development per client application, automating 90% of the technical cycle (variable injection, store configuration, Figma mockups visual integration. Coupled with the generation of e-commerce applications connected via Shopify's Storefront GraphQL API.
- Integrated and ported key Shopify ecosystem mobile applications (Customer Reviews with Judge.me, Marketing Automation with Klaviyo, etc.) to enhance the native user experience.
- Implemented the official Shopify OAuth 2.0 authentication flow for secure merchant onboarding.
- Automated the retrieval and secure storage of Access Tokens (Admin and Storefront API) within the centralized backend.
- Modeled and developed a centralized AdonisJS server on PostgreSQL structured for multi-tenancy.
- Implemented a "Kill Switch" middleware and native encryption of API keys at rest for strict client access security.
- Led and implemented an infrastructure for sending mass, automated notifications (behavioral triggers). Orchestrated via Redis and Boringnode queues with packet processing and asynchronous cleanup of obsolete tokens.
- Implemented an exhaustive data tagging plan (micro-interactions, e-commerce behaviors, UX errors, crashes) by encapsulating PostHog via a Clean Architecture abstraction layer. Configured webhooks to collect this data, aggregate it on AdonisJS, and feed a custom CRM dashboard for merchants to track their KPIs (ROI, notification open rates).
- Deployed and isolated the ecosystem using Docker containers via Coolify on a VPS. Automated Over-The-Air (OTA) application updates using EAS Update and automated CI/CD workflows.
- TelostimTelostimE-COMMERCEApril 2026 - April 2026Paris, France
- Complete redesign of the footer and creation of custom sections to enhance user experience and maximize conversions.
- Integration and configuration of Judge.me on product pages, the homepage, and creation of a dedicated customer reviews page.
- Coded the blog ecosystem with advanced features for filters, dynamic pagination, and similar article suggestions.
- Developed the decision-making tree, technical configuration, and integration of a personalized quiz to guide users to the ideal product.
- Enzo ArnaudetWeb Front-End Developer & UI/UX DesignerApril 2026 - May 2026 (1 month)Paris, France
- Designed a clean, modern, and high-end interface, showcasing the work of a video editor/photographer.
- Implemented fluid page transition scroll effects and reveal animations with GSAP, without compromising performance.
- Drastically improved Core Web Vitals, navigation fluidity, and natural referencing compared to the old version.
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Education
- Computer Science Bachelor's DegreeUniversity of EvryL’objectif de la Licence Informatique est de fournir aux étudiants un socle de connaissances et de compétences solides en informatique leur permettant de comprendre les enjeux et domaines scientifiques, techniques et industriels en rapport avec le traitement automatique de l’information par tous types de machines électroniques (calculateurs, systèmes embarqués, ordinateurs, consoles de jeux vidéo, robots, automates, etc.)