About Ralph
French
Native or bilingual
English
Fluent
Experience
- Flash expressWeb & Mobile Developer — PWA CouriersLOGISTICS AND SUPPLY CHAINMay 2026 - Today (3 months)Creation of a PWA business application to digitize the connection between businesses and motorcycle couriers in Brazzaville (Malt freelance mission).Objective: to enable businesses to manage their delivery requests faster and provide couriers with a simple mobile interface to track their missions.Achievements:- Development of a mobile-first PWA (Next.js 15) optimized for 3G/4G networks- Dedicated interfaces for businesses and couriers + admin dashboards (9 screens)- Yango-style broadcast assignment system (first available courier wins the race)- Multi-zone pricing management (52 neighborhoods, 5 zones, additive pickup + dropoff pricing)- Multi-channel notifications: WhatsApp Cloud API + SMS fallback + Web Push- Courier KYC photos (ID, license, motorcycle) and business KYC (Commercial Register, brand name)- Supabase backend with RLS and atomic RPC for conflict-free booking- Architecture designed to evolve into a logistics SaaS
- MADIF WaxWeb Developer — Showcase WebsiteJanuary 2025 - March 2025 (2 months)Paris, FranceCreation of a showcase website for a premium African fashion brand in Paris, with an elegant, inclusive, and brand-image-oriented positioning.Objective: to enhance the brand's credibility, showcase collections, and facilitate contact.Achievements:- Responsive showcase website design (mobile-first) based on the brand's creative brief- Page structure and highlighting of the brand's universe- HTML/CSS/JS integration with animations and product gallery- SEO and performance optimization (Core Web Vitals)- Deployment and configuration on Netlify with a custom domain
- Coopérative YelessaFull-Stack Developer & System ArchitectJanuary 2025 - Today (1 year and 7 months)Paris, FranceClient Case: Yelessa Cooperative (agriculture, Central Africa)Problem: Agricultural stakeholders had no reliable visibility on market prices and no structured channel for B2B buying/selling — blind negotiations, informal transactions, loss of value.Solution: Design and development of Soko (Zandou), an agricultural price intelligence platform + B2B marketplace, in web (Next.js) and mobile app (Flutter).- Collection and analysis system for agricultural market prices- B2B marketplace with a complete transactional pipeline (offer, negotiation, delivery)- Analytics dashboards (Metabase) for real-time price monitoring- Full-stack architecture Next.js + Supabase (PostgreSQL) + REST API, hardened RLS- Dedicated server infrastructure: Docker, Caddy, n8n; FR/EN internationalizationResult: Platform in production, mobile app published on the Google Play Store, giving cooperative members clear access to prices and a structured buying/selling channel.
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Education
- Master in Financial EngineeringESGF2013Gestion de patrimoine
Certifications
- AMFBarchen2013
- Google AI EssentialsGoogle2025