E-ÑATA

E-ÑATA is a Senegalese marketplace that connects individuals: sellers publish listings, buyers browse them and get in touch. Its line is "Connecter · Vendre · Acheter". I am one of its co-founders and I take part in its full-stack development with the team, on Next.js.

It is where engineering, product and entrepreneurship meet in my work: the same person who writes the code also has to decide what is worth building.

Selling to a stranger, or buying from one, depends on trust: is the listing real, is the seller reliable, and where does the conversation happen?

E-ÑATA is built around that question for the Senegalese market. Its promise is to buy and sell with confidence, with prices in CFA francs and a single place to find a listing, talk to the seller and follow the exchange.

A marketplace that acts as a technical intermediary between sellers and buyers. Listings are reviewed by an administrator before they become public, conversations stay inside the platform, and sellers build a reputation through ratings.

The platform deliberately stays out of payments: money and goods change hands directly between the two parties.

Co-Founder, contributing to full-stack development with the team.

• Next.js
• Firebase Authentication
• Firebase database
• Firebase Security Rules
• Firebase App Check
• Cloudinary
• Resend
• Google reCAPTCHA v3
• Vercel

Next.js applied to product engineering and a marketplace.

• Accounts with email and password (email verification required) or Google sign-in.
• Listings with photos, description, category, price in CFA francs and optional location.
• Administrator validation of every listing before it is published, plus moderation and account suspension.
• Browsing by category and search, sorted by most recent or best rated.
• Built-in messaging tied to an order, with text and voice messages.
• Order management between buyer and seller.
• Seller ratings from 1 to 5 stars, unlocked after at least five messages have been exchanged.
• Favourites, and category subscriptions that trigger push notifications for new listings.
• A downloadable user manual for sellers and buyers.

• Writing Firebase Security Rules that restrict each user to their own listings, orders and conversations while leaving administrators in control.
• Handling voice messages end to end: recording in the browser, uploading to Cloudinary and playing them back in the conversation.
• Putting every listing through validation before publication without slowing the seller down.
• Protecting the platform against bots with App Check and reCAPTCHA v3 without adding friction to sign-up.

• Authentication relies on Firebase Authentication, with email verification and Google OAuth.
• Data access is limited to the account owner and administrators through Firebase Security Rules.
• Firebase App Check with reCAPTCHA v3 protects the backend against automated abuse.
• Photos and audio recordings are stored on Cloudinary rather than in the database.
• Push notifications cover new messages and new listings in followed categories.
• No tracking or advertising cookies: only the session tokens needed for authentication are stored locally.

• The marketplace is live at www.e-nata.com and usable on mobile and desktop.
• The full journey is in place: sign-up, publication, validation, messaging, order and rating.
• A user manual and terms of use ship with the product.

• Trust is a feature: validation, ratings and moderation matter as much as publishing listings.
• Staying out of payments made it possible to launch earlier, with less risk.
• Writing the security rules alongside the data model avoids reworking everything later.