Tá Entregue (Tá Liso): the digital shopping centre for local businesses in Pará

Context and problem

In Pará, everyday commerce goes far beyond restaurants: the corner grocery, the pharmacy, the water and gas supplier, the building-supplies shop, the fishing and boating stores. The big delivery platforms were designed for a different reality, centred on restaurants in large cities, and leave much of this local retail out — or without an experience that fits the region's merchants and customers.

Tá Liso — "the delivery app that gets you" — was created to fill that gap: a digital shopping centre that reflects local merchants in Pará, where people can buy and sell almost anything, at affordable prices and with a more human service, close to the daily lives of sellers and buyers.

To work, the operation had to connect three audiences in real time — buyers, sellers and couriers — and support expansion to other cities in the North. The product has since been rebranded as Tá Entregue; the company website still carries the original brand.

Expansion runs on franchises: in each city, the platform is operated by a local franchisee. The technology had to support this multi-city model from day one.

My responsibility

• Tech Lead and Senior Developer for the platform at StarNorte Tecnologia.
• Feature architecture, code reviews and mentoring junior and mid-level developers.
• Built the Customer and Partner apps and led the team that built the Courier app, the company website and the web dashboard, also contributing code to them.
• A team of 4 developers: 2 mobile and 2 full-stack.

Solution

One platform with five fronts — customer app, partner (merchant) app, courier app, company website and web dashboard — all talking to the same backend.

Customer app: town selection, categories from food and groceries to fishing, boating and building supplies, a special-offers showcase with filters by discount and price, shop pages with opening status and a sectioned menu, products with add-ons, a basket, online or cash-on-delivery payment and a delivery fee set by each shop.

Partner app: order management with real-time notifications, menu updates, stock control and sales analysis.

Courier app: sign-up with service type, courier and vehicle photos, a live map with the courier's position, an online/offline toggle to receive jobs, routes, earnings tracking and ratings.

Company website: brand presentation, access to the shops, partner acquisition ("Become a partner") and app downloads.

Web dashboard: the web version of shop management — tracking and managing orders, general administration of the shop and customer support.

Architecture decisions

• Three independent Flutter apps, one per audience, consuming the same API, Cloud Functions and Firebase database: business rules stay centralised in the backend and each app evolves on its own.
• BLoC/Cubit for state management across the three apps, with the same architecture pattern in each.
• Firestore to keep order status in sync between customer, shop and courier in real time.
• Google Maps API for location, tracking map and routes.

Stack

• Flutter
• Dart
• Firebase
• Google Maps API
• Firestore

Results

5,000+

registered shops

300+

active shops

15

branches (city franchises) across northern Brazil

5k+

downloads of the customer app on Google Play

5k+

downloads of the courier app on Google Play

5

integrated fronts: 3 apps, company website and web dashboard

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