
+Tendero: a weekly microlending core banking system for 600+ shopkeepers
In 12 months, DataLab built the core banking system for +Tendero, a Colombian fintech that offers short-term loans to corner-store owners. The system runs weekly-cycle microloans designed around how neighborhood stores actually operate, and has served 600+ shopkeepers and issued more than COP 3 billion in loans.

+Tendero by the numbers
Figures reported by DataLab and the client for the period shown.
- Client
- +Tendero
- Industry
- Fintech · Microlending
- Country
- Colombia
- Duration
- 12 months
Context
+Tendero is a short-term lending fintech for tenderos, the owners of Colombia's neighborhood corner stores. Its product is a microloan that follows the real rhythm of the store: weekly cycles, small amounts and a large number of borrowers. For that model to work, the technology has to move as fast as the checkout counter.
The challenge for +Tendero
A traditional core banking system is built for loans measured in months or years, not for a weekly cycle with small amounts and high borrower volume. An off-the-shelf core would have meant bending the business to fit the software, with manual workarounds for everything the tool couldn't do. +Tendero needed the opposite: software that starts from its model.
The hypothesis
If the core is built around the weekly cycle (disbursement, collection and a new loan), the fintech can serve hundreds of shopkeepers with small loans without growing its operations team as fast as its portfolio.
What we did
- Started with ideation of the platform and its business model alongside +Tendero's team.
- Modeled the weekly microloan cycle with +Tendero's team: application, disbursement, collection and a new loan.
- Built the custom microlending core banking system with short-term lending rules at its center.
- Worked in Scrum for 12 months from our nearshore team in Bogotá, reviewing each sprint's release with the business at the end of every cycle.
- Added traceability per shopkeeper and per loan to follow the portfolio week by week.
- Measured shopkeepers served and amount issued as the two metrics that show whether the model scales.
Results for +Tendero
Within 12 months, the platform reached 600+ shopkeepers and issued more than COP 3 billion in loans. The weekly cycle, which would have been the exception in a generic core, is the rule on this platform.
Stack and tools
- Custom microlending core banking
- Weekly loan cycle
- Disbursement and collections
- Portfolio management
- Scrum sprints
What we learned
The financial product sets the rules, not the software. When the core respects the customer's real rhythm, in this case one week, small-ticket lending becomes a business that can grow.
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