FEMN — Socioeconomic Surveys

The problem

FEMN (Fundación para la Educación de Mujeres y Niños — Foundation for the Education of Women and Children) needed a digital tool for field evaluators: record adult socioeconomic surveys and infant enrollment forms in areas with limited connectivity, sync data to the central platform when online, and generate PDFs of the completed documents for families.

The solution

I developed the app with Flutter 3 targeting Android, iOS, and Web, using Firebase as the backend. The design is offline-first: data is saved locally and synced to Firestore when a connection is available. Riverpod manages sync state reactively.

PDF generation (enrollment forms and socioeconomic study documents) happens on the device using a Dart library, allowing evaluators to deliver a printable document to the family during the visit itself. The app supports multiple languages (flutter_localizations) to adapt to the regional contexts where the foundation operates.

My role

I designed the offline-first architecture, implemented the survey and enrollment form modules, built the on-device PDF generation module, and configured the Firestore sync logic including conflict handling for concurrent edits.

Outcome

Field evaluators can complete surveys without an internet connection and generate the PDF document on-site. Automatic sync ensures the central team has access to data as soon as the evaluator regains connectivity. The direct impact is a reduction in the time between data collection in the field and availability at headquarters.

Notable learning

Offline-first design requires thinking about data differently: it’s not just “save locally if no internet” — you have to design data models so that conflicts are deterministically resolvable. In this project, each survey is owned by the evaluator who created it and carries a creation timestamp — which makes merge rules simple and predictable.