Android Developer Consultancy In App Plot Imaging for Ona

Offer description

The Alliance of Bioversity International and CIAT is seeking a senior Android developer for a three-month consultancy to develop an in-app whole-plot image capture feature for the Ona Android application. Ona is a mobile and web digital phenotyping tool used by breeding teams in Sub-Saharan Africa. The application supports crop research for common bean, cowpea, sorghum and other crops, using images and machine-learning models to measure traits such as plant stand, flower count and pod count. The consultant will develop a reliable, production-ready feature that enables users to capture an image or image set of an approximately 4-metre plot without leaving the Ona app. The captured data must be automatically linked to the active plot and include the required metadata for automated plant-stand counting. The consultant will assess and prototype multiple approaches, including in-app panorama capture, guided multi-frame capture, short video sweeps, stitch-free counting and single wide-angle images. The selected approach will be integrated into the Ona app, tested on target Android devices and validated in the field with breeding teams. The work includes reviewing the existing Ona capture workflow and codebase, developing prototypes, evaluating image quality and device performance, implementing the selected solution, supporting field validation and handing over maintainable, documente...

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