Climate • Data • Technology

Jimmy Matewere

Building the tools that turn climate data into decisions

I build climate risk models, geospatial platforms, and tools for national climate data. Currently a Graduate Intern at Malawi's Department of Climate Change and Meteorological Services, where I build tools like Nimbus Forecast to process climate data across 100+ stations, alongside serving as Founding CTO of Ascend Spatial Labs, a geospatial intelligence startup.

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Spatial modeling and flood risk mapping through Ascend Spatial Labs, drone-based mapping and HEC-RAS flood analysis for infrastructure decisions in the SADC region.

What I Build

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Cyclone Freddy: five weeks, one storm

An interactive map story of Tropical Cyclone Freddy, the longest-lasting tropical cyclone on record. It follows the storm across the Indian Ocean and into the days of extreme rain over southern Malawi in March 2023, built from IBTrACS best-track data and CHIRPS satellite rainfall.

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Cyclone Freddy crossing the Indian Ocean, its track coloured by intensity, with the chapter card and timeline

Phiri Media

Website for Phiri Media, a Malawian marketing and creative agency: a Sanity-driven site with a lead-qualifying onboarding wizard and a case study system that lays itself out from the CMS.

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Afrimax Malawi Website Rebuild

Full marketing site rebuild for Afrimax Malawi, a Blantyre-based ISP. Built with Next.js, Sanity CMS, Mapbox GL JS, and Tailwind v4. CMS-driven plans, devices, payment methods, resellers, and coverage map. Deployed to Vercel.

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Latest Insights

Phiri Media homepage hero reading "Clarity before campaigns." in large type, with Work With Us and Our Work buttons and the agency description.

Sep 28, 2026

What started as practice

Building phirimediagroup.org for a Malawian creative agency: the default layouts I cut, a lead wizard I patched until I fixed its state, and a case study grid that still doesn't lay itself out the way I meant it to.

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Want to work together?

Whether it's a climate data system, a geospatial platform, or a full-stack product — reach out and let's talk through what you're building.

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