Observations
Notes on Data Engineering, Artificial Intelligence, and the spaces in between.
Essays & Notes
The Fragmented Rails: Building Payment Orchestration Across African Banking Infrastructure
Apr 15, 2026A technical deep-dive into the architectural decisions behind Tunu Store's payment layer — connecting M-PESA, Stripe Connect, and a dozen other rails without a unified abstraction layer. What we built, what failed, and what we learned about money on the African internet.
Border Reset: The Hidden Identity Infrastructure Problem in European Rental Markets
Mar 2, 2026Every time a person moves between EU countries, their rental history, credit record, and verified identity effectively disappear. This is not a legal problem — it's an infrastructure problem. Here is what we built to solve it.
The CDN Lie: Rebuilding Asset Delivery for African Markets
Feb 10, 2026How we rebuilt Tunu Store's asset delivery layer from a single-region bottleneck to a multi-region edge deployment — and what serving creators in Lagos, Nairobi, and Accra taught us about CDN assumptions that were never designed with Africa in mind.
Replicating Boris Cherny's Claude Code Setup on Your Local Machine
Jan 07, 2026A step-by-step guide to replicate Boris Cherny's minimalist setup for Claude Code, emphasizing parallel instances, shared docs, slash commands, subagents, hooks, and verification loops.
The Schema of the State: Why Kenya Needs a Temporal Data Lake
Dec 14, 2025GovTech fails when it focuses on apps instead of architecture. A technical argument for Temporal Databases (SQL:2011) and a Federated Data Lakehouse for the public sector.
The Kratt Law: Algorithmic Fairness in the World's Digital Republic
Nov 28, 2025An analysis of Estonia's legal framework for AI agents, the mathematical definitions of fairness, and how we audit 'black box' government algorithms.
From Soil to SQL: Data Engineering the Kenyan Coffee Supply Chain
Oct 10, 2025An engineering deep-dive into building a distributed IoT telemetry system for coffee cooperatives. Rust on the edge, MQTT over 2G, and the math of yield prediction.