On-device speech to text in Flutter: Apple SpeechTranscriber and Android ML Kit through a platform channel first, Whisper on device through whisper.cpp for the languages the phone cannot do. Measured on an iPhone 15 Pro and a Nokia T20.
Hard paywall vs freemium for a subscription app: what RevenueCat's data across 115,000 apps shows, a side-by-side table, and why I kept a Free plan in VitaCal but put the paywall first in VitaMood.
How VitaCal turns a meal photo into calories: a Gemini vision call, JSON checked on the server, user correction, photo deletion, cost control and Health sync.
To connect a PLC to the cloud, put a gateway on the PLC's network that polls it over Modbus TCP and forwards events over HTTPS. The Raspberry Pi gateway design I use, with offline buffering.
ZUGFeRD, XRechnung and Peppol BIS Billing 3.0 all carry EN 16931 invoice data in different packaging. How the formats differ, what Germany's B2B mandate accepts, and how I built and validate them in an invoicing SaaS.
Flutter and React Native compared on rendering, native integration, hiring and long-term cost, based on production apps built in both since 2020. Flutter wins for hardware-heavy and design-heavy apps; React Native wins when the team already writes React.
A practical guide to building an event-driven serverless system on AWS with Lambda, SNS, SQS and DynamoDB: queue-per-consumer fan-out, CQRS projections, idempotency, dead-letter queues and Terraform, from a health-data platform running more than 90 functions.
A buyer's guide to hiring a contract software developer in South Africa: how to vet candidates in one interview, what the contract must contain, how IP assignment and change orders work, and the red flags that predict a failed engagement.
A fractional CTO is a part-time chief technology officer who sets architecture, hires developers and owns delivery for a few days a month. When it makes sense, what it costs relative to a full-time hire, and what to ask before signing.