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About

Built by a senior engineer who ships

Blenzo is a boutique consultancy. No account managers, no hand-offs — you work directly with the person writing the code.

Abubakar Siddique · Founder

Eight years of production engineering, focused on the hard parts.

I’m a senior mobile engineer specializing in fintech, POS and payment systems. Independently vetted in the top 3% globally, I’ve spent 8+ years building software that handles real money in real environments — where a dropped transaction is a lost sale, not a log line.

My work lives at the messy intersection of mobile and hardware: offline-first architectures, Stripe Terminal integrations, RFID and BLE devices, and the sync engines that keep everything consistent when the network isn’t there. Most recently I shipped a multi-terminal Android POS system that processed $1.5M AUD across 100+ SUNMI devices in 10 days with zero critical failures.

Blenzo exists to bring that senior, production-grade engineering to teams building payments and mobile products that can’t afford to break.

Top 3%
Independently vetted, globally
8+ yrs
Production engineering
$1.5M
AUD processed on shipped POS
100+
Payment devices in the field
Specializations

Where I go deep

POS & Payments

Stripe Terminal, Tap-to-Pay, RFID and multi-terminal checkout at live-event scale.

Offline-First Systems

Queuing, sync engines and conflict resolution for unreliable connectivity.

Hardware Integrations

BLE, RFID, serial/UART, SUNMI devices, kiosks and barcode scanners.

Mobile Engineering

Android (Kotlin), iOS (Swift), React Native and Kotlin Multiplatform.

Contact

Let’s build something that works.

Reach out to discuss your project. We typically respond within 24 hours.