Android6 min read
Architecting Sub-50ms Transaction Pipelines for 10,000+ Android POS Terminals
Deep dive into EMV kernel integration, asynchronous binary protocols over cellular networks, and offline SQLite WAL buffer synchronization.
Mohammad Kiani
Senior Full-Stack & Android Engineer · Vice President @ MNPC
I build systems end to end — from ESP32 firmware and MikroTik networks to Android payment terminals running on hundreds of devices, and cloud platforms in .NET, Node and Python. I lead the development team at MNPC and love turning complicated requirements into clean, reliable, fast products.
Key Production Metrics● فعال
Active POS Terminals
100s+
MNPC Nationwide
Active IoT Users
600+
RFID & Biometrics
SedaMod AI Latency
< 3ms
C++ JUCE + SIMD
Apps Delivered
150+
Since 2016
10+ years engineering production systems✓ تایید شده
Technical Competencies & Tools(24 skills)
Click category tabs to filter skills
★C# / .NET 9
8+ yrsLead / Architect
★ASP.NET Core
8+ yrsAdvanced
Node.js / Express
6+ yrsAdvanced
Python / Django
4+ yrsIntermediate
PHP / Laravel
5+ yrsAdvanced
★Android (Kotlin/Java)
8+ yrsPrincipal / VP
★Payment POS Systems
5+ yrsEnterprise Lead
★Tauri v2 / Rust
2+ yrsDSP & Client
WPF / WinForms
7+ yrsAdvanced
★React 19 / Vite
5+ yrsAdvanced
★Next.js 15
4+ yrsAdvanced
TypeScript
5+ yrsAdvanced
Tailwind CSS
4+ yrsExpert
Astro
2+ yrsPerformance Lead
★ESP32 / ESP8266
6+ yrsFirmware Lead
★RFID & Biometrics
6+ yrsHardware Integration
Embedded C/C++
5+ yrsAdvanced
★MikroTik RouterOS
6+ yrsEnterprise Specialist
VoIP PBX / SIP
5+ yrsAdvanced
CCTV & IP Cameras
5+ yrsDeployment
Docker / Compose
4+ yrsDevOps
SQL Server
8+ yrsAdvanced
★PostgreSQL / RLS
5+ yrsSecurity & Isolation
Drizzle / Prisma ORM
3+ yrsModern Typesafe
Interactive Console
Interactive Console & Quick Navigation
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About Me
✓ About & Bio
Mohammad Kiani
Senior Full-Stack & Android Engineer · Vice President @ MNPC
I build systems end to end — from ESP32 firmware and MikroTik networks to Android payment terminals running on hundreds of devices, and cloud platforms in .NET, Node and Python. I lead the development team at MNPC and love turning complicated requirements into clean, reliable, fast products.
10+years shipping
150+apps delivered
100sPOS devices live
600+IoT users
Mohammad Kiani — Senior Full-Stack & Android Engineer · Vice President @ MNPC
I build systems end to end — from ESP32 firmware and MikroTik networks to Android payment terminals running on hundreds of devices, and cloud platforms in .NET, Node and Python. I lead the development team at MNPC and love turning complicated requirements into clean, reliable, fast products.
The harder the problem, the better. In my free time I experiment with new frameworks and hardware, read technical docs, and help other developers.
MNPC Payment POSAndroid payment terminals with real-time warehouse integration, deployed nationwide. SedaModUltra-low-latency AI voice changer and soundboard for Persian creators and gamers. MrInvoiceMulti-tenant invoicing SaaS with a visual template builder and online payments. IoT Attendance & AccessFingerprint/RFID attendance devices integrated with student access monitoring.
2021Senior Android Developer & Vice President — Madakto Novin Processes (MNPC) · Tehran
2019Web Developer & Software Programmer — Agricultural Education & Extension Organization
2021Network Specialist — Sapra Tejarat Fardad · Tehran
2019Network Specialist — Asia Imaging Center · Khorramabad
2016Freelance Software Developer — Independent
Architecting Sub-50ms Transaction Pipelines for 10,000+ Android POS TerminalsDeep dive into EMV kernel integration, asynchronous binary protocols over cellular networks, and offline SQLite WAL buffer synchronization. Bypassing Carrier CGNAT with MikroTik WireGuard Mesh & ZeroTier OverlaysHow to maintain bulletproof remote access to isolated distributed industrial devices behind dynamic IPs and strict mobile carrier NAT barriers. WASM Embedded PostgreSQL in Node.js: Why We Ditched Dedicated DB Clusters for Edge MicroservicesRunning real PostgreSQL inside the V8 process via PGlite for ultra-portable, self-contained single-binary microservices without daemon bloat.
backend: [C# / .NET, ASP.NET Core, Node / Express, PHP / Laravel, Python / Django] frontend: [React, Next.js, TypeScript, Astro, Tailwind] mobile: [Android, Kotlin, Java, WPF / WinForms, Tauri / Rust] iot: [ESP32, ESP8266, RFID, Fingerprint, C++] network: [MikroTik RouterOS, VoIP / PBX, CCTV / IP Cameras, Docker, Nginx] data: [SQL Server, PostgreSQL, MySQL, Drizzle, Prisma]
Full-Stack Architecture
End-to-End Architecture: Silicon to Cloud
Select any node to view architectural details.
POS Fleet
Android payment terminals with real-time warehouse sync on hundreds of devices.
Featured work
Production Systems & Case Studies
MNPC Payment POS
Android payment terminals with real-time warehouse integration, deployed nationwide.
SedaMod
Ultra-low-latency AI voice changer and soundboard for Persian creators and gamers.
MrInvoice
Multi-tenant invoicing SaaS with a visual template builder and online payments.
IoT Attendance & Access
Fingerprint/RFID attendance devices integrated with student access monitoring.
Engineering Log & Deep Dives
Engineering Log & Deep Dives
Read notes →
MikroTik5 min read
Bypassing Carrier CGNAT with MikroTik WireGuard Mesh & ZeroTier Overlays
How to maintain bulletproof remote access to isolated distributed industrial devices behind dynamic IPs and strict mobile carrier NAT barriers.
PostgreSQL5 min read
WASM Embedded PostgreSQL in Node.js: Why We Ditched Dedicated DB Clusters for Edge Microservices
Running real PostgreSQL inside the V8 process via PGlite for ultra-portable, self-contained single-binary microservices without daemon bloat.
Career Progression
Career Progression
commit a3f9c1e2021 – present
Senior Android Developer & Vice President
Madakto Novin Processes (MNPC) · Tehran
- Lead developer of Android payment POS terminals — one of Iran’s major payment providers.
- Full integration between POS devices and warehouse systems: real-time sales and stock.
- Promoted to Vice President & Development Team Lead in 2024.
commit 91aa07b2019 – present
Web Developer & Software Programmer
Agricultural Education & Extension Organization
- Built 100+ web, mobile and desktop apps for national agricultural programs.
- National monitoring and festival systems, reporting modules.
commit c01d4e22021 – 2023
Network Specialist
Sapra Tejarat Fardad · Tehran
- Installed and maintained networks for schools and corporate offices.
commit 5be0f192019 – 2019
Network Specialist
Asia Imaging Center · Khorramabad
- Designed and maintained the full network infrastructure.
commit 0f00d1a2016 – present
Freelance Software Developer
Independent
- Accounting, CRM, HRM and game-server management systems.
- IoT attendance devices with ESP32/ESP8266; MikroTik networks for 60+ users.
- Notification automation with SMS gateways and Telegram bots.
Stack
Technical Stack Overview
Battle-tested across all tiers: firmware, systems, distributed backends and modern web interfaces
Backend
Frontend
Mobile & Desktop
IoT & Embedded
Network & Infra
Data
Get in Touch
Have a project, a technical question, or an opportunity? Feel free to reach out — I would be delighted to connect.