Systems Architect & Developer

Liam McMahon

Architecting scalable C# .NET solutions, high-volume database migrations, and cloud integrations. Building robust enterprise web and mobile applications.

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Stack: C# | .NET MAUI | SQL Server | Azure
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System Profile

I am Liam McMahon, a Belfast-based Systems Architect and Full-Stack Developer. I specialize in building secure, transactional backend infrastructures, enterprise database schema migrations, and cloud integrations.

My expertise lies in designing robust applications using the **C# .NET ecosystem**, configuring database synchronization engines (SQL Server, MySQL, PostgreSQL), and deploying secure financial systems. Over the years, I have successfully executed database migrations containing tens of millions of records and deployed automated cloud synchronization pipelines.

I build solutions that guarantee data integrity, absolute uptime, and seamless integration between legacy localized servers and cloud platforms.

20+ Years Backend Architecture
50M+ Records Migrated Safely
100% Uptime Architecture SLA

Engineered Solutions

Relational database systems, custom web suites, and cross-platform apps.

Bespoke Ordering Platform

A custom online ordering and booking system built for local Belfast shops and restaurants. Licensed as a bespoke setup with an affordable monthly subscription model.

Enterprise SQL Migrator

A transactional database upgrade utility written in C# supporting automated dry-runs, data validations, and structural synchronization between SQL Server and MySQL.

Cloud Ledger Sync

A secure audit and finance tracking system. Integrates local accounting server software databases with Azure cloud backup vaults using AES encryption.

iOS & Android Clients

Cross-platform mobile applications developed using Xamarin and .NET MAUI. Features offline data mapping, webhooks, and cloud database updates.

Technical Matrix

Core competencies in enterprise software engineering.

Backend Architecture

  • C# (.NET Core / Framework)
  • ASP.NET Core Web APIs
  • WPF & Desktop Applications
  • Test-Driven Development (TDD)

Database & Migrations

  • SQL Server (SSMS, T-SQL)
  • MySQL & PostgreSQL
  • Schema Migrations & Upgrade Engines
  • Automated ETL Data Pipelines

Cloud & Integrations

  • Azure App Services & Key Vault
  • AWS Cloud Server Sync
  • OAuth & Secure API Gateway Integrations
  • CI/CD Automation (GitHub Actions)

Initiate Contact

If your organization requires database migration consulting, cloud server integration, or bespoke online ordering setups, get in touch to coordinate a system review.

System Architect: Liam McMahon

HQ: Belfast, Northern Ireland

Focus: C# .NET, Data Migration, Cloud Services