Ousama Allahham
Senior Software Engineer @Eaton
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WORK HISTORY
Senior Software Engineer @Eaton
Mississauga, ON, CA
Modernized critical engineering and production automation infrastructure supporting $100M/month in transactions across 9 national sites, transitioning a legacy monolith to a high-performance.NET 8 modular plugin-based architecture.Architected a high-concurrency WPF frontend using ReactiveUI and Dynamic Data, reducing UI thread blocking by 80% and enabling real-time, high-frequency data streaming with declarative filtering/sorting for complex engineering datasets.Engineered a scalable system backbone with Clean Architecture, by applying Domain-Driven Design Vertical Slice Architecture, and SOLID principles, significantly improving maintainability and decoupling business logic from infrastructure.Orchestrated a large-scale Azure cloud migration, implementing secure private networking, automated data workflows, and centralized secret management to replace fragile on-premise systems.Automated mission-critical workflows via internal API integrations and Azure Functions, resulting in a 75% reduction in required engineering headcount for manual job processing.Strengthened enterprise security and compliance by implementing RBAC and Identity Management via Entra ID, ensuring secure access across all distributed Canadian sites.Developed a custom JSON-driven business rules engine, empowering non-technical stakeholders to update complex business logic dynamically without requiring code changes or deployment cycles.Accelerated delivery velocity by designing CI/CD pipelines with GitHub Actions, automating the testing and deployment of independent, decoupled modules.
EDUCATION
McMaster University
Bachelor of Engineering and Biomedical Engineering
ABOUT OUSAMA ALLAHHAM
I am a Senior Software Engineer with a unique foundation in Biomedical and Materials Engineering from McMaster University. Over the past 4+ years, I have specialized in building the bridge between complex physical engineering systems and high-performance, scalable software.Currently at Eaton, I lead the modernization of critical enterprise infrastructure. My focus is on transforming legacy on-premise monoliths into modular, cloud-native architectures that support $100M+ in monthly transactions.Core Expertise:Architecture: Domain-Driven Design Vertical Slice Architecture, and Plugin-based Systems.Cloud: Azure migrations, secure private networking, and serverless automation (Azure Functions).Frontend: High-concurrency WPF development with ReactiveUI, reducing UI blocking.I am driven by the challenge of solving tangible, real-world problems through robust software; I translate high-stakes business requirements into scalable architectures that drive measurable efficiency.Fluent in English, French and Arabic | Azure Fundamentals certified
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