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Frederick Nortan

@fredericknortan

Senior full-stack engineer at 3Pillar modernizing retail microservices and building secure APIs across integrated operations.

United States

Message

At 3Pillar, I architect and maintain C#/.NET microservices for retail workflows, shaping service boundaries, API contracts, and business logic across integrated operations.

I modernized enterprise applications at Active Logic and NeptoLab, connecting REST APIs and services while improving data access and supporting production features.

I also designed an AI knowledge assistant with Python and FastAPI, using document ingestion, embeddings, and vector retrieval to answer questions with citations and access controls.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

3Pillar

Mar 2024 - Present (2 years 7 months)

Architect and maintain C#/.NET ASP.NET Core microservices for high-volume retail workflows, design secure REST APIs, and modernize legacy components into Docker/Kubernetes services. Lead design reviews, code reviews, and mentoring while applying AI-assisted development tools.

Software Engineer

Active Logic

Jul 2021 - Mar 2024 (2 years 8 months)

Delivered full-stack enterprise applications with C#, ASP.NET Core, Angular, and SQL Server, modernized .NET Framework applications, and improved integration reliability with retry/backoff and structured error handling. Owned features across the full development lifecycle and collaborated with clients in Agile/Scrum.

C#ASP.NET Core Web APIs Angular TypeScript Entity Framework SQL Server JavaScript WCF SOAP REST GraphQL Git GitHub CI CD Agile Scrum

Application Developer

NeptoLab

Jan 2018 - Jul 2021 (3 years 6 months)

Built and maintained enterprise web applications using C#, ASP.NET MVC/Core, SQL Server, and Angular, modernized store-operation applications, and designed SQL Server schemas and queries. Supported source control, code reviews, and automated regression testing.