Frederick Stewart
Independent contract software engineer · Willoughby, Ohio
Summary
Six years building .NET APIs, manufacturing systems, and AI integrations across manufacturing, utilities and auto finance. Available for contract work.
What I do
- AI & LLM integration
- Industrial & manufacturing systems
- .NET & API modernization
- End-to-end product build
Selected work
An internal agent and MCP platform for a manufacturer
An industrial products manufacturer · 2026 – present — Internal teams have AI tooling that reads and acts on the ERP and the document stores.
Consolidating a utility's .NET estate, and putting AI identity verification inside it
A Fortune 500 utility · 2023 – 2025 — One service where there had been several, on a new schema, with identity verification running and enough telemetry to debug a failure without exposing customer documents.
Legacy shop-floor C++ applications folded into one MES
An industrial materials manufacturer · 2020 – 2021 — HR, ERP, MRP and machine control in one system instead of separate applications, per-user layouts that follow operators between terminals, and a department working in Git and Azure DevOps.
Credit decisioning rules that change when the law does
An auto finance lender · 2022 – 2023 — Rule changes ship with coverage that can be shown, and new fields no longer wait on a DBA.
A raffle platform that runs a whole event from a phone
My own product — live · 2026 — A live product that runs a full event on hardware the volunteers already own: catalog, ticket sales, allocation, the draw, winner notification.
Background
- 2026 – present · Internal AI agent and MCP platform — An industrial products manufacturer
- 2023 – 2025 · Contract software engineer — A Fortune 500 utility, via a national staffing firm
- 2021 – 2023 · Contract software engineer — An auto finance lender, a bulk transport carrier, and a regional food producer
- 2020 – 2021 · Software engineer — An industrial materials manufacturer
- 2020 · Full-stack .NET software engineering — Tech Elevator, Cleveland
- 2015 · CNC machinist — A precision machine shop — improved grinding productivity by 30%
- 2010 – 2014 · United States Marine Corps — Corporal — F/A-18 jet engines and fuel systems
Technologies
.NET · .NET 6 · .NET 8 · Anthropic API · Azure DevOps · C# · C++ · Cloudflare Workers · CQRS · D1 · DevExpress · Entity Framework · Git · Hono · HttpClient · IFS ERP · Model Context Protocol · MS SQL · MSTest · OLE DB · Oracle · Progress Corticon · R2 · REST · Stripe · SvelteKit · Twilio · TypeScript · Visual Studio 2022 · Zod