Senior Full Stack Engineer, Minneapolis, MN

Jack Freiermuth

I build the tooling that makes AI agents reliable enough for a team to depend on.

Twelve years shipping production web platforms, most recently React and TypeScript front ends for a fintech trading platform serving over 600,000 traders. These days I spend most of my time on agentic engineering: the pipelines, MCP servers, and guardrails that turn AI tooling into something a team can actually rely on.

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Open to senior and staff roles in full stack, frontend, and AI tooling. Remote or Twin Cities.

12+

Years shipping production web apps

Custom MCP servers built

600k+

Traders served by the platform

Selected work

Things I have built

All 8 projects

Case study2025 - 2026

Agentic Development Pipeline

One command takes a Jira ticket to a reviewed draft pull request, with humans gating every step that matters.

TypeScriptNode.jsMCPClaude CodeJira+1

Case study2025 - present

LifeOS

A self-hosted personal automation platform: 25 MCP servers, scheduled agents, and a dashboard, running on hardware in my house.

TypeScriptPythonReactViteNode.js+4

Case study2025 - present

MCP Server Collection

Twenty five Model Context Protocol servers, including several that wrap apps shipping no public API at all.

TypeScriptNode.jsPythonMCPJXA+1

In progress2026

Palbox

A breeding planner for Palworld that parses a real game save in the browser pipeline and solves multi-generation breeding paths.

PythonTypeScriptCloud RunDockerGCS+1

All 8 projects

What is next

If you are building something that needs to be reliable, I would like to hear about it.

Get in touch