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About Me

Nathan Stewart
I4cTime
Architecting the future. One system at a time.

Senior Full Stack & AI Engineer with 17+ years in IT — from data center operations and enterprise middleware to modern AI-integrated products. At Evernorth I'm primary developer on 7+ production React applications, own CI/CD platform architecture (ArgoCD GitOps, Kubernetes, Helm) across 10+ apps, and ship production AI features with LangChain. AI-native by practice: Claude Code, custom MCP servers, and agentic workflows are my daily toolkit. Under I4C Studio I ship q-ring, ProtonShift, MineUI, Cryo, Groundrules, The Synthesist, a set of free browser tools, and AI-voice interfaces like this site's host. INTP-T. Father, husband, and relentless systems thinker. Currently open to new senior roles — fully remote, US-based on Central time.

At a Glance

RoleSenior Full Stack & AI Engineer
StatusOpen to Work
LocationRemote · US Central time
Experience17+ years
PersonalityINTP-T

My Story

My career started in 2008 at a Department of Defense computing center, monitoring 40 IBM MVS mainframe domains and managing thousands of backup tapes daily. It was high-pressure, low-margin-for-error work — and it taught me that systems thinking isn't optional, it's survival.

From there I moved into enterprise data center operations and network monitoring, eventually landing at Express Scripts (now Evernorth Health Services) where I spent over a decade evolving from middleware infrastructure engineer to automation specialist to software engineer. I built deployment platforms, diagnostic tooling, and internal apps that turned raw backend data into actionable interfaces.

Somewhere along the way, the frontend pulled me in. React, TypeScript, Next.js, Tailwind — the modern web stack became my playground. I started combining that with AI integration: prompt engineering workflows, voice interfaces with ElevenLabs, and LLM-powered tooling. The line between infrastructure and product blurred, and I liked it there.

Today I build independently under I4C Studio. q-ring (a keyring that gives AI coding agents policy-governed access to real secrets), ProtonShift (native Linux gaming configuration), MineUI (Minecraft servers without the terminal), Cryo (the Alienware command center Linux never had), Groundrules (a visual studio for AI agent instruction files), free browser tools like Tanko, Koyomi and Kataribe, and this very site with its voice-native host — all expressions of the same drive: architect systems that feel alive, push boundaries, and make complex things accessible.

What I Work With

Build
ReactNext.jsTypeScriptTailwind CSSPySide6 / QMLTauri
Power
Node.jsPythonRustPostgreSQLKubernetesVercel
Integrate
Claude CodeMCPAI SDKElevenLabsLangChainPrompt Engineering

Beyond the Code

Travel

New cultures, new perspectives — every place I go rewires how I think about design and systems.

Family

Father and husband first. Everything I build is anchored by the people who matter most.

Gaming

Minecraft server architecture led to MineUI; tuning Proton, gamescope and a hot Alienware led to ProtonShift and Cryo. Play becomes prototype.

Systems Thinking

INTP-T wiring. I see patterns, connections, and architecture in everything — code, conversations, and coffee shops.

What Drives Me

Build

Architect systems that feel alive — voice-native interfaces, agent-ready tooling, products that ship instead of demo.

Learn

Continuous acquisition of new skills and paradigms. Stay curious, stay ahead.

Share

Knowledge grows when shared. Open source contributions, mentoring, and community engagement.

Skills & Expertise

Profile overview

Frontend
92 / 100
Backend
86 / 100
AI / Agents
89 / 100
Platform / CI-CD
87 / 100
Cloud & Systems
86 / 100
Data Viz
82 / 100

Frontend Systems

React / Next.js95%
TypeScript92%
Tailwind CSS90%
Framer Motion85%
Data Visualization82%

Backend Infrastructure

Node.js90%
PostgreSQL / Drizzle ORM85%
Java72%
Python80%
REST / GraphQL88%
Middleware Systems85%

AI / ML Systems

LLM Integration (Claude / GPT)90%
MCP (Model Context Protocol)90%
Agentic Workflows / Claude Code92%
LangChain85%
Prompt Engineering92%
ElevenLabs Voice AI88%
AI SDK / Agents85%
Vector / Embeddings75%

PLATFORM & CI/CD

Kubernetes / OpenShift85%
ArgoCD / GitOps88%
Helm / Kaniko85%
GitHub Actions / Jenkins90%
Docker / Podman85%
Backstage / Nx Monorepo85%
Linux Systems88%
AWS / Vercel85%

17+ years of enterprise experience across front-end, back-end, AI/ML, and infrastructure.

Experience

Years in IT
17
+
Years in healthcare enterprise
13
+
Production React apps
7
+
Apps on Kubernetes CI/CD
10
+
  1. Mar 2021 — PresentCurrent

    Senior Full Stack Engineer — Platform & Data Visualization

    Evernorth Health Services

    Fully remote senior role. Primary developer on 7+ production React applications with Spring Boot/Java and FastAPI/Python backends. Own CI/CD platform architecture across the team and ship production AI features.

    React 19Next.jsTypeScriptPythonFastAPIKubernetesArgoCDHelmLangChainAI Integration
    Primary developer on 7+ production React apps (React 17–19, Next.js, Vite) serving enterprise health monitoring, incident analytics, and operations teams
    Own CI/CD pipeline architecture: Jenkins shared libraries, ArgoCD GitOps, GitHub Actions with self-hosted runners, Kaniko, Helm charts across 10+ apps on Kubernetes/OpenShift
    Built production AI features with LangChain (Anthropic + OpenAI): AI chat assistant, AI incident summaries, and suggested-action systems
    Led greenfield apps from wireframe to production: AI insights dashboard, mobile deployment, Electron desktop tooling
    Architected the team's Nx monorepo and Backstage developer portal; built Grafana dashboards with custom plugin development
    Implemented Okta authentication across all team applications; authored Apache Airflow DAGs for automation
  2. Sep 2016 — Mar 2021Completed

    IT Engineer — Automation

    Express Scripts

    Enterprise data visualization and automation engineering. Designing, building, and maintaining internal tools that bring backend data into actionable UIs.

    PythonUIData VisualizationAutomationCloud DeploymentsInternal ToolingShell Scripting
    Built automated deployment platform for cloud infrastructure
    Created SSL certificate management site improving team workflow
    Developed RPM upload site for repository management
    Engineered port hijack detection system (Bourne Shell)
  3. Sep 2013 — Sep 2016Completed

    IT Engineer

    Express Scripts

    Design, engineer, review, analyze, and modify middleware infrastructure systems related to application support and integration. Full lifecycle ownership of enterprise middleware in a healthcare environment.

    PythonMiddlewareIntegrationApplication SupportEnterprise SystemsShell Scripting
    Engineered middleware infrastructure for 10,000+ employee enterprise
    Built log extraction scripts (Korn Shell) for self-service diagnostics
    Maintained critical application support systems in regulated healthcare
  4. May 2013 — Sep 2013Completed

    IT Operations Analyst

    Express Scripts

    Provided IT infrastructure services and support. Solutions for technical problems of moderate scope and complexity. Outage response, procedure development, and regulatory compliance.

    IT OperationsInfrastructureTroubleshootingCompliance
    Promoted from QA Engineer Associate to Operations Analyst
    Developed new work procedures for operational efficiency
    Maintained regulatory compliance logs and verification records
  5. Oct 2012 — May 2013Completed

    Engineer Associate QA

    Express Scripts

    Provided IT infrastructure services and support to internal and external customers. Operated under direction to perform Operations functions of the production support team in delivery of scheduled events and incidents.

    QAInfrastructureProduction SupportComplianceDocumentation
    Provided solutions to technical problems of moderate scope and complexity
    Responded to outages and implemented follow-up procedures
    Used tools, playbooks, and procedures to ensure stability of environments and applications
  6. Jun 2011 — Sep 2012Completed

    Computer Operator

    Rock-Tenn Company

    Enterprise network monitoring and data center operations. Managed Priority 1 issues, maintained hardware, and ensured infrastructure stability.

    Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data Center
    Monitored enterprise network systems and infrastructure
    Managed Priority 1 issue escalation and resolution using PeopleSoft's ServiceONE
    Supported Data Center hardware installation/removal (pSeries, iSeries, HP, SAN Switches)
    Maintained HP3000 nightly system saves and AS400 backups
  7. Jul 2008 — Jun 2011Completed

    Computer Operator

    Smurfit-Stone

    Enterprise network monitoring and data center operations. Technical troubleshooting within an enterprise environment including system crashes, slow-downs, and data recoveries.

    Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data Center
    Actively monitored network systems, infrastructure, and applications
    Engaged and tracked Priority 1 issues using PeopleSoft's ServiceONE
    Initialized HP3000 nightly system saves and ensured AS400 backups completed
    Maintained helpdesk support role dispatching calls to on-call personnel
    Facilitated outside vendors with servicing Data Center equipment
  8. Jan 2008 — Jun 2008Completed

    Computer Operator

    TechGuard Security (DOD DECC)

    Defense Enterprise Computing Center (DOD). Monitored IBM MVS mainframe domains and resolved urgent silo issues within strict SLAs.

    IBM MVSJES2MainframeTape LibraryPowderHorn 9310Microsoft Excel
    Monitored 40 IBM MVS mainframe domains
    Resolved urgent silo issues within the required 10-minute timeframe using JES2 and MVS commands
    Managed 1,500 tapes daily via PowderHorn 9310 Tape Library
    Shipped and received 2,000 daily/weekly backup tapes from offsite storage

Work With Me

I4C Studio is open for senior engineering roles and select collaborations — full-stack product work, AI integration, and platform architecture. Fully remote, US Central time.

Full-StackAI & Voice17+ YearsRemote · US Central
$ cat availability.json
{
"status": "open_to_work",
"roles": ["Senior/Lead Full Stack", "AI Engineering", "Platform"],
"remote": true,
"timezone": "US Central · UTC-6/-5"
}