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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. Creator of ProtonShift, q-ring, Groundrules, The Synthesist, and AI-voice interfaces. INTP-T. Father, husband, and relentless systems thinker. Currently open to new senior roles — fully remote, splitting the year between the US and Colombia (UTC-5 year-round).
At a Glance
RoleSenior Full Stack & AI Engineer
StatusOpen to Work
LocationRemote · UTC-5 (US ⇄ Colombia)
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. q-ring (a quantum-inspired secret manager), Groundrules (a visual studio for AI agent instruction files), The Synthesist (an AI-powered synthesis game), and this very site — 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 CSSFramer Motion
Power
Node.jsPostgreSQLPythonVercelDocker
Integrate
AI SDKElevenLabsLLM IntegrationPrompt EngineeringMCP
Beyond the Code
Travel
Splitting my time between the US and Colombia. New cultures, new perspectives — every place 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 — a desktop app for managing servers via Podman. 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
- Mar 2021 — PresentCurrent
Senior Full Stack Engineer — Platform & Data Visualization
Evernorth Health ServicesFully 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 IntegrationPrimary developer on 7+ production React apps (React 17–19, Next.js, Vite) serving enterprise health monitoring, incident analytics, and operations teamsOwn CI/CD pipeline architecture: Jenkins shared libraries, ArgoCD GitOps, GitHub Actions with self-hosted runners, Kaniko, Helm charts across 10+ apps on Kubernetes/OpenShiftBuilt production AI features with LangChain (Anthropic + OpenAI): AI chat assistant, AI incident summaries, and suggested-action systemsLed greenfield apps from wireframe to production: AI insights dashboard, mobile deployment, Electron desktop toolingArchitected the team's Nx monorepo and Backstage developer portal; built Grafana dashboards with custom plugin developmentImplemented Okta authentication across all team applications; authored Apache Airflow DAGs for automation - Sep 2016 — Mar 2021Completed
IT Engineer — Automation
Express ScriptsEnterprise data visualization and automation engineering. Designing, building, and maintaining internal tools that bring backend data into actionable UIs.
PythonUIData VisualizationAutomationCloud DeploymentsInternal ToolingShell ScriptingBuilt automated deployment platform for cloud infrastructureCreated SSL certificate management site improving team workflowDeveloped RPM upload site for repository managementEngineered port hijack detection system (Bourne Shell) - Sep 2013 — Sep 2016Completed
IT Engineer
Express ScriptsDesign, 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 ScriptingEngineered middleware infrastructure for 10,000+ employee enterpriseBuilt log extraction scripts (Korn Shell) for self-service diagnosticsMaintained critical application support systems in regulated healthcare - May 2013 — Sep 2013Completed
IT Operations Analyst
Express ScriptsProvided IT infrastructure services and support. Solutions for technical problems of moderate scope and complexity. Outage response, procedure development, and regulatory compliance.
IT OperationsInfrastructureTroubleshootingCompliancePromoted from QA Engineer Associate to Operations AnalystDeveloped new work procedures for operational efficiencyMaintained regulatory compliance logs and verification records - Oct 2012 — May 2013Completed
Engineer Associate QA
Express ScriptsProvided 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 SupportComplianceDocumentationProvided solutions to technical problems of moderate scope and complexityResponded to outages and implemented follow-up proceduresUsed tools, playbooks, and procedures to ensure stability of environments and applications - Jun 2011 — Sep 2012Completed
Computer Operator
Rock-Tenn CompanyEnterprise network monitoring and data center operations. Managed Priority 1 issues, maintained hardware, and ensured infrastructure stability.
Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data CenterMonitored enterprise network systems and infrastructureManaged Priority 1 issue escalation and resolution using PeopleSoft's ServiceONESupported Data Center hardware installation/removal (pSeries, iSeries, HP, SAN Switches)Maintained HP3000 nightly system saves and AS400 backups - Jul 2008 — Jun 2011Completed
Computer Operator
Smurfit-StoneEnterprise network monitoring and data center operations. Technical troubleshooting within an enterprise environment including system crashes, slow-downs, and data recoveries.
Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data CenterActively monitored network systems, infrastructure, and applicationsEngaged and tracked Priority 1 issues using PeopleSoft's ServiceONEInitialized HP3000 nightly system saves and ensured AS400 backups completedMaintained helpdesk support role dispatching calls to on-call personnelFacilitated outside vendors with servicing Data Center equipment - 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 ExcelMonitored 40 IBM MVS mainframe domainsResolved urgent silo issues within the required 10-minute timeframe using JES2 and MVS commandsManaged 1,500 tapes daily via PowderHorn 9310 Tape LibraryShipped and received 2,000 daily/weekly backup tapes from offsite storage
- Mar 2021 — PresentCurrent
Senior Full Stack Engineer — Platform & Data Visualization
Evernorth Health ServicesFully 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 IntegrationPrimary developer on 7+ production React apps (React 17–19, Next.js, Vite) serving enterprise health monitoring, incident analytics, and operations teamsOwn CI/CD pipeline architecture: Jenkins shared libraries, ArgoCD GitOps, GitHub Actions with self-hosted runners, Kaniko, Helm charts across 10+ apps on Kubernetes/OpenShiftBuilt production AI features with LangChain (Anthropic + OpenAI): AI chat assistant, AI incident summaries, and suggested-action systemsLed greenfield apps from wireframe to production: AI insights dashboard, mobile deployment, Electron desktop toolingArchitected the team's Nx monorepo and Backstage developer portal; built Grafana dashboards with custom plugin developmentImplemented Okta authentication across all team applications; authored Apache Airflow DAGs for automation - Sep 2016 — Mar 2021Completed
IT Engineer — Automation
Express ScriptsEnterprise data visualization and automation engineering. Designing, building, and maintaining internal tools that bring backend data into actionable UIs.
PythonUIData VisualizationAutomationCloud DeploymentsInternal ToolingShell ScriptingBuilt automated deployment platform for cloud infrastructureCreated SSL certificate management site improving team workflowDeveloped RPM upload site for repository managementEngineered port hijack detection system (Bourne Shell) - Sep 2013 — Sep 2016Completed
IT Engineer
Express ScriptsDesign, 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 ScriptingEngineered middleware infrastructure for 10,000+ employee enterpriseBuilt log extraction scripts (Korn Shell) for self-service diagnosticsMaintained critical application support systems in regulated healthcare - May 2013 — Sep 2013Completed
IT Operations Analyst
Express ScriptsProvided IT infrastructure services and support. Solutions for technical problems of moderate scope and complexity. Outage response, procedure development, and regulatory compliance.
IT OperationsInfrastructureTroubleshootingCompliancePromoted from QA Engineer Associate to Operations AnalystDeveloped new work procedures for operational efficiencyMaintained regulatory compliance logs and verification records - Oct 2012 — May 2013Completed
Engineer Associate QA
Express ScriptsProvided 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 SupportComplianceDocumentationProvided solutions to technical problems of moderate scope and complexityResponded to outages and implemented follow-up proceduresUsed tools, playbooks, and procedures to ensure stability of environments and applications - Jun 2011 — Sep 2012Completed
Computer Operator
Rock-Tenn CompanyEnterprise network monitoring and data center operations. Managed Priority 1 issues, maintained hardware, and ensured infrastructure stability.
Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data CenterMonitored enterprise network systems and infrastructureManaged Priority 1 issue escalation and resolution using PeopleSoft's ServiceONESupported Data Center hardware installation/removal (pSeries, iSeries, HP, SAN Switches)Maintained HP3000 nightly system saves and AS400 backups - Jul 2008 — Jun 2011Completed
Computer Operator
Smurfit-StoneEnterprise network monitoring and data center operations. Technical troubleshooting within an enterprise environment including system crashes, slow-downs, and data recoveries.
Control-MBMC Impact ExplorerSCOMPeopleSoftAS400HP3000Data CenterActively monitored network systems, infrastructure, and applicationsEngaged and tracked Priority 1 issues using PeopleSoft's ServiceONEInitialized HP3000 nightly system saves and ensured AS400 backups completedMaintained helpdesk support role dispatching calls to on-call personnelFacilitated outside vendors with servicing Data Center equipment - 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 ExcelMonitored 40 IBM MVS mainframe domainsResolved urgent silo issues within the required 10-minute timeframe using JES2 and MVS commandsManaged 1,500 tapes daily via PowderHorn 9310 Tape LibraryShipped 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, UTC-5 year-round.
Full-StackAI & Voice17+ YearsRemote · UTC-5
$ cat availability.json
{
"status": "open_to_work",
"roles": ["Senior/Lead Full Stack", "AI Engineering", "Platform"],
"remote": true,
"timezone": "UTC-5 · US ⇄ Colombia"
}