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Open to new opportunities

I turn half-formed ideas into software people actually use.

I'm Keegan. Eight years building web, SaaS and mobile applications with React, Next.js, Node.js, Python, C# and .NET, deployed on Azure. Lately most of my work is AI: LLM integrations, RAG pipelines and AI agents that help businesses streamline real workflows.

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Build

Full-stack delivery, end to end

Automate

AI agents and workflow systems

Ship

MVP to deployed platform
8
Years building for the web
3
Companies shipped for
AI
Agents, chatbots, automation
About

Full Stack AI Engineer | React, Node, Python, RAG, AI/ML, APIs, AI Agent & Automation

Keegan Lembcke

My journey in software started with a curiosity about how simple ideas could become useful applications. That led me from frontend development into full-stack engineering, and eight years later I enjoy taking a project from the first conversation to a complete product.

My toolkit spans React, Next.js, Node.js, Python, C#, .NET and ASP.NET Core, with Microsoft Azure, CI/CD, Docker and Azure DevOps for getting things into production. I've built for healthcare, SaaS, e-commerce and business services, and I also ship mobile apps with Swift, Flutter and React Native.

Over the last few years a lot of my work has shifted toward AI: OpenAI APIs, LLMs, RAG, AI agents and automation that help businesses streamline processes and build smarter products. I care as much about scalable architecture, reliable APIs and how a product feels to use as I do about whether it works.

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Based in
Phoenix, AZ — open to remote
Focus
Full-stack, AI, cloud & mobile
Open to new opportunities
How I work

Built to be used, not just launched.

01

Understand

I start with the business problem, not the stack. Half-formed ideas get turned into a scope someone can actually agree to before any code is written.

02

Build

Full-stack delivery end to end — interface, API, database, auth, integrations and deployment. One person accountable for whether the thing works.

03

Sustain

Performance, security and how the product feels to use decide whether a business benefits from it. That work continues after launch, not just up to it.

Skills

Tools I build with.

Full-stack across web, cloud and mobile, with most recent work in AI agents, RAG and automation.

Full-stack development

  • React
  • Next.js
  • Node.js
  • Python
  • TypeScript
  • JavaScript
  • C#
  • .NET / ASP.NET Core
  • REST APIs
  • MySQL / SQL Server

AI, automation & cloud

  • AI Agent Development
  • OpenAI API
  • LLMs
  • RAG
  • AI Automation
  • Python AI Development
  • Microsoft Azure
  • Azure Functions
  • Azure DevOps

Mobile

  • iOS Development
  • Swift
  • SwiftUI
  • Flutter
  • Dart
  • React Native
  • Firebase
  • Push Notifications
  • Payment Gateway Integration
Selected work

Projects worth talking about.

All projects
Loadwise freight quoting platform

Loadwise

An AI agent platform that turns freight brokers' inboxes into a quoting and booking engine — built end to end, from ingestion pipeline to the rep-facing app.

  • Full-Stack Development
  • Python
  • Node.js
  • React
  • TypeScript
  • PostgreSQL
  • AI Agent Development
  • LLM APIs
  • Prompt Engineering
  • Document Processing
  • API Integration
  • Docker
Live siteCase study
Claimsight underwriting workspace

Claimsight

A domain-specific AI workspace for underwriters and claims teams, turning submission intake, policy comparison and audit review from manual document work into a decision-ready queue.

  • Full-Stack Development
  • React
  • TypeScript
  • Python
  • Node.js
  • AI/LLM Development
  • AI Agents
  • Multi-Agent Systems
  • RAG
  • Workflow Automation
  • Structured Data Extraction
  • OAuth
Live siteCase study
QAgentic agentic QA platform

QAgentic

An agentic QA platform that tests e-commerce sites end to end from the outside, catching regressions before customers do, without touching the codebase.

  • React
  • Next.js
  • TypeScript
  • Python
  • Node.js
  • PostgreSQL
  • AI Agent Development
  • LLM APIs
  • Prompt Engineering
  • Playwright
  • Browser Automation
  • E2E/QA Automation
  • Computer-Use Agents
  • Mobile Test Automation
  • Distributed Systems
  • Docker/Kubernetes
  • Cloud Infrastructure
  • CI/CD
Live siteCase study
ClaimForge patent claim charting platform

ClaimForge

An AI platform for IP teams that maps patent claims to real-world products at scale, turning weeks of manual claim-chart work into a scored, evidence-backed analysis.

  • Python
  • React
  • Next.js
  • AI/LLM Development
  • RAG (Retrieval-Augmented Generation)
  • NLP (Natural Language Processing)
  • Vector Databases & Semantic Search
  • PostgreSQL
  • Web Scraping & Data Extraction
Live siteCase study
FrontLine AI receptionist platform

FrontLine

An AI employee for service businesses that answers every call and message, books appointments, chases unpaid invoices, and fills quiet slots in the diary.

  • AI/LLM Development
  • Voice AI/Conversational AI
  • Python
  • Backend Development
  • React
  • Next.js
  • API Integration
  • WhatsApp
  • SMS & Telephony Integration
  • Workflow Automation
  • Database/CRM Development
Live siteCase study

Showing 5 of 22 projects

Experience

Where I’ve worked.

  1. Senior Full-Stack & AI Developer

    Document Technologies / Managed ITAug 2022 — Aug 2026

    Full-time · Tempe, AZ

    • Led scalable web and SaaS application development for healthcare, business services, and technology using React, Next.js, Node.js, Python, and cloud architectures.
    • Built AI-powered healthcare and SaaS solutions, including LLM integrations, RAG pipelines, AI agents, intelligent search, document processing, and workflow automation with Python and OpenAI APIs.
    • Developed secure backend systems and APIs using Node.js, Python, FastAPI, MySQL, REST APIs, authentication, role-based access control, and third-party integrations.
    • Partnered with product, design, and business teams to turn complex requirements into intuitive applications, emphasizing healthcare workflows, SaaS dashboards, automation, scalability, performance, and UX.
    • Provided technical leadership across architecture, development, code reviews, testing, deployment, optimization, troubleshooting, mentoring, and AI automation integration.

  2. Full-Stack .NET Developer

    Document Technologies / Managed ITJun 2020 — Aug 2022

    Full-time · Tempe, AZ

    • Developed enterprise full-stack applications with C#, ASP.NET Core, React, SQL Server, and Azure for SaaS, healthcare, financial services, and business clients.
    • Built REST APIs, microservices, authentication, and data-driven .NET/C# backend services, plus responsive React interfaces.
    • Implemented secure, scalable Azure solutions using App Services, Functions, SQL, Storage, Key Vault, and monitoring.
    • Automated builds, testing, deployments, infrastructure, and releases with Azure DevOps and Git across development, staging, and production.
    • Partnered with cross-functional teams on architecture, code reviews, troubleshooting, performance optimization, and technical mentoring.

  3. Mobile App Developer

    NuvodiaJun 2018 — Jun 2020

    Full-time · Chandler, AZ

    • Developed high-quality mobile applications for iOS and cross-platform environments using Swift, Flutter, and React Native, delivering scalable solutions across healthcare, SaaS, e-commerce, and business applications.
    • Built responsive and feature-rich mobile experiences with Flutter and React Native, while developing native iOS functionality with Swift and integrating REST APIs, authentication, push notifications, maps, payments, and third-party services.
    • Designed and implemented mobile application architectures and reusable components, focusing on performance, security, offline capabilities, smooth navigation, and consistent user experiences across iOS and Android platforms.
    • Integrated mobile applications with cloud services, backend APIs, databases, Firebase, analytics, and automated workflows, ensuring reliable data synchronization and scalable application infrastructure.
    • Collaborated with designers, product managers, backend engineers, and QA teams throughout the full mobile development lifecycle, including planning, development, testing, App Store deployment, debugging, performance optimization, and ongoing maintenance.
Education

Where I studied.

  1. BSc Computer Science (BCompSc)

    The University of ArizonaSep 2015 — May 2018

    Bachelor of Computer Science.

Questions

Things people usually ask.

Are you available for new work?

Yes — open to full-time roles and selected contract work, based in Phoenix, AZ and comfortable remote or hybrid. Email is the fastest way to reach me.

What do you work with?

React and Next.js on the front; Node.js, Python, FastAPI, C#, .NET / ASP.NET Core, MySQL and SQL Server behind it, deployed on Azure with Azure DevOps. Swift, Flutter and React Native for mobile. Recent work leans heavily on LLMs, RAG, AI agents and the OpenAI API.

What does the AI work actually involve?

LLM integrations, RAG pipelines, AI agents, intelligent search, document processing and workflow automation — mostly Python and the OpenAI API — plus the plumbing that makes them reliable enough to put in front of real users.

Can you take something from idea to launch?

That's most of what I do. Scope, interface, API, database, auth, integrations, deployment — from an early MVP through to a fully deployed platform.

Open to new opportunities

Hiring for full-stack delivery or AI implementation?

I build SaaS platforms, MVPs, AI agents and automation systems. Based in Phoenix, AZ and open to remote and hybrid teams.

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