Dennis Haun
I build the systems behind modern products.
Full-stack applications, AI-powered software, mobile apps, APIs, cloud systems, and business automation, engineered end to end with Python, C#, .NET, TypeScript, React, Next.js, React Native, Node.js, Android, iOS, and AI/GenAI.
Selected Projects
AI Full-Stack AI-Driven E-Commerce Architecture
AI-driven eCommerce platform engineered across the full stack, combining a Next.js and React frontend with Python/FastAPI services, multiple databases, Redis caching, AI/LLM integrations, authentication, search, and cloud infrastructure.
QuickAI – Full-Stack AI Web App
Full-stack AI application for generating articles, blog titles, and images through integrated AI services. Built with a React/Vite frontend, Node.js/Express backend, PostgreSQL, authentication, Cloudinary, and multiple AI APIs.
Full-Stack Warehouse & Inventory Management System
Full-stack warehouse platform for managing products, suppliers, clients, orders, invoices, warehouses, and support operations. Includes role-based access, analytics, QR workflows, Stripe payments, Shippo shipping, and Brevo notifications.
Roastery SaaS Platform
SaaS platform for coffee roasters with multi-party payment infrastructure, seller onboarding, split transactions, platform commissions, and recurring subscription billing.
Various Service Platform
Modern service platform built with Next.js, React.js, Nuxt and Vue.js, featuring reusable components, dynamic service and location pages, lead forms, interactive maps, external integrations, SSR/SEO, and performance-focused frontend architecture.
AI Appointment & Customer-Service Automation
AI-powered customer-service and appointment automation connecting an LLM agent with Twilio, CRM systems, and workflow automation to handle appointment booking and rescheduling.
CRM Marketing Automation Platform
Python-based CRM marketing automation platform built with layered architecture and separated authentication, model, repository, and service responsibilities for maintainable business workflows.
MCP Secure AI Database Platform
GPT-powered database agent that generates, validates, and executes SQL through MCP tools with RBAC, dry-run safeguards, and full audit logging.
Engineering across the entire system.
I started in technical operations and documentation before moving into web development and progressively taking on larger application, integration, and architecture responsibilities. That path gave me a practical understanding of both software and the systems behind it, from how businesses operate to how technology can turn those processes into reliable applications.
Today, I work across the full software stack, building web and mobile applications, backend services, APIs, and cloud-based systems with Python, C#, .NET, TypeScript, React, Next.js, React Native, and Node.js. I also integrate AI/GenAI, databases, third-party services, authentication, payments, CRM platforms, and automation when they're part of the product architecture.
My work ranges from AI-powered applications and SaaS platforms to inventory systems, payment infrastructure, mobile experiences, API integrations, and intelligent automation. The common thread is end-to-end engineering: designing the architecture, building the application, connecting the services, and making sure the pieces work together as one system.
The principle is simple: good engineering starts with the problem, not the technology. AI should create real leverage, architecture should make complexity manageable, and every layer — from the interface and mobile experience to APIs, backend services, data, and cloud infrastructure — should be built to support what the product needs today and where it needs to go next.
Engineering from the whole system
A product is more than its interface. I think across frontend, mobile, backend, APIs, databases, authentication, integrations, AI, and infrastructure so the complete system works together.
AI with a purpose
AI belongs where it creates real leverage — reasoning, classification, generation, assistance, automation, or decision support — with the surrounding architecture designed to make it reliable and useful.
Architecture before complexity
Clear boundaries, appropriate abstractions, and well-defined services make complex applications easier to build, maintain, integrate, and extend as requirements evolve.
Build for what comes next
Good engineering leaves room for growth. I design systems with maintainable code, scalable data and API patterns, reusable components, and integrations that can evolve without unnecessary rewrites.
Dennis Haun
SENIOR FULL-STACK & AI ENGINEER
Tools of the trade
Full-Stack Development
End-to-end application development across modern frontend, backend, APIs, databases, and cloud services.
AI & Generative AI
AI applications, agents, and intelligent workflows engineered as part of real software systems.
Frontend
Modern interfaces and product experiences built for performance, usability, and maintainability.
Backend & APIs
Backend services, APIs, business logic, authentication, integrations, and application architecture.
Mobile Development
Cross-platform and mobile application development for connected iOS and Android experiences.
Data & Database Engineering
Reliable data architecture for applications, SaaS platforms, business systems, and AI workflows.
Cloud & Infrastructure
Production deployment, infrastructure, environments, and delivery workflows for modern applications.
APIs & Integrations
Connected application ecosystems built around APIs, third-party services, payments, communications, and automation.
Automation & Business Systems
Intelligent workflows that connect applications, data, communication tools, CRMs, and business processes.
CMS & eCommerce
Established expertise building and integrating content and commerce platforms.
Experience
Mar 2021 — Jun 2026
Senior Full-Stack & AI Engineer · Elevate Digital Studio
Full-time · West Jordan, UT, USA
- Architected and built end-to-end software across web applications, backend services, APIs, databases, cloud infrastructure, integrations, and automation using Python, C#, .NET, TypeScript, React, Next.js, and Node.js.
- Developed full-stack SaaS platforms, AI-powered applications, business systems, and connected workflows with responsibility spanning application architecture, implementation, integration, deployment, and ongoing technical improvement.
- Integrated AI/GenAI capabilities, third-party APIs, CRM platforms, payment systems, communication services, and automation workflows into production-oriented applications.
- Expanded into mobile application development with React Native, supporting connected iOS and Android experiences alongside web and backend systems.
- Progressed into senior full-stack and AI engineering as the scope of work expanded from CMS and business systems into complete application architecture, AI integration, backend engineering, and end-to-end product development.
Jun 2016 — Feb 2021
Full-Stack Developer & System Architect · Wasatch Creative Systems
Full-time · West Jordan, UT, USA
- Expanded from advanced CMS and eCommerce development into full-stack application development, system architecture, integrations, APIs, databases, and custom business systems.
- Architected and developed custom solutions connecting frontend experiences with backend logic, third-party services, CRM platforms, and business workflows.
- Built and customized WordPress, Shopify, and WooCommerce solutions while increasingly taking ownership of application structure, integrations, performance, and technical architecture.
- Translated complex business requirements into maintainable technical systems with clear application boundaries and reusable implementation patterns.
Apr 2013 — May 2016
Web & Mobile Developer · Canyon Peak Interactive
Full-time · West Jordan, UT, USA
- Built and maintained responsive web experiences while expanding into mobile application development and custom application functionality.
- Worked across frontend implementation, CMS architecture, custom development, APIs, integrations, and application workflows.
- Developed a strong foundation in responsive web and mobile development, translating business requirements into practical digital products.
- Progressively moved beyond content implementation into application development, technical integrations, and broader ownership of the systems behind the user experience.
Jan 2010 — Mar 2013
Process Documentation & Technical Operations Coordinator · MountainView Business Solutions
Full-time · West Jordan, UT, USA
- Coordinated technical operations and documented business processes.
- Worked with operational workflows and documentation, developing an early understanding of how business processes translate into repeatable systems.
- Built the process and operational foundation that later informed work in CMS, CRM, automation, and application development.
2006 — 2010
B.S. in Information Technology · Western Governors University
Education · Salt Lake City, UT, USA
- Studied Information Technology while developing a broad foundation in systems, software, and technical problem-solving.
- Research assistant contributing to data entry, archive digitization, and research support, including summer terms in 2007 and 2009.
Three ways we can work.
Full-Stack Application Engineering
I build complete software products across the frontend, backend, database, APIs, authentication, integrations, and cloud infrastructure. From SaaS platforms and internal applications to customer-facing products, the focus is on designing the system as a whole and delivering production-ready software end to end.
- Application architecture, database design, APIs, authentication, and role-based access
- React / Next.js frontends with Python, Node.js, or C# / .NET backends
- SaaS platforms, dashboards, portals, operational applications, and custom business systems
- REST APIs, third-party integrations, payments, communications, and external services
- Cloud deployment, environment configuration, documentation, and maintainable handoff
Fixed-scope project or milestone-based development, typically 4–12 weeks depending on application complexity.
AI Engineering & Intelligent Automation
I engineer practical AI systems that become part of real applications and workflows. This includes AI-powered products, agents, RAG systems, multi-agent workflows, MCP integrations, and automation designed to reason, retrieve information, generate content, and execute controlled actions.
- AI applications, AI agents, RAG pipelines, and multi-agent workflows
- LLM integrations with OpenAI, Claude, Gemini, Groq, and other model providers
- LangGraph, LangChain, MCP, tool-calling, and structured AI workflows
- AI connected to APIs, databases, CRMs, communication systems, and business applications
- n8n, Zapier, Make, Twilio, and custom workflow automation
- Validation, permissions, human-in-the-loop controls, logging, and secure server-side execution
Fixed-scope AI sprint or staged implementation, typically 2–8 weeks depending on model integration and workflow complexity.
Web, Mobile & Systems Integration
I connect applications across web, mobile, backend services, APIs, cloud infrastructure, and external platforms. The result is a cohesive technical system rather than a collection of disconnected applications.
- React Native applications for iOS and Android with connected backend services
- Backend APIs and services using Python, Node.js, C#, and .NET
- API architecture, webhooks, authentication, data synchronization, and third-party integrations
- Cloud infrastructure, Docker, CI/CD, deployment, and production environments
- CRM, CMS, eCommerce, payment, shipping, communication, and automation integrations
- Legacy application modernization, system integration, and architecture improvements
Fixed-scope integration or architecture project, typically 2–8 weeks depending on system complexity and integration requirements.
Contact
Have a product in mind?
Let's build it.
From AI-powered applications and SaaS platforms to mobile apps, APIs, backend systems, and cloud infrastructure, I build software across the full stack.
Tell me what you're trying to build, improve, or solve.
Direct lines
MT (UTC-7:00)Email is best — I read every message myself.