Mattie Langenberg

Product Engineer | Product, Design & Full-Stack Architecture

Cross-disciplinary builder and technical leader with 15+ years of experience taking digital platforms from greenfield concept to production scale.

Mattie Langenberg headshot

About Me

I love operating at the intersection of Product (value scoping, discovery prototyping), Design (scalable design systems, UI/UX fidelity), and Engineering (Next.js/React full-stack architecture, cloud infrastructure).

I've spent most of my career working as a key contributor to ship features end-to-end, creating reusable architectural building blocks, and more recently leveraging AI-augmented workflows to accelerate velocity, while adapting traditional project management processes to agentic supported workflows.

Experience

Director, Product, Design & Engineering / Principal UX/UI Engineer

Jan 2024 - Present

KlearTrust

Architecture & AI Engineering
  • Translate high-level product vision into AI-optimized technical specifications and rapid discovery prototypes
  • Architect and implement full-stack Next.js cloud solutions on AWS (Cognito, PostgreSQL, Lambda, CloudWatch)
  • Integrate agentic AI tooling (Antigravity with VS Code, Claude Code, GitHub Copilot) into development workflows to cut delivery cycle times
Autonomous Workflows & Systems
  • Deploy internal AI agents to automate administrative overhead, developer task breakdown, and release documentation
  • Engineer scalable component libraries, UI architecture, and design systems across enterprise products
  • Construct automated CI/CD quality pipelines (GitHub Actions, ESLint, TypeScript) and test suites (Vitest, Playwright)

Lead User Experience Engineer

Apr 2021 - Dec 2023

The Office of Experience

  • Led front-end architecture for React and Vue.js applications paired with Headless CMS backends (Storyblok, Contentful)
  • Established automated UI component validation and visual regression testing with Storybook, Jest, and Playwright
  • Managed and configured AWS and Azure cloud infrastructure for scalable web applications and microservices

Lead Front-End Developer (Founding Engineer)

Oct 2020 - Apr 2021

rheli.co, Inc.

  • Delivered 0-to-1 greenfield front-end architecture and component libraries using React.js for early startup venture
  • Architected custom Markdown modules and dynamic rendering engine for complex content layouts
  • Constructed GitHub Actions CI/CD pipelines across tiered Netlify environments to accelerate build-measure-learn loops

Lead Front End Developer

Aug 2017 - Oct 2020

Apervita, Inc.

  • Executed architectural migration of healthcare analytics platform UI from legacy Backbone.js to component-driven React
  • Engineered high-throughput data visualizations and interactive dashboards for complex healthcare analytics
  • Architected modular design component system and UI foundation for high-density, data-intensive workflows

Group Technical Director

Jan 2017 - Aug 2017

Critical Mass

  • Led technology practice at Critical Mass Chicago office
  • Managed projects, staff, and 3rd party vendors
  • Solution architecture for enterprise projects and social campaigns

Associate Partner/Director of UI Development

Jan 2000 - Nov 2012

VSA Partners

  • Championed development processes and practices across organization
  • Led architecture and production of all VSA digital work
  • Staffed and mentored team of thirteen full-time developers
  • Bridged creative team, clients, and IT partners

Skills & Expertise

Engineering Core

React, Next.js, TypeScript, Node.js, JavaScript (ES6+), PostgreSQL, REST & Socket APIs.

Leverage & Automation

Agentic AI workflows (Antigravity with VS Code, Claude Code, GitHub Copilot), CI/CD automation (GitHub Actions), Docker.

Product & Design Abstractions

Discovery track prototyping, UI architecture, Design Systems, Component-Driven Development, Storybook, Figma, Wireframing.

Get in Touch

Interested in discussing UX/UI architecture, design systems, or potential collaboration? Let's connect.

GitHub Activity

GitHub Contribution Graph for kt-mattie-langenberg

Experiments

Self indulgent mini projects. These are small development, design and prototyping projects I'm using to get to know tooling in concert with Figma, off the shelf design systems, extensions and MCP to compare results and refine my personal workflow.

Pace Calculator

A running pace calculator to help runners plan their training and race strategies. Calculate splits, pace, and speeds with variable split timing and distance configuration.

View Project

Concert Calendar

A dynamic concert calendar that pulls from ICS feeds to display upcoming shows. Share your plans with friends.

Git Rules

A collection of chatmode rules for maintaining consistent commit messages, pull request descriptions, and production release notes. These chatmodes work together to create a workflow where good commits lead to good pull requests, which in turn serve as context for generating release notes with historical links and summaries.

View Repository