Matt Stvartak
Founder, OneNomad LLC · Senior Software Engineer
I'm Matt. I've spent the last 15 years shipping software — most recently as a Senior Engineer at General Motors' motorsports analytics group, and before that at Synchrony, Earnest, Banjo Health, and Red Ventures. I've led teams, architected systems from scratch, and written more React than I'd like to admit.
In 2026 I started OneNomad as an independent software studio to build the AI runtime and cognitive layer I wished existed — Pyre, Engram, Persona, and Cortex. That's OneNomad's core focus today. Alongside the AI platform I've also shipped a handful of vertical SaaS and consumer products on the side — listed below — that solve specific problems and keep the studio's shipping muscle exercised.
I care about craft, accessibility, and tools that actually solve problems. Most of my work is end-to-end: design, frontend, backend, infrastructure, and the business decisions that hold them together.
Side projects, all in production
Vertical SaaS and consumer products I've shipped while building the OneNomad AI platform. Each one solves a specific problem, has a real monetization path, and is live for paying users today.
Thyme to Plan
A meal-planning and nutrition app that bridges your recipes, pantry, and a 3M-food database. Web and native mobile share one Payload backend, so a meal logged on a phone updates your weekly plan, grocery list, and macros instantly.
Most calorie trackers ignore the kitchen. Recipes live in one app, the grocery run in another, and the pantry’s on a sticky note. By dinner, half the produce is wilted and you’re ordering takeout.
Built a unified plan → shop → pantry → log loop with a multi-tier ingredient search that falls through from local cache to FatSecret. Pre-scaled nutrition stays consistent across every surface; the Expo mobile app shares the same Payload + PostgreSQL backend so changes on either side sync in seconds.
Dungeon Diary
An AI-powered campaign management platform for Dungeon Masters. Built for the full lifecycle of a D&D campaign: from world building and NPC generation to session tracking and encounter management.
DMs spend hours prepping campaigns across scattered notes, spreadsheets, and documents. Between sessions, story details get lost and prep time eats into the fun.
Purpose-built campaign hub with AI generation for NPCs, locations, quests, encounters, loot, and regions. Includes interactive character sheets, integrated dice rolling, combat tracking, a world building wiki, and AI portrait generation, all organized around your active campaign.
FieldLedgr
Mobile-first quote-to-cash platform for trades businesses. Estimates, e-signatures, invoicing, payments, and automated follow-ups, all in one place.
Trades workers juggle paper quotes, separate invoicing apps, and manual payment chasing. Most existing tools are desktop-first and overly complex.
Built a mobile-first flow from quote to payment using Payload CMS for the backend, Stripe Connect for payments, and Cloudflare Workers for edge performance.
SnapTab
A bill-splitting mobile app that scans receipts with AI and splits the tab between people. Generates QR-coded payment requests for Venmo, Cash App, and PayPal so nobody has to do math at the table.
Splitting a group bill means squinting at a receipt, doing math on a napkin, and then chasing four people for $14 each. Existing splitters make you type every line by hand.
Native receipt scanning with VisionKit/ML Kit, line-item parsing through Gemini 2.0 Flash via OpenRouter, per-person assignment, and one-tap payment requests with QR codes plus SMS deep links. Built in React Native + Expo, shipped to both App Store and Play Store.
Game Night
A two-sided marketplace for tabletop gaming events. Venues get a full event management platform with ticketing, ticket scanning, and payment processing. Players use a Google Maps-based discovery tool to find local game nights filtered by event type, venue type, price, and distance.
Game shops and venues manage events across Facebook, Eventbrite, and spreadsheets. Players have no dedicated way to find local tabletop gaming events near them.
Built a venue partner dashboard with full ticketing and payment infrastructure, a Google Maps event discovery layer with category and distance filters, and a claimable venue page system for bootstrapping the marketplace.
Working with me
OneNomad is my full-time focus. Outside of OneNomad I take a small number of advisory engagements and consulting projects — usually around AI infrastructure, early-stage product architecture, or design-engineering reviews. If that fits what you're working on, reach out at hello@mattstvartak.com.