Happy STL · St. Louis Area Software Studio
Hard Data Problems, Turned Into Software You Can See
We take large, messy or fast-moving data and build what you need around it: the pipelines and data models, the analysis, and the dashboards, simulations and live views that make it clear. We build it to run where you need it, in the cloud, on your own servers, on phones or at the edge, and bring experience from Wall Street trading systems, Roblox and cybersecurity, for a small business or a large one.
The call is a 30-minute introduction on video, wherever you are, to see whether we’re the right fit. The planning itself is Discovery, a small paid first step.
- Machine LearningForecasts and models, measured against a plain baseline.
- Optimization & Quantum ComputingExact solvers and quantum computing for the hardest scheduling and routing problems.
- Applied ResearchMeasure first, then build on what the evidence shows.
- AI Agents & ModelsAgents and assistants that take real work off your plate, built with Foundry, our own AI engineering platform.
- Websites & Web AppsFast, accessible sites, stores and dashboards, built to last.
- Apps for Every DevicePhones, tablets, Windows, Mac and Linux, even offline.
- Cloud & InfrastructureAWS, Google Cloud, Azure, smaller cloud and hosting providers, or your own servers: scripted setup, staging before production, backups checked.
Who We Work With
Small Businesses and Large Ones
Proof of Craft
Built by Us, Playable Now
Each game is a data problem made visible: an exact solver searching every position, a physics simulation, a live renderer. We build business tools the same way.
- 21 daysof work from the first draft of The Island of Crete to its 100-level release
- 4,000+automated tests guarding our games and sites
- 4,600puzzle levels, 100 in the story and 4,500 in Endless, every one solved exactly by our own solver
How We WorkA plan you approve → built and reviewed by our AI-agent studio → tried on staging → shipped to production on your schedule.
FoundryOur own AI engineering platform, built in-house. It is why a small studio ships like a large one: more than 1,400 changes merged across our games, sites and tools since June 2026, each one tested and reviewed.
Where We’ve WorkedWall Street, video games, cybersecurity, academia, insurance, health & fitness, privacy & email and education technology. Before opening Happy STL, our founder was Director of Engineering at Signal Mine, a St. Louis AI and data company, working in AI, data science and quantum computing.
What to ExpectA free introductory call → Discovery, a small paid engagement where we plan the work → a price agreed before we build, never an hourly bill.
Book a Free 30-Minute Introductory Call
Tell us what you want built on the booking form. The call is an introduction: we learn what you need, and you learn how we work.