615io

615io is a software consultancy in Nashville, Tennessee, operating since 2013. It works as a fractional CTO and solutions architect, building a small prototype of the most uncertain part of a product on the client's real data before any full build is funded. Founder Matthew Wallace writes the code himself.

What 615io offers

• Prototype-first builds — naming the riskiest assumption and building the least software needed to prove or disprove it.
• Fractional CTO support — senior technical judgement for companies deciding whether and how to build.
• Solutions architecture — work on agent loops, data joins and headset interactions, among other risky components.
• Immersive experiences — earlier projects in augmented and virtual reality, such as a VR heart explorer and AR training.
• Roadmap handover — after a prototype, clients can continue with 615io, pass the plan to their own team, or stop.

Who it works with

Past work includes an augmented reality training tool for Bridgestone's commercial tyre group and a VR tool for studying CT scans of hearts, made with Vanderbilt Children's Hospital and Paradym Studio. Clients keep ownership of everything built.

Key facts

• Based in: Nashville, Tennessee
• Founded: 2013
• Founder: Matthew Wallace, shipping interactive software since 2004
• Technologies: Unity, Unreal, WebXR, HTML and JavaScript, agentic systems