Daniel Kaspo

The Edgeguard keyboard-to-controller adapter

• Designed, built, and sell the Edgeguard, an adapter that lets players use a keyboard as a Nintendo Switch controller. On sale in beta since early 2023.
• Designed the PCB in KiCad around an FT900-series microcontroller, chosen because it can act as a USB host and a USB device at once. Worked with manufacturers on custom enclosures and cables.
• Wrote the USB firmware in C, including a HID layer that reads each keyboard’s report descriptor and parses its reports, keeping n-key rollover where the simpler boot protocol gives it up. Integrated a collaborator’s key-mapping engine.
• Built the browser configurator with JavaScript, React and WebUSB, and a WebAssembly layout encoder with a collaborator. It checks each adapter’s firmware version and capacity before sending a layout.
• In 2026, used Claude to find the root causes of firmware problems with USB hubs and 8,000 Hz keyboards.
• Built a USB latency probe with AI’s help and measured the adapter’s own processing at about 48 microseconds.

Client product teams and embedded delivery

• Bedrock Detroit: The only web developer on the client’s marketing team of about 15, and for a long stretch the only person there from Detroit Labs. Integrated Contentful with React components and became the client’s go-to for technical questions. Compared four CMS platforms and recommended Webflow.
• Driveway: In a pod of 4 to 6 on the financing section of a multi-team vehicle-purchase flow: worked on the financing flow, implemented an animator’s checkout motion with Lottie, and built MJML email templates.
• Quicken Loans · Rocket Professional: Worked on a web app with client and loan workflows and mortgage rate sheets. Before launch, built cookie-based access so the client could test production behind its Coming Soon page, and researched a high-priority logout problem so the team could give the client options and estimates quickly.
• Lineage MetricsOne: On a team of 10 to 14, built interfaces for a cold-storage operations dashboard covering facility performance, product locations and time in storage.
• Prototypes: Wrote a scheduling calendar from scratch for a prospective Delta engagement, and built an animated data-visualization concept for another pitch.
• Mentoring, hiring and estimating: Mentored four to six newer developers, interns among them, through pair programming. Onboarded new teammates, led a junior developer on two-person projects, ran technical interviews, and frequently estimated task lists for prospective clients.
• Review and delivery: Recorded video walkthroughs and wrote explicit testing steps for pull requests. Helped manage Jenkins and configure CI/CD jobs.

• Worked on Copy.com and CudaDrive, consumer and enterprise cloud-storage products; contributed to CudaDrive’s web application using Backbone.js.
• After those products were discontinued, moved to Barracuda Cloud Control and worked on its dashboard using React and ES6 JavaScript.

• Contributed to the next major version of MyEtherWallet’s frontend.

• As the church’s main web developer, rebuilt its fixed-width PHP website on the Arena church CMS with a responsive design using Foundation, working with the graphics team.
• Created CMS modules in C#/.NET.
• On my own initiative, built a giving kiosk from a leader’s idea: a JavaScript app that loads gift cards through a USB card reader. The kiosks were on the church’s main floor for the Christmas giving season.

• Designed SQL Server Reporting Services (SSRS) reports and worked on website compatibility issues.

A free, open-source video compressor for Windows, made with Claude in an hour or two. I decided what it should do and pushed back on weak defaults. Its quality setting was chosen by VMAF scoring. Project story.

Converted a running treadmill for use under a desk, with a Raspberry Pi Zero W, a Node.js and Express API, Google Assistant voice control, and a web interface. Project story.

Built a responsive signup website and Node.js provisioning service that created and hosted Ghost instances, with subscription payments. The service is now retired. Project story.