Calvert Labs

Custom software for small businesses.

I build web platforms, integrations, and infrastructure — so you can stop duct-taping SaaS tools together and own something that actually fits.

Get in touch
Zach Calvert

What I do

  • Platform development Full-stack web applications built to replace off-the-shelf tools — member portals, admin panels, directories, and more.
  • Subscription & billing Stripe-powered billing systems with membership tiers, invoicing, and lifecycle management.
  • Integrations Connecting your platform to the tools you already use: HubSpot, QuickBooks, Resend, and others.
  • Cloud hosting & infrastructure Deployment on Fly.io with ongoing maintenance, monitoring, and managed hosting at a reasonable scale.
  • Domain & DNS management End-to-end help with domain registration, configuration, and transfers.

Work

Xcelerate Women xceleratewomen.app ↗

Replaced a Webflow + Memberstack setup with a fully custom member platform — handling onboarding, profiles, a business directory, subscription billing, a newsletter archive, and automated syncing with HubSpot and QuickBooks. Deployed on Fly.io for around $17/month.

  • Django
  • Next.js
  • Stripe
  • HubSpot
  • QuickBooks
  • HTMX
  • Fly.io
Xcelerate Women member dashboard Business insights dashboard — membership, MRR, conversion
Celery debug dashboard with live HTMX updates Newsletter archive admin built with React Admin

A RAG-powered chatbot with a ten-year memory — trained on the history of a private fantasy football league. Supports multiple "voices" that answer in the style of individual league members, or a blended group persona.

  • Python
  • RAG
  • LLM
  • Django
  • Fly.io
BBR Chat — RAG chatbot with group voice blending
EPL Bets eplbets.net ↗

A real-time English Premier League prediction game with live match odds, parlay slips, a leaderboard, and live standings. Built as a personal project and demo of real-time web app capabilities.

  • Django
  • React
  • WebSockets
  • Fly.io
EPL Bets odds board with parlay slip
EPL Bets matchday dashboard

Let's talk

I take on a small number of projects at a time. If you have something in mind, reach out.

zach@calvertlabs.io

github.com/zachcalvert ↗

Moira Rose Moira Rose, Chief Morale Officer

She pays for Claude Max so you don't have to.