Kelly Michels

• Scale. Nearly 100,000 lines of Python behind 122 pages in NiceGUI, on PostgreSQL with SQLAlchemy and 129 Alembic migrations, and 6,428 PyTest tests. Its workflows and features come from real EHS professionals; all of the UX is mine.
• What it covers. Environmental permits discovered from EPA and state sources and tracked to expiry; OSHA-aligned incident reporting and management, the OSHA 300 log and 301 export, and incidence rates; CAPA; chemical inventory; training matrices; a compliance score, calendar and reports; audit readiness and audit binders; recurring tasks; Ask AI over each site's own records; and a global-admin console across every tenant.
• Self-serve onboarding. A three-step public signup at evoehs.com/register: the workspace and its own subdomain, checked for availability; the admin account; the plan, with labels and prices read from one catalogue so the screen cannot advertise a price Stripe does not charge. No card at signup; a single-use verification link, with re-send throttled by IP and silent about whether the address exists.
• Subscription billing on Stripe. Checkout in subscription mode with a 14-day trial, card or US bank debit. Signature-verified, idempotent webhooks drive a tenant state machine: TRIALING, ACTIVE, PAST_DUE, SUSPENDED. Card changes and cancellations go through the Stripe Billing Portal and back through the webhook, so the page is role-gated on the server.
• The APIs and data behind it. EPA ECHO, TRI and GHGRP; 40+ state environmental agencies, deepest in Texas (TCEQ) and Minnesota (MPCA); NWS and Open-Meteo weather; Stripe billing; Brevo SMS; and evo.ai for questions in plain language.

• One NestJS 12, Prisma and PostgreSQL service that owns tenants, users, authentication (JWT verified locally against JWKS, passkeys), roles, invites, Stripe billing, email and audit logging for several apps. I designed its API and wrote its Node and Python SDKs, a Next.js/React starter template and an evo new scaffold CLI. Source: github.com/evomedia-net.
• Serving ProvenSheet, CivilCode and DocketMail today, and Ask AI: evo.ai verifies every caller's platform-issued JWT, so a tenant reaches only its own data. The sharpest defect found there: a unique constraint on (tenant, email) that protected every ordinary user and no platform admin, because SQL treats NULLs as distinct. The rule since: NULL means absent, never a kind.

• The multi-tenant RAG (retrieval-augmented generation) service three of the products answer questions with, citing their sources, with per-user chat memory. FastAPI, LlamaIndex, Qdrant, LiteLLM. Runs online today and supports a fully air-gapped, on-site install with Ollama, so a customer's data never has to leave their servers. Answers cut from about twelve seconds to about three.
• Release-gated by evo.ragframework: a judged corpus of 114 questions, deterministic checks plus an LLM judge, compared run against run; all 114 pass. Self-hosted Langfuse traces every question end to end over OpenTelemetry.

• evomedia.net: hand-written HTML, CSS and JavaScript built with Vite; responsive, with tests for its mobile layout; self-hosted fonts and self-hosted Umami analytics.
• ProvenSheet: turns the Excel workbook a business runs on into a shared, multi-user web app and proves every formula still computes what Excel computed. Next.js 16, React 19, Tailwind, Prisma, TypeScript.
• DocketMail: Harris County civil case search for family law, on the District Clerk's public civil-case data API and the USPS Addresses API. React 19, Vite and TypeScript over FastAPI and SQLAlchemy.
• CivilCode: ask-and-cite search over the Texas statutes, cited to the section with an as-of date. Next.js 16 and React 19 over a second evo.ai instance.
• evo.polaris, open source: an offline-first polar-alignment app for star trackers, validated against NOAA and Hipparcos data. evo.ablecamera, next to be open source: Canon camera control driven entirely by keyboard, switch, voice or dwell input.

ProvenSheet, DocketMail and CivilCode are early-stage working prototypes.