What I build
Product & platform
The product around the AI: auth, payments, dashboards, and the boring-but-critical parts done right — production-grade, not prototype-grade.
Web apps & customer portals
Authentication, payments, dashboards — the real thing, on Next.js + Supabase or your stack.
Internal tools & admin panels
The ops dashboard or back-office tool your team runs by hand in a fragile spreadsheet.
APIs & backends
REST or typed APIs with validation, auth, rate limiting, and tests — a service layer you can build on.
Dashboards & data viz
Institutional-grade visualization treated as part of the design system, not an afterthought.
#How I approach a build
- Boring where it counts. Auth, payments, and data integrity use proven patterns and libraries, not clever code you’ll have to maintain.
- Typed and validated at the edges. Every input is schema-checked at the boundary, so bad data fails fast with a clear error instead of corrupting state.
- Tested as it’s built. The critical paths get a Playwright suite and CI from day one — see Test automation & CI.
- Yours at handoff. Your repo, your infra, a runbook, and a walkthrough — never a black box only I can run.
#The stack, where it matters
I’m stack-flexible, but this is the default I reach for when there’s no constraint — chosen for speed to production and low maintenance:
Frontend Next.js (App Router) · React · TypeScript
Backend Serverless functions · typed APIs · Zod validation
Data Supabase / Postgres · row-level security
Payments Stripe
Quality Playwright + axe in CI · self-hosted fonts · strict CSP
Automation n8n / Make / LangGraph where a workflow fits▸
This site itself is an example: static + serverless, self-hosted fonts, a strict CSP, and its own Playwright + axe suite (100+ checks) gating every deploy — see the case studies.
Need the app, not just the AI?
Book a call and we’ll scope it.
© 2026 Jason Teixeira · Sage Ideas LLC · Documentation home