Available for new projects · Q2 2026

Full-stack SaaS
for founders
who ship.

I build complete web products with Next.js, Supabase, and Stripe — from auth and payments to AI-powered features. I'm the developer behind Crisler.Fit, a production coaching platform I built and run myself.

20+
Years coaching
500+
Athletes trained
1
Production SaaS
0
Retainer slots taken
§ 01 — Selected Work

Shipped. Running.
Paying rent.

Every project below is live in production on Crisler.Fit — built, deployed, and maintained by me.

01Booking & Payments

Consultation booking with Zoom automation

The problem

A coaching business needed to sell $99 consultation calls that automatically created Zoom meetings, handled timezone conversion for clients across the country, and enforced 15-minute expiration windows on post-call discount coupons.

What I built

A full booking system on Next.js + Supabase with Stripe Checkout, automatic Zoom meeting creation via the Zoom API, timezone-aware slot availability, and a Resend-powered email sequence that delivers calendar invites, prep materials, and time-limited discount codes.

Fully automated booking-to-call pipeline. Zero manual admin.

Next.js 14SupabaseStripeZoom APIResend
02Revenue Mechanics

Time-expiring Stripe coupon system

The problem

Consultation buyers needed a personalized discount code that unlocked a higher-tier coaching subscription — but the discount had to expire 15 minutes after their call ended to create real urgency, and each code had to be unique and single-use.

What I built

A coupon generator that creates a unique CALL-XXXXXX code per consultation, ties it to the user's Supabase record, enforces the post-call expiration window via Stripe metadata and server-side validation, and handles edge cases like timezone mismatches and late-starting calls.

A pricing concept turned into a revenue-generating funnel mechanic.

Next.js 14SupabaseStripeServer Actions
03AI & Automation

AI intake funnel + autonomous dev agent

The problem

Lead qualification at scale is expensive. I wanted a quiz-based intake that personalizes a sales page per prospect, captures leads even when they don't convert, and lets me ship code changes remotely — from a phone, from anywhere.

What I built

A multi-step quiz funnel captures goal, challenge, and experience into a Supabase opt_leads table, then generates a personalized consult page via URL params. On top of that: an autonomous Python agent with a web UI that connects to the GitHub repo and lets me manage the codebase from a phone.

Every visitor becomes a tracked lead. I ship code from a coffee shop.

Next.js 14SupabasePythonGitHub APIOpenAI
§ 02 — About

Precision is a habit,
not a skill.

I'm Jon Crisler. Before becoming a developer, I spent twenty years as a Junior Olympic gymnast and two decades coaching athletes — the kind of work where a half-degree angle decides whether you land on your feet or your face.

I build software the same way. Tight scope. Clean execution. Shipped.

My own SaaS — Crisler.Fit — is my working portfolio: auth, payments, video, booking, automated email flows, AI agents. Every case study on this page is something I built, deployed, and still run in production.

Working with founders who want a developer who understands the business, not just the tech stack.

§ 03 — How we work together

Three ways in.
One standard.

A
from $8,000
4–6 weeks

MVP Build

You have an idea and need it shipped. I scope, build, and deploy a complete working product — auth, payments, the works.

  • Full product build, end to end
  • Fixed price, fixed timeline
  • Launch-ready on day one
Most booked
B
from $3,500
2 weeks

Feature Sprint

You have an existing product and need a specific feature or integration built right — payments, AI, third-party API work.

  • Scoped to a single outcome
  • Clean code, clean handoff
  • Zero drag on your team
C
from $3,500
per month

Retainer

Ongoing development and new features on a committed monthly schedule. For founders who want a dev on call, not on payroll.

  • Committed hours each week
  • Direct Slack / email access
  • Priority on new features

Every engagement includes direct Slack / email access, weekly check-ins, and clean handoff documentation. Fixed prices, no surprise invoices.

§ 04 — Start a project

Got something
worth building?

Email
jon@crisler.dev
Or book a 20-min intro call
Book time