Work With Me
PLG strategy, experimentation programs, activation design and AI prototyping for SaaS and FinTech teams.
I'm John Stewart. I run growth experimentation at Rate.com, where the programs I've built operate across $2B+ in annual mortgage origination volume — high-intent funnels, verification-gated activation, and testing under real regulatory constraints. Before that, fifteen years scaling B2B SaaS growth. The work here is the same work: find where activation actually breaks, build the cadence that fixes it, and leave the team able to run it without me. Read more about my background.
PLG Strategy Sprint
2–4 weeks
An activation audit against your funnel data, an experimentation roadmap ranked by expected impact, and a metric framework your team can run without me.
- Empirical activation definition from retained vs churned cohorts
- Channel-segmented funnel teardown
- Prioritised experiment backlog and metric framework
Experimentation Program Build
Ongoing
A working weekly cadence: hypothesis pipeline, test design with real power calculations, and results analysis that survives scrutiny.
- Hypothesis intake and prioritisation model
- Test design, sizing and guardrail metrics
- Readouts, decision log and confidence calibration
AI Prototyping
48–72 hours
Concept to a working, deployed, instrumented demo — real data and logic, not a clickable mockup.
- Calculators, onboarding flows, qualification tools, dashboards
- Analytics on the critical events from day one
- Findings memo on where users actually stall
Tell me what you're working on
Prefer a call?
A 30-minute intro call is usually enough to tell whether there's a fit and where the leverage is.
Book a 30-minute intro