Full Stack Engineer

Mastermind.com; Phoenix (AZ); On-site; USD 110,000 - 150,000; Full time

Job summary

Mastermind.com in Scottsdale/Greater Phoenix is seeking a hands-on Full Stack Developer to join a small senior engineering team. You will own our customer service admin suite, the Circle member experience tooling, and the affiliate system, delivering end-to-end features in two-week sprints.

Required: 4–6 years of production full-stack experience in a modern JS stack (Node/Express, React/Next.js, TS, Tailwind), US work authorization, on-site preference.

Qualifications

• 4 to 6 years building production full-stack applications.
• Front-end stack: Next.js, React, TypeScript, Tailwind.
• Cloud hosting: Heroku and GCP.
• US citizens and green card holders only.

Responsibilities

• Own Customer Service Admin Suite end-to-end.
• Manage Circle member experience tooling.
• Maintain and improve the affiliate system.
• Ship features every sprint with peer review.
• Own QA and production deployment.

Skills

Full stack development

Next.js

React

TypeScript

Tailwind

Node.js

Express

MySQL

US work authorization

Tools

Heroku

GCP

Job description

Full Stack Developer at Mastermind.com

Location

Scottsdale / Greater Phoenix, on-site preferred (open to US remote for strong candidates)

Work Structure

Full-time, W2

Eligibility

This role requires US work authorization without sponsorship, now or in the future (US citizens and green card holders).

Tech Stack

Our stack is Node.js and Express with MySQL on the backend, and React, Next.js, TypeScript, and Tailwind on the frontend.

We are looking for engineers whose recent production work is in this stack, not adjacent ones (Java, .NET, or Python-primary backends are not a fit).

----

Mastermind.com, built in partnership by Tony Robbins and Dean Graziosi, is the number one online platform for people who want to market and monetize their knowledge. We are an all-in-one ecosystem for education, entertainment, implementation, and community, serving entrepreneurs worldwide who are committed to growth, clarity, and results.

Behind that platform is a small, senior engineering team that builds the tooling members and our customer team rely on every day: the admin suite that solves almost anything in one click, the member experience, and the affiliate system that drives growth. Small but mighty, with real ownership.

What This Role Is

This is a hands-on, mid-level full stack seat (4 to 6 years), not a lead role. Roughly 70% backend and systems, 30% front-end. You own your work end to end on a lean senior team that ships in two-week sprints. The team recently rebuilt the platform on a clean, modern stack, so you inherit ownership, not years of tech debt.

You will build the tooling that keeps a large education platform running for real customers: the customer service admin suite that fixes accounts in one click, the Circle member experience members touch every day, and the affiliate system that drives growth. This is tooling and integration work with real leverage, not ticket-shuffling.

The person who fits is organized and autonomous, asks why before building, ships clean through peer review, and genuinely rolls with change when priorities pivot fast. This a pure build seat, pointed where it creates the most value.

What This Role Is Not

• Not a lead or management seat. You architect and ship, not run a team or defend a roadmap in meetings.
• Not a DevOps or platform-ops seat. No pagers, no babysitting deploys, so you spend your time building instead of firefighting.
• Not a solo builder's gig. If your entire background is personal projects with no professional team or code review, this is not a fit.
• Not an "AI writes it, I ship it" role. We want engineers who make sure what AI gives them actually works, not people who hand it off unchecked.
• Build a unified admin panel that lets a non-technical customer team fix accounts end to end in one click
• Own the plumbing that carries the whole company from point of sale into Circle
• Move work from to-do to done with clean hygiene and no one chasing you
• Own your own QA and ship through peer-reviewed pull requests, never work thrown over a wall
• Say "I don't think this is fully thought through, let's talk it through" before you write a line of code
• Set down yesterday's work for today's when priorities shift, without getting precious about it

...then we want to talk to you.

Why This Role

Most full stack roles bury you in the parts of the job nobody planned for: legacy sprawl, undocumented systems, and infrastructure that fights you before you write a line of product code.

That's not this.

Our team just retired an entire legacy stack and rebuilt the platform on a lean, modern foundation with zero customer disruption. There is no decade of tech debt waiting for you, no tangle to reverse-engineer before you can ship. The stack is current, the team is senior, and the path from your branch to production is short: you own your work end to end, ship through peer review, and see it go live without wading through layers of process.

What you get to do with all of that is build. Real tooling, real ownership, and a small team where what you ship actually matters. If you have ever wanted to do your best engineering work without fighting for the conditions that make it possible, this is that role.

What You'll Own

Customer Service Admin Suite (Primary)

• The unified admin panel that lets Customer Service take a client end to end: one-click account, billing, and login fixes across one tool instead of five.
• This is the highest-leverage surface you will build, and what it can do keeps expanding.

Member Experience (Ongoing)

• The Circle member experience (login, billing, account management, lead flows) and the plumbing that connects our commerce stack to it, running smoothly end to end.

Affiliate System (Ongoing)

• Maintain, extend, and improve the affiliate system that drives growth.

How You Ship (Every Sprint)

• Own your work all the way to production: validate it yourself, walk a reviewer through your test cases, and ship through peer review.
• Keep clean progress and surface blockers early.

What We're Looking For

Requirements

• 4 to 6 years building production full stack applications inside a professional engineering team with code review
• Front-end: Next.js, React, TypeScript, Tailwind, iframes
• Cloud and hosting: Heroku and GCP
• Collaborative problem solving: you think fast with the team and pressure-test the plan before building, no rogue players
• Real AI fluency: you use AI as a craftsman's tool and make sure what it produces actually works
• US citizens and green card holders only. No visa sponsorship.

Strong Differentiators

• AI coding tools used well (Claude Code, Cursor), with the judgment to verify and own the output
• n8n or workflow automation experience
• Based in Scottsdale or Greater Phoenix (on-site preferred)
• 1 to 2 prior roles of roughly two years each, ownership. No job hopping

The Core Skill: Change Resilience

• Priorities here can pivot fast, and sometimes weeks of work get shelved the same day. Everyone says they are fine with that. Almost nobody is.
• The engineers who thrive treat a scrapped project as a redirect, not a loss. If that is genuinely how you are wired, you will do your best work here.