Full Stack Product Engineer (Node.js / React)

📍 Full Stack Product Engineer at AI Advantage / Mastermind.comLocation: Scottsdale / Greater Phoenix, on-site preferred (open to US remote for strong candidates)Work Structure: Full-time, W2Compensation: $105,000 - $120,000 depending on experience, plus benefitsEligibility: 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 our stack, not adjacent ones (Java, .NET, or Python-primary backends are not a fit).---✅ What This Role IsThis is a hands-on, mid-level full stack seat, not a lead role. Our team has rebuilt the platform on a clean, modern stack, so you inherit ownership, not years of tech debt.We're looking for five or more years owning both a production backend and the front end that consumes it; total career length neither qualifies nor disqualifies.You will own your work end to end on a lean senior team that ships in two-week sprints.Roughly 70% backend and systems, 30% front-end, with full code ownership.You will be building the tooling that keeps a large education platform running for real customersThis is tooling and integration work with real leverage, not ticket-shuffling.This a pure build seat, pointed where it creates the most value.We are looking for an engineer who is organized and autonomous, ships clean through peer review, and genuinely rolls with change when priorities pivot fast.❌ What This Role Is NotNot 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.If You Can...Build a unified admin panel that lets a non-technical customer team fix accounts end to end in one clickOwn the plumbing that carries the whole company from point of sale into CircleMove work from to-do to done with clean hygiene and no one chasing youOwn your own QA and ship through peer-reviewed pull requests, never work thrown over a wallSay "I don't think this is fully thought through, let's talk it through" before you write a line of codeSet down yesterday's work for today's when priorities shift, without getting precious about it...then we want to talk to you.✅ What You'll OwnCustomer 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 ForRequirements4 to 6 years building production full stack applications inside a professional engineering team with code reviewFront-end: Next.js, React, TypeScript, Tailwind, iframesBackend: Node, Express, MySQL, RedisCloud and hosting: Heroku and GCPCollaborative problem solving: you think fast with the team and pressure-test the plan before building, no rogue playersReal AI fluency: you use AI as a craftsman's tool and make sure what it produces actually worksUS citizens and green card holders only. No visa sponsorship.Strong DifferentiatorsAI coding tools used well (Claude Code, Cursor), with the judgment to verify and own the outputn8n or workflow automation experienceBased in Scottsdale or Greater Phoenix (on-site preferred)1 to 2 prior roles of roughly two years each, ownership. No job hoppingThe Core Skill: Change ResiliencePriorities 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.💻 How to ApplyApply through the application link in this post. You will be asked focused questions about your experience, how you use AI tools in your workflow, and how you think about shipping clean, reviewable work on a fast-moving team.Example: one question will ask you to describe the toughest technical problem you solved recently, what made it hard, and how you worked through it.We personally review every submission. No auto-rejections. If your application moves forward, you will hear from us within a few business days.