The Mission

Money is where patient care gets complicated. A titration upgrade, a renewal, a plan change — every one of them has to resolve into the right charge, the right credit, the right event, every time, or a patient's medication doesn't ship. Your mission is to own that correctness end to end: from the payments service and subscription/renewal logic through the checkout and account screens patients actually see. You're not choosing between backend and frontend — you're closing the loop between them, because in payments the two are the same problem.

What You'll Actually Do

• Own the Money Logic: Build and maintain the subscription, renewal, and credit-ledger machinery in our payments service — the system that decides what a patient owes, what they've already covered, and what happens next.
• Close the Loop to the Patient: Take ownership from the API through the checkout and account UI — multi-offer screens, credit displays, payment steps — so what the backend calculates is exactly what the patient sees and confirms.
• Guard the Signal: Every transaction has to emit the right payment event — that event is what releases medication. You'll treat event correctness and webhook reliability as core to the job, not an afterthought.
• Test Like It's Load-Bearing: You'll build automated coverage as you go, not after — payment logic has too many edge cases (partial credits, multi-cycle renewals, plan changes) to trust to manual QA alone.
• Work the Seam with Medical: Payments and Medical engineering share real surface area — titration, refills, and plan changes all touch both. You'll partner directly with the Medical team where the two domains meet, without needing a hard line drawn between them.

Who You Are

• A True Full-Stack Engineer: Equally comfortable in a Go service and a React/React Native screen — you don't wait for someone else to close the last mile to the user.
• Testing-Minded by Instinct: You write the test alongside the code because you don't trust yourself not to, not because a process told you to.
• Comfortable with Financial Correctness: You understand that 'close enough' doesn't work when money and medication are both on the line — you sweat the edge cases others skip.
• A Proactive Owner: You navigate ambiguity, dig into root cause, and propose the path forward rather than waiting for a fully groomed ticket.
• A Generalist by Choice: You'd rather be the person who can pick up whatever the problem needs than stay in one lane — this role rewards that instinct directly.
• Fluent with Modern Tools: You know how to use AI-assisted engineering tools to move faster without cutting corners — you treat them as part of your craft, not a shortcut around it.

The Stack

• Backend: Go, Temporal, Google Cloud Functions (TypeScript), Postgres.
• Frontend: React, React Native.
• Infra/Observability: GCP, Datadog.