Full-Stack Engineer (Python/FastAPI + Next.js) to $6000

About Tapin.gg
Tapin.gg is a fast-growing platform at the intersection of gaming and commerce. We connect gamers with boosting, coaching, and play-with-a-pro sessions. Alongside that, we operate Shop.Tapin.gg, a Shopify-based digital goods marketplace (similar to Eldorado.gg) where players buy game accounts and items.

We are now rebuilding Shop.Tapin.gg from scratch with a modern stack (FastAPI + Next.js) so we can scale, innovate, and integrate AI into core workflows.

What you’ll do

• Lead the migration of Shop.Tapin.gg from Shopify to a custom full-stack solution.
• Implement secure, high-performance checkout flows, account trading, escrow/release logic, and dispute handling.
• Build APIs and dashboards to support inventory, sellers, payouts, and fraud monitoring.
• Integrate AI for fraud detection, moderation of listings, and personalized product recommendations.
• Design database schemas (Postgres), optimize queries, and manage async/background tasks.
• Work closely with the founder/CTO to ship fast and iterate weekly.

Tech stack

• Backend: Python 3.11, FastAPI, SQLAlchemy/Pydantic, Postgres, Redis, Celery
• Frontend: Next.js (App Router), React, TypeScript, Tailwind, shadcn/ui
• Infra: Docker, Fly.io/Vercel, GitHub Actions, Sentry
• AI: OpenAI/other LLMs for fraud detection and moderation

You are

• 4+ years professional experience building web apps; ideally marketplaces or e-commerce.
• Strong in both Python/FastAPI and React/Next.js.
• Hands-on experience with payments, escrow logic, and order lifecycle.
• Pragmatic engineer who can deliver independently in small teams.
• Bonus: background in gaming ecosystems or account/item marketplaces.

Nice to have

• Prior Shopify migration experience.
• Experience integrating Stripe, Payoneer, crypto, or other payout systems.
• Familiarity with anti-fraud systems, KYC, or trust/safety tooling.

Location and timezone

Remote OK. Some overlap with US Pacific hours preferred.

How to apply

Reply here with:

1. A short note about a marketplace or e-commerce system you’ve built.
2. Links to GitHub/portfolio (if available).
3. Your availability and earliest start date.

Interview process:

• 1x Live coding session.
• 1x Live system design round.