Join a fast-growing fintech marketplace as a Senior Fullstack Engineer to design and maintain real-time payments infrastructure, processing large ACH transactions via Stripe and banking integrations. You’ll build and scale a custom double-entry ledger system while collaborating in a small payments engineering team. Requires 4+ years of fullstack experience with financial transactions, strong Python backend skills, and proficiency in React/React Native.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Job Description
A fast-growing marketplace platform is building the financial engine behind its double-sided marketplace and they are hiring a Senior Fullstack Engineer (70% backend) to help own it.
You'll be working on real-time payments infrastructure moving large ACH transactions across a platform that grew 500+% last year, backed by leading industry investors.
What you'll be doing:
🔹 Processing thousands of large-value transactions ($100K+) via Stripe and banking partner integrations
🔹 Building and maintaining a custom double-entry ledger system
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🔹 Developing new ledgers for upcoming lending and financial products
🔹 Working ~70% backend (Python) with React/React Native on the frontend
🔹 Collaborating in a tight-knit payments pod (3 engineers total)
What we're looking for:
✅ 4+ years fullstack experience with large financial transactions (ACH, real-time payments)
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✅ AI-natice, especially with Claude
✅ Strong Python backend skills; comfortable across React/React Native
✅ Experience with Stripe, Postgres, AWS
Details:
💰 c.$180K base + competitive equity + pension +health
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🌎 100% remote, must be US-based
✈️ Open to visa transfers (OPT, H1B)
🏢 ~50 employees | Well-funded, backed by top-tier investors
There's lot's more to discover!
📩 Interested or know someone who'd be a great fit? Apply here or reach out to me directly — john@treqs.ie
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