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Jack & Jill·San Francisco, United States·onsite

Senior Full-Stack Engineer (+ Equity) at SYSTM

Posted 19 days ago
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Ruby on RailsReactTypeScript

About the role

What you'll do

  • Lead the technical architecture of a fintech platform focused on stablecoin payments and AI-powered financial tools.
  • Build and maintain multi-currency wallets, stablecoin on/off ramps, and yield optimization infrastructure using Stellar and USDC.
  • Develop an Agentic CFO layer leveraging LLM-powered financial intelligence with autonomous action capabilities.
  • Create and enhance a high-performance React/TypeScript merchant dashboard and robust Node.js/Python backend services.
  • Serve as the primary technical leader, making all build-vs-buy decisions and shaping the engineering culture from the ground up.

What you should know

  • This role offers a significant equity stake (1–5%) and the opportunity to be a founding technical leader.
  • Candidates will face the challenge of scaling a fintech product from early design partners to global scale.
  • Applicants should be prepared to work in a fast-paced, high-ownership environment with direct founder collaboration.
  • The role requires experience shipping production-grade AI/LLM features and fintech or blockchain domain expertise.
  • Working onsite in London, UK, the position demands strong leadership to shape engineering culture and product direction.

About the company

  • SYSTM is a VC-backed fintech startup focused on building a stablecoin financial OS for cross-border finance.
  • Founded by Jasper Tay, ex-Co-Founder & COO of Plutus, with deep expertise in regulated fintech and blockchain.
  • The company is in a pre-seed stage with significant growth potential and a strong focus on innovation in finance.
  • SYSTM integrates cutting-edge technologies like Stellar blockchain, USDC stablecoin, and autonomous AI agents.
  • The culture emphasizes entrepreneurial spirit, technical leadership, and pioneering new financial infrastructure.

Key required skills

ReactTypeScriptNode.jsPythonStellar - blockchainUSDC - stablecoinLLMAIFinancial technology

Summary generated from the original posting.