As the most critical hire of 2026, you will own the technical architecture of a platform revolutionizing cross-border finance. Working directly with a founder from Plutus, you will build the infrastructure for stablecoin payments and an AI-powered Agentic CFO layer, transitioning the product from early design partners to global scale.
Back to all jobs
London, UKNot Disclosed + Equity
Featured roleLondon, UKNot Disclosed + Equity
Senior Full-Stack Engineer at SYSTM — VC-backed fintech startup
Join SYSTM as a founding-level Senior Full-Stack Engineer and build the financial operating system for the stablecoin era. Working directly with the former COO of Plutus, you'll own the technical architecture of a platform combining USDC, Stellar, and AI-powered 'Agentic CFO' intelligence to automate global treasury for SMBs. With 25+ design partners already signed and a pre-seed round closing, this is a rare opportunity to secure 1–5% equity and define the engineering culture of a high-growth fintech startup from day one. If you have deep experience in React, Node/Python, and production LLMs, this is your moment to build the future of programmable finance.
Overview
Why this role stands out
Company
SYSTM - VC-backed fintech building the stablecoin financial OS
Responsibilities
What you will do
- Architect and build multi-currency wallets, stablecoin on/off ramps, and yield optimization infrastructure using Stellar and USDC rails.
- Develop the Agentic CFO layer, implementing LLM-powered financial intelligence with autonomous action capabilities and observable AI pipelines.
- Lead the development of a high-performance React/TypeScript merchant dashboard and robust Node.js/Python backend services that meet high compliance standards.
Candidate profile
Who this is a fit for
- 5+ years of full-stack experience with React/TypeScript and Node.js or Python, demonstrating high senior-level ownership of complex product architectures.
- Proven track record shipping production-grade AI/LLM features, including agentic workflows, RAG pipelines, or prompt engineering at scale.
- Entrepreneurial background as an early engineer or CTO, ideally with domain expertise in fintech, payments, or blockchain infrastructure like Stellar.
===
What makes it remarkable
Why this role is remarkable
- Significant equity stake (1–5%) in a pre-seed startup founded by Jasper Tay, the former Co-Founder & COO of Plutus with a decade of regulated fintech experience.
- You will be the primary technical leader, making all build-vs-buy decisions and shaping the engineering culture from the ground floor as the company closes its funding round.
- Direct exposure to the cutting edge of finance, integrating Stellar and USDC with autonomous AI agents to automate treasury management for 25+ signed design partners.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
About Jack & Jill
Meet Jack
Jack gets to know what you are great at, what you want next, and makes sure Jill considers you for the right opportunities.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack