Senior Software Engineer – Fintech / DeFi
US citizen / permanent resident or French citizen.
Your role
We’re hiring a Senior Software Engineer to build the infrastructure powering the future of onchain equity.
You’ll work at the intersection of fintech, AI-assisted development, and regulated DeFi, helping us scale the systems that make equity move like code.
You’ll use the latest AI-assisted dev tools to build production-grade systems faster and smarter, shipping secure, compliant, and scalable software that bridges traditional and blockchain finance. This is a high-impact role for an engineer who wants to move fast, code with intelligence, and ship at scale.
What you’ll own
- Build and ship scalable features using React, TypeScript, Node.js, and PostgreSQL
- Leverage AI tools (Cursor, MCP, AI agents) to accelerate development and power smarter product features
- Design and optimize AWS cloud infrastructure (Lambda, Amplify, S3, API Gateway; Bedrock knowledge is a plus)
- Collaborate with product, legal, and finance teams to bridge onchain and traditional systems
- Ensure security and regulatory compliance across deployed systems
- Contribute to architecture decisions and mentor teammates on AI-assisted development best practices
What we’re looking for
- 5+ years of professional software development experience
- Advanced skills in React, TypeScript, Node.js, and PostgreSQL
- Solid experience with AWS Lambda and Amplify
- Proven record of delivering production systems in fintech or regulated environments
- Familiarity with Solidity, DAML, or Bedrock is a plus, not required
- Curiosity and comfort using AI-assisted tools daily to boost productivity and quality
- Based on the US East Coast (NYC/CT/MA/NJ preferred) or France, with regular team meetups in NYC/CT
Why join us
- Impact: build the regulated DeFi infrastructure that redefines private markets
- Innovation: use AI-assisted development to push fintech engineering forward
- Growth: work directly with founders on high-stakes, global infrastructure
- Package: competitive salary, equity, and health benefits
- Culture: no bureaucracy, full transparency, and a team that thrives on execution
How to apply
Send us your resume, GitHub, and a quick note. If you’re excited about building at the intersection of AI, fintech and regulated DeFi, we want to hear from you.
Apply for this roleFairmint is an equal opportunity employer.