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Senior Software Engineer – Fintech / DeFi
Location: East Coast, USA (Preferred: NYC, CT, MA, NJ) or France
Type: Full-Time
Company: Fairmint
This position is for 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 (Cursor, MCP, AI agents) 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, production-ready 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 all 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 + 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
Must be 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 + regulated DeFi, we want to hear from you.
Fairmint is an equal opportunity employer.
