Senior Developer

Senior Software Engineer – Fintech / DeFi (East Coast)Location: East Coast, USA (Preferred: NYC, CT, MA, NJ) Type: Full-TimeCompany: FairmintThis position is for US Citizen or Permanent Resident only.About FairmintFairmint is rebuilding the rails of finance so equity moves like code. Headquartered in New York, we’re a fintech leader bringing private markets onchain under regulatory guardrails.Our mission: unlock liquidity & efficiency for companies and investors worldwide through regulated DeFi infrastructure.We’ve shipped the tech, processed over $1B through our smart contracts, and now we’re scaling it from the heart of the financial capital.The RoleWe’re looking for a Senior Software Engineer who thrives at the intersection of fintech and AI-assisted development.Important note: we are not building foundational AI models or low-level AI tooling. Instead, we are deeply leveraging existing AI tools (Cursor, MCP tools, AI agents, etc.) to code faster, ship smarter features, and push the frontier of onchain equity.Your focus will be on shipping production-ready applications (frontend + backend), integrating AI-assisted workflows, and ensuring our infrastructure remains reliable, secure, and compliant.What You’ll DoBuild and ship scalable features in React, TypeScript, Node.js, and PostgreSQL.Leverage AI tools (Cursor, MCP, AI agents) to accelerate development and power innovative product features.Design and optimize cloud services on AWS (Lambda, Amplify, S3, API Gateway; Bedrock knowledge is a plus).Collaborate across product, legal, and finance teams to bridge traditional and onchain systems.Ensure security and regulatory compliance in everything you ship.Contribute to system architecture decisions and mentor teammates.What We’re Looking For5+ years professional software development experience.Advanced React / TypeScript / Node.js skills.Strong backend skills with PostgreSQL and AWS (Lambda + Amplify).Proven ability to deliver production systems in a fast-paced, regulated environment.Familiarity with Solidity, DAML, or Bedrock is a plus (not required).AI curiosity: comfort using AI-assisted tools daily to push productivity and product innovation.Based on East Coast (NYC/CT/MA/NJ preferred), remote OK with regular NYC/CT meetups.Why Join Us?Impact: Build regulated DeFi infrastructure that redefines private markets.Innovation: Apply AI-assisted development at the frontier of fintech.Growth: Work directly with founders in a high-speed environment.Package: Competitive salary, equity options, health benefits.Culture: No bureaucracy, direct access to founders, and a team that thrives at the frontier of finance + tech.How to ApplySend us your resume, your GitHub, and a quick note.If you’re excited about building tools that merge AI-assisted engineering + regulated DeFi + Wall Street, we want to hear from you.Fairmint is an equal opportunity employer.