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Fullstack Engineer

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Fullstack Engineer developing solutions for enterprise stablecoin accounts at fintech startup. Collaborating on backend, smart contracts, and customer-facing applications.

Posted 5/15/2026full-timeRemote • California • 🇺🇸 United StatesMid-LevelSeniorWebsite

Tech Stack

Tools & technologies
DartFlutterRuby on RailsSolidity

About the role

Key responsibilities & impact
  • You’ll work directly with founder and CEO
  • Taking ownership of meaningful chunks of backend, full-stack, and security work
  • Design and build backend services connecting custody, fiat rails, policies, and operational workflows
  • Implement and maintain APIs and services for ACH, wires, cards, permissions, AML/compliance workflows, and reporting
  • Implement and review Solidity smart contracts, focusing on correctness, safety, and upgradeability
  • Contribute to threat modeling, security reviews, and audit/vendor management
  • Collaborate on the design and implementation of customer-facing applications (currently Dart/Flutter)
  • Translate user and operational needs into product and UX decisions
  • Own parts of audit/security review processes for your areas of the stack
  • Coordinate with external security firms

Requirements

What you’ll need
  • Strong background as a backend or full-stack engineer, ideally in early-stage fintech
  • Experience with crypto infrastructure, wallets, or stablecoin projects
  • Proficiency in Solidity smart contracts or a willingness to contribute to security-critical logic
  • Familiarity with APIs, integrations, and operational workflows (ACH, wires, cards, permissions, AML/compliance)
  • Ability to collaborate on frontend/product work is a plus (Dart/Flutter experience beneficial)
  • Strong understanding of security best practices for handling customer funds
  • Excellent problem-solving, attention to detail, and autonomy in early-stage environments
  • Preferred Backgrounds: Early engineers at crypto infra/wallet/stablecoin companies
  • Strong backend/full-stack engineers from top fintechs who are crypto-native

Benefits

Comp & perks
  • Health insurance
  • Flexible work arrangements
  • Professional development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
backend engineeringfull-stack engineeringSolidityAPI developmentACHwirescardsAML complianceDartFlutter
Soft Skills
problem-solvingattention to detailautonomycollaboration