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Talent Partner for decentralized organizations and projects that are building Web3.
Fullstack Engineer
Location
California
Posted
127 days ago
Salary
0
Seniority
Senior
Job Description
Fullstack Engineer
decircle
• 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
Job Requirements
- 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
- Health insurance
- Flexible work arrangements
- Professional development
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