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decircle logo
decircle

Talent Partner for decentralized organizations and projects that are building Web3.

Fullstack Engineer

Full-stack EngineerSoftware EngineerFull TimeRemoteSeniorTeam 1-10Since 2019H1B No SponsorCompany SiteLinkedIn

Location

California

Posted

127 days ago

Salary

0

Seniority

Senior

Bachelor DegreeEnglishDartFlutterRuby on RailsSolidity

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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