Note: The job is a remote job and is open to candidates in USA. Merciv is building an enterprise stablecoin account that provides businesses with the benefits of stablecoin rails and self-custody. The Fullstack Engineer will take ownership of backend, full-stack, and security work, focusing on designing backend services, implementing smart contracts, and collaborating on customer-facing applications.
Responsibilities
- 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, especially around permissions, approvals, and money flows
- Own parts of audit/security review processes for your areas of the stack
- Coordinate with external security firms
- Build internal systems and processes with a security-first mindset appropriate for handling customer funds
Skills
- Strong background as a backend or full-stack engineer, ideally in early-stage fintech (Plaid, Brex, Ramp, modern neobanks)
- 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
- Early engineers at crypto infra/wallet/stablecoin companies
- Strong backend/full-stack engineers from top fintechs who are crypto-native
- Product/frontend contributor
Company Overview
Company H1B Sponsorship