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Reins is building an enterprise stablecoin account that looks and feels like a first-class business bank account, while giving companies the benefits of stablecoin rails and self-custody. Reins makes stablecoins operationally simple for businesses, providing familiar banking features such as ACH, wires (and global equivalents like SEPA), cards, multi-level permissions, approvals, and AML/compliance workflows—combined with stablecoin-native advantages like instant 24/7 global settlement, better control via self-custody, and access to lending, insurance, and exchange markets as DeFi infrastructure matures.
Role Overview
You’ll work directly with founder and CEO Sebastian Delgado (co-founder of Fei Labs), taking ownership of meaningful chunks of backend, full-stack, and security work. The role is flexible:
Full-stack engineer (preferred)
Backend engineer
Product/frontend contributor (optional)
Focus areas are prioritized as follows: security & smart contracts, full-stack, backend, and product/frontend. Infrastructure/devops is not a current priority.
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
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