Über
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.
Backend & Integrations
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 Smart Contracts & Security Implement and review Solidity smart contracts, focusing on correctness, safety, and upgradeability Contribute to threat modeling, security reviews, and audit/vendor management Product & Full-Stack Work
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 Security & Audit Participation
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 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
Preferred Backgrounds
Early engineers at crypto infra/wallet/stablecoin companies Strong backend/full-stack engineers from top fintechs who are
crypto-native
Sprachkenntnisse
- English
Hinweis für Nutzer
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