Senior Software Engineer, Institutional Custody

Design, develop, and maintain crypto wallet systems and backend services using TypeScript, Node, REST APIs, and Go. Architect modular, scalable systems with a security-first approach, build real-time features, and collaborate with partners and cross-functional teams to deliver production-grade solutions.

Responsibilities

• Design, develop, and maintain crypto wallet systems using TypeScript, Node, REST APIs, and Go
• Architect modular, scalable backend systems focused on security and performance
• Design and operate REST APIs and model data using Postgres or SQLite
• Build real-time features with WebSockets and webhooks
• Collaborate with partners and cross-functional teams on integrations and configurations
• Implement auditability and observability and manage secrets
• Assess client needs and recommend tailored technical solutions
• Deliver high-quality, secure backend solutions with strong ownership

Requirements

• 5+ years of hands-on engineering experience delivering backend and fullstack features with TypeScript and Node
• Prior senior-level engineering experience in a blockchain, DeFi, or crypto organization
• Deep understanding of UTXO and account models and consensus mechanisms
• Experience designing and operating REST APIs and modeling data in Postgres or SQLite
• Experience building real-time features with WebSockets and webhooks
• Familiarity with Kubernetes, Docker, CI/CD, and Cloudflare
• Experience with GitHub Actions and microservices architecture
• Security-first mindset including secrets management, auditability, and observability