Senior Wallet Developer

Senior Wallet Developer Location: 100% Remote (U.S. only — must reside in Eastern or Central time zone) *YOU MUST LIVE CURRENTLY IN THE UNITED STATES WITH PROOF OF RESIDENCY* Compensation: $200,000+ base salary, plus bonus Work Authorization: U.S. Citizens or Green Card holders only (no sponsorship or C2C) Note: This is a remote role, but candidates must be based in the U.S. in the Eastern or Central time zones. Applicants based in California cannot be considered at this time. About the Company We are a fast-growing financial technology company powering digital asset exchanges and brokerages worldwide. Our secure, scalable, and customizable white-label digital asset trading platform has enabled 150+ customers across 35 countries to launch and operate digital asset markets and digitize assets. Our award-winning blockchain technology has helped startups and institutions execute their blockchain strategies since 2013. About the Role We are seeking a Senior Wallet Developer to design, build, and maintain secure, scalable wallet infrastructure for digital assets and financial systems. This role spans backend services, wallet technology, external integrations, real-time systems, infrastructure, and emerging technologies — and is central to how we move, secure, and safeguard digital assets at scale. What You'll Do Own software development, systems integration, system design, and implementation of secure wallet infrastructure.Develop backend services, APIs, and wallet systems using C#/.NET, Node.js, and TypeScript.Design and implement secure wallet infrastructure, transaction workflows, and integrations with custody/wallet providers (e.g., Fireblocks) and MPC technologies.Develop and integrate REST APIs, gRPC, WebSockets, streaming data, and event-driven services.Apply a security-first approach to key management, access controls, cryptographic operations, and sensitive financial data.What You'll Need Strong professional experience developing production-grade software.Advanced experience with C#/.NET, TypeScript/JavaScript, Node.js, or similar technologies.Experience building and integrating REST APIs, gRPC, WebSockets, streaming data, and event-driven systems.Experience with modern infrastructure and deployment technologies such as Docker, Kubernetes, CI/CD, AWS, or GCP.Experience in financial services, payments, trading systems, digital assets, or other security-sensitive applications.Nice to Have Experience with Multi-Party Computation (MPC) and MPC-based wallet architectures, including cryptographic key management and custody infrastructure.Familiarity with wallet/custody platforms (e.g., Fireblocks) and blockchain transaction flows — confirmations, deposits, withdrawals, and reconciliation.