Senior Wallet Developer

This is a fully remote position, open to applicants in United States.

📋 Description

• Create, develop, and sustain secure and scalable wallet infrastructure for digital assets and financial systems.

• Construct backend services, APIs, and wallet solutions utilizing C#/.NET, Node.js, and TypeScript.

• Design transaction workflows and integrate with digital asset networks, financial systems, Fireblocks, and other custody and wallet service providers.

• Develop and implement REST APIs, gRPC, WebSockets, streaming data, and event-driven services.

• Build and manage developer tools, internal services, and automation processes to enhance engineering productivity and system reliability.

• Work with Docker, Kubernetes, CI/CD platforms, AWS, and cloud environments.

• Employ security-first methodologies in application development, wallet infrastructure, key management, access controls, cryptographic operations, and handling sensitive financial data.

• Assess technologies and architectures for security, scalability, performance, reliability, and maintainability.

• Integrate wallet, custody, payment, blockchain, and financial services with external partners.

• Assist in transaction processing, digital asset transfers, monitoring, confirmations, reconciliation, and real-time financial data systems.

• Research and assess emerging technologies, software tools, and blockchain infrastructure.

⛳️ Requirements

• Significant professional experience in developing production-grade software.

• Advanced proficiency in C#/.NET, TypeScript/JavaScript, Node.js, or related technologies.

• Experience in building and integrating REST APIs, gRPC, WebSockets, streaming data, and event-driven systems.

• Familiarity with Docker, Kubernetes, CI/CD platforms, AWS, GCP, and cloud environments.

• Knowledge of Linux environments, command-line tools, system administration, and troubleshooting.

• Experience working with cloud and/or bare-metal infrastructure in production settings.

• Strong grasp of secure coding practices, software architecture, authentication, authorization, and secrets management.

• Background in financial services, payment systems, trading systems, digital assets, or other security-sensitive applications.

• Experience integrating with custody, wallet, payment, or blockchain service providers.

• Working knowledge of KYC, KYT, AML, Travel Rule, sanctions screening, transaction monitoring, and relevant regulatory requirements.

• Capability to troubleshoot complex issues across distributed systems and production environments.

• Bachelor’s degree in Computer Science, Information Technology, Finance, Engineering, or a related field, or equivalent professional experience.

• Experience with Multi-Party Computation (MPC) and MPC-based wallet architectures.

• Background in cryptographic key management, KMS, secure signing, custody infrastructure, transaction orchestration, and key lifecycle management.

• Familiarity with AWS infrastructure, networking, security, and identity services.

• Experience operating bare-metal infrastructure and security-sensitive production environments.

• Knowledge of wallet and custody platforms such as Fireblocks.

• Experience integrating with blockchain networks, exchanges, payment providers, custodians, and digital asset infrastructure.

• Strong understanding of blockchain transaction flows, confirmations, balances, deposits, withdrawals, and reconciliation.

• Experience designing highly available, fault-tolerant, and security-sensitive systems.

• Strong knowledge of application, API, infrastructure, and cloud security.

• Experience building internal developer tooling, automation, testing frameworks, and operational tooling.

• Experience with high-volume real-time and streaming financial data.

• Familiarity with Solidity and smart-contract technologies.

• Understanding of emerging blockchain, cryptographic, distributed-system, and financial technology.

🏝️ Benefits

• 100% Remote opportunity.