Senior Software Engineer, Money

Responsibilities

• Design, develop, deploy, and support ledger and payments services that accurately record all crypto and fiat money movement across the platform.
• Build and evolve bank settlement and reconciliation pipelines that connect Gemini to external payment rails and banking partners.
• Apply sound engineering principles to identify correctness, consistency, and operational risks — and implement safeguards in software before they become incidents.
• Partner with finance, reconciliation, and treasury teams to understand real-world workflows and translate them into robust, auditable system behavior.
• Design scalable APIs and data models that support new transaction types, products, and regulatory requirements without increasing operational burden.
• Write well-tested, production-grade code that other critical systems depend on.
• Monitor and communicate the health of ledger and payment systems, proactively identify issues, and participate in incident response and remediation.
• Mentor teammates to ensure new functionality is correct, auditable, and production-ready.
• Participate in on-call rotations as needed.

Requirements

• 5+ years of experience building backend systems in a production environment.
• Strong experience designing and operating distributed, stateful systems where data integrity is critical.
• Proficiency in at least one backend language — we primarily use Scala and Go, but are open to candidates willing to learn.
• Experience with unit testing, integration testing, and CI/CD pipelines.
• Familiarity with cloud-based infrastructure (AWS, GCP, or Azure).
• Ability to reason about and debug complex system behavior across services and data stores.
• Strong communication skills and the ability to work effectively with cross-functional partners.

Core Competencies

Demonstrates expertise in designing and developing backend systems with a focus on data integrity, scalability, and operational risk management. Proficient in building robust APIs and collaborating with cross-functional teams to ensure system reliability and compliance with regulatory requirements.