Senior Software Engineer, Ledger & Payments

Gemini Personnel Pte Ltd; New York (NY); Hybrid; USD 140,000 - 200,000; Full time

Benefits offered by this job

Discretionary annual bonus

Equity grant

Health plans

401K with company matching

Parental Leave

Flexible time off

Job summary

Gemini is seeking a Senior Software Engineer to join the Money team, building core ledger and payments systems at scale. You will design, implement, and operate services handling crypto and fiat movements, ensuring accuracy and auditability across the platform.

The role emphasizes collaboration with finance, reconciliation, and treasury, plus ownership of APIs and data models for new transactions, with a focus on reliability, security, and regulatory readiness.

Qualifications

• 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.

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.

Skills

Backend development

Distributed systems

Scala

Go

CI/CD

Cloud platforms

Testing

Cross-functional collaboration

Job description

Gemini is seeking a Senior Software Engineer to join the Money team, building core ledger and payments systems at scale. You will design, implement, and operate services handling crypto and fiat movements, ensuring accuracy and auditability across the platform.

The role emphasizes collaboration with finance, reconciliation, and treasury, plus ownership of APIs and data models for new transactions, with a focus on reliability, security, and regulatory readiness.