Senior Software Engineer Backend

You own transaction processing infrastructure for signing and settlement flows, including service design, correctness guarantees, transaction ordering, and concurrency control. You design data models and APIs, define production-readiness standards, lead incident response and root-cause analysis, write RFCs, and coordinate with banking and blockchain engineers.

Responsibilities

• Own transaction processing infrastructure for signing and settlement flows
• Own transaction-ordering and concurrency-control logic
• Design data models, API contracts, and retry or backoff logic
• Write RFCs for service integrations
• Define production-readiness standards, SLOs, alerting thresholds, and runbooks
• Lead incident response and root-cause analysis
• Drive postmortems that prevent recurrence
• Assess consistency models, failure modes, and system capacity
• Coordinate with banking and blockchain engineers

Requirements

• 5–7 years of backend software engineering experience
• Experience with systems requiring strict correctness or ordering guarantees
• Strong proficiency in TypeScript
• Experience with Effect or a comparable functional effect system preferred
• Experience with durable workflow or orchestration systems
• Understanding of partitioned or keyed execution, idempotency, at-least-once delivery, and reconciliation
• Production experience with PostgreSQL and Kafka or equivalent message infrastructure
• Ability to own a service independently
• Strong written communication
• Experience in fintech, payments, or regulated financial infrastructure preferred
• Experience with blockchain or custody-adjacent systems preferred
• Familiarity with Terraform or infrastructure-as-code preferred
• Experience mentoring engineers or driving cross-team technical alignment preferred

Benefits

• Equity
• Full medical benefits
• Vision benefits
• Dental benefits
• 401(k) with matching program
• Flexible vacation policy (PTO)
• Remote-first work environment