Senior Software Engineer — Backend

Own core transaction-processing platform infrastructure for signing and settlement flows, including service design, correctness guarantees, transaction ordering, concurrency control, data models, APIs, production readiness, incident response, and technical documentation.

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

• Competitive salary, bonus, and equity
• Full medical benefits
• Vision benefits
• Dental benefits
• 401(k) with matching program
• Flexible vacation policy (PTO)
• Remote-first work environment