Client: US fintech (ledger and money movement platform) · Location: remote, LATAM, US Eastern overlap · Level: staff · Engagement: full-time contractor
You will be the technical lead for the core ledger and payment services written in Go, setting architecture across several teams while still shipping code.
What you will do
Own the design of the double-entry ledger and money movement services, with correctness and idempotency as first principles
Lead cross-team technical initiatives from RFC to rollout
Write and review Go for high-throughput, low-latency services using gRPC, Kafka and PostgreSQL
Define standards for testing, observability and failure handling in distributed transactions
Integrate with banking partners and payment rails (ACH, RTP, FedNow, card networks)
Mentor senior engineers and raise the hiring bar
What you bring
10+ years of backend engineering, 5+ in Go in production
Staff-level scope: has led architecture across multiple teams
Deep distributed systems knowledge: consistency, sagas, exactly-once semantics, event sourcing
Strong PostgreSQL and data modeling for financial records
Experience in payments, banking or another domain where data correctness is critical
Excellent written and spoken English
Nice to have
Direct ledger or core banking build experience
Kubernetes and AWS operations background
Familiarity with PCI DSS, SOC 2 and audit requirements
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