Senior Backend Platform Engineer - Payments & Blockchain

Cari Network; Northern (KY); Hybrid; USD 110,000 - 150,000; Full time

Benefits offered by this job

Equity

Remote-first policy

401(k) matching

Job summary

Cari Network is building a blockchain-based payment system that enables real-time, 24/7 transfer of digital money across traditional finance and digital asset ecosystems. As a pre-launch startup, we’re creating a new category of financial infrastructure that brings cash on chain through tokenization and powers payments for banks, exchanges, and customers.

You will own core transaction processing platform infrastructure, including signing, settlement, ordering, and concurrency-control logic.

Qualifications

• 5–7 years of backend software engineering experience with systems that require ordering guarantees.
• Strong proficiency in TypeScript and functional systems (e.g., Effect.ts) is preferred.
• Experience with durable workflow/orchestration systems (e.g., Temporal) and distributed systems is a plus.
• Solid understanding of concurrency patterns like idempotency, at-least-once delivery, and reconciliation.

Responsibilities

• Own the transaction processing platform infrastructure for signing and settlement flows.
• Own the transaction-ordering and concurrency-control logic at scale.
• Design data models, API contracts, and retry/backoff logic for owned services; write RFCs for integration.
• Define production-readiness criteria: SLOs, alerts, and runbooks.
• Lead incident response and root-cause analysis; drive postmortems.
• Assess consistency models, failure modes, and architectural risk.
• Coordinate with Banking and Blockchain engineers to translate requirements into platform capabilities.

Skills

Backend engineering

TypeScript

Effect.ts

Temporal

Concurrency control

PostgreSQL

Kafka

Tools

Temporal

Job description

Cari Network is building a blockchain-based payment system that enables real-time, 24/7 transfer of digital money across traditional finance and digital asset ecosystems. As a pre-launch startup, we’re creating a new category of financial infrastructure that brings cash on chain through tokenization and powers payments for banks, exchanges, and customers.

You will own core transaction processing platform infrastructure, including signing, settlement, ordering, and concurrency-control logic.