Senior Software Engineer — Backend

Remote (U.S.) — Full Time The Cari Network is building a blockchain-based payment system powering real-time, 24/7 movement of digital money across the traditional finance and digital asset ecosystems. A pre-launch startup, we’re creating an entirely new category of financial infrastructure that brings cash on chain through tokenization while powering the full spectrum of payments for our network—banks, digital asset exchanges, and, most importantly, the customers they serve. About The Role You'll own core transaction processing platform infrastructure that our banking and blockchain services both build on—the durable workflow and ordering layer that keeps financial operations correct under concurrency. You'll be the trusted technical decision-maker for the services you own—defining what production-ready looks like, leading incident response when something breaks, and writing the design docs that other engineers, including ones outside your immediate team, build against. What You'll Do Own our transaction processing platform infrastructure for signing and settlement flows—service design, correctness guarantees, and operational healthOwn the transaction-ordering and concurrency-control logic that keeps our transaction processing platform correct and consistent at scaleDesign data models, API contracts, and retry/backoff logic for the services you own; write RFCs that Banking and Blockchain engineers rely on when integrating against your servicesDefine what "production-ready" means for platform services you own: SLOs, alerting thresholds, and runbooksLead incident response and root-cause analysis for the services in your domain, and drive postmortems that prevent recurrenceReason about consistency models, failure modes, and capacity for the systems you own, and flag architectural risk before it becomes an incidentCoordinate directly with Banking and Blockchain engineers who depend on your services, translating their requirements into platform capabilities Qualifications 5–7 years of backend software engineering experience, ideally including systems with strict correctness or ordering guarantees (financial transactions, ledgers, distributed queues)Strong proficiency in TypeScript; experience with Effect (effect.ts) or a comparable functional effect system strongly preferredExperience with durable workflow or orchestration systems (e.g. Temporal or similar)—either operating one in production or designing services on top of oneSolid understanding of concurrency control patterns: partitioned/keyed execution, idempotency, at-least-once delivery, and reconciliationProduction experience with PostgreSQL and Kafka or equivalent message infrastructureComfortable owning a service independently, including the judgment calls on reliability and design that come with itStrong written communication—you'll be writing RFCs that people outside your immediate team act on Nice to Haves Prior work in fintech, payments, or another regulated financial infrastructure environmentExperience with blockchain or custody-adjacent systems (transaction signing, nonce management)Familiarity with Terraform or infrastructure-as-code for provisioning the services you ownExperience mentoring engineers or driving cross-team technical alignment What We Offer Competitive compensation: salary, bonus, and equityFull medical, vision, dental benefits401(k) with matching programFlexible vacation policy (PTO) and remote-first work environment Interested in this role? Send us your resume. ‹ Staff Software Engineer — Backend Senior Data Engineer ›