Senior Software Engineer, Backend – API Integrations

🕒 May 18

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Reap

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2018

💳 Fintech

₿ Crypto

🤝 B2B

Fintech • Crypto • B2B

Reap is a fintech company providing borderless, stablecoin-enabled financial infrastructure for businesses. It offers business accounts (Reap Direct), Visa corporate cards with fiat and stablecoin repayment, cross-border payments powered by stablecoins, expense management for multi-currency treasuries, and embedded finance APIs including card issuing and payment APIs to automate global fiat payouts and enable stablecoin-native finance.

📋 Description

• Own the end-to-end technical integration between Reap and the partner — including design, implementation, testing, deployment, and ongoing maintenance • Build and operate bidirectional data flows: inbound (partner → Reap: funding, settlement, account events) and outbound (Reap → partner: card events, transaction data, reconciliation signals) • Serve as Reap's primary technical point of contact with the partner's engineering team — attending syncs, reviewing their API specs, and driving alignment on integration contracts • Translate the partner's technical requirements and constraints into well-scoped engineering work inside Reap's systems • Collaborate closely with internal Reap teams — Card, Treasury, Onboarding, Compliance — to ensure integration requirements are correctly surfaced and delivered • Monitor integration health in production; own incident response for integration-layer issues • Maintain thorough integration documentation: API contracts, data flow diagrams, runbooks, and change logs • Design robust, fault-tolerant bidirectional integration architecture between Reap and our partner • Implement APIs, webhooks, event consumers, and data transformation layers • Ensure data consistency, idempotency, and auditability across integration boundaries • Build test suites covering integration contracts and edge cases • Maintain a close working relationship with partner's engineering and product teams • Drive joint technical decision-making on integration patterns, versioning, and deprecation • Proactively surface blockers and misalignments before they become production issues • Work with Card, Treasury, Onboarding, and Compliance engineers to deliver integration dependencies • Represent the integration workstream in Reap engineering planning and reviews • Own observability for the integration layer: dashboards, alerting, and SLA tracking • Lead incident response and post-mortem processes for integration-related issues • Continuously improve integration stability and reduce operational toil

🎯 Requirements

• 6+ years of backend software engineering experience • Proven experience building and operating production-grade API integrations with external partners or third-party systems • Strong understanding of integration patterns: REST APIs, webhooks, event-driven architecture, idempotency, retry logic, and error handling • Experience working across organisational boundaries — with partner or client engineering teams • Comfortable operating in ambiguity: translating loosely defined requirements into concrete engineering solutions • Clear written and verbal communication; able to represent technical decisions to both engineering and business stakeholders

🏖️ Benefits

• High-ownership, high-impact role at the frontier of stablecoin-powered finance • Work directly with strategic partners and shape how Reap expands its financial ecosystem • Operate with significant autonomy as Reap's technical owner of a key partnership • Join a high-caliber team across engineering, product, and operations • Insurance coverage after probation • Reap Card stipend • Use of AI tools at work — and the space to learn, experiment, and grow with them • A culture of innovation, inclusion, and continuous learning