Backend Engineer, Payments Infrastructure & Scale

arcadia; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Job summary

Arcadia seeks a Backend Engineer to own the reliability, scalability, and architecture of its core fintech infrastructure. You will build and scale payment systems, ledger integrity, and data pipelines in a fast-growing startup environment.

You’ll work with a small, highly technical team to own end-to-end projects from design to production, driving reliability, security, and compliance in high-volume financial transactions.

Qualifications

• Production-grade backend systems experience.
• Experience with distributed systems and microservices.
• Strong reliability, scalability, fault tolerance, and performance knowledge.
• Experience with financial infrastructure or transactional applications.
• Database design, data integrity, and transaction reconciliation expertise.
• Familiarity with asynchronous processing and queues.
• CI/CD pipelines, automated testing, monitoring, and cloud infrastructure experience.
• Ability to own complex technical projects end-to-end, from architecture to production deployment.
• Proactive, ownership-driven approach to engineering.

Responsibilities

• Own Core Backend Infrastructure: Design, build, and maintain reliable, scalable backend services powering payments and transactions.
• Build & Scale Payment Systems: Develop infrastructure supporting payment processing, card issuing, and financial integrations.
• Ensure Ledger Integrity & Reconciliation: Build systems for automated reconciliation and transaction validation across services.
• Scale Distributed Systems: Architect services to handle growth in users, transactions, and complexity.
• Develop CI/CD & Deployment Infrastructure: Establish automated tests, pipelines, and staging environments.
• Improve Monitoring & Reliability: Implement observability, alerting, and automated recovery processes.
• Strengthen Security & Compliance: Design secure infra meeting regulatory requirements for financial institutions.
• Build Data Infrastructure: Improve data systems for financial reporting, monitoring, and BI.
• Drive Technical Decisions: Own architectural decisions and infra improvements as the company scales.

Skills

Backend systems

Distributed systems

High-throughput

CI/CD pipelines

Security & compliance

Database design

Asynchronous processing

Ownership mindset

Problem-solving

Job description

Arcadia seeks a Backend Engineer to own the reliability, scalability, and architecture of its core fintech infrastructure. You will build and scale payment systems, ledger integrity, and data pipelines in a fast-growing startup environment.

You’ll work with a small, highly technical team to own end-to-end projects from design to production, driving reliability, security, and compliance in high-volume financial transactions.