Remote Remote (Global) Full-time USD 170,000 – 212,500 / year

Flex is hiring a Staff Software Engineer, Backend, Money Team

Responsibilities

  • Develop and expand backend services and APIs that support core financial operations such as payments, billing, settlements, and transaction tracking.
  • Lead the design and growth of fault-tolerant, highly available platforms that accurately manage high-volume financial transactions with full auditability.
  • Offer technical direction on distributed systems, data consistency, transaction integrity, and long-term platform planning.
  • Own the full lifecycle of key initiatives, from technical design and development to deployment and operational performance.
  • Collaborate with Product, Finance, Risk, Compliance, Operations, and engineering teams to build scalable and compliant financial solutions.
  • Create integrations with external payment gateways, banks, card networks, and financial service providers.
  • Design reliable workflows for ledgers, settlements, and reconciliation to maintain financial accuracy across systems.
  • Promote engineering best practices including observability, automated testing, CI/CD, reliability, and secure coding standards.
  • Mentor team members to elevate technical standards and cultivate a culture of ownership and excellence.
  • Maintain and operate critical financial systems in production under strict requirements for uptime, security, compliance, and performance.
  • Contribute to the advancement of service-oriented and event-driven architectures, APIs, message queues, and scalable financial infrastructure.
  • Balance direct coding with architectural oversight to ensure fast delivery while preserving system maintainability.

Work Arrangement

Remote (Worldwide)

About company
Flex

Flex lets you split bills into two payments, keep more cash on hand, and build credit history—giving renters more financial control every month.

Flex helps renters split their rent and everyday bills into two smaller payments, making it easier to manage cash flow around paychecks. The platform pays rent in full and on time, while allowing users to choose a second payment date that fits their schedule.

Flex also reports on-time rent payments to TransUnion at no extra cost, helping users build credit history. It works directly with properties or through virtual payment methods, offering flexibility regardless of landlord participation.

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Job Details
Department Money Team
Category backend
Posted 7 days ago