Senior Software Engineer, Backend

About the role

Flex is building an AI-native private bank for business owners, re-architecting financial systems from the ground up. As a senior software engineer, you will work across the stack with a focus on the back-end to drive the creation of financial products. You will own large domains and features, contributing to technical design and engineering culture as an early employee.

Responsibilities

• Take ownership over large domains and features related to card processing, issuing, and core ledgering of financial transactions.
• Play a critical role in the development, design, and maintenance of the platform and services.
• Architect well thought-out services and data models to ensure continued growth.
• Own problems end-to-end, including API contracts, data, scalability, security, observability, and metrics.
• Lead by example and mentor engineers in planning, development, and testing.
• Drive best-in-class technology frameworks and tooling while staying engaged with industry trends.
• Participate in on-call rotations to solve problems for the servicing team.

Required skills

• NodeJS
• TypeScript
• Server design
• Scalable systems
• Asynchronous systems
• Cloud infrastructure
• API design
• Micro-services

Qualifications

• Four or more years of relevant industry experience with a track record of shipping high-quality products and features at scale.

About the Company

Flex is an AI-native private bank for business owners that has scaled from zero to nine-figure annualized revenue since launching in September 2023. The company has raised over $100M in equity and $300M in debt to build a single, intelligent financial system for ambitious owners.