Software Engineer II

Flex is hiring a Software Engineer II in Brazil to build financial infrastructure for ambitious business owners. Join us in developing mission-critical banking and payments systems that empower entrepreneurs to manage money with control and intelligence.

About This Position

As a Software Engineer II at Flex, you'll contribute to a rapidly growing fintech platform reshaping how business owners access financial services. We've scaled from launch in September 2023 to nine-figure revenue with clear profitability targets, and we're building the entire financial operating system for affluent entrepreneurs. This is a full-time, in-office role in Brazil where you'll take ownership of meaningful features across our core product stack and see your work impact real customers managing between $3M and $200M in business revenue.

Your Responsibilities

• Architect and deliver medium-to-large features through their complete lifecycle, from initial design through deployment
• Develop both customer-facing functionality and internal systems, including APIs and backend services for payments and credit
• Write production-grade code focused on clarity, maintainability, and long-term ownership
• Review teammates' work and deliver constructive feedback to strengthen overall code quality
• Design solutions with end-user value and business outcomes at the center, not just technical correctness
• Operate within regulated financial services, balancing rapid iteration with compliance and risk management
• Collaborate across engineering and product teams to solve complex problems and deliver high-impact results

Who We're Looking For

• Proven software development fundamentals with the ability to work effectively within established systems and architecture
• Strong product intuition—you think deeply about how your work affects users and the business
• Genuine ownership mentality; you take responsibility for the quality and reliability of systems you touch
• Comfort researching unfamiliar problems and bringing solutions forward independently
• Professional English communication
• Experience in financial services, regulated industries, or working with sensitive data is valuable but not mandatory
• Technical proficiency with TypeScript, PostgreSQL, and cloud infrastructure (we use GCP)

More About Flex

Flex is an AI-native private bank built specifically for business owners. We're rebuilding banking, payments, credit, and financial operations as a unified, intelligent system. Our customers are the economic backbone—entrepreneurs with revenue between $3M and $200M—who've grown frustrated with fragmented, outdated tools. We've raised over $100M in equity and $300M in debt and are operating with extreme ownership and relentless execution. We deploy to production multiple times weekly, prioritize real impact over incremental improvements, and hire builders who take pride in lasting work. You'll have direct exposure to leadership, customers, and the business opportunity we're building.

Next Steps

To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.