Staff Software Engineer, FinPlatform Backend at Flex in Remote

Summary: Flex is a growth-stage FinTech company headquartered in NYC that is creating the best rent payment experience. They are seeking a Staff Software Engineer to join their core platform team and help set technical direction, shape long-term architecture, and mentor other engineers. Responsibilities: - Design, implement and maintain our Finance service and internal tooling, including financial reporting, reconciliation/audit process - Design and develop new APIs and functionalities to support large money movements across our banking partners via different payment rails, such ACH - Scale out core platform to support business growth while maintaining performance and reliability - Continuously improving our daily operations with automation, tooling, design evolution, observability etc - Work closely with product, analytics, finance and engineering peers to launch new financial features into our platform Required Qualifications: - 6+ years of experience in software development or a related field - Experience in technical leadership, guiding engineering teams through complex projects - Experience with Java, Python, Golang, or TypeScript/Node.js - Strong experience with relational SQL and NoSQL databases, such as MySQL/PostgreSQL/DynamoDB - Experience in designing and developing the fault-tolerant and scalable distributed systems - Experience with AWS cloud services: ESC/EKS, Lambda, API Gateway, VPN, RDS etc - Infrastructure as code(AWS CLI, AWS CDK/Terraform) - Strong communication skills with the ability to understand and explain technical issues to a non-technical audience - Follow engineering best practices as well as propose new ones - Experience with finance reporting and reconciliation - Deep experience with writing complex query and data mining Required Skills: Java, Python, Golang, TypeScript/Node.js, AWS cloud services Important Skills: SQL databases, NoSQL databases, Distributed systems, Infrastructure as code Nice-to-Have Skills: Finance reporting, Data mining Benefits: Competitive medical, dental, and vision available from Day 1, Company equity, 401(k) plan with company match (our company match kicks off at the beginning of 2026), Unlimited paid time off + 13 company paid holidays, Parental leave, Flex Cares Program, Free Flex subscription, Competitive compensation + company equity, Unlimited PTO