Software Engineer I, Fullstack, Risk Engineering… at Flex · Remote

Summary: Flex is a growth-stage FinTech company based in NYC that aims to improve the rent payment experience. They are seeking a Software Engineer I to join their Risk Engineering team, where the individual will develop services and APIs for risk decisioning and fraud prevention while collaborating with experienced engineers. Responsibilities: - Build and maintain backend services and APIs in Java (Spring Boot) that support real-time risk decisioning and fraud prevention - Develop user-facing features using TypeScript with React and/or React Native for risk-related flows across web and mobile - Collaborate with product, design, and engineering partners to deliver end-to-end features from requirements to production - Write clean, well-tested, and maintainable code, participating in code reviews and learning best practices - Help monitor, debug, and support production systems, gaining experience with distributed systems and operational excellence Required Qualifications: - Bachelor's degree in Computer Science or a related field (or equivalent practical experience) - Strong foundational knowledge of Java and object-oriented programming principles - Experience with React or React Native, and proficiency in TypeScript - Understanding of data structures, algorithms, and basic system design concepts - Familiarity with REST APIs and service-oriented architectures - Experience working with relational databases and writing SQL queries - Familiarity with Git or other version control systems - Ability to communicate clearly, collaborate effectively, and ask questions - Curiosity about how systems work and a desire to learn continuously Preferred Qualifications: - Exposure to risk engineering, fraud detection, or decision platforms (through coursework, internships, or prior roles) - Experience building high-quality mobile and web UIs to product and design specifications - Experience with the React Native and React ecosystems, including Hooks, Components, Context, and Redux - Experience with Spring Boot or backend service development - Basic knowledge of cloud platforms, particularly AWS - Familiarity with CI/CD pipelines (e.g., GitHub Actions) - Exposure to observability and monitoring tools such as DataDog - Experience or coursework involving data platforms (e.g., Snowflake) - Familiarity with Infrastructure as Code concepts (e.g., CDK, Terraform) - Strong written and verbal communication skills Required Skills: Java, React, TypeScript Important Skills: Spring Boot, SQL, REST APIs Nice-to-Have Skills: Git, Curiosity, Communication, Collaboration, Problem Solving 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