Flex is a growth-stage, NYC headquartered FinTech company that is creating the best rent payment experience. It’s hard to believe that it’s 2026 and paying rent on time is expensive, inflexible, and difficult. We’re here to change that! Flex enables our users to pay rent throughout the month on a schedule that better fits their finances and budget. Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense. After deliberately keeping a stealth profile as we built up unprecedented investor support and an enthusiastic user base, we are looking for motivated individuals to help us keep our mission growing. Will you be a part of the team?
Flex is looking for a Software Engineer I to join our Risk Engineering team. In this role, you will contribute to the development of services and APIs that support Flex’s risk decisioning, fraud prevention, and credit access systems.
You’ll work closely with experienced engineers and technical leaders to deliver reliable, scalable features across both backend services and user-facing applications. This role is ideal for engineers who enjoy working across the stack, are eager to learn, and want to see their work directly impact product safety and customer access.
What you’ll do- 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.
- 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.
- Tier A (NYC/SF): $120,000—$150,000 USD
- Tier B: $108,000—$135,000 USD
- Tier C: $102,000—$127,500 USD
#LI-Remote
Life at Flex:
We understand that it takes a diverse team of highly intelligent, curious, determined, empathetic, and self aware people to grow a successful company. Our HQ is located in New York City, but we have employees located throughout the US, Australia, Canada and South America. We are growing quickly, but deliberately, with a focus on building an inclusive culture. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity workplace.
We offer many employee benefits & perks. For full-time U.S based positions we offer:
- 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
For full time non-US employees, we offer
- Competitive compensation + company equity
- Unlimited PTO
Top Skills
What We Do
Flex, an NYC-headquartered FinTech company, has created a trusted rent payment experience. It’s hard to believe that it’s 2024 and paying rent on time is expensive, inflexible, and difficult; we’re here to change that! We enable our users to pay rent throughout the month on a schedule that better fits their finances and budget, while also helping them build credit.
Our mission is to empower as many renters as possible with flexibility over their most significant recurring expense.
Why Work With Us
We believe it takes a diverse team of curious, determined, empathetic, and self aware people to grow a successful company. We value the unique and dynamic perspectives our team brings to solve critical problems that impact the lives of our users and the financial decisions they make.
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