Software Engineer II, Frontend, Mobile and Web

Flex • San Francisco, NY

2d • $161,000 - $175,000

About The Position

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 2025 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? About the role Flex is looking for a Software Engineer II that will be responsible for the development of our core user experience across our mobile and web platforms. In this role you will be working closely as part of a team to launch new features across our web and mobile platforms. You’ll be developing, designing, testing, and scaling new product offerings that solve complex problems in a simple way for all of our users. You can expect to be working closely with other cross functional partners across our organization on a daily basis. Our team works in an agile manner, and some of the partners you can expect to work with in this role include designers, product managers, and quality engineers. We expect you to be able to be hands-on and execute on work as both an individual, while also building products that allow for flexibility as we are evolving our product offerings.

Requirements

• A minimum of 2 years experience in React.js or React Native is required for this position.
• Strong computer science fundamentals
• A strong focus on building high quality mobile and web UIs to specifications
• Experience with various architectures and tools within the React Native and React ecosystems (Hooks, Components, Context, Redux).
• Experience delivering products at a large scale without performance bottlenecks (hundreds of thousands to millions of users)
• Write maintainable code that uses industry best practices to improve the entire software development life cycle (unit testing, linting, automation).
• Ability to write well-documented and testable TypeScript code
• Familiarity with REST API’s and tooling across web and mobile architectures
• Collaborating with engineers across multiple teams to improve code quality

Responsibilities

• Work closely with product, design, and engineering peers to launch new features across our web and mobile platforms
• Design, test, and scale new features to solve complex problems in a simple way for our customers
• Be hands-on and execute work as an individual, while also building products that allow for flexibility as we evolve our product offerings
• The ideal candidate will be comfortable leading scoping, design, & implementation for mobile/web features

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

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed
• Number of Employees: 251-500 employees