Senior Software Engineer - Mobile and Web



Software Engineering
Remote · United States
Posted on Wednesday, March 29, 2023

Flex is an early-stage, remote-first FinTech startup that is creating the best rent payment experience. It’s hard to believe that it’s 2023 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. 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 in 2023. Will you be a part of the team?

As we continue to grow our talented team, we remain committed to radical transparency, integrity, and individual growth. We believe that your unique background and experience adds tremendous value to the organization and will empower you to take absolute ownership of business challenges and the execution of solutions.
We are looking for a pragmatic teammate that will contribute significantly to critical parts of the backend codebase, participate in system design while being able to guide fellow engineers in completing the targeted work. You'll be adept at working across existing systems and bring a strong ownership of work while delivering improvements to the system. Ideally, you'll also develop your leadership voice, communication style and become a subject matter expert for key areas while building your leadership skills around technical solutions and project execution. We strive to work with a bias toward action.

What you'll bring:


A minimum of 4 years experience in React.js or React Native is required for this position.

Skills that are required:

  • 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 leading and 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
  • Able to mentor engineers in using best practices for software development

Core competencies:

  • Prior experience working on cross functional teams
  • Proficient with TypeScript (Bonus: Native iOS/Android)
  • Experience with CI/CD to improve code stability and code quality
  • Experience with IDE’s such as Android Studio & XCode & VSCode
  • Familiar with Android / iOS / Web development tool ecosystem
  • Motivated to help other engineers succeed and be effective

The national pay range for this role is $170,000-$190,000. Individual compensation will be commensurate with the candidate's experience aligned with Flex's internal leveling guidelines and benchmarks.

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 are remote-friendly with employees located throughout the US, Australia, Brazil, and Israel. 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. For full time, U.S. based employees we offer:
  • Competitive pay
  • 100% company-paid medical, dental, and vision
  • 401(k) + company stock options
  • Unlimited paid time off + company paid holidays
  • Parental leave + IVF and adoption support
  • Flex Cares Program: Non-profit company match + pet adoption coverage
  • Free Flex subscription