Key Facts

Remote From:

United States

Full time

146 - 210K yearly

English

Hard Skills

Other Skills

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Collaboration
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Communication
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Teamwork
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Mentorship
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Team Motivation
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Problem Solving

Roles & Responsibilities

4+ years of experience in React.js or React Native
Strong computer science fundamentals
Experience with React ecosystems (Hooks, Components, Context, Redux) and related architectures/tools
Experience leading and delivering high-scale products without performance bottlenecks

Requirements:

Develop the core user experience across mobile and web platforms
Collaborate with designers, product managers, and quality engineers to launch new features and iterate on product offerings
Design, test, and scale new product offerings to solve complex problems while maintaining performance for large user bases
Be hands-on and mentor engineers, writing maintainable TypeScript code and promoting software development best practices

Flex

Financial Services

About Flex

Flex is a simple app that’s changing the way the world pays and collects rent. Our technology makes the 1st of the month easy for renters and properties. For renters, we pay the rent on the 1st and let you pay it back when it works better for your budget. We help you buy some time (or whatever else you’re eyeing). For properties, we help you collect more and stress less. And we do the previously impossible by turning rent collection into a marketable amenity. WHAT WE STAND FOR •We believe you should be able to choose when you pay your bills. The flexibility of buy-now-pay-later has forever changed the way the world makes purchases. We believe the same flexibility should be available for one of life’s #1 expenses: rent. •We believe in the win-win. We like helping people keep commitments. With our technology, properties get the rent and renters get the time. The future is flexible. •We believe in the end of rent regret. Sharing human spaces used to be easier. But then payment came into the picture and rent regret was born. The worst part of rent regret is that it separates us from each other. We’re committed to solving rent regret forever.

Company type: Scaleup

Industry: Financial Services

Founded: 2018

Company size: 201 - 500

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Job description

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?

About the job

Flex is looking for a Senior Software Engineer 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.

In this role, 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.

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

Minimum Qualifications

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

Preferred Qualifications

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 VSCode & Android Studio & XCode
Familiar with Android / iOS / Web development tool ecosystem
Motivated to help other engineers succeed and be effective

Flex takes a market-based approach to pay, and compensation may vary depending on your primary work location. Work locations are categorized into one of three tiers based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be commensurate with their experience, qualifications, and Flex’s internal leveling guidelines and benchmarks.

Tier A (NYC/SF/Seattle): $172,000—$210,000 USD
Tier B: $154,000—$190,000 USD
Tier C: $146,000—$180,000 USD

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