React Native Engineer- Design Systems

ONE (one.app); United States; Remote; USD 100,000 - 130,000; Full time

Job summary

A leading financial services app is seeking a React Native Engineer to create elegant mobile experiences focused on UI animations. You'll work with a modern tech stack, partner with team members to deliver engaging features, and drive performance optimization. This role offers competitive salary, stock options, and a flexible remote-friendly culture.

Benefits

Competitive salary

Stock options

Health benefits from Day 1

401(k) plan with company match

Flexible time off

Opportunities for growth

Qualifications

• 5+ years of experience building and deploying iOS and Android apps with React Native.
• Experience with UI animations and interaction design.
• Strong understanding of mobile performance optimization.

Responsibilities

• Build and ship animation-rich features for the app.
• Employ best practices like code reviews and automated testing.
• Optimize animations for performance across devices.

Skills

React Native

UI animations

Interaction design

Mobile performance optimization

Problem-solving

Proactivity

Tools

Node.js

TypeScript

AWS

Kubernetes

fp-ts

Job description

About OnePay

OnePay is a consumer financial services app with an exceedingly simple mission: to help people achieve financial progress.

Tens of millions of Americans today are unbanked or underbanked, meaning they don’t have enough money in savings to cover a minor emergency. They pay too much in fees, don’t have access to credit at affordable rates, and have little ability to grow their wealth. OnePay’s vision is to create a single app for consumers to save, spend, borrow, and grow their money, bringing our mission to life with simple and accessible banking, credit, and payments products that deliver a best-in-class experience to millions of customers. Our products include:

• Checking and high-yield savings accounts
• Domestic and international peer-to-peer payments
• Credit Builder and credit score monitoring
• Digital wallet / contactless payment solutions
• Credit card program
• Buy-now-pay-later installment loans at Walmart
• Prepaid mobile service

Why do we have a right to win? We have the backing of Walmart (a Fortune 1) and Ribbit Capital (a preeminent fintech investor), are deeply embedded with the distribution of the world’s largest omnichannel retailer, and have an industry-leading multi-product value proposition — all in addition to having some of the best people and talent in the industry.

There’s never been a better time to build a category-defining business and there has rarely been a team better positioned for the opportunity. Join us!

The Role

As a React Native Engineer at OnePay, you'll craft simple, elegant mobile experiences that sit at the heart of our customers\' financial lives - with a focus on UI animations and interaction design that make our app feel fast, intuitive, and delightful. You will:

• Build and ship animation-rich features that bring joy and clarity to our customers’ financial journeys
• Employ best practices such as code reviews, automated testing, and continuous delivery on a modern React Native stack to achieve both quality and velocity
• Partner with product managers, designers, and engineers to bring interaction and motion design concepts to life
• Optimize animations for performance across devices and platforms, ensuring smooth and consistent experiences
• Own your work from concept to launch, earning the trust of teammates through accountability and transparency

You Bring

• 5+ years of professional experience building and deploying iOS and Android apps with React Native
• Deep experience with UI animations and interaction design (e.g., React Native Reanimated, Gesture Handler, Lottie, or native animation APIs)
• Experience building out scalable design system libraries or components
• Strong understanding of mobile performance optimization, including frame rate, rendering, and device resource constraints
• Passion for your craft and genuine care for teammates—quality in code, communication, and culture is non-negotiable
• Act-like-an-owner mentality: you proactively identify problems and drive them to resolution
• Drive and proactivity – everyone here is a builder and executor

Tools we use

We use the fp-ts library for functional programming with Node/TypeScript running on top of Kubernetes and AWS. We believe great engineers can learn any stack, so you do not need experience with these specific tools, but you’ll ramp up more quickly if you are familiar with functional programming concepts.

What We Offer

• Competitive base salary, stock options, and health benefits from Day 1
• 401(k) plan with company match
• Remote-friendly (US), flexible time off (FTO), and opportunities for growth
• A high-growth, mission-driven, inclusive culture where your work has real impact

Standard Interview Process

• Initial Interview with Talent Partner
• Technical or Hiring Manager Interview
• Team Interview
• Executive Interview
• Offer!

Equal Employment Opportunity

To build technology and products that are used and loved by people and solve real-world problems, we need to build a team with many different perspectives and experiences. We are an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We encourage candidates from all backgrounds to apply. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us at [e-mail].