Backend Engineer, Fintech

Sorry, this job was removed Sorry, this job was removed at 02:41 p.m. (CST) on Thursday, Apr 03, 2025
Hiring Remotely in United States
Remote
130K-170K Annually
Fintech
The Role

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

  • Buy-now-pay-later installment loans at Walmart

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

Software Engineers at OnePay build the products & systems that serve our customers and run our company. Besides writing, reviewing, and shipping code, engineers collaborate with others across the company, from product, design, and data to, customer support, ops, and compliance. Software Engineers at OnePay are highly technical, communicative, and emotionally intelligent.

  • Architect, design, and implement software applications for consumer products

  • Develop features from the ground up ( 0->1 )

  • Write robust documentation. As a growing and remote organization, having the necessary docs are key to our success. 

  • Build and maintain vendor integrations.

  • Solve complex, real-world problems involving large-scale money movement and sensitive financial data.

You bring

  • 3-7 years of experience

  • Bachelor's degree, Computer Science preferred 

  • Experience working in a high-scale banking or fintech organization

  • Professional experience building, shipping — and growing customer-facing products

  • Knowledge of banking protocols, API’s, and security standards

  • Deep understanding of event-driven architecture and microservices

  • Solid understanding of banking systems, financial transactions, and payment processing

  • Experience leading, mentoring, and demonstrating excellence in execution. You need little oversight when given a problem to solve, and you have a track record of getting things done.

  • Passion for your craft and care for the people you work with. You value quality across code, communication, and culture.

  • A desire to keep growing your skills, and an ability to learn quickly. We hope you’ll be here for a while, and there’s no better investment than in our people.

  • The Triple H Factor: Hungry, Humble, Honest

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

Pay Transparency

The estimated annual base salary for this position ranges from $130,000 to $170,000.  Pay is generally based upon the level, complexity, responsibility, location and job duties/requirements of the specific position. We then source candidates with the requisite skills, expertise, education, training, and experience.  If you are selected for an interview, please feel welcome to speak to a Talent Partner about our compensation philosophy and other available benefits.


We use Covey as part of our hiring process for jobs in NYC and certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on May 31, 2024.

Please see the independent bias audit report covering our use of Covey here.

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 talent@onepay.com.

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The Company
HQ: New York, NY
350 Employees
Hybrid Workplace
Year Founded: 2023

What We Do

We're on a mission to help people achieve financial progress.

We're seeking team members who are hungry, humble, and honest to help us build simple solutions for people to save, spend, and grow their money — all in one place. Here you’ll have the opportunity to challenge the status quo with proven leaders in fintech, banking, consumer products, and tech.

One is backed by Walmart and Ribbit Capital. Learn more about us at www.one.app.

Follow for the latest news and updates on employee life.

One card is issued by Coastal Community Bank pursuant to licensing by Mastercard® International.

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