About OnePay

OnePay is the consumer fintech trusted by millions of Americans to make money better.

Our financial system is broken. High fees, low rates, and too few ways to actually grow your money. We’re fixing it. And we’re moving fast.

We’re an all-in-one financial services platform that brings together banking, high-yield savings, credit cards, point-of-sale lending, investing, and crypto in one place. We also partner with employers, HCM providers, gig platforms, and others to deliver embedded financial services to millions of employees and frontline workers.

We’re backed by Walmart, the world’s largest retailer, and Ribbit Capital, one of fintech’s most respected investors, giving us rare scale, distribution, and the opportunity to build something truly category-defining.

But what really sets OnePay apart is how we move. Our customers don’t have time to wait… and neither do we. This place moves fast, and we’re looking for people who are:

• Ready to run

• Hungry and driven by urgency

• Exceptional at what they do, with low ego

• Comfortable operating in motion

The Role

As a Site Reliability Engineer at OnePay, you will play a critical role in ensuring the stability, scalability, and security of the systems that power our financial products, driving reliability practices across infrastructure, platform, and application teams to support millions of customers.

What You’ll Do

• Design, build, and maintain scalable infrastructure and tooling that improves reliability, performance, and availability across OnePay’s platform

• Contribute to the evolution of our observability stack, platform libraries, cloud architecture, and CI/CD pipelines

• Develop automation and monitoring systems to detect, prevent, and remediate incidents before they impact customers

• Partner closely with product and platform engineering teams to embed reliability best practices in design, development, and deployment processes

• Lead root cause analysis and postmortems, driving long-term improvements in resiliency and fault tolerance
  

You Bring

• 5+ years of experience as a Software Engineer with a focus on building and running reliable, large-scale, distributed systems in production

• 5+ years of operational experience in observability tooling and libraries (metrics, logging, tracing) with experience using Datadog or similar tools (Prometheus, Grafana)

• Proficiency in at least one programming language (Python, Go, Java, or Node.js preferred) for automation and tooling

• Proficiency in incident management, going on-call, and writing post-mortem reports

• Excellent collaboration skills with the ability to influence and educate product engineering teams on reliability and observability best practices

• Hands-on experience with cloud platforms (AWS preferred), container orchestration (Kubernetes), and IAC tools (Terraform, Pulumi)

• Drive and proactivity – everyone here is a builder and executor
  

Tools We Use

We use Node and TypeScript on the server, leveraging the NestJS framework within a microservice-oriented architecture running on Kubernetes and AWS. On the client side, we build and ship product features for iOS, Android, and web platforms using React Native. While you don’t need experience with our exact stack, familiarity with modern software engineering practices will help you ramp up quickly.

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 [email protected].