Platform Engineer, Builder Experience

OnePay; United States; On-site; USD 130,000 - 210,000; Full time

Job summary

OnePay is building a unified consumer fintech platform powering banking, savings, cards, lending, investing and crypto. As a Platform Engineer on the Builder Experience Team, you will create core platform services and developer frameworks for large-scale, distributed systems powering intelligent, agent-driven applications.

You will design and operate platform services, develop internal tooling, and evolve frameworks to accelerate engineering velocity.

Qualifications

• 2-9 years of software engineering experience in fintech, cloud infra, or large-scale distributed systems.
• Experience building developer platforms or internal tooling to accelerate engineering.
• Deep expertise in distributed systems with high availability and async processing.
• Production AWS cloud experience and cloud-native infra.

Responsibilities

• Design and operate platform-oriented core services for high-scale distributed systems.
• Develop internal tooling and shared infrastructure to improve velocity and observability.
• Build and evolve frameworks for agentic apps and automated workflows across products.
• Drive CI/CD enhancements to speed deployments with reliability and confidence.

Skills

Distributed systems

Cloud infrastructure

AWS

CI/CD pipelines

Developer tooling

Agentic workflows

Proactive builder

Tools

AWS

CI/CD tooling

Job description

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 Platform Engineer on the Builder Experience Team at OnePay, you will build the core platform services and developer frameworks that power large-scale, distributed systems and enable the next generation of intelligent, agent-driven applications.

What You’ll Do

• Design and operate platform-oriented core services that support high-scale distributed systems across OnePay’s product ecosystem
• Develop internal developer tooling and shared infrastructure that improve velocity, reliability, and observability across engineering teams
• Build and evolve frameworks that support the construction and orchestration of agentic applications, enabling intelligent, automated workflows across products
• Drive enhancements in CI/CD pipelines, automation, and developer workflows to increase deployment speed, reliability, and confidence across teams

You Bring

• 2-9 years of experience in software engineering within fintech, cloud infrastructure, or large-scale distributed systems environments
• Experience building developer platforms, internal tooling, or frameworks that enable other engineers to move faster
• Deep expertise in distributed systems, asynchronous processing, and high-availability platform services
• Production experience in AWS cloud environments and building cloud-native infrastructure
• Demonstrated experience designing and building agentic developer tools that empower automation, collaboration, or intelligent workflows
• Strong experience working with CI/CD pipelines and driving continuous integration and delivery improvements
• Drive and proactivity – everyone here is a builder and executor

Standard Interview Process

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