Platform Engineer

Role Description

As a Platform Engineer 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
• Architect, build, and manage Kafka-based event streaming systems that power real-time data flows and mission-critical financial workflows
• 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
• Partner closely with engineering, data, and AI teams to solve complex distributed computing challenges in a secure, cloud-native AWS environment

Qualifications

• 7+ years of experience in software engineering within fintech, cloud infrastructure, or large-scale distributed systems environments
• Strong hands-on experience designing, operating, and scaling Kafka-based event-driven architectures
• Deep expertise in distributed systems, asynchronous processing, and high-availability platform services
• Production experience in AWS cloud environments and building cloud-native infrastructure
• Experience building developer platforms, internal tooling, or frameworks that enable other engineers to move faster
• Drive and proactivity - everyone here is a builder and executor

Requirements

• Tools 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
• Familiarity with modern software engineering practices will help you ramp up quickly

Benefits

• 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

Company Description

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