Platform Engineer (Core Services)

ONE; United States; On-site; USD 140,000 - 220,000; Full time

Job summary

OnePay is seeking a Platform Engineer to build core platform services and developer frameworks powering large-scale distributed systems and intelligent, agent-driven applications.

You will design and operate platform services across the product ecosystem, architect Kafka-based streaming for real-time workflows, and partner with engineering, data, and AI teams in a cloud-native AWS environment.

Qualifications

• 7+ years of software engineering experience in fintech, cloud infra, or large-scale distributed systems.
• 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 for engineers to move faster.
• Proactive, self-driven builder mentality.

Responsibilities

• Build core platform services and developer frameworks powering large-scale distributed systems and intelligent, agent-driven applications.
• Design and operate platform-oriented core services 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.
• We use Node and TypeScript on the server, leveraging the NestJS framework within a microservice-oriented architecture running on Kubernetes and AWS.

Skills

Distributed systems

Kafka

AWS

Cloud infrastructure

Asynchronous processing

High availability

Developer platforms

Internal tooling

Tools

Kafka

NestJS

Node.js

TypeScript

Kubernetes

React Native

AWS

Job description

Requirements

• 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

What the job involves

• As an 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
• 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
• 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