Platform Engineer, Core Services

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.

Responsibilities

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

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

Nice to have

Familiarity with modern software engineering practices

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