Platform Engineer, Core Services

Oneapp
United States
Remote

Who this role is best for

Platform engineers with Kafka and distributed systems expertise will find this fast-moving fintech role with a remote work arrangement in the US.

Best fit for

  • Candidates with 7+ years of experience in building scalable financial systems and Kafka-based architectures
    — “7+ years of experience in software engineering within fintech, cloud infrastructure, or large-scale distributed systems environments
  • Individuals who have created frameworks or tooling to boost engineering velocity and observability
    — “Experience building developer platforms, internal tooling, or frameworks that enable other engineers to move faster

Things to consider

  • The role demands a high level of proactivity and execution capability in a fast-moving environment
    — “Drive and proactivity - everyone here is a builder and executor
  • The position requires working in a collaborative, cross-functional setup with engineering, data, and AI teams
    — “Partner closely with engineering, data, and AI teams to solve complex distributed computing challenges

How to stand out

  • Highlight your experience with Kafka-based event-driven architectures in your resume and interview responses
    — “Strong hands-on experience designing, operating, and scaling Kafka-based event-driven architectures
  • Demonstrate your cloud-native AWS deployment experience, especially with Kubernetes and microservices
    — “Production experience in AWS cloud environments and building cloud-native infrastructure
  • Emphasize your ability to architect and manage high-availability distributed systems
    — “Deep expertise in distributed systems, asynchronous processing, and high-availability platform services
Pace · Fast PacedCollaboration · HighAutonomy · HighDecision Impact · TeamLevel · Senior

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • designed and operated core platform services
  • built Kafka-based event streaming systems
  • developed internal developer tooling
Typical background
7+ years of software engineering experience in fintech or large-scale distributed systems

Skills & requirements

Required

Distributed SystemsCloud InfrastructureEvent StreamingDeveloper ToolingHigh-availability Services

Preferred

Fintech ExperienceAi/ml Projects

Stack & domain

KafkaEvent StreamingCloud InfrastructureDistributed SystemsAsynchronous ProcessingHigh-availabilityAWSNode.jsTypeScriptNestJSKubernetesReact NativeCommunicationLeadershipProblem SolvingTeamworkInitiativeFintechCloud ComputingMicroservices

About the role

Original posting from Oneapp via Ashby

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 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.

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

YOU BRING

  • 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

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 talent@onepay.com.

Source: Oneapp careers (Ashby)

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