OneApp Technologies Inc. logo

Full Stack Engineer, Identity and Onboarding

Job Overview

Location

Indiana, USA

Job Type

Full-time

Category

Full-Stack Engineer

Date Posted

March 4, 2026

Full Job Description

đź“‹ Description

  • • Join OnePay Technologies Inc., a rapidly growing fintech company backed by Walmart and Ribbit Capital, as a Full Stack Engineer on our critical Identity and Onboarding team. We are on a mission to revolutionize personal finance by offering an all-in-one platform that includes banking, high-yield savings, credit cards, lending, investing, and crypto. Our innovative approach also extends to partnering with employers and gig platforms to embed financial services directly to millions of employees and frontline workers. At OneApp, we move fast and are looking for exceptional, driven individuals who are ready to run, hungry for impact, and possess a low ego while excelling in their craft.
  • • In this pivotal role, you will be instrumental in shaping the user's first and ongoing experience with OnePay. You will own the development and maintenance of the core flows that enable users to sign up, sign in, and manage their profiles across our entire suite of products. This is a unique opportunity to work on foundational systems that handle sensitive financial data at scale, solve complex problems with no real precedent, and directly contribute to the growth and success of a category-defining fintech platform.
  • • You will collaborate closely with a talented team of engineers, fostering a culture of partnership and shared problem-solving. Your contributions will be vital in building and maintaining robust, scalable systems that underpin our user experience. We believe in the power of documentation to support our growing and remote organization, so you will also play a key role in creating and updating essential documentation to ensure clarity and efficiency for the entire team.
  • • The challenges you will tackle are significant and impactful. You will be responsible for developing and maintaining non-trivial products and services that are essential to our operations. This includes architecting solutions that can handle the complexities of real-world money movement and ensuring the security and integrity of sensitive financial data. You will be at the forefront of creating novel financial mechanics, pushing the boundaries of what's possible in the fintech space.
  • • We are seeking engineers who are not just coders, but true builders and executors. You will bring a passion for your craft, demonstrating a deep care for the quality of your code, the clarity of your communication, and the strength of our team culture. An "act-like-an-owner" mentality is paramount; we encourage a bias toward taking action and driving initiatives forward.
  • • This role offers immense opportunities for professional growth. We are committed to investing in our people and expect you to have a strong desire to continuously expand your skills and learn quickly. We envision this role as a long-term opportunity for individuals who are eager to grow with us and make a lasting impact.
  • • Our technology stack is modern and robust. On the server-side, we utilize Node.js and TypeScript, powered by the NestJS framework within a microservice-oriented architecture deployed on Kubernetes and AWS. For our client-facing applications, we develop features for iOS, Android, and web platforms using React Native. While direct experience with every tool is not mandatory, a strong foundation in modern software engineering practices will enable you to ramp up efficiently and contribute meaningfully from the outset.
  • • As a remote-friendly organization based in the US, we offer a flexible and inclusive work environment. You will be part of a high-growth, mission-driven culture where your contributions are recognized and have a tangible impact on millions of users. This is your chance to build something truly special in the fintech industry, working alongside some of the brightest minds in the field.

Skills & Technologies

TypeScript
React
Node.js
AWS
Kubernetes
Full Stack
Remote

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OneApp Technologies Inc. logo
OneApp Technologies Inc.
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About OneApp Technologies Inc.

Mobile-first platform that consolidates payments, loyalty, and merchant services into a single SDK for businesses. Offers card-linked offers, cashback programs, and real-time analytics to increase customer retention. Focuses on financial institutions, retailers, and fintechs seeking to unify consumer spending experiences across physical and digital channels.

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