Mobile Engineer (Argentina, All Levels)

The salary range for this role is $3,500 - $9,500 per month (Gross in USD) About Keystone AI : With a mission to financially empower the next generation, Keystone AI is revolutionizing the shopping experience beyond payments, blending cutting-edge tech with seamless, interest-free installment plans that make shopping smarter and more accessible. We’re not just transforming payments; we’re redefining how people discover, interact with, and purchase the things they love while driving real impact on merchant sales through increased conversions and higher order values. As we continue to shape the future of fintech and retail, we’re building an innovative, dynamic team passionate about creating more than just a transaction but a truly unique shopping journey. If you’re excited about pushing boundaries in tech and delivering a game-changing experience for consumers and merchants alike, come join us at Keystone AI and help create the future of shopping! About the Role: We are seeking a talented and motivated Mobile Engineer who is best in class with a high IQ plus a high EQ. This role presents an exciting opportunity to thrive in a dynamic, fast-paced environment within a rapidly growing team, with abundant prospects for career advancement. As a Software Engineer focused on our mobile app, you will be responsible for solving challenges in our highest-traffic applications, with your work having a direct impact on our customers and product. Day-to-day, you’ll partner with your team to build out features and products in our React Native-based mobile app. In this role, you’ll also provide support for our mobile app as a platform, working closely with engineers from multiple teams to support larger product releases. As your skills grow so will the size and scope of the projects which you’ll be involved in. Keystone AI has a strong culture for promotion with defined paths through Engineering that matches all levels. You’ll be working as part of a full-stack Engineering team which has varied disciplines. Compensation: Keystone AI is a U.S. based company listed on NASDAQ. Salary ranges are: Senior : $4,700 - $9,500 USD per month Mid : $3,500 - $6,000 USD per month Interview Process We believe transparency is important at Keystone AI . Regularly providing feedback while setting expectations is part of our culture starting with the interview process. Advancement through each step is not guaranteed. Application submitted (you are here) Wonderlic test (30-40 min) Coding assessment (~1.5 hours) Interview with recruiters (30 min) Interview with engineers (1 hour) Interview with engineering leadership (30-45 min) Offer! What You'll Do: Work within our cross-platform TypeScript React Native app to build and maintain new innovative product features. Actively learn new areas of the product, and collaborate with owners for different product features to gain insight and offer constructive suggestions for improvements Be an active participant in design/architecture discussions sharing your ideas while building the next generation of features for the Keystone AI platform Hands-on with our codebase and a contributor to code reviews Work with the team to continuously build clean, scalable, robust, and testable code Assist in planning, estimations, and completion for projects brought up by the team stakeholders What We Look For: Experience solving technical problems as part of a team Bachelor's in computer science (preferred) or equivalent related experience Familiarity with modern Frontend Development, Javascript or Typescript, with React Native or React (web) experience strongly preferred Demonstrated experience working with Claude or equivalent large language model tools is required; candidates must be comfortable leveraging AI to enhance productivity, research, and communication. Preferred Knowledge and Skills: Experience developing and delivering a mobile application to a mobile app store (App Store or Google Play Store) Knowledgeable in writing automated tests for applications (unit, integration, end-to-end) Familiar with the basic principles and design of React Native Apps, and RESTful APIs Close familiarity with software engineering tools, software development methodology, and release processes About You: You have relentlessly high standards - many people may think your standards are unreasonably high. You are continually raising the bar and driving those around you to deliver great results. You make sure that defects do not get sent down the line and that problems are fixed so they stay fixed. You’re not bound by convention - your success—and much of the fun—lies in developing new ways to do things You need action - speed matters in business. Many decisions and actions are reversible and do not need extensive study. We value calculated risk-taking. You earn trust - you listen attentively, speak candidly, and treat others respectfully. You have backbone; disagree, then commit - you can respectfully challenge decisions when you disagree, even when doing so is uncomf