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Contractor: Senior React Native Engineering Services
contract•Colombia, Chile, Costa Rica, Mexico, Brazil, Argentina
About this role
<p><span style="font-size: 12pt;">We are seeking to hire a skilled Contract Sr. Machine Learning Engineer based out of Argentina, Brazil, Colombia, Chile, Costa Rica, or Mexico. This role will focus on developing machine learning algorithms, data analysis, and optimizing data pipelines. The ideal contractor should have strong expertise in developing machine learning algorithms, natural language processing (NLP), and experience working with large-scale data systems.</span></p>
<h3><span style="font-size: 12pt;"><strong>Scope of Services</strong></span></h3>
<ul>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Build and maintain a scalable iOS application using React Native with deep WebView integration (navigation, cookie/session handling, file downloads, media, and safe JS/native bridging).</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Work closely with backend and frontend developers, product managers, and designers to refine requirements; proactively identify native gaps vs. the web experience.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Own delivery of features and enhancements end-to-end (requirements, implementation, tests, CI/CD, release notes) with minimal oversight.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Contribute to ticket grooming, sprint planning, and architecture/design discussions and documentation</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Ensure accessibility, responsiveness, and adherence to modern FE/RN best practices.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Leverage AI/LLM-powered workflows and code-generation tools (e.g., Copilot, Cursor) to stay efficient and productive, with code reviews to ensure quality and security.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Debug end-to-end issues across APIs, auth flows, data integrations, and frontend performance.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">App Store compliance with 4.2 (Minimum Functionality) and related iOS requirements. </span></li>
<ul>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Keep the application compliant with the relevant Apple policies as the policies change over time.</span></li>
</ul>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Release engineering and app deployments</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Legacy native iOS app: triage & ship critical fixes and security updates; create a deprecation/transition plan (migration guides, deep link parity).</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Future contribution to React web app: collaborate on shared components, accessibility, responsiveness, and WebView-compatibility contracts.</span></li>
</ul>
<h3><span style="font-size: 12pt;"><strong>Required Skills & Experience</strong></span></h3>
<ul>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">5+ years building modern web and mobile applications in a SaaS environment, with significant React/React Native iOS experience.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Expert-level React.js and React Native (functional components, hooks, context, navigation, animations, RN performance patterns).</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Strong JavaScript and practical TypeScript proficiency and familiarity with native iOS concepts</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Experience with React Native WebView: auth redirects, cookies, content injection, file/media, native navigation, push notifications, and similar.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Demonstrated ability to work with REST APIs, data relationships, and caching strategies.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Comfort using AI-assisted coding tools (Copilot, Cursor, Codeium) responsibly with security and license awareness.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">Strong communication & collaboration skills with a track record of independent delivery and crisp, solution-oriented documentation.</span></li>
<li style="font-size: 12pt;"><span style="font-size: 12pt;">App Store Readiness & Compliance:</span>
<ul>
<li style="font-size: 12pt;">Experience shipping to App Store: TestFlight, review notes, phased release, responding to rejections.</li>
<li style="font-size: 12pt;">Working knowledge of <span style="font-size: 12pt;">App Store Review Guideline 4.2</span><span style="font-size: 12pt;"> and adjacent policies.</span></li>
<li style="font-size: 12pt;">Ability to design features that clearly exceed “website-in-an-app” thresholds. Examples: native integrations, offline capability, iOS UI, device features.</li>
</ul>
</li>
</ul>
<p><span style="font-size: 12pt;"><em><strong>Please note that given the nature of the contract, this role will not be eligible to participate in company-sponsored benefits. </strong></em></span></p>
What you'll do
- The contractor will build and maintain a scalable iOS application using React Native, ensuring compliance with App Store guidelines and collaborating with various teams. They will also own the delivery of features and enhancements end-to-end with minimal oversight.
About Newsela
Newsela is a fast-growing education technology startup with a single ambitious goal: Meaningful classroom learning for every student. We provide engaging, relevant instructional content for teachers that both educates and inspires. With nearly two million teachers signed up, Newsela is helping kids improve their reading skills in all 50 states and more than 150 countries. We seek passionate, creative employees with quick minds and warm hearts. If you believe that all students deserve a more rigorous, more personalized learning experience, please apply to join our team.
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Frequently Asked Questions
What does a Contractor: Senior React Native Engineering Services do at Newsela?
As a Contractor: Senior React Native Engineering Services at Newsela, you will: the contractor will build and maintain a scalable iOS application using React Native, ensuring compliance with App Store guidelines and collaborating with various teams. They will also own the delivery of features and enhancements end-to-end with minimal oversight..
Is the Contractor: Senior React Native Engineering Services position at Newsela remote?
The Contractor: Senior React Native Engineering Services position at Newsela is based in Colombia, Colombia and Chile, Chile. Contact the company through Clera for specific work arrangement details.
How do I apply for the Contractor: Senior React Native Engineering Services position at Newsela?
You can apply for the Contractor: Senior React Native Engineering Services position at Newseladirectly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.