Mobile web app development engineer

Job Description : React Native Developer (Full Stack)

Location : Remote

Joining : Immediate

Summary :

We are looking for an experienced React Native Developer with full-stack development expertise and a proven track record of handling end-to-end project delivery. If you thrive in a fast-paced environment and enjoy working on impactful projects, we want to hear from you!

Key Responsibilities :

• Design, develop, and maintain cross-platform mobile applications using React Native.
• Implement backend services using Node.js, Express, or similar technologies.
• Handle end-to-end project delivery, including requirement gathering, design, development, testing, and deployment.
• Collaborate with cross-functional teams to ensure seamless integration of front-end and back-end systems.
• Optimize performance and ensure scalability for mobile and web applications.
• Debug, troubleshoot, and resolve technical issues promptly.

Requirements :

• 2+ Years of experience in full-stack development with a focus on React Native.
• Proficiency in JavaScript, TypeScript, Node.js, and RESTful APIs.
• Hands-on experience with databases like MongoDB, PostgreSQL, or MySQL.
• Strong understanding of mobile UI/UX design principles.
• Proven experience in delivering end-to-end projects.
• Familiarity with version control systems (e.g., Git).
• Immediate availability for joining.

Why Join Us?

• 100% remote work environment.
• Work on exciting projects with cutting-edge technology.
• Collaborate with a team of talented professionals.

What this role is

The market has no shortage of mobile developers who only do mobile, and no shortage of full-stack engineers who have never shipped a production app. This role is neither of those.

You are a Product Engineer whose centre of gravity is mobile. React Native is where you live. You have shipped apps, debugged native integrations, handled platform-specific edge cases, and understand what it actually takes to get something through App Store and Play Store review. That is the non-negotiable foundation.

But at Fountane, Product Engineers build products — not layers. The same feature that lives in a mobile app often has a web surface, an API, a webhook, or a database schema behind it. At L3 you are expected to own the full application surface of what you are building, not hand off the moment the work touches a backend. You will not be doing everything alone — you have a pod. But you will need to be capable of crossing the boundary when the work demands it.

You are joining a permanent Island pod. Your first deployment is to an ongoing client engagement that requires your mobile depth immediately. After that, you are a long-term Islander who will move across engagements as the Mainland deploys you.

What Fountane is actually asking for

We know the market has specialists. We are not pretending this is a standard full-stack role with mobile as a footnote, or a mobile role where full-stack is irrelevant. Mobile is your primary skill. Everything else is your secondary obligation. If you have spent your career going deep on React Native and can hold your own on an API or a web feature when needed, this role fits you.

If you are a pure mobile specialist who cannot — or will not — touch anything outside the app layer, this is not the right fit. Not because we do not respect specialisation, but because Islands do not have room for hard walls between disciplines. The work crosses boundaries. So must you.

What you will own at L3

• React Native application development — the primary mobile codebase, feature delivery, and platform-specific implementation across iOS and Android
• App Store and Play Store release management — build pipelines, submission, review compliance, and versioning
• Native integrations — push notifications, device permissions, biometrics, deep linking, offline-first patterns, and platform SDK integrations where required
• Context Engineering — translating Concept Engineer prototypes and briefs into a clean, scalable mobile architecture using Cursor as your primary execution tool
• API integration and backend contribution — consuming and, where needed, building or modifying the backend services your mobile surfaces depend on
• State management architecture — owning how data flows through the mobile application, not just implementing patterns handed to you
• Cross-platform consistency — ensuring iOS and Android behaviour is intentional and documented, not accidental
• Cursor .cursorrules contribution — maintaining the Island's mobile-specific coding standards and context files so the codebase stays navigable as it grows
• Refactoring and codebase stabilisation — at L3 you are expected to work safely on an existing codebase, not just greenfield. You use Cursor's codebase context to edit and optimise without breaking what already works
• Mentoring L1 and L2 engineers on the Island — reviewing their code, raising the quality bar, and making sure mobile-specific patterns are being applied correctly across the pod

The technology you will be working with

This role is being hired for a specific active engagement. The following is the technology stack in use on this project. If you have not worked with these directly, do not apply.

• React Native — cross-platform mobile, iOS and Android
• TypeScript and JavaScript (ES6+) — the entire codebase is typed
• State management — Zustand and Redux; you need to know both and have an opinion on when to use each
• API integration — RESTful APIs and GraphQL; you will be consuming both
• Push notifications — Firebase Cloud Messaging (FCM) and Amazon SNS
• List rendering and UI performance — FlatList and related React Native optimisation patterns; this is not optional on a project of this scale
• Git — branching, PR reviews, and version control discipline on a team codebase
• iOS and Android platform guidelines — you understand the design and behavioural expectations of both platforms and implement accordingly

Bonus — useful but not required to apply:

• Native Android (Kotlin/Java) or iOS (Swift/Objective-C) experience
• Mobile testing frameworks — Jest, Detox, React Native Testing Library
• CI/CD pipeline experience for mobile applications
• Performance monitoring and analytics tooling

Proof-based qualifications

We do not assess candidates on years of experience or job titles. We assess on proof of capability. When you apply, be prepared to demonstrate the following:

What we look at

What you must show

2–3 shipped apps

Live applications on the App Store and/or Play Store that you built or were a primary engineer on. Provide links or app names in your application. We will look them up. If you cannot name two shipped apps, do not apply.

React Native + TypeScript

A codebase or feature set demonstrating typed React Native development — components, hooks, context API, and state management using Zustand or Redux. Not a tutorial project.

API and backend integration

A feature where your React Native work connected to a RESTful or GraphQL API — ideally one you also built or modified on the backend side. Show us the integration, not just the consumption.

Cursor-driven workflow

Walk us through how you currently use Cursor and Claude in your build process. Not a demo. A real conversation about how AI tooling has changed how you write and debug code.

A CV listing React Native and a GitHub with no shipped apps is not proof. Show us what you have built.

AI tooling at Fountane

Claude and Cursor are the primary tools for thinking, drafting, and executing work at Fountane. Every Product Engineer — including this one — is expected to use Cursor as their main development environment and Claude for context engineering, debugging, and architectural thinking.

This is not a listed skill. It is the working method. If you are not already building with Cursor and Claude integrated into your daily workflow, you will need to get there fast. The Island's velocity depends on it.

Who should not apply

• You have only built mobile apps backed entirely by third-party services (Firebase, Supabase) and have never touched application logic outside the app layer.
• You cannot name two or more applications you have shipped to the App Store or Play Store.
• You treat mobile as a skin over a web app. You have not handled platform-specific native behaviour, device APIs, or cross-platform edge cases.
• You are not using AI tooling in your current workflow and see it as optional.
• You need a clear boundary around mobile and expect the backend work to always belong to someone else.

What comes next

L3 is not a ceiling. The path to Lead PE — Mobile requires demonstrated ability to orchestrate the Island's full application architecture across mobile and backend, define the .cursorrules for the pod, manage Island velocity, and handle client technical conversations without the Lead CE in the room. Promotion is not tenure-based. It is triggered by demonstrated capability at the next level's complexity tier.

About Fountane

Fountane is a technology ventures lab - one part product studio, one part startup engine. We build high-quality software and AI products for clients ranging from fast-moving startups to large enterprises, and we co-build and invest in new companies when we see the right opportunity.

Founded in 2017 and headquartered in Minneapolis, we have grown to 60+ people across four continents and were recognised as one of America’s fastest-growing companies, ranking No. 699 on the Inc. 5000 with 595% three-year growth.

We are radically open-minded, serious about craft, and direct about expectations. If you want to do meaningful work without politics, this is the place.

• Minimum 3yrs of exp in building React native apps for android and iOS
• Solid understanding of iOS and Android ecosystems.
• Must have worked on hardware integration with the apps.
• Understanding of various navigation models in mobile apps
• Good at debugging, testing, performance optimization.
• Interpersonal skills: good team player, ready to take challenges ability to deliver in a fast-paced environment.

• Build pixel-perfect, buttery smooth UIs across both mobile platforms.
• Leverage native APIs for deep integrations with both platforms.
• Diagnose and fix bugs and performance bottlenecks for performance that feels native.

• Proficiency with React Native.
• Experience and Understanding of ES6 & JavaScript Concepts.
• Experience with React.js and Redux.
• Familiarity with native build tools, like XCode, Gradle Android Studio, IntelliJ
• Hands-on experience on Android, iOS platforms in creating Hybrid / Native applications.
• Has prior experience in creating bridging modules for React Native
• Understanding of the basic concepts of Android and iOS like Services, Background App Refresh, offline compatibility etc
• Hands on experience in Application Design and Development on React Native platform.
• Require knowledge of Version Control GIT.
• Understanding of Unit Testing, Debugging Methodology used in React Native Apps

• Team Members Handling Experience
• Perform checks on correct functionality of the app
• Work on bug fixing and improving application performance.
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency.
• Knowledge of React and the Javascript ecosystem
• Exposure to building ReactNative components in native iOS.
• Knowledge of Beacons and IOT will be value addition.

• 5 Days Working
• Competitive Salary.
• Knowledge-Based Hierarchy 
• Trending Technology Development
• Career Development Programs.
• Tremendous Scope of Responsibilities and KPIs Aligned with Individual and Organisational Goals.
• Exposure to working with a team size of 50+.
• Good Project Incentives and Rewards.
• Monthly Rewards and Recognition Program- Star Performer of the Month.
• Work-Life Balance.
• Fantastic Team Spirit with Creative, Fun and Open Office Work Culture.

• Support the entire application lifecycle (concept, design, test, release and support)
• Produce fully functional mobile applications writing clean code of for React Native Platform.
• Gather specific requirements and suggest solutions.
• Troubleshoot and debug to optimize performance.
• Design interfaces to improve user experience.
• Liaise with the development team to plan new features.
• Ensure new and legacy applications meet quality standards.
• Research and suggest new mobile products, applications and protocols.
• Stay up-to-date with mobile new technology trends.

What will you do? (but not limited to)

• Design, develop, and maintain our mobile applications using either Flutter or React Native, ensuring high performance and responsiveness across both Android and iOS platforms.
• Collaborate closely with the product and development teams to design and develop innovative features that align with our mission and user needs.
• Write clean, maintainable, and efficient code that adheres to industry best practices, and conduct code reviews to uphold high-quality code.
• Troubleshoot, debug, and upgrade the software to ensure optimal performance, security, quality, and responsiveness of applications.
• Lead and mentor junior developers, fostering a culture of continuous learning, innovation, and improvement.
• Drive architectural decisions and lead efforts to scale and improve our codebases.
• Work closely with stakeholders to understand and address their needs, translating business requirements into technical solutions.

Who can apply?

• Minimum 3 years of experience as a Mobile Application Developer with a proven track record in developing and deploying mobile applications for both Android and iOS platforms.
• Proficiency in React Native, with a deep understanding of cross-platform mobile development and app architecture.
• Strong knowledge of JavaScript (for React Native), and familiarity with native build tools, like XCode, Gradle, Android Studio, IntelliJ, and other IDEs.
• Strong problem-solving skills, with an ability to think algorithmically and a keen eye for debugging and optimizing code.
• Experience with app development languages such as Swift, Kotlin, or Objective-C and with utilizing RESTful APIs for backend integration.
• Proficient understanding and utilizing code versioning tools, such as Bitbucket.
• Experience in a startup environment and building products from scratch is highly preferred.
• Excellent communication skills, with the ability to lead and inspire a team.
• Strong project management skills, with experience in agile methodologies.
• Demonstrated ability to make sound decisions based on a balance of data, experience, and judgment.

KEY RESPONSIBILITIES WILL INCLUDE:

• Participating in the entire product lifecycle (analyze, develop, test, release, and support.
• Contributing to research for new web and mobile technologies and recommend solutions to improve interface designs and interactions
• Testing, debugging, and fine-tuning to optimize the application’s performance.
• Designing intuitive applications to enhance users’ experiences.

DESIRED SKILLS AND EXPERIENCES:

• 2+ year experiences of mobile/web application development and system integration.
• Must be a skilled programmer with knowledge of coding best practices and ability to produce highly readable and maintainable code.
• Management and support of Google Play Store and Apple App Store.
• Experience in API development and integration with third-party APIs
• English communication is required. Great communication skills to coordinate across technical teams and business stakeholders.
• Creative, detail-oriented, and with good problem-solving skills
• Ability to collaborate with and lead other development team members.
• Ability to work in multiple projects and thrive in a fast-paced environment
• Candidate must possess at least a bachelor's degree or Post Graduate Diploma in Computer Science/Information Technology or equivalent.
• Specialization in IONIC must.

KNOWLEDGE OR EXPERTISE IN THE FOLLOWING ARE AN ADVANTAGE:

• Specialization in HTML5, CSS3, jQuery, and JavaScript.
• Experience with web service integration (REST, JSON, XML).
• Experience or knowledge with Git, Gitlab, GitHub is a plus.

• FDesign and implement user interface components for JavaScript-based web and mobile applications using React ecosystem

• Build app and UI components from prototypes and wireframes

• Stay updated with new updates, technologies, and news of React Native

• Strong verbal and written communication skills to communicate strategy

Skills That Will Help You In The Role

Must-Have Skills: React web and mobile along with tools like Flux, Flow, Redux, etc.

Good to Have:  JavaScript, CSS, HTML, functional programming, and front-end languages