Frontend Developer -Mobile

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.

What you need to have:

Experience: 3 to 5 years

Annual CTC: Rupees 7,00,000 to 9,00,000

• Experience in developing enterprise grade Android Mobile Apps, NDK, and SDKs.
• Experience in Rest i.e SQLite, Faragments, Activities, Intents, Google API’s (FCM, MAP, Analytics, AdMob etc.).
• Experience in apps development with Payment gateway Integration and POS terminal like VeriFone/Ingenico/Pax.
• Experience on client-server application involving web service calling.
• Knowledge of Android Life Cycle and Threading Concepts.
• Knowledge of the general mobile landscape, architectures, trends, and emerging technologies.
• Strong understanding of material design, memory management, files I/O, network protocols, concurrency, multi-threading etc.
• Strong understanding of OOPs fundamentals, Java, Kotlin, JSON, Android 5 and above.
• Knowledge in architecting large solutions using patterns, like MVVM, VIPER.
• Knowledge of different screen sizes,andandroid version classes compatibility.
• Knowledge of Third party libraries like Volly, Retrofit, ButterKnife, Picasso.
• Knowledge of XML, JSON parsing, GPS and Google Maps integration.
• Knowledge of Firebase Services Other Third-party Services.
• Understanding of code versioning tool, like Git.
• Familiarity with deploying Android apps to the Google Play Store and should have published at least five Android app.
• Knowledge of OPENGL.

Mandatory: Hands on experience working with Swift 3 , Swift 4. Very strong logical skills. Good hold on operating system concepts and data structure. Experience with web services , core-data , camera kit , image caching concepts, keychain , past experience working with one of the design patterns like MVC / MVVM / Viper , network check.

• You will work on long-term React Native mobile applications for innovative startups.
• Together with your colleagues and our clients you will analyse requirements and envision a qualitative solution. You will be responsible for the entire development - from architecture to implementation - and deliver user-friendly, performant and well-tested mobile applications.
• You will be part of our continuous improvement culture, hone your skills and share your experience with your colleagues.

• You have at least 3-year experience implementing and deploying React Native apps.
• You developed and published at least one React Native app on Google and Apple Store.
• You are familiar with Google and Apple Store guidelines and compliance.
• You can build pixel-perfect UIs for all mobile platforms.
• You have strong knowledge of Javascript ES6 and higher.
• You know how to make a solid relational data model and have a good knowledge of SQL.
• You have integrated a variety of web API's and understand HTTP.
• You know how to write clean and flexible object-oriented code.
• You have a good understanding of async programming concepts.
• You work daily with tools like Git, NPM and a proper IDE (Webstorm).
• You can deliver POCs, experiments and technology evaluations following design thinking practices.
• You will be contributing towards architecting and building React Native applications, as well as coordinating with the teams responsible for other layers of the product/project infrastructure.
• You write clean code and are a pragmatic programmer.

• You wish Typescript was the default language of the web.
• You stepped outside the Expo world and have experience with native iOS or Android development. You are familiar with XCode and Android studio, and leverage native APIs for deep integration with Android and iOS.
• You have experience with state management libraries like MobX and Redux.
• You write automated tests and perform end-to-end testing with Detox or Appium.
• You are familiar with functional programming concepts and apply it occasionally.
• You worked with other hybrid mobile platforms like Sencha, HTML5, PhoneGap, etc.
• You have experience with Scrum and Lean methodology