Mobile App Developer

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.

Responsibilities

• Own the end-to-end development and launch of features on the our App
• Participate in scoping, planning discussions with the designers, PMs, and Leads
• Conceptualize and develop prototypes quickly
• Develop and own launch plans to completion
• Identify opportunities and implement solutions to improve the performance and the architecture of our App
• We will depend on this person to set-up/improve the code quality, tracking, and App architecture and this person needs to have extensively worked on React + Android/iOS

Required Skills



• Min. 3 years of Full-time work experience (College projects, Internships are not a part of this) Hands-on experience with React Native
• Deep expertise of either iOS or Android platform and ecosystems
• Deep understanding of your tools: Languages, frameworks, systems.
• Experience with abstracting requirements into frameworks.

Sr Android Developer - Job Description About The Role CapitalNow is seeking an Android Developer with notable experience in Java and Kotlin development. The technical team is responsible for developing the supported mobile application and web app for customers and a control panel for the marketing team involved in CapitalNow. You will be responsible for delivering best in a class mobile experience, engineering-complex, secure & high-quality native Android mobile apps for our product.

Responsibilities ● Collaborate efficiently across cross-functional teams such as product managers, UX-/UI-designers, and other software engineers ● Design, build and maintain high-performance reusable, and reliable code ● Continually improve and innovate software development, deployment and testing to ensure high-quality, on-time releases. Conduct and participate in code-reviews ● Provide UAT support & needed assistance for release management activities ● Serve as a leader for team members to learn from regarding mobile technologies, development, and delivery processes

Essential Qualifications ● At least 5 years of experience in Android Kotlin/Java development ● Excellent understanding of Objective Oriented design patterns, Android fundamentals, and Android SDK (versions 5.0 and up) ○ Experience with offline persistence, threading, memory management, and performance tuning ○ Data structure optimizations, security, IPC, App Modularization ○ 3+yrs of Experience in integrating third-party SDKs like Facebook, Gmail/Google, and Payment gateways like CCAvenue, PayU, Razorpay, etc ○ Including Android Architecture Components, Navigation Framework, Android Jetpack, Android NDK, View components, JSON, and more ● Familiarity with RESTful APIs to connect Android applications to back-end services ● Published at least two original Android apps ● Knowledge of Google Playstore Policies and experience in handling all types of permissions in Playstore ● Strong analytical, communication, and interpersonal skills Desired Qualifications ● Having experience working in the Financial Services domain (good if it's in capital markets) is an added advantage ● Familiarity with Unit Testing ● Hands-on experience as a Senior Android developer is a plus ● Having experience in writing complex queries using MySQL is an added advantage ● Immediate joiner is most preferable

Responsibilities

• Work as part of a small team to build Flutter application.
• Architect, build and maintain an excellent mobile application with clean code.
• Build pixel-perfect, buttery smooth UIs across both mobile platforms.
• Implement clean, modern, smooth animations and transitions that provide an excellent user experience.
• Integrate third-party API's.
• Write unit and integration tests.
• Release applications to the Apple and Google Play stores.
• Ability to take absolute ownership over assigned work.

Requirements

• 2 - 3 years of professional mobile application development experience.
• 2+ years of professional experience working with Flutter.
• Extensive knowledge of Dart language and ecosystem.
• Understanding of Restful API and experience on various client libraries.
• Proficient understanding of code versioning tools, such as Git.
• Meaningful experience working in a startup environment.

HBOX is a US Based Digital Health Company, Enabling Primary Care Providers (PCP) to

capture true Virtual Care Opportunities beyond Telehealth. We enable PCP to

provide Proactive and Continuous Care and add new Recurring monthly revenue

streams without any upfront cost. With our unique distribution and business

model, we are seeing fast acceptance and great adaption with our target

customers. We have built unique and Industry's first Integrated

Hardware, Cloud & AI Technologies based Virtual care Platform for PCP

Market. We are US focused Post revenue company with customers in 7 US States

and growing extremely fast.

We are looking for an Android Developer who possesses a passion for pushing mobile technologies to the limits. This Android app developer will work with their US-based counterpart to design and build the next generation of our mobile applications. This job requires both Android System and UI development competence.

Responsibilities

Design and build advanced applications for the Android platform

Collaborate with cross-functional teams to define, design, and ship new features

Work with outside data sources and APIs

Unit-test code for robustness, including edge cases, usability, and general reliability

Work on bug fixing and improving application performance

Continuously discover, evaluate, and implement new technologies to maximize development efficiency

Requirements

BS/MS degree in Computer Science, Engineering or a related subject

Proven software development experience and Android skills development

Proven working experience in Android app development and

Have published at least one original Android app

Experience with Android SDK

Experience working with remote data via REST and JSON

Experience with third-party libraries and APIs

Working knowledge of the general mobile landscape, architectures, trends, and emerging technologies

Solid understanding of the full mobile development life cycle.

Job Description

- With 2+ years of experience of React Native experience on iOS/Android. Platforms

- Must have experience on RESTful Web-Services

- Deep familiarity with Redux and common popular React Native patterns, libraries, components, and frameworks.

- Well verse in Android and Ios framework and have atleast 2 app on playstore/Appstore.

- Mobile-first design and responsive code deeply ingrained in your thought process.

- Familiarity working with REST APIs for deep integrations with both platforms i.e. general best practices, shortcomings, trade-offs, etc.

- Have a solid understanding of CSS,Javascript and react.js.

- Must be good in problem solving, Data structures andAlgorithms.

- Must be hands on writing Unit test cases.

- Ability to work with minimal guidance in fluid environments while providing guidance/stability to junior engineers in the team.

- Strong understanding of App Architectures, E-commercesolutions

- Basic knowledge of version control system like Git / Mercurial / Bitbucket

- Writes well managed and clean codes

- Hands on experience on features specifically QR scanning, Push Notifications, Deep Linking, GPS etc. are an added advantage

- Hands on experience with 3rd party tools integration like Google Analytics, Engagement tool, Payment gateway integration is an added advantage

Mandatory: Hands on experience working with Java or Kotlin. Very strong logical skills. Good hold on operating system concepts and data structure. Experience with web services , SQL Lite , camera kit , image caching concepts, keychain , past experience working with one of the design patterns like MVC / MVVM / MVP , network check implementation.

Good to have:  Rx-Swift experience , video / image filter experience , media player usage , complex UX effects , couch-db , RealM.Knowledge of GIT management , Continuous Integration and Continuous Development practices.

Soft Skills: Strong communication skills , high spirited , eager to learn , able to perform in a high pressure environment