Senior App Developer – React Native

Required Skills: Advanced Flutter & Dart Expertise, Scalable Mobile Architecture Design, Performance Optimization & Profiling, OTT & Media App Engineering, Code Quality, Leadership & Cross-Functional Collaboration

Criteria:

• 6+ years of total software development experience with minimum 3+ years in Flutter
• Product-based company experience is mandatory (B2C scale preferred)
• Proven ability to own end-to-end Flutter mobile architecture for high-scale apps
• Strong expertise in Dart, Flutter SDK internals, and advanced state management (Bloc / Riverpod / Provider)
• Hands-on experience with platform channels and native integrations (Android & iOS)
• Deep knowledge of performance optimization: app startup time, FPS, memory leaks, widget rebuilds, rendering pipeline
• Experience with profiling tools (Dart DevTools, Android Profiler, Xcode Instruments)
• Strong skills in offline-first architecture, caching layers, and API integrations
• Ability to optimize video playback, downloads, DRM, and OTT workflows
• Strong command of clean code, SOLID principles, and scalable mobile system design
• Experience reviewing code and mentoring engineers (Senior IC role)

Description

Role Overview

We are looking for an experienced Flutter SDE III who can take complete ownership of architecture, performance optimization, and app scalability for our OTT mobile applications. This is a senior individual contributor role requiring deep technical expertise and the ability to influence design decisions at a product level.

Key Responsibilities

1. Architecture & Design (High-Impact IC Role)

• Own the end-to-end architecture of company’s Flutter mobile applications.

• Design scalable, modular, testable app ecosystems aligned with OTT-specific performance constraints.

• Lead decisions around state management, navigation hierarchy, API structure, offline capabilities, and security.

2. Performance & Device Optimization

• Diagnose and resolve mobile performance bottlenecks, including:

  o App startup time, FPS drops, memory leaks.

  o Heating issues, over-rendering, and expensive widget rebuilds.

  o Battery optimization, efficient network calls, caching strategy.

• Run in-depth profiling using tools like Dart DevTools, Android Profiler, and Xcode Instruments.

3. OTT-Specific Engineering

• Optimize video playback workflows for low-latency streaming.

• Implement efficient background processes for downloads, DRM, content sync, and push notifications.

4. Product & User Experience Ownership

• Collaborate closely with Product, Backend, and Video Engineering teams.

• Convert business/product requirements into high-performance technical solutions.

• Ensure UI/UX consistency across platforms while maintaining performance budgets.

5. Code Quality & Leadership

• Write clean, extensible, and maintainable code with strong adherence to SOLID and reactive programming principles.

• Review code for mid-level and junior engineers; act as a mentor across teams.

• Establish engineering standards, internal frameworks, and reusable components for long-term scalability.

Required Skills & Experience

Technical Must-Haves

• 6+ years of total experience with 3+ years in Flutter for large-scale products.

• Mandatory product-based company background (B2C scale preferred).

• Strong expertise in:

  o Dart, Flutter SDK internals

  o Bloc, Riverpod, Provider, or other state management approaches

  o Custom animations, rendering pipeline, shader-based optimization

  o Platform channels (Android/iOS) and native integrations

  o API integration, caching layers, offline-first architecture

• Strong understanding of mobile system design, scalable architecture, and low-level performance engineering.

Good to Have

• Experience with video streaming apps, OTT platforms, or media-heavy applications.

• Understanding of analytics frameworks (Firebase, Segment, Mixpanel).

• Exposure to CI/CD pipelines, automated testing, and fastlane.

Personality & Mindset

• Product thinking, not just feature-building.

• Ownership-driven with strong ability to take strategic technical decisions.

• Comfortable working in a fast-paced 0→1 and scale-up environment.

Why Join company?

• Work on a high-growth OTT app with millions of users.

• Opportunity to own the core mobile experience end-to-end.

• Build impact-heavy features at scale with a lean, highly skilled engineering team.

• You have a minimum of 6 years of experience building high-performance consumer-facing mobile applications at Product companies of a decent scale.
• You have founded/worked in a start-up and have worked in an enterprise environment
• You have a keen eye for mobile architecture and have led/participated in architectural discussions.
• You have a passion for mentoring and helping people on your team grow and achieve their goals and work with cross teams.
• You practice test-driven development and you are able to drive agile practices.
• You have worked with multiple languages/frameworks and have expertise in any one programming language/framework/stack.
• You have published reusable packages.
• You have worked with building automation, devise farms, multi-target testing.
• You are able to optimize the application for performance and speed.
• You are an excellent collaborator & communicator. You know that start-ups are a team sport. You listen to others, aren’t afraid to speak your mind and always try to ask the right questions.
• You are excited by the prospect of working in a distributed team and company. 

Job Title: Senior React Native Developer

Location: Bangalore / Noida

Employment Type: Full-Time Job

Description: As a Senior React Native Developer, you will be responsible for architecting, building, and maintaining high-quality mobile applications. You will collaborate with cross functional teams to deliver solutions that align with the overall product architecture, ensuring smooth integration across different layers of the infrastructure. You will play a key role in the end to-end development process, from concept to deployment, while maintaining the highest standards of code quality.

Key Responsibilities: -

• Take ownership of the entire development lifecycle including analysis, functional decomposition, modelling, prototyping, code review, testing, deployment, and reporting for project deliverables.
• Maintain and optimize code while writing automated tests to ensure product quality and performance.
• Ensure timely and high-quality delivery of product releases.
• Provide accurate technical effort estimates to assist in project planning and resource allocation.
• Participate in the technical recruitment process as part of the interview panel.
• Collaborate with clients, senior business leaders, and technology teams to ensure effective communication and project alignment.

Required Skills & Experience:

• 5 - 8 years of experience in mobile application development.
• 4+ years of hands-on experience developing with React Native.
• Strong proficiency in JavaScript (ES6), React Native, CSS, and JSON.
• Familiarity with Java and experience with both Android and iOS platforms.
• Solid understanding of the mobile ecosystem, including performance optimization and monitoring.
• Deep knowledge of Native Components, Core Components, and React Native libraries.
• Experience building scalable mobile apps, with an understanding of mobile architecture and best practices.
• Expertise in debugging, root cause analysis (RCA), and problem-solving.
• Ability to multitask effectively, manage deadlines, and work under pressure.
• Strong analytical thinking, and confidence in engaging with clients and senior stakeholders.

Preferred Qualifications:

• Experience working in agile development environments.
• Familiarity with CI/CD pipelines and version control systems (e.g., Git).
• Knowledge of mobile performance optimization techniques. Mandatory Skills:
• React Native, JavaScript (ES6), CSS, Android/iOS Development.

As a Flutter Developer, you will be responsible for designing and developing high-quality mobile applications using the Flutter framework. Your primary focus will be on creating elegant, performant, and responsive user interfaces (UIs) that deliver a seamless user experience across multiple platforms. You will collaborate with a team of software engineers, designers, and product managers to transform requirements into fully functional mobile applications.

Key Responsibilities:

• Develop mobile applications using Flutter framework and Dart programming language.
• Design and implement user-friendly, responsive UI components and screens.
• Collaborate with cross-functional teams to gather and analyse requirements, and translate them into technical specifications.
• Write clean, maintainable, and efficient code following industry best practices and coding standards.
• Optimise application performance for various devices and screen sizes.
• Conduct thorough testing and debugging to identify and fix issues, ensuring high-quality deliverables.
• Integrate RESTful APIs, third-party libraries, and services to enhance application functionality.
• Stay up-to-date with the latest trends and advancements in mobile application development and Flutter framework.
• Continuously improve development processes, tools, and methodologies to enhance productivity and efficiency.
• Collaborate with designers and product managers to refine and iterate on application designs and user experiences.

Qualifications and Skills:

• Bachelor's degree in Computer Science, Software Engineering, or a related field (or equivalent work experience).
• Proven experience in developing mobile applications using the Flutter framework.
• Strong proficiency in Dart programming language and object-oriented design principles.
• Solid understanding of mobile app architecture patterns (such as MVVM or Redux) and state management solutions.
• Proficiency in UI/UX design principles and the ability to create visually appealing and intuitive interfaces.
• Familiarity with RESTful APIs and integration of third-party libraries and services.
• Experience with version control systems (e.g., Git) and agile development methodologies.
• Strong problem-solving and debugging skills to identify and resolve application issues.
• Excellent communication and collaboration abilities to work effectively in a team environment.
• Self-motivated with a passion for staying updated on emerging technologies and trends in mobile app development.

Preferred Qualifications:

• Experience in developing cross-platform mobile applications for iOS and Android using Flutter.
• Knowledge of native mobile development (Swift, Kotlin) and familiarity with platform-specific APIs and features.
• Familiarity with backend technologies and server-side development (e.g., Node.js, Firebase, or GraphQL).
• Understanding of software testing methodologies and automated testing frameworks.
• Contributions to open-source projects or personal app development portfolio.

Responsibilities:

• Writing clean and efficient codes for Android applications
• Monitoring the performance of live apps and work on optimizing them at the code level
• Identifying and resolving bottlenecks, rectifying bugs and enhancing application performance
• Performing unit and instrumentation tests on code
• Collaborating with cross-functional teams to define and design new features
• Staying up to date with new mobile technology trends, applications, and protocols

Key Requirements:

• You have experience in publishing an application on the Google Play store
• Familiarity with RESTful APIs to effectively integrate Android applications
• Proficient understanding of code versioning tools such as Git
• Familiarity with various testing tools
• You are a problem solver with good analytical skills

Skills: Java, Android SDK & NDK, MVVM/MVC/MVP

Mutual Mobile is a world-leading agency in mobile and emerging technology innovation, and we are looking for an accomplished and capable engineer to join our team!

We have built our success through timely bets on emerging technology and the rapid execution of targeted marketing campaigns and skills development. This approach has resulted in a list of premier clients that come to us to build innovative experiences using emerging technology (Nike, Google, GM, Nestle, UnderArmour). We’ve seen this happen with iOS, Android, Wearables, and IoT. We continue to evolve - it’s in our DNA - we stay at the forefront of innovation. Now, in 2019, we stand at the foot of a massive transition in emerging technology with the growth of Virtual Reality, Augmented Reality, Voice, Bots, and more. We are ready to embrace these changes and to help our clients make the most of the opportunities they bring.

At Mutual Mobile, Engineers are highly-capable, experienced producers of high-quality, extensible code. They know the ins-and-outs of their field, apply that knowledge to solve the most difficult problems, and pass along that knowledge to the next generation through mentorship. They:

• Improve the structure, quality, and extensibility of code bases
• Implement tools and best practices
• Create reusable libraries and frameworks
• Discover and evaluate new tools and technology partners

We expect Engineers to:

• Be highly-capable experts in at least one technology
• Build breadth across multiple tech stacks
• Write high-quality, extensible, testable code
• Participate in planning activities and provide accurate story estimates
• Conduct code reviews and act as a role model on the team
• Proactively breakdown work, identify risks, and explore solutions

Engineers have experience:

• Expert experience with hybrid mobile application and plugin development using Cordova, PhoneGap
• Solid understanding of vanilla JavaScript independent of any framework
• Proven expertise in JavaScript tooling—debugging and build tools
• Good to have some experience with OpenCV and creating Cordova plugins. Awesome, if worked on some camera vision-related apps in the past.
• Experience with upgrading Cordova projects on iOS and Android.
• Experience with task automation frameworks like grunt in mobile app development tooling together with Xcode and Android SDK
• Experience with salesforce mobile cloud iOS and Android SDKs is a plus
• Experience with Native iOS & Android development is a plus
• Should have expert level knowledge of HTML5, CSS3
• Should have strong debugging skills on Developer Tools of the browser and working with cross-browser UI.
• Unit and UI testing frameworks like Karma, Jasmine, Mocha, Protractor, etc.
• Should have experience in Response / Adaptive Web Design for desktop, tablet, and mobile
• Good understanding of CSS preprocessors LESS/SASS.
• Must know about the complete deployment cycle (Alpha - Beta - Prod) on the App Store and Play Store.
• Provisioning DevOps tooling and continuous integration
• Driving development best practices, including unit testing, coding standards, and code reviews
• Capable of implementing industry best-practices related to mobile application development concepts, design, and architecture

Preferred experience includes:

• Familiarity with other front-end development such as Angular,  React or Vue
• Good to have task automators like Gulp and Grunt
• System monitoring and security design and implementation

Why work for Mutual Mobile? We make great products. We craft beautiful mobile interfaces and solve complex software challenges. Clients such as HEB, Google, lynda.com, Citi, Nike, and Under Armour come to us for our deep experience in mobile and emerging technology — from establishing a mobile strategy that provides impactful business value, to build those solutions from the ground up. We bring together the brightest minds in interactive & visual design, engineering, and business management to deliver solutions that actually matter.

You’ll love working here, because this isn’t a company of silos. Team members are empowered and encouraged to pursue cool ideas, think for themselves, and make mistakes. If your passion extends beyond the role, we’ll invite your views and assistance with improving our culture, systems and processes. We know you’re smart, and that you love learning new technologies--so you’ll be able to work on a variety of projects with many different types of people.