Mobile App Developer

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 need to be excited about the problem that we are trying to solve
• 3+ years of experience building applications in Kotlin
• Build pixel-perfect, buttery smooth UIs across both mobile platforms.
• Strong Js fundamentals - You should be able to contribute partially to our existing React Native development as well
• Ability to give clarity and communicate well with the team, including Product, Backend and Dev-Ops (if and when needed)
• Ability to use profiling tools well, getting to root causes of bugs fast
• Ability to pick and work on adjacent technologies if and when required (Eg: If the best performance monitoring solution needs a basic firebase setup, that should not be a blocker for you to go ahead and do so)
• Maintain code and write automated tests to ensure the product is of the highest quality.
• Reach out to the open-source community to encourage and help implement mission-critical software fixes
• You need to be comfortable working in a remote environment (Good internet connection and availability on phone is needed)
• Deep understanding of android architecture
• Understanding of inter app communication
• System design thinking

React Native Developer Responsibilities

• Architect, develop, and maintain high-quality React Native applications using clean code.
• Use additional JavaScript libraries, such as Redux, to make asynchronous API calls and enhance website loading speed.
• Implement pixel-perfect user interfaces that match designs.
• Diagnose and repair bugs and performance bottlenecks for native-like performance.
• Reach out to the open source community to encourage and assist in implementing mission-critical software fixes—React Native moves quickly and frequently breaks things.
• Participate in sprint retrospectives and daily standups as well as two-week sprints.
• Utilize new, contemporary, smooth animations and transitions to provide a great user experience.
• Plan the data and presentation layers of the application's front end.
• Be a part of a React Native developer community that shares knowledge and assists one another when problems arise.

React Native Developer Requirements

• Bachelor's/Degree Master's in Computer Science/Information Technology plus 3+ years of industry experience.
• Extensive knowledge of React tools such as Webpack, Enzyme, React.js, Flux, and Redux.
• Strong command of the JavaScript, TypeScript, or ClojureScript languages and their nuances, including ES6+ syntax.
• REST API knowledge, the document request model, and offline storage.
• Ability to identify with FullStack clients' goals and commit to delivering on the promises you and your team make to them.
• You work well in groups and enjoy working in the office with your coworkers.
• A positive outlook and a go-getter attitude

Kutumb is the first and largest communities platform for Bharat. We are growing at an exponential trajectory. More than 1 Crore users use Kutumb to connect with their community. We are backed by world-class VCs and angel investors. We are growing and looking for exceptional Android Developers to join our Engineering team. 

More on this here - https://kutumbapp.com/why-join-us">https://kutumbapp.com/why-join-us.html

Core Responsibilities:

• Architect and develop new flows and features on our Android app
• Build robust UI which work well on different screen densities and interactions that result in a delightful experience
• Iterating and building experiments
• Will be working with Kotlin

You are the right fit if you have:

• Strong Android fundamentals
• Build from scratch and be a good decision maker
• The Ownership skills and can own the problems end to end
• The Zeal and willingness to put in extra efforts to build a product which will be used by millions of users, and most importantly
• The ability to find the solution to any problem and get things done

What we offer:

• High pace of learning
• Opportunity to build the product from scratch
• High autonomy and ownership
• A great and ambitious team to work with
• Opportunity to work on something that really matters
• Top of the class market salary and meaningful ESOP ownership

Opportunity:

Create a consumer facing front end application that will be used by millions of users. 

What you will do:

• Develop our mobile apps using Swift/ObjectiveC.
• Work with backend, frontend, and other developers to build out a customer-centric experience that will constantly evolve.
• Work with our designers and customer success team to create a seamless user experience.
• Respond to support team tickets as needed to resolve bugs and issues.
• Participate in contributing ideas, updates, and product development areas to the team.

Experience Range: 

3-5 years with technical hands-on experience in building a consumer mobile app. You must have shipped an app to the stores.

Technical Expertise:

• 3-5 years experience with iOS native apps.
• Strong knowledge of Swift and ObjectiveC.
• Strong command of JavaScript ES6.
• Know how to build (fairly) complex layouts without using any CSS frameworks.
• Strong problem solving and analytical skills using data structures.
• Comfortable in a fast-paced startup environment.
• Bias for action shipping quality code quickly.

• Designing the Mobile Application for our product offering
• Communicating effectively in a cross-functional product development team and present ideas and designs effectively.
• Identifying and correcting bottlenecks and fixing bugs
• Helping maintain code quality, organization, and automatization

About Plum

We are making health insurance - simple, accessible and affordable. Hundreds of businesses of all sizes from startups to large corporates trust Plum for their employee's health protection.

Healthcare in India is seeing a phenomenal shift. Healthcare cost is seeing an inflation that is three times the general inflation. Treatments of diseases including Covid-19 can wipe out entire household savings. Majority of Indians won't be able to afford a health insurance on their own. As many as 600mn Indians would depend on employer-sponsored insurance.

Enter Plum. Plum is re-imagining the health insurance stack, and accelerating the penetration of health insurance in India to 100%. Plum has forged new underwriting and fraud detection algorithms to enable companies as small as 2 to benefit from a group insurance. The platform enables realtime insurance design & pricing to enable companies to buy insurance in 3-clicks. And offers employees a hassle-free claims experience through an integrated digital process.

Plum is backed by leading global investors including Tiger Global, Sequoia Capital, Tanglin Ventures and Incubate Fund (read more https://www.plumhq.com/blog/plum-series-a-funding">here)

• Design, build, and maintain high performance, reusable, and reliable Java code. 
• Translate designs and wireframes into high quality components and modular code, ensuring the best possible performance, quality, and responsiveness of the application
• Strong advocate of Google’s Android design principles and interface guidelines
• Strong sense of ownership and integrity demonstrated through clear communication and collaboration.Having experience with building and maintaining an open source project or design library is a plus.

• 3 + years of experience of Android SDK, different versions of Android, and how to deal with different screen sizes. 
• Experience with local databases, offline storage, threading, and performance tuningExperience with Kotlin and Jetpack Compose is desirable.
• Familiarity with RESTful APIs to connect Android applications to back-end services
• Familiarity with the use of additional sensors, such as camera, gyroscopes and accelerometers
• Knowledge of the open-source Android ecosystem and the libraries available for common tasks
• Ability to understand business requirements and translate them into technical requirements

• S/MS degree in Computer Science, Engineering or a related subject
• Proven working experience in software development
• Working experience in iOS development
• Have published one or more iOS apps in the app store
• A deep familiarity with Objective-C and Cocoa Touch
• Experience working with iOS frameworks such as Core Data, Core Animation, Core Graphics and Core Text
• 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

About the Role:

Are you a talented & enthusiastic Android development expert with a love for mobile based technology and Open-Source communities? Would you like to work on a project with large social impact? Are you experienced with Databases on Android, creating developer APIs and complete Android applications? Are you comfortable leading a small team and interacting with stakeholders from customers and outside stakeholders? Then we would like to hear from you!

Key Responsibilities:

• Take part in the development and enhancement of an Open-Source SDK
• Be both an individual contributor with hands-on development responsibility, as well as a mentor and lead for a small developer team
• Contribute to the Open-Source community interaction, including participation in the discussion forums
• Review code contributions, review pull requests
• Create and maintain the documentation for the SDK
• Design and development a usable and functional Android reference app
• Hands-on Android development, including feature development, troubleshooting, debugging, problem solving and bug fixing
• Design and run your own unit test cases, integration test cases and test automation
• Analyze new requirements, investigate feasibility, suggest implementation options and estimate efforts timeline, dependencies and risks
• Collaborate closely with other development team members, including some being located at other parts of the world

Required Skills:

• 9+ years of experience in the software development industry
• 5+ years of experience in Android development
• 5+ years of experience in Java and/or Kotlin, with strong programming and software engineering skills
• Good understanding of Android related programming patterns and OS facilities, including activities, fragments, views, lifecycles and UI components
• Experience with SQLite database development
• Excellent communication skills, especially written
• Experience in creating software architecture and design document, as well as externally-focused technical documentations
• Readiness to work in a global team with contributors from different backgrounds, skills and locations
• Experience in leading small technical teams
• Bachelor’s degree in Software/Computer Engineering, Computer Science or related field, or comparable relevant experience

Preferred Bonus Skills:

• Experience in Design and Implementation of RESTful APIs
• Experience in Database design and implementation
• High proficiency in Kotlin, including multi-threading and synchronization (Kotlin coroutines)
• Experience in Open-Source development
• GitHub experience (Continuous Integration, GitHub routines)
• Real-life experience with mainstream commercial-grade mobile apps used by a broad user base (please provide links to app listings)
• Experience with Jetpack libraries (fragment library, recycler view)
• Familiarity with Java 8 libraries such as Java Time
• Hands-on experience in the Agile/Scrum development process
• Good understanding of OOPS concepts, design patterns, algorithms and data structures
• Good understanding of Material Design Language and human interface guidelines
• Experience with integrating mobile applications with cloud services