Senior Android 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.

What We Expect:

• Min 3 years of mobile development experience, with Flutter & Dart.
• Proven ability to build and scale real-time, high-performance fintech applications.
• A sharp eye for stunning UI/UX design that balances aesthetics with seamless functionality.
• Mastery over state management solutions (Provider, Riverpod, BLoC, or similar).
• Hands-on experience with real-time data streaming, push notifications, and WebSockets.
• Strong expertise in security, encryption, and compliance—you know fintech demands precision.
• A track record of integrating RESTful APIs, GraphQL, and third-party services into flawless mobile apps.
• A mindset that thrives under pressure—we work fast, and we expect results.
• Lead the development of world-class fintech mobile applications that redefine user expectations.
• Architect and optimize blazing-fast, low-latency Flutter applications for financial markets.
• Work with designers, backend engineers, and product teams to craft seamless, intuitive, and ultra secure user experiences.
• Solve hard problems at scale—whether it’s optimizing performance, reducing load times, or ensuring absolute security.
• Push the boundaries of mobile fintech innovation, from AI-powered insights to predictive analytics.
• Own your work end-to-end—no excuses, no hand-holding, just results.

Must-Have Skills:

• Min 3 years of mobile development experience, with 2+ years in Flutter & Dart.
• Proven ability to build and scale real-time, high-performance fintech applications.
• A sharp eye for stunning UI/UX design that balances aesthetics with seamless functionality.
• Mastery over state management solutions (Provider, Riverpod, BLoC, or similar).
• Hands-on experience with real-time data streaming, push notifications, and WebSockets.

Why Join Us?

• Work with some of the sharpest minds in fintech and mobile engineering.
• Build products that traders, investors, and financial professionals rely on daily.
• A culture that values bold innovation, fast execution, and pushing boundaries.
• Expect challenges, high expectations, and relentless pursuit of excellence.
• Take complete ownership—from ideation to deployment, every pixel and every line of code should scream excellence.
• Competitive compensation, performance-driven growth, and a real opportunity to lead and shape the future of fintech mobile applications.

• 6+ years of experience in Software Development and writing Unit tests for Mobile Apps
• Excellent designing, debugging and programming skills in an Object oriented programming language like C#, Java, javascript, Swift, Dart etc.
• Experience with Native Mobile development (Android or IOS) and Cross-Platform mobile development (preferably Flutter)
• Solid understanding of SOLID principles
• Strong knowledge of writing code for testability, modularity and extensibility
• Knowledge of test methodologies and corresponding unit test framework tools like JUnit etc.
• Excellent communication and organizational skills.
  
  

• Experience working with BloC Pattern and Dependency Injection
• Knowledge of Eventing based programming patterns. 
• Exposure to integrating Performance, Analytics, Attribution tools
• Experience of using Flavors in application development
• Knowledge of Multi-module development in Flutter (ex- via Melos)

• Work with the product team and drive design, development and delivery of new features.
• Investigate and fix issues referred to by the support team. Write code to automate tests to automate regressions.
• Work on improving stability, debuggability, testability of existing functionalities/modules/components
• Integrate REST and GraphQL APIs and consume in app.
• Serve as a technical lead for the team
• Mentor team members

Responsibilities:

• Work with our dynamic team on different projects (products & services) to build high quality mobile application
• Designing and building native mobile applications for Apple’s iOS platform 
• Collaborating with the design team to define app features
• Work on bug fixing and improving application performance
• Publishing application on App Store
• Debug and optimize code for performance and scalability
• Designing and implementing application updates. Turn feedback into custom solutions for client needs
• Create and maintain the technical documentation
• Collaborate with a team to define, design, and ship new features
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency
• Stay up-to-date with the latest iOS technologies and advancements

Skills:

• Strong Knowledge & understanding about SWIFT and Objective C
• Strong Knowledge & understanding of executing projects in Xcode, OOPs concept
• Ability to write clean, maintainable and efficient code
• Familiar working with RESTful APIs, third party libraries and API, cloud message APIs and push notifications
• At least have published and managed 1 app in Appstore
• Knowledge and understanding in Dependency injection tool like dagger or similar
• Knowledge of Hybrid app development platforms will be preferred

Characteristics:

• Good communication skills across all platforms
• Creative mind-set – and the ability to approach a problem creatively
• Highly organized with the ability to work independently in a fast paced team environment
• Ability to work in a team in a transparent and entrepreneurial culture. 
• Self-motivated with initiative to reach challenging targets
• Exceptional attention to detail
• Positivity, focus and a winning mentality allied with kindness
• Curiosity, energy, creativity, and bravery with a strong desire to help to build the o2h culture

Frameworks - Android, Kotlin

Core Java

Data structure

Sqlite, Rest API, Android UI development, API Integration 

Developing, releasing, and maintaining native Android Applications and oversee mobile application development efforts 

Deliver across the entire app life cycle, design, build, deploy, test, release to app stores, and support

Working directly with product and backend developers to conceptualize, build, test, and realize products

Work on bug fixing and improving application performance

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

Optimizing performance for the apps and keeping up to date on the latest industry trends in the mobile technologies

1. Integrate the design into high quality code
2. Ensure the performance, quality, and responsiveness of application
3. Identify and correct bottlenecks and fix bugs
4. Work along-side other developers working on different platform for the Application.
5. Therefore, commitment to collaborative problem solving, design implementation and creating quality product is essential

1. Minimum 2 years of experience in iOS Application Development
2. Proficient with iOS SDK, Swift and Cocoa Touch
3. Understanding of Apple's design principles and interface guidelines
4. Must have already deployed at least one app on AppStore
5. Working knowledge of Web Services & REST (JSON) APIs, SQLite, Google API
6. Integration, Firebase
7. Familiarity with cloud message APIs and push notifications
8. Experience with third-party libraries and APIs
9. Strong mobile UI design and implementation experience
10. Understanding of code versioning tools

• FRONT-END iOS development in SWIFT (preferable), OBJECTIVE C using AGILE METHODOLOGY to design, develop, debug and deploy iOS Mobile applications with modern architectural practices
• Cross-functioning with our product development team wherein you’ll tackle complex tasks and transform them into intuitive, accessible and easy-to-use UI for our customers around the world
• Follow the coding guideline standards to ensure a bug free code as per industry norms.
• Complete unit testing of the code before sending it for review
• Participate in the complete agile software delivery cycle, including development, testing, troubleshooting etc.
• Participate in process improvement program to improve the overall quality of the delivery process.
• This role offers good exposure in E-COMMERCE SEGMENT with HIGHLY SCALABLE design solutions
• Min of 3 years of relevant experience in iOS app development is a must, preferably in e-commerce vertical

• Proven knowledge of iOS SDK and development on X-CODE IDE using SWIFT (preferable), knowledge of OBJECTIVE C, JAVA will be an added advantage
• Responsive Front End Designs with adaptability to various screen sizes
• Familiarity with REST web services and RESTful APIs. Knowledge of SOAP would be an added advantage
• iOS UI design principles, patterns, and best practices, preferably MVC, MVVM & MVP
• Good knowledge of SQLite, JS/JQuery for database management
• Proficiency in code versioning tools/Source Code Repositories like GIT, SVN
• Experience with offline storage, threading (AJAX), and performance tuning
• Agile/Scrum methodology using JIRA or any agile tool
• Exposure to security protocols for code, data and system
• Knowledge of the open-source iOS ecosystem, OOPs and the libraries
• A knack for benchmarking and optimization
• Familiarity with continuous integration

• Self-learner with passion for learning new technologies along with a creative problem-solving approach
• Strong communication skills (verbal & written)
• Should be adaptable to new ideas and have an out of box thinking approach
• Effective interpersonal communication skills in a highly collaborative team environment

• 3-5 years of relevant experience
• B.E/ B. Tech/ M. Tech in Computer Science/ Electronics Communication/ IT engineering
• M.Sc. (Computer Science or IT)/ MCA from a reputable institute
• Good communication in written and spoken English