Senior iOS 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.

The ideal candidate will be responsible for developing high-quality applications. They will also be responsible for designing and implementing testable and scalable code.

Responsibilities

Develop quality mobile and web applications

Design highly scalable, testable code

Discover and fix programming bugs

Qualifications

Bachelor's degree or equivalent experience in Computer Science or related field

Development experience with programming languages

Hands on knowledge of dart would be great

Hands on knowledge of flutter would be great

Experience with the BLOC design pattern would be a big plus

Working knowledge of API integration

Experience with Flutter 2.0 for building both web and mobile applications would be a big plus

Good communication skills to operate in today's remote work environment

You can contact me - nine three one six one two zero one three two

Position Title:  Mobile Developer - Android                   Location: Bangalore, India    

Reports To: Manager of Mobile Development          

Position Summary:

Bottomline is at the forefront of digital transformation. We are a growing global market leader uniquely equipped to address the changing needs of how businesses pay and get paid. Our culture of working with and for each other enables us to delight our customers. We empower our teams to think like owners driving customer delight, helping them grow their business and win in their markets.

Bottomline Technologies delivers award-winning user experiences for large banks and financial institutions globally. Our Mobile Team seeks talented individuals who will deliver solutions across both business and consumer markets that are innovative, thoughtful, and set a new standard in the industry. The selected individual will be working with a talented and dynamic team building native applications for large enterprise system used by banks, insurance companies, and healthcare organizations around the world. 

Essential Job Functions:

• Design and develop native apps for Android with Kotlin and Flutter/Dart
• Build high quality and secure mobile application
• Work in fast based SCRUM teams
• Interact with Product Owners periodically; understand the requirements and provide application solutions.
• Engage with other mobile developers to create reusable code modules, flutter plugins.
• Promotes and adheres to good development practices: code/design reviews, optimization, and maintainability.
• Maintaining and contributing to technical documentation and coding standards.
• Keeps up to date with mobile application development trends and industry news.
• Design, implement and unit test SaaS applications for the mobile environment.

Required Skills:

• 3+ years hands on design and development with Android SDK with at least two apps in the PlayStore.
• A good understanding of OOPS, MVC, MVP, MVVM and other design patterns.
• Good to have worked in Test Driven Development, or Behavior driven development
• Working experience with WCAG 2.1 Level A and AA success criteria.
• Experience with Git and an understanding of CI/CD
• Experience with REST web services with JSON or XML formatted return data
• Strong communication and problem-solving skills
• Experience working in an Agile Scrum Development process

Education and Experience:

• BE / B Tech / MCA in Computer Science from a reputed university with good academic record

Responsibilities: 

• Work with an open-source iOS ecosystem and the libraries available for common tasks. 
• Work directly with developers and product managers to conceptualize, build, test and realize products.  
• Build reusable iOS software components for the platform.  

• Unit-test code for robustness, including edge cases, usability, and general reliability.   
• Work on bug fixing to improve application performance and shipping new features as required 
   

  Requirements:  

• Experience with iOS Design patterns, memory management, REST web-services and JSON Parsing. Designing and building advanced applications for the iOS platform 
•  Collaborating with cross-functional teams to define, design, and ship new features 

• Design and build advanced applications for the iOS platform  
• Work on bug fixing and improving application performance  
• Can integrate apps with backend and 3rd party API’s. 
• Good programming skills in Objective-C/Swift and extensive knowledge of Apples SDKs and frameworks like Core Data, Core Graphics, Foundation, UIKit, etc.  
• Have published one or more applications in an iOS App Store. 

• Knowledge of iOS App Store deployment process. 

• Advise and discuss with the team on the architecture and requirements.
• Bring your experience for mobile User Experience.
• Set up actions to ensure high level of quality and satisfaction
• Build and maintain efficient and reliable code.
• Support continuous improvement by investigating alternatives and technologies.

• Bachelor’s Degree in Informatics Engineering or similar
• Minimum of 4+ years work experience in similar roles
• Strong knowledge in Front-end frameworks (React Native)
• Strong knowledge in the mobile language (swift, objective-c, java, kotlin)
• Experience in unit testing and TDD.
• Advance knowledge in using testing frameworks ( Karma, Jest, Appium, Cypress ).
• Experience with Agile Methodologies (Scrum, Kanban)
• Experience in CI/CD
• Having a coaching profile, good communication skills is crucial to ensure good exchange and sharing of information within and outside of the train
• Being able to provide based on the audience synthetic or detailed information is mandatory
• Being curious to continuously learn and being a leader in your domain of expertise
• Immediate or very low availability
• Fluent in English - written and spoken (mandatory)