Principal Engineer

Principal Engineer - Mobile

Development (Flutter)

Location: Bengaluru

Mode: Hybrid In-Person

The Role

We are looking for an experienced Principal Engineer Mobile Development. Youll play a

hands-on role in designing, developing, and optimizing high-scale consumer mobile applications

that power millions of user interactions every day.

The Principal Flutter Engineer will own the technical vision and implementation of our

cross-platform apps, ensuring scalability, high performance, and maintainability.

This is a hands-on individual contributor role (no direct people management) focused on

building our app for Android, iOS, and Web using Flutter.

The ideal candidate should have 8-12 years of overall software engineering experience

(including 44 years with Flutter) and a proven track record shipping large-scale apps.

What You'll Do (Responsibilities)

Design and Implement Architecture: Design and implement a scalable, maintainable

architecture for a multi-platform Flutter application from scratch that can scale. This

includes making key decisions on architecture, state management (e.g., BLoC,

Riverpod), navigation, modularization, and overall app structure.

Technical Leadership & Standards: Act as the technical lead and mentor for the

multi-platform team, establish coding standards, best practices, and development

workflows.

Testing and CI/CD: Establish testing strategies (unit, widget, integration), and set up the

CI/CD pipeline.

Performance Optimization: Obsess over app performance, profiling, identifying

bottlenecks, and fine-tuning the app for smooth (60+ fps60+ fps) rendering, fast load

times, and efficient memory usage.

Implement performance fine-tuning strategies, including widget optimization, lazy

loading, and memory management.

Ensure Flutter Web applications deliver native-like experiences with optimized

performance across mobile and browser.

Native Integration: Develop and maintain custom native plugins (Kotlin/Swift) as

needed to interface with platform-specific APIs and deliver complex features.

Technology Adoption: Stay up-to-date with Flutter and mobile/web development

trends. Drive adoption of modern state-management (BLOC, Provider, Redux,

MVVM/MVP) and other emerging technologies.

Observability: Be an expert in mobile observability tools with proven ability to optimize

critical user flows.

What We're Looking For (Requirements)

Must Have

Experience: 8-12 years of professional software engineering experience, with a

minimum of 4 years building, shipping, and maintaining complex Flutter

applications for Android, iOS, and Web. You must have significant experience working

on a production mobile app and Website that scaled successfully.

Flutter Expertise: Deep, expert-level understanding of the Dart language, Flutter

framework, architectures, Dependency Management, State Management, Patterns,

anti-patterns, and ecosystem.

Architecture & Design: Demonstrable experience designing and implementing robust,

scalable mobile architectures (e.g., Clean Architecture, MVVM, modular design).

Proven experience in building and scaling consumer-grade mobile applications

with millions of active users. Experience working in mobile application development for

customer facing D2C or E-Commerce is a plus.

Hands-on experience with CI/CD Pipelines, release management & mobile testing

tools.

Optimization Mastery: Deep understanding of NFRs performance tuning, latency,

load time, app size, and overall reliability at scale.

Flutter Web: Must have worked in Flutter Web development with an understanding of

browser-specific optimizations.

UI/UX: Knowledge of responsive design and building adaptive Uls for multiple screen

sizes. Advocate for user experience while balancing technical constraints and business

objectives.

Testing: Experience with Unit testing, Widget Testing, and Integration Testing.

Problem Solving & Debugging: Exceptional analytical ability along with problem

solving and debugging skills.

Native Familiarity: Familiarity with native development (Kotlin for Android, Swift for iOS)

is essential for building custom bridges and plugins.

Good to Have

Understanding of Flutter Internals is a plus.

Experience working in mobile application development for customer facing D2C,

E-Commerce or a fast-paced consumer internet company.

Native to Flutter Migration experience

Knowledge of mobile tools for Observability, Application Performance Monitoring,

Product Analytics and A/B Testing.

Experience in promoting and implementing mobile engineering best practices.

Note:

This is a hands-on technical leadership role requiring deep Flutter expertise

and proven experience building production applications at scale. The ideal

candidate combines strong technical skills with architectural vision and excellent

communication abilities.